CN105838948A - Novel high-strength corrosion-resistant electric vehicle shell - Google Patents

Novel high-strength corrosion-resistant electric vehicle shell Download PDF

Info

Publication number
CN105838948A
CN105838948A CN201610217012.9A CN201610217012A CN105838948A CN 105838948 A CN105838948 A CN 105838948A CN 201610217012 A CN201610217012 A CN 201610217012A CN 105838948 A CN105838948 A CN 105838948A
Authority
CN
China
Prior art keywords
electric automobile
automobile shell
alloy
aluminum
corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610217012.9A
Other languages
Chinese (zh)
Inventor
董超超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201610217012.9A priority Critical patent/CN105838948A/en
Publication of CN105838948A publication Critical patent/CN105838948A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/02—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/20—Use of solutions containing silanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a novel high-strength corrosion-resistant electric vehicle shell. The novel high-strength corrosion-resistant electric vehicle shell comprises, by weight, 0.2% of Mg, 2.0% of Si, 4.0% of Cu, 0.2% of Mn, 0.2% of Fe, 0.1% of Zr, 0.1% of Er, 0.01% of Cr, 0.01% of Ni, 0.1% of Ti and the balance Al. A production method of the novel high-strength corrosion-resistant electric vehicle shell comprises the steps that (1) smelting is conducted; (2) three metal refinement additives including Al-5Ti-B, Al-lOSr and RE are added; (3) standing is conducted for 2 h under the 100 MPa condition, so that a cast ingot is formed; (4) hot rolling is conducted five times, and cold rolling is conducted three times under the condition of ultrasonic vibration; (5) laser modification is conducted through C and V; and (6) surface treatment is conducted through a trichlorooctadecylsilane solution, and a finished product is obtained. According to the novel high-strength corrosion-resistant electric vehicle shell, materials of the electric vehicle shell are modified and treated through various measures, an oxidation film can be kept intact when the electric vehicle shell is under the severe corrosion working condition, metal failure is avoided, and the requirements of current industrial development are met.

Description

Novel high-strength anticorrosive electric automobile shell
Technical field
The present invention relates to automotive field, particularly relate to novel high-strength anticorrosive electric automobile shell.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structural material in industry, Aeronautics and Astronautics, automobile, machine-building, Boats and ships and chemical industry are widely applied, is divided into 1000 series, 2000 series, 3000 series ... 9000 series.Relevant In technology, 6000 series alloys mainly contain magnesium and two kinds of elements of silicon, have, low melting point, corrosion resistance, heat-resisting, wear-resisting, Easily coating and the advantage such as processability is good, but, 6000 series alloys seldom have steel strength and mouldability so that aluminum conjunction Gold cannot replace the steel weight with alleviator equipment completely, reduces energy resource consumption and pollutant emission.And along with aluminium alloy The development of application, it is desirable to aluminium alloy and can apply different field and environment, and therefore requirement corrosion proof to aluminium alloy is more and more higher. Although aluminium alloy its surface under natural environment can generate layer oxide film to resist corrosion, but aluminum alloy surface in natural environment The thickness of oxidation film about 4nm generated, loose porous and structure is the most uneven, corrodes under severe operating conditions or from oxide-film Hole, or occur from the fray of oxide-film, cause metal failure, it is impossible to meet the requirement of current industrial development.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide novel high-strength anticorrosive electric automobile shell, solve aluminium alloy and do not have There is the technical problem of steel strength and mouldability.
For solving above-mentioned technical problem, the technical solution used in the present invention is novel high-strength anticorrosive electric automobile shell, described Shell includes Mg0.2%, Si 2.0%, Cu4.0%, Mn0.2%, Fe0.2%, Zr0.1%, Er0.1%, Cr0.01% by weight percentage, Ni0.01%, Ti0.1%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps:
(1) heating furnace used in pre-hot smelting at 300 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating is at decompression state Lower smelting temperature be the heating furnace of 750 DEG C is completely melt after add monocrystal silicon granule, add in aluminum bronze after monocrystal silicon particles fuse Between alloy, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and A small amount of rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add aluminum Titanium intermediate alloy is completely melt to aluminum titanium intermediate alloy, is cooled to 750 DEG C, skims, and adds pure magnesium, protects under conditions of vacuum Temperature 30～40min；(4) tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE are added, the weight hundred that three adds Proportion by subtraction ratio is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to Preheated to the crucible of about 300 DEG C stands under conditions of 100MPa 2h, form ingot casting；(7) described ingot casting cuts into conjunction Carrying out the homogenizing annealing of 12 hours after suitable size under conditions of 550 DEG C, stove is cooled to room temperature；(8) described ingot casting is warming up to It is incubated 3 hours after 420 DEG C, carries out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) heat Carrying out the cold rolling of three passages after rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, Excited frequency is 12kHz, aluminium alloy supersonic vibration pressurized extend, cold rolling after carry out 2 hours moving back at 240 DEG C to alloy Fire processes, and obtains certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out halfhour solution treatment at 540 DEG C, Then shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by equal for mixed-powder C and V The even surface being applied in aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified, makes Obtain and while aluminum alloy sheet material surface forms nanoscale impression, mixed-powder C and V melted the surface being covered in aluminum alloy plate materials, Using argon to protect in processing procedure, its laser process parameter area is: laser power 1.7kw, sweep speed 13mn/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
Beneficial effects of the present invention:
1, the ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and keep peak aging strengthening energy The Mg of power2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add the Cu element of proper proportion, reduce certainly So the timeliness adverse effect to material property, forms Mg more tiny, more2Si phase (acicular beta " phase), avoid adding simultaneously Electric automobile shell corrosion stability is reduced after Cu element.Add trace Mn and Cr, disperse phase can be produced, suppress alloy recrystallization, carry High alloy intensity, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds electric automobile shell In, it is possible to reduce or eliminate the gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, accelerated ag(e)ing process, And appropriate rare earth element and other elements cooperate and can effectively improve mechanical property and the corrosive nature of alloy.
2, under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heating Pressure in device, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into In molten metal, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, separately Outer noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters Oxidized metal liquation in heater.
3, three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, Make Metamorphism treatment, the tendency aggravation of alloy air-breathing as being individually added into Sr, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.
4, melted pouring metal melt is to having been warmed up standing under conditions of 100MPa 2h to the crucible of about 300 DEG C, Can prevent from metal liquid process of setting is formed the ingot casting of open structure, thus affect the intensity of electric automobile shell, simultaneously at height Advantageously form the ingot casting of compact texture under conditions of pressure, strengthen the intensity of electric automobile shell.
5, electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, from And reduce the frictional force impact on electric automobile shell plate surface, and cold rolling relative to static state, electric automobile that supersonic vibration is cold rolling Case surface is more smooth, is conducive to carrying out the operation of next step.
6, by mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, crossing current continuous wave Cq laser instrument is used Electric automobile shell sheet material is carried out laser treatment modified, can effectively make electric automobile shell plate surface form nanoscale impression While mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface is formed Nano level pit, increases the surface area of electric automobile shell sheet material, makes the octadecane of next step while improving frictional force Base trichlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro-of different morphologies in electric automobile case surface Structure, self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface of electric automobile shell sheet material Character, and the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material at high temperature Antioxygenic property, changes the surface nature of electric automobile shell sheet material.
Detailed description of the invention
The invention will be further described with the following Examples.
Embodiment one
Novel high-strength anticorrosive electric automobile shell, includes Mg0.2%, Si 2.0%, Cu4.0%, Mn0.2% by weight percentage, Fe0.2%, Zr0.1%, Er0.1%, Cr0.01%, Ni0.01%, Ti0.1%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps:
(1) heating furnace used in pre-hot smelting at 300 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating is at decompression state Lower smelting temperature be the heating furnace of 750 DEG C is completely melt after add monocrystal silicon granule, add in aluminum bronze after monocrystal silicon particles fuse Between alloy, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and A small amount of rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add aluminum Titanium intermediate alloy is completely melt to aluminum titanium intermediate alloy, is cooled to 750 DEG C, skims, and adds pure magnesium, protects under conditions of vacuum Temperature 30～40min；(4) tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE are added, the weight hundred that three adds Proportion by subtraction ratio is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to Preheated to the crucible of about 300 DEG C stands under conditions of 100MPa 2h, form ingot casting；(7) described ingot casting cuts into conjunction Carrying out the homogenizing annealing of 12 hours after suitable size under conditions of 550 DEG C, stove is cooled to room temperature；(8) described ingot casting is warming up to It is incubated 3 hours after 420 DEG C, carries out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) heat Carrying out the cold rolling of three passages after rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, Excited frequency is 12kHz, aluminium alloy supersonic vibration pressurized extend, cold rolling after carry out 2 hours moving back at 240 DEG C to alloy Fire processes, and obtains certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out halfhour solution treatment at 540 DEG C, Then shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by equal for mixed-powder C and V The even surface being applied in aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified, makes Obtain and while aluminum alloy sheet material surface forms nanoscale impression, mixed-powder C and V melted the surface being covered in aluminum alloy plate materials, Using argon to protect in processing procedure, its laser process parameter area is: laser power 1.7kw, sweep speed 13mn/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
Tensile strength, yield strength, percentage elongation and the Brinell hardness of the electric automobile shell sheet material made be respectively 398.4MPa, 325.8MPa, 20%, 112HB.
The ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and keep peak aging strengthening ability Mg2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add the Cu element of proper proportion, reduce nature The timeliness adverse effect to material property, forms Mg more tiny, more2Si phase (acicular beta " phase), avoid adding Cu simultaneously Electric automobile shell corrosion stability is reduced after element.Add trace Mn and Cr, disperse phase can be produced, suppress alloy recrystallization, improve Alloy strength, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds in electric automobile shell, Gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, accelerated ag(e)ing process can be reduced or eliminated, and And appropriate rare earth element cooperates with other elements and can effectively improve mechanical property and the corrosive nature of alloy.
Under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heater Interior pressure, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into gold Belong in liquation, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, additionally Noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters and adds Oxidized metal liquation in hot device.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell, uses the tension of the electric automobile shell of three kinds of fining modifiers simultaneously Intensity adds 6.892%, and yield strength adds 5.974%, percentage elongation add 18.0% and Brinell hardness add 9.821%.
Melted pouring metal melt, to having been warmed up standing under conditions of 100MPa 2h to the crucible of about 300 DEG C, can be prevented Metal liquid process of setting is only formed the ingot casting of open structure, thus affects the intensity of electric automobile shell sheet material, simultaneously at height Advantageously form the ingot casting of compact texture under conditions of pressure, strengthen the intensity of electric automobile shell.
Electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, thus Reduce the frictional force impact on electric automobile shell plate surface, cold rolling, outside the electric automobile that supersonic vibration is cold rolling relative to static state Shell surface is more smooth, is conducive to carrying out the operation of next step.
By mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, use crossing current continuous wave Cq laser instrument to electricity It is modified that electrical automobile shell sheet material carries out laser treatment, can effectively make electric automobile shell plate surface form the same of nanoscale impression Time mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface forms nanometer The pit of level, increases the surface area of electric automobile shell sheet material, makes the octadecyl three of next step while improving frictional force Chlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro structure of different morphologies in electric automobile case surface, Self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface nature of electric automobile shell sheet material, And the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material antioxidation at high temperature Performance, changes the surface nature of electric automobile shell sheet material.
In order to measure electric automobile case surface produced film layer corrosion resisting property in saline solution, use Tafel curve and electrochemistry resistance Anti-spectrum evaluates the antiseptic property of thin film, and before carrying out electro-chemical test, all samples all soaks a period of time in NaCl solution, Electrochemical impedance spectroscopy and Plan Curve stably measure afterwards at open circuit point position (OCP), obtain the corruption of electric automobile shell sheet material Erosion current potential (Ecorr) and corrosion electric current density (Icorr) numerical value, it is considered that the tendency of the highest sample etches of corrosion potential is the least, And the corrosion rate of corrosion electric current density the least expression sample is the least, corrosion resisting property is the best.Measure the electric automobile Shell Plate obtained Corrosion potential (the E of materialcorr) it is-545.8mV, the corrosion electric current density (I of electric automobile shell sheet materialcorr) it is 1.421 μ Acm-2, And untreated electric automobile shell is-1057mV, the corrosion electric current density (I of undressed electric automobile shellcorr) It is 4.303 μ Acm-2, it follows that the electric automobile shell sheet material corrosion resistance of the present invention is electronic compared to untreated Automobile case has promoted.
Embodiment two
Novel high-strength anticorrosive electric automobile shell, includes Mg0.6%, Si3.5%, Cu6.0%, Mn0.3% by weight percentage, Fe0.3%, Zr0.5%, Er0.5%, Cr0.02%, Ni0.02%, Ti0.2%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps: (1) heating furnace used in 320 times pre-hot smeltings and fine aluminium 1～2h；(2) the fine aluminium melting under a reduced pressure after preheating Temperature be the heating furnace of 750 DEG C is completely melt after add monocrystal silicon granule, add after monocrystal silicon particles fuse aluminum bronze intermediate alloy, Aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and a small amount of rare earth Element erbium, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add and close in the middle of aluminum titanium Gold is completely melt to aluminum titanium intermediate alloy, is cooled to 750 DEG C, skims, adds pure magnesium, is incubated 30～40min under conditions of vacuum； (4) adding tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE, the percentage by weight ratio that three adds is 8:1:3； (5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to having been warmed up to 300 DEG C of left sides Right crucible stands under conditions of 100MPa 2.5h, forms ingot casting；(7) in 550 DEG C after described ingot casting cuts into suitable dimension Under conditions of carry out the homogenizing annealing of 12 hours, stove is cooled to room temperature；(8) it is incubated 3 hours after described ingot casting is warming up to 420 DEG C, Carry out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) three passages are carried out after hot rolling Cold rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, and excited frequency is 14kHz, Aluminium alloy supersonic vibration pressurized extends, cold rolling after alloy carried out at 240 DEG C the annealing of 2～3 hours, obtain certain The aluminum alloy plate materials of thickness；(10) aluminum alloy plate materials is carried out halfhour solution treatment, then shrend at 540 DEG C；(11) Aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by mixed-powder C and V uniform application in aluminium alloy plate The surface of material, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified so that aluminum alloy sheet material surface While forming nanoscale impression, mixed-powder C and V is melted the surface being covered in aluminum alloy plate materials, processing procedure uses argon Gas is protected, and its laser process parameter area is: laser power 2.0kw, sweep speed 15mn/s, beam spot diameter, is 4mm. (13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, the octadecane being solute configuration 5mM with ethanol Base trichlorosilane solution, puts into the aluminium alloy obtained process 2min in hydrochloric acid solution, uses a large amount of deionized water rinsing after having processed Sample, to remove unnecessary hydrochloric acid, is positioned in octadecyl trichlorosilane alkane solution immersion 12h, preparation by aluminum alloy surface subsequently Sample at 80 DEG C be dried 30min；(14) punching press plastotype.
Tensile strength, yield strength, percentage elongation and the Brinell hardness of the electric automobile shell sheet material made be respectively 427.2MPa, 341.8MPa, 16%, 107HB.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell.
The ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and keep peak aging strengthening ability Mg2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add the Cu element of proper proportion, reduce nature The timeliness adverse effect to material property, forms Mg more tiny, more2Si phase (acicular beta " phase), avoid adding Cu simultaneously Electric automobile shell corrosion stability is reduced after element.Add trace Mn and Cr, disperse phase can be produced, suppress alloy recrystallization, improve Alloy strength, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds in electric automobile shell, Gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, accelerated ag(e)ing process can be reduced or eliminated, and And appropriate rare earth element cooperates with other elements and can effectively improve mechanical property and the corrosive nature of alloy.
Under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heater Interior pressure, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into gold Belong in liquation, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, additionally Noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters and adds Oxidized metal liquation in hot device.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell, uses the tension of the electric automobile shell of three kinds of fining modifiers simultaneously Intensity adds 7.234%, and yield strength adds 6.704%, percentage elongation add 20.0% and Brinell hardness add 10.758%.
Melted pouring metal melt, can to having been warmed up standing under conditions of 100MPa 2.5h to the crucible of about 300 DEG C Prevent from metal liquid process of setting is formed the ingot casting of open structure, thus affect the intensity of electric automobile shell sheet material, exist simultaneously Advantageously form the ingot casting of compact texture under conditions of high pressure, strengthen the intensity of electric automobile shell.
Electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, thus Reduce the frictional force impact on electric automobile shell plate surface, cold rolling, outside the electric automobile that supersonic vibration is cold rolling relative to static state Shell surface is more smooth, is conducive to carrying out the operation of next step.
By mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, use crossing current continuous wave Cq laser instrument to electricity It is modified that electrical automobile shell sheet material carries out laser treatment, can effectively make electric automobile shell plate surface form the same of nanoscale impression Time mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface forms nanometer The pit of level, increases the surface area of electric automobile shell sheet material, makes the octadecyl three of next step while improving frictional force Chlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro structure of different morphologies in electric automobile case surface, Self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface nature of electric automobile shell sheet material, And the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material antioxidation at high temperature Performance, changes the surface nature of electric automobile shell sheet material.
In order to measure electric automobile case surface produced film layer corrosion resisting property in saline solution, use Tafel curve and electrochemistry resistance Anti-spectrum evaluates the antiseptic property of thin film, and before carrying out electro-chemical test, all samples all soaks a period of time in NaCl solution, Electrochemical impedance spectroscopy and Plan Curve stably measure afterwards at open circuit point position (OCP), obtain the corruption of electric automobile shell sheet material Erosion current potential (Ecorr) and corrosion electric current density (Icorr) numerical value, it is considered that the tendency of the highest sample etches of corrosion potential is the least, And the corrosion rate of corrosion electric current density the least expression sample is the least, corrosion resisting property is the best.Measure the electric automobile Shell Plate obtained Corrosion potential (the E of materialcorr) it is-564.2mV, the corrosion electric current density (I of electric automobile shell sheet materialcorr) it is 1.145 μ Acm-2, And untreated electric automobile shell is-1057mV, the corrosion electric current density (I of undressed electric automobile shellcorr) It is 4.303 μ Acm-2, it follows that the electric automobile shell sheet material corrosion resistance of the present invention is electronic compared to untreated Automobile case has promoted.
Embodiment three
Novel high-strength anticorrosive electric automobile shell, includes Mg0.6%, Si2.0%, Cu5.0%, Mn0.25% by weight percentage, Fe0.25%, Zr0.3%, Er0.3%, Cr0.015%, Ni0.015%, Ti0.015%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps: (1) heating furnace used in pre-hot smelting at 330 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating melts under a reduced pressure Refine and add monocrystal silicon granule after the heating furnace that temperature is 750 DEG C is completely melt, add after monocrystal silicon particles fuse and close in the middle of aluminum bronze Gold, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and a small amount of Rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add in aluminum titanium Between alloy be completely melt to aluminum titanium intermediate alloy, be cooled to 750 DEG C, skim, add pure magnesium, under conditions of vacuum be incubated 30～ 40min；(4) adding tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE, the weight percent that three adds is frequently Example is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to having been warmed up To the crucibles of about 300 DEG C, under conditions of 100MPa, stand 3h, form ingot casting；(7) described ingot casting cuts into suitable dimension After under conditions of 550 DEG C, carry out the homogenizing annealing of 12 hours, stove is cooled to room temperature；(8) after described ingot casting is warming up to 420 DEG C It is incubated 3 hours, carries out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) hot rolling is laggard Three passages of row cold rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, exciting Frequency is 15kHz, and aluminium alloy supersonic vibration pressurized extends, cold rolling after alloy carried out at 240 DEG C the annealing of 2～3 hours Process, obtain certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out halfhour solution treatment at 540 DEG C, Then shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by equal for mixed-powder C and V The even surface being applied in aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified, makes Obtain and while aluminum alloy sheet material surface forms nanoscale impression, mixed-powder C and V melted the surface being covered in aluminum alloy plate materials, Using argon to protect in processing procedure, its laser process parameter area is: laser power 2.1kw, sweep speed 18mm/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
Tensile strength, yield strength, percentage elongation and the Brinell hardness of the electric automobile shell sheet material made be respectively 402.3MPa, 331.2MPa, 18%, 109HB.The ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and protect Hold the Mg of peak aging strengthening ability2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add proper proportion Cu element, reduce the natrual ageing adverse effect to material property, form Mg more tiny, more2Si phase (acicular beta " phase), Reduce electric automobile shell corrosion stability after avoiding adding Cu element simultaneously.Adding trace Mn and Cr, can produce disperse phase, suppression is closed Gold recrystallization, improves alloy strength, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds electricity In electrical automobile shell, gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, acceleration can be reduced or eliminated Ag(e)ing process, and appropriate rare earth element and other elements cooperate and can effectively improve mechanical property and the corrosion of alloy Performance.
Under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heater Interior pressure, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into gold Belong in liquation, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, additionally Noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters and adds Oxidized metal liquation in hot device.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell, uses the tension of the electric automobile shell of three kinds of fining modifiers simultaneously Intensity adds 8.126%, and yield strength adds 7.237%, percentage elongation add 22.0% and Brinell hardness add 11.594%.
Melted pouring metal melt, to having been warmed up standing under conditions of 100MPa 3h to the crucible of about 300 DEG C, can be prevented Metal liquid process of setting is only formed the ingot casting of open structure, thus affects the intensity of electric automobile shell sheet material, simultaneously at height Advantageously form the ingot casting of compact texture under conditions of pressure, strengthen the intensity of electric automobile shell.
Electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, thus Reduce the frictional force impact on electric automobile shell plate surface, cold rolling, outside the electric automobile that supersonic vibration is cold rolling relative to static state Shell surface is more smooth, is conducive to carrying out the operation of next step.
By mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, use crossing current continuous wave Cq laser instrument to electricity It is modified that electrical automobile shell sheet material carries out laser treatment, can effectively make electric automobile shell plate surface form the same of nanoscale impression Time mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface forms nanometer The pit of level, increases the surface area of electric automobile shell sheet material, makes the octadecyl three of next step while improving frictional force Chlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro structure of different morphologies in electric automobile case surface, Self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface nature of electric automobile shell sheet material, And the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material antioxidation at high temperature Performance, changes the surface nature of electric automobile shell sheet material.
In order to measure electric automobile case surface produced film layer corrosion resisting property in saline solution, use Tafel curve and electrochemistry resistance Anti-spectrum evaluates the antiseptic property of thin film, and before carrying out electro-chemical test, all samples all soaks a period of time in NaCl solution, Electrochemical impedance spectroscopy and Plan Curve stably measure afterwards at open circuit point position (OCP), obtain the corruption of electric automobile shell sheet material Erosion current potential (Ecorr) and corrosion electric current density (Icorr) numerical value, it is considered that the tendency of the highest sample etches of corrosion potential is the least, And the corrosion rate of corrosion electric current density the least expression sample is the least, corrosion resisting property is the best.Measure the electric automobile Shell Plate obtained Corrosion potential (the E of materialcorr) it is-627.1mV, the corrosion electric current density (I of electric automobile shell sheet materialcorr) it is 1.298 μ Acm-2, And untreated electric automobile shell is-1057mV, the corrosion electric current density (I of undressed electric automobile shellcorr) It is 4.303 μ Acm-2, it follows that the electric automobile shell sheet material corrosion resistance of the present invention is electronic compared to untreated Automobile case has promoted.
Embodiment four
Novel high-strength anticorrosive electric automobile shell, includes Mg0.3%, Si 2.5%, Cu4.5%, Mn0.25% by weight percentage, Fe0.2%, Zr0.2%, Er0.2%, Cr0.01%, Ni0.01%, Ti0.1%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps: (1) heating furnace used in pre-hot smelting at 340 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating melts under a reduced pressure Refine and add monocrystal silicon granule after the heating furnace that temperature is 750 DEG C is completely melt, add after monocrystal silicon particles fuse and close in the middle of aluminum bronze Gold, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and a small amount of Rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add in aluminum titanium Between alloy be completely melt to aluminum titanium intermediate alloy, be cooled to 750 DEG C, skim, add pure magnesium, under conditions of vacuum be incubated 30～ 40min；(4) adding tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE, the weight percent that three adds is frequently Example is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to having been warmed up To the crucibles of about 300 DEG C, under conditions of 100MPa, stand 3.5h, form ingot casting；(7) described ingot casting cuts into suitable chi Carrying out the homogenizing annealing of 12 hours after very little under conditions of 550 DEG C, stove is cooled to room temperature；(8) described ingot casting is warming up to 420 DEG C Rear insulation 3 hours, carries out the hot rolling of five passages, is incubated half an hour at 530 DEG C after each passage hot rolling is complete；(9) after hot rolling Carrying out the cold rolling of three passages, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, swashs Vibration frequency is 16kHz, and aluminium alloy supersonic vibration pressurized extends, cold rolling after alloy carried out at 240 DEG C 2～move back for 3 hours Fire processes, and obtains certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out halfhour solution treatment at 540 DEG C, Then shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by equal for mixed-powder C and V The even surface being applied in aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified, makes Obtain and while aluminum alloy sheet material surface forms nanoscale impression, mixed-powder C and V melted the surface being covered in aluminum alloy plate materials, Using argon to protect in processing procedure, its laser process parameter area is: laser power 2.3kw, sweep speed 19mn/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
Tensile strength, yield strength, percentage elongation and the Brinell hardness of the electric automobile shell sheet material made be respectively 412.3MPa, 311.6MPa, 21%, 110HB.The ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and protect Hold the Mg of peak aging strengthening ability2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add proper proportion Cu element, reduce the natrual ageing adverse effect to material property, form Mg more tiny, more2Si phase (acicular beta " phase), Reduce electric automobile shell corrosion stability after avoiding adding Cu element simultaneously.Adding trace Mn and Cr, can produce disperse phase, suppression is closed Gold recrystallization, improves alloy strength, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds electricity In electrical automobile shell, gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, acceleration can be reduced or eliminated Ag(e)ing process, and appropriate rare earth element and other elements cooperate and can effectively improve mechanical property and the corrosion of alloy Performance.
Under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heater Interior pressure, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into gold Belong in liquation, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, additionally Noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters and adds Oxidized metal liquation in hot device.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell, uses the tension of the electric automobile shell of three kinds of fining modifiers simultaneously Intensity adds 6.092%, and yield strength adds 5.124%, percentage elongation add 15.0% and Brinell hardness add 8.067%.
Melted pouring metal melt, can to having been warmed up standing under conditions of 100MPa 3.5h to the crucible of about 300 DEG C Prevent from metal liquid process of setting is formed the ingot casting of open structure, thus affect the intensity of electric automobile shell sheet material, exist simultaneously Advantageously form the ingot casting of compact texture under conditions of high pressure, strengthen the intensity of electric automobile shell.
Electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, thus Reduce the frictional force impact on electric automobile shell plate surface, cold rolling, outside the electric automobile that supersonic vibration is cold rolling relative to static state Shell surface is more smooth, is conducive to carrying out the operation of next step.
By mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, use crossing current continuous wave Cq laser instrument to electricity It is modified that electrical automobile shell sheet material carries out laser treatment, can effectively make electric automobile shell plate surface form the same of nanoscale impression Time mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface forms nanometer The pit of level, increases the surface area of electric automobile shell sheet material, makes the octadecyl three of next step while improving frictional force Chlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro structure of different morphologies in electric automobile case surface, Self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface nature of electric automobile shell sheet material, And the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material antioxidation at high temperature Performance, changes the surface nature of electric automobile shell sheet material.
In order to measure electric automobile case surface produced film layer corrosion resisting property in saline solution, use Tafel curve and electrochemistry resistance Anti-spectrum evaluates the antiseptic property of thin film, and before carrying out electro-chemical test, all samples all soaks a period of time in NaCl solution, Electrochemical impedance spectroscopy and Plan Curve stably measure afterwards at open circuit point position (OCP), obtain the corruption of electric automobile shell sheet material Erosion current potential (Ecorr) and corrosion electric current density (Icorr) numerical value, it is considered that the tendency of the highest sample etches of corrosion potential is the least, And the corrosion rate of corrosion electric current density the least expression sample is the least, corrosion resisting property is the best.Measure the electric automobile Shell Plate obtained Corrosion potential (the E of materialcorr) it is-603.2mV, the corrosion electric current density (I of electric automobile shell sheet materialcorr) it is 1.389 μ Acm-2, And untreated electric automobile shell is-1057mV, the corrosion electric current density (I of undressed electric automobile shellcorr) It is 4.303 μ Acm-2, it follows that the electric automobile shell sheet material corrosion resistance of the present invention is electronic compared to untreated Automobile case has promoted.
Embodiment five
Novel high-strength anticorrosive electric automobile shell, includes Mg0.5%, Si 2.0～3.5%, Cu5.0% by weight percentage, Mn0.25%, Fe0.3%, Zr0.4%, Er0.4%, Cr0.015%, Ni0.015%, Ti0.015%, Al surplus.
Novel high-strength anticorrosive electric automobile shell preparation method, described electric automobile shell is the shell being made up of following steps:
(1) heating furnace used in pre-hot smelting at 350 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating is at decompression state Lower smelting temperature be the heating furnace of 750 DEG C is completely melt after add monocrystal silicon granule, add in aluminum bronze after monocrystal silicon particles fuse Between alloy, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and A small amount of rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add aluminum Titanium intermediate alloy is completely melt to aluminum titanium intermediate alloy, is cooled to 750 DEG C, skims, and adds pure magnesium, protects under conditions of vacuum Temperature 30～40min；(4) tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE are added, the weight hundred that three adds Proportion by subtraction ratio is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to Preheated to the crucible of about 300 DEG C stands under conditions of 100MPa 4h, form ingot casting；(7) described ingot casting cuts into conjunction Carrying out the homogenizing annealing of 12 hours after suitable size under conditions of 550 DEG C, stove is cooled to room temperature；(8) described ingot casting is warming up to It is incubated 3 hours after 420 DEG C, carries out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) heat Carrying out the cold rolling of three passages after rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, Excited frequency is 18kHz, aluminium alloy supersonic vibration pressurized extends, cold rolling after alloy carried out at 240 DEG C 2～3 hours Annealing, obtains certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out at halfhour solid solution at 540 DEG C Reason, then shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by mixed-powder C and V Uniform application, in the surface of aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified, While making aluminum alloy sheet material surface form nanoscale impression, mixed-powder C and V is melted the surface being covered in aluminum alloy plate materials, Using argon to protect in processing procedure, its laser process parameter area is: laser power 2.5kw, sweep speed 20mm/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
Tensile strength, yield strength, percentage elongation and the Brinell hardness of the electric automobile shell sheet material made be respectively 395.5MPa, 329.1MPa, 21%, 111HB.The ratio of each element weight percent of Reasonable adjustment so that formed in electric automobile shell and protect Hold the Mg of peak aging strengthening ability2Si phase, increases its elongation percentage while strengthening electric automobile outer cover intensity.Add proper proportion Cu element, reduce the natrual ageing adverse effect to material property, form Mg more tiny, more2Si phase (acicular beta " phase), Reduce electric automobile shell corrosion stability after avoiding adding Cu element simultaneously.Adding trace Mn and Cr, can produce disperse phase, suppression is closed Gold recrystallization, improves alloy strength, increases Alloy Anti intercrystalline corrosion ability, improves alloy property.Appropriate rare earth element adds electricity In electrical automobile shell, gas in fusion-casting process and objectionable impurities, increase mobility, crystal grain thinning, acceleration can be reduced or eliminated Ag(e)ing process, and appropriate rare earth element and other elements cooperate and can effectively improve mechanical property and the corrosion of alloy Performance.
Under decompression state, melting electric automobile shell can be effectively reduced smelting temperature, saves resource.Simultaneously in order to keep heater Interior pressure, heater needs to pour into a certain amount of noble gas while discharging gas, and first noble gas is passed directly into gold Belong in liquation, form bubble, drive the impurity in molten metal to move up, jointly discharge with gas, go the removal of impurity, additionally Noble gas forces the harmful gas produced in fusion process to be discharged therewith, and the gas preventing oxygen etc. to have oxidizing property enters and adds Oxidized metal liquation in hot device.
Three kinds of fining modifiers have positive role to electric automobile shell, but have some limitations when being single use, as It is individually added into Sr and makees Metamorphism treatment, the tendency aggravation of alloy air-breathing, drop low-alloyed compactness, be easily formed serious columanar structure, Causing mechanical property to decline on the contrary, rare earth easily aoxidizes, and modification effect is held time short etc.；And the antidamping of Al-5Ti-B fining agent Performance is the most unsatisfactory, and is easily poisoned by Zr atom and lose the ability of crystal grain thinning, it is impossible to give full play to it each Advantage.And triplicity is used and can give full play to respective advantage while overcoming the defect itself having.By form Understanding, relative to single use fining modifier, the tension simultaneously using three kinds of fining modifiers can strengthen electric automobile shell is strong Degree, yield strength, percentage elongation and Brinell hardness, after wherein in table, data are interpolation fining modifier and without fining modifier The comparison in various performance indications of the rear electric automobile shell, uses the tension of the electric automobile shell of three kinds of fining modifiers simultaneously Intensity increases by 8.126%, and yield strength increases by 7.237%, and percentage elongation increase by 22.0%% and Brinell hardness add 11.594%.
Melted pouring metal melt, to having been warmed up standing under conditions of 100MPa 4h to the crucible of about 300 DEG C, can be prevented Metal liquid process of setting is only formed the ingot casting of open structure, thus affects the intensity of electric automobile shell sheet material, simultaneously at height Advantageously form the ingot casting of compact texture under conditions of pressure, strengthen the intensity of electric automobile shell.
Electric automobile shell supersonic vibration pressurized at the vibrating amplitude extends, and can reduce the frictional force being subject in the operation of rolling, thus Reduce the frictional force impact on electric automobile shell plate surface, cold rolling, outside the electric automobile that supersonic vibration is cold rolling relative to static state Shell surface is more smooth, is conducive to carrying out the operation of next step.
By mixed-powder C and V uniform application in the surface of electric automobile shell sheet material, use crossing current continuous wave Cq laser instrument to electricity It is modified that electrical automobile shell sheet material carries out laser treatment, can effectively make electric automobile shell plate surface form the same of nanoscale impression Time mixed-powder C and V melted the surface being covered in electric automobile shell sheet material, electric automobile shell plate surface forms nanometer The pit of level, increases the surface area of electric automobile shell sheet material, makes the octadecyl three of next step while improving frictional force Chlorosilane solution is easier to enter electric automobile shell plate surface, forms the micro structure of different morphologies in electric automobile case surface, Self assembly possesses the silane film of anticorrosion antiwear performance the most from the teeth outwards, thus changes the surface nature of electric automobile shell sheet material, And the C-V overlay film that electric automobile shell plate surface is formed can be effectively improved electric automobile shell sheet material antioxidation at high temperature Performance, changes the surface nature of electric automobile shell sheet material.
In order to measure electric automobile case surface produced film layer corrosion resisting property in saline solution, use Tafel curve and electrochemistry resistance Anti-spectrum evaluates the antiseptic property of thin film, and before carrying out electro-chemical test, all samples all soaks a period of time in NaCl solution, Electrochemical impedance spectroscopy and Plan Curve stably measure afterwards at open circuit point position (OCP), obtain the corruption of electric automobile shell sheet material Erosion current potential (Ecorr) and corrosion electric current density (Icorr) numerical value, it is considered that the tendency of the highest sample etches of corrosion potential is the least, And the corrosion rate of corrosion electric current density the least expression sample is the least, corrosion resisting property is the best.Measure the electric automobile Shell Plate obtained Corrosion potential (the E of materialcorr) it is-541.6mV, the corrosion electric current density (I of electric automobile shell sheet materialcorr) it is 1.385 μ Acm-2, And untreated electric automobile shell is-1057mV, the corrosion electric current density (I of undressed electric automobile shellcorr) It is 4.303 μ Acm-2, it follows that the electric automobile shell sheet material corrosion resistance of the present invention is electronic compared to untreated Automobile case has promoted.
Last it should be noted that, above example is only in order to illustrate technical scheme, rather than to scope Restriction, although having made to explain to the present invention with reference to preferred embodiment, it will be understood by those within the art that, Technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.

Claims (2)

1. novel high-strength anticorrosive electric automobile shell, it is characterised in that described electric automobile shell includes by weight percentage Mg0.2%, Si 2.0%, Cu4.0%, Mn0.2%, Fe0.2%, Zr0.1%, Er0.1%, Cr0.01%, Ni0.01%, Ti0.1%, Al surplus.
Novel high-strength the most according to claim 1 anticorrosive electric automobile shell, it is characterised in that described electric automobile shell Shell for being made up of following steps:
(1) heating furnace used in pre-hot smelting at 300 DEG C and fine aluminium 1～2h；(2) fine aluminium after preheating melts under a reduced pressure Refine and add monocrystal silicon granule after the heating furnace that temperature is 750 DEG C is completely melt, add after monocrystal silicon particles fuse and close in the middle of aluminum bronze Gold, aluminum manganese intermediate alloy, aluminium chromium hardener, aluminum nickel intermediate alloy, ferro-aluminum intermediate alloy, aluminium zirconium hardener and a small amount of Rare earth element er, and be incubated a period of time and be completely melt to intermediate alloy, after being sufficiently stirred for, heating furnace is heated up, add in aluminum titanium Between alloy be completely melt to aluminum titanium intermediate alloy, be cooled to 750 DEG C, skim, add pure magnesium, under conditions of vacuum be incubated 30～ 40min；(4) adding tri-kinds of metal fining modifiers of Al-5Ti-B, Al-lOSr and RE, the weight percent that three adds is frequently Example is 8:1:3；(5) add refining agent fully to react, degasification, slagging-off,；(6) melted pouring metal melt is to having been warmed up To the crucibles of about 300 DEG C, under conditions of 100MPa, stand 2h, form ingot casting；(7) described ingot casting cuts into suitable dimension After under conditions of 550 DEG C, carry out the homogenizing annealing of 12 hours, stove is cooled to room temperature；(8) after described ingot casting is warming up to 420 DEG C It is incubated 3 hours, carries out the hot rolling of five passages, after each passage hot rolling is complete, be incubated half an hour at 530 DEG C；(9) hot rolling is laggard Three passages of row cold rolling, aluminium alloy one end is relatively fixed and connects ultrasonic vibration apparatus, and the other end enters in milling train, exciting Frequency is 12kHz, and aluminium alloy supersonic vibration pressurized extends, cold rolling after alloy carried out at 240 DEG C 2 hours annealing treatment Reason, obtains certain thickness aluminum alloy plate materials；(10) aluminum alloy plate materials is carried out halfhour solution treatment at 540 DEG C, so Rear shrend；(11) aluminum alloy plate materials carries out the artificial aging of 5 hours at 180 DEG C；(12) by uniform for mixed-powder C and V It is applied in the surface of aluminum alloy plate materials, uses crossing current continuous wave Cq laser instrument that aluminum alloy plate materials carries out laser treatment modified so that While aluminum alloy sheet material surface formation nanoscale impression, mixed-powder C and V is melted the surface being covered in aluminum alloy plate materials, place Using argon to protect during reason, its laser process parameter area is: laser power 1.7kw, sweep speed 13mn/s, Beam spot diameter, is 4mm.(13) configuration hydrochloric acid volume is the hydrochloric acid solution of 2:1 with deionized water volume ratio, with ethanol as solute The octadecyl trichlorosilane alkane solution of configuration 5mM, puts into process 2min in hydrochloric acid solution by the aluminium alloy obtained, use after having processed Sample, to remove unnecessary hydrochloric acid, is positioned over octadecyl trichlorosilane alkane solution by a large amount of deionized water rinsing aluminum alloy surface subsequently Middle immersion 12h, the sample of preparation is dried 30min at 80 DEG C；(14) punching press plastotype.
CN201610217012.9A 2016-04-08 2016-04-08 Novel high-strength corrosion-resistant electric vehicle shell Pending CN105838948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610217012.9A CN105838948A (en) 2016-04-08 2016-04-08 Novel high-strength corrosion-resistant electric vehicle shell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610217012.9A CN105838948A (en) 2016-04-08 2016-04-08 Novel high-strength corrosion-resistant electric vehicle shell

Publications (1)

Publication Number Publication Date
CN105838948A true CN105838948A (en) 2016-08-10

Family

ID=56597041

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610217012.9A Pending CN105838948A (en) 2016-04-08 2016-04-08 Novel high-strength corrosion-resistant electric vehicle shell

Country Status (1)

Country Link
CN (1) CN105838948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109632461A (en) * 2018-10-25 2019-04-16 合肥河钢新材料科技有限公司 A kind of household electrical appliances Coil Coating Products aging resistance detection method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101765674A (en) * 2007-07-27 2010-06-30 爱尔康何纳吕公司 Extruded products in aluminium alloy al-mn with improved mechanical strength
CN102560312A (en) * 2010-12-16 2012-07-11 贵州华科铝材料工程技术研究有限公司 Seven-combination modified low-zinc aluminum alloy plating material for hot-dip plating and preparation method thereof
CN103273026A (en) * 2013-06-07 2013-09-04 中南大学 Multiple-energy-field asymmetric sunken type cast-rolling method for preparing aluminium alloy plates and strips for deep drawing
CN103993208A (en) * 2014-05-29 2014-08-20 合肥工业大学 Al-Mg-Si-Cu-Mn-Er alloy material and preparation method thereof
CN104928676A (en) * 2015-07-12 2015-09-23 北京工业大学 Preparation method for coating material for strengthening and repairing airplane landing gear

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101765674A (en) * 2007-07-27 2010-06-30 爱尔康何纳吕公司 Extruded products in aluminium alloy al-mn with improved mechanical strength
CN102560312A (en) * 2010-12-16 2012-07-11 贵州华科铝材料工程技术研究有限公司 Seven-combination modified low-zinc aluminum alloy plating material for hot-dip plating and preparation method thereof
CN103273026A (en) * 2013-06-07 2013-09-04 中南大学 Multiple-energy-field asymmetric sunken type cast-rolling method for preparing aluminium alloy plates and strips for deep drawing
CN103993208A (en) * 2014-05-29 2014-08-20 合肥工业大学 Al-Mg-Si-Cu-Mn-Er alloy material and preparation method thereof
CN104928676A (en) * 2015-07-12 2015-09-23 北京工业大学 Preparation method for coating material for strengthening and repairing airplane landing gear

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
曹凤国等: "《超声加工技术》", 31 August 2004, 化学工业出版社 *
李元元等: "《新型材料科学与技术 金属材料卷》", 30 September 2012, 华南理工大学出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109632461A (en) * 2018-10-25 2019-04-16 合肥河钢新材料科技有限公司 A kind of household electrical appliances Coil Coating Products aging resistance detection method
CN109632461B (en) * 2018-10-25 2021-05-11 合肥河钢新材料科技有限公司 Method for detecting anti-aging performance of household appliance color coated sheet

Similar Documents

Publication Publication Date Title
Cabrini et al. Effect of heat treatment on corrosion resistance of DMLS AlSi10Mg alloy
Singh et al. Laser surface engineering of magnesium alloys: a review
JP4187018B2 (en) Cast aluminum alloy with excellent relaxation resistance and heat treatment method
TW201925489A (en) Aluminum alloy sheet for battery lids for molding integrated explosion-prevention valve, and method for producing same
WO1993023581A2 (en) Corrosion resistant iron aluminides exhibiting improved mechanical properties and corrosion resistance
Wang et al. Corrosion behavior of single-and poly-crystalline dual-phase TiAl-Ti3Al alloy in NaCl solution
CN105803278A (en) Novel high-strength corrosion-resistant aluminum alloy door and window
CN110218917B (en) Alloy aluminum bar containing rare earth elements and preparation process thereof
CN105734371A (en) Novel high-strength corrosion-resistant aluminum alloy pipeline
Sathishkumar et al. Effect of Direct Aging on the Microstructure and Mechanical Behavior of AlSi10Mg Alloy: Casting Versus Selective Laser Melting
CN105671385A (en) Three-way check valve
CN105886864A (en) Novel high-strength anticorrosion aluminum alloy high-voltage vacuum power distribution cabinet
JP3286982B2 (en) Mold material
CN105838948A (en) Novel high-strength corrosion-resistant electric vehicle shell
CN105861895A (en) Novel high-strength corrosion-resistant building curtain wall framework
CN105803279A (en) Novel high-strength corrosion-resistant solar cell frame
CN105714167A (en) Novel high-strength and corrosion-resisting outer wall insulating decorative plate
CN105648292A (en) Novel high-strength anti-corrosion aluminum alloy safety guardrail
CN105624491A (en) Novel high-strength corrosion-resistant aluminum alloy video monitoring unit
CN105734370A (en) Novel high-strength corrosion-resistant data recorder
Kaiser CORROSION BEHAVIOUR OF Al-12Si-1Mg AUTOMOTIVE ALLOY IN ACIDIC, ALKALINE AND SALT MEDIA CONTAINING Zr TRACES.
CN105648293A (en) Novel high-strength anti-corrosion engine casing
Satishkumar et al. Investigation of mechanical, morphological studies and electrochemical micro holing process parameters on Al6061-SiC-Gr hybrid metal matrix composites
CN113403505A (en) Method for preparing battery cover plate explosion-proof sheet and turnover sheet by using 1-series aluminum alloy strip
CN105838949A (en) Novel high-strength corrosion-resistant electrical connector element

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160810

RJ01 Rejection of invention patent application after publication