CN107058837B - A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof - Google Patents

A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof Download PDF

Info

Publication number
CN107058837B
CN107058837B CN201710411200.XA CN201710411200A CN107058837B CN 107058837 B CN107058837 B CN 107058837B CN 201710411200 A CN201710411200 A CN 201710411200A CN 107058837 B CN107058837 B CN 107058837B
Authority
CN
China
Prior art keywords
magnesium
alloy
tin
aluminium
silver
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.)
Active
Application number
CN201710411200.XA
Other languages
Chinese (zh)
Other versions
CN107058837A (en
Inventor
黄雪飞
黄维刚
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.)
Sichuan University
Original Assignee
Sichuan University
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 Sichuan University filed Critical Sichuan University
Priority to CN201710411200.XA priority Critical patent/CN107058837B/en
Publication of CN107058837A publication Critical patent/CN107058837A/en
Application granted granted Critical
Publication of CN107058837B publication Critical patent/CN107058837B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C23/00Alloys based on magnesium
    • C22C23/02Alloys based on magnesium with aluminium as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C23/00Alloys based on magnesium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002Changing 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/06Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon

Abstract

The present invention relates to a kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof, the component of the alloy is made of magnesium, tin, aluminium, silver-colored four kinds of elements;The mass percent of each component is:Tin:4~6%, aluminium:4~6%, silver-colored:0.5~2%, remaining is magnesium.The alloy preparation method includes three melting, homogenization and solution heat treatment, aging strengthening model steps.The solute atoms of super saturated solid solution carries out complex intensifying in precipitated phase and matrix that alloy structure of the present invention is precipitated by transgranular even dispersion, and it is simple to strengthen with obvious effects and preparation process.Transgranular matrix hardness can reach 76HV to alloy of the present invention when timeliness peak value at 160 DEG C, and 1000 hours Vickers hardnesses of timeliness remain at 67HV or so, and high temperature microstructure is stablized, and has certain commercial potential.

Description

A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof
Technical field
The invention belongs to structural metallic materials and preparing technical field, especially a kind of precipitated phase of transgranular Dispersed precipitate with The high intensity multiple elements design magnesium tin aluminium silver alloy and its melting and heat treatment process that atom is strengthened jointly are dissolved in matrix.
Background technology
Magnesium alloy is as most light structural metallic materials, in aerospace, communications and transportation, war industry and electronic manufacture etc. There is huge application prospect in field.The especially light-weighted active demand of traffic in recent years tool, to expand the work of magnesium alloy Cheng Yingyong, the exploitation of ingredient and the optimization for preparing processing technology become one of the main hot spot of current research.Try to close in magnesium Golden broader applications have become a weight for developing magnesium alloy in the world in the related components of the vehicles or spacecraft Want target.The current main weakness of magnesium alloy is that its intensity also has a certain distance, while heat-resisting quantity compared to aluminium alloy It can be poor.The method of reinforced magnesium alloy is broadly divided into precipitation strength, solution strengthening, refined crystalline strengthening, processing hardening and is closed to magnesium The second special phase is added in gold(Such as quasi-crystalline substance, ceramic particle)Form the means such as the composite material of dispersion-strengtherning.Wherein fine grain Strengthen the main method acquisition using grain refiner is added in casting process or to alloy progress severe plastic deformation.Addition The ability that the means of grain refiner improve intensity is limited, and is not necessarily suitable all magnesium alloys;And acutely plasticity becomes Large-sized component cannot be made due to being limited by equipment in the method for shape, and its cost is higher.Processing hardening and prepare magnesium Based composites are often also required to relatively high cost.In comparison, precipitation strength and solution strengthening are that cost is relatively low and right Most magnesium alloys are all suitable for, most widely used alloy strengthening means.For example, common magnesium alloy system, magnesium-zinc alloy system, magnesium Tin alloy system and magnesium-rare earth alloy system can obtain apparent reinforcing effect by the second phase precipitates.However, excessively While emphasizing precipitation strength effect, few people pay attention to carrying out using the method that precipitation strength and solution strengthening are combined compound Strengthen.
The magnesium alloy system of people's exploitation in recent years, majority then are added other a small amount of based on a kind of alloying element Microalloy element is as third, the 4th constituent element etc..Magnalium(Mg-Al)Alloy system is current most widely used alloy system, but by In the discontinuous precipitation phase Mg that the alloy is formed in crystal boundary17Al12Fusing point is low, at high temperature(More than 135 DEG C)Easy to produce crystal boundary It being slid with boundary, thermodynamics tissue is unstable and causes Creep Properties poor, thus can be used only in the occasion of lower temperature, This strongly limits the applications of Mg-Al alloys.Magnesium tin(Mg-Sn)Alloy system is a kind of alloy system developed in recent years, magnesium tin two The eutectic temperature of first alloy is 561 DEG C, and plays the compound Mg of invigoration effect2Sn fusing points are 770.5 DEG C, these are all apparent high In the corresponding temperature of magnalium system, show it with good high temperature application potential.A small amount of micro- conjunction is added in Mg-7Sn alloys The elements such as gold element such as Ag, Cu can significantly improve the density and the spread of its precipitated phase, to improve its precipitation strength effect Fruit.But, Sn contents are higher in these alloys, and the reduction of loss of weight and cost to magnesium alloy is unfavorable.
Invention content
The purpose of the present invention is to overcome tin in existing alloy especially magnesium tin alloy(Sn)Content is higher and reinforcing side The relatively simple disadvantage of formula provides a kind of high-strength multiple elements design magnesium tin aluminium silver alloy and preparation method thereof.By adding in magnesium Add the appropriate and comparable Sn elements of quantity and Al elements, makes the precipitation by being dissolved and the alloy of timeliness contains transgranular Dispersed precipitate A large amount of super saturated solid solution atom mutually and in matrix, to the complex intensifying effect for obtaining precipitation strength and solution strengthening is combined Fruit.A small amount of silver is added in the alloy simultaneously(Ag)Element further enhances precipitation strength effect, obtains strengthening with good Effect and heat resistance, and the magnesium alloy with lower cost.
The component of the high intensity multiple elements design magnesium alloy is made of magnesium, tin, aluminium, silver-colored four kinds of elements;The matter of each component content Measuring percentage is:
Tin (Sn):4~6%
Aluminium (Al):4~6%
Silver-colored (Ag):0.5~2%
Remaining is magnesium (Mg);
The preparation method of the high intensity multiple elements design magnesium tin aluminium silver alloy, including melting, homogenization and solution heat treatment, Aging strengthening model;Specifically include following steps:
Step 1:Melting
By following component and mass percentage content dispensing:Tin (Sn):4~6%, aluminium (Al):4~6%, silver-colored (Ag):0.5 ~2%, remaining is magnesium (Mg);The purity of each component is more than 99.9% in raw material, be sequentially placed into crucible pure magnesium, pure tin, Fine aluminium, fine silver, are heated to 800~850 DEG C, and stirring stands 10~20 minutes into alloy liquid, alloy liquid is poured into casting With formation magnesium tin aluminium silver alloy blank in metal cold mold;
Step 2:Homogenization and solution heat treatment
Magnesium tin aluminium silver alloy blank is put into conventional resistive stove, step heating is carried out under air or vacuum atmosphere:First 10~20 hours are kept the temperature at 320 DEG C~360 DEG C, is then to slowly warm up to 440~460 DEG C again, keeps the temperature 24~36 hours, then heat up To 470~480 DEG C, 2 hours are kept the temperature, last cold water quenches the magnesium tin aluminium silver solid solution alloy homogenized;
Step 3:Aging strengthening model
The magnesium tin aluminium silver solid solution alloy of homogenization is subjected to aging strengthening model in conventional resistive stove under air atmosphere, is heated Temperature is 150~250 DEG C, and soaking time is 50~400 hours, and cold water quenches to obtain high intensity multiple elements design reinforcing magnesium tin aluminium silver Alloy.
Compared with prior art, the present invention having the following advantages that:
1, magnesium tin aluminium silver alloy of the invention has good intensity, alloy be dissolved and 160 DEG C of aging treatment process under, For alloy Vickers hardness up to 76HV, 1000 hours hardness of timeliness remains at 67HV or so when timeliness peak value, and high temperature microstructure is stablized, Intensity and high temperature resistance are good, have certain commercial potential.
2, relative to previous Mg-Sn and Mg-Al alloy systems, this multiple elements design magnesium tin aluminium silver alloy proposed by the present invention The advantages of being characterized in that, having had both Mg-Al alloy high strengths and Mg-Sn alloy high thermal stabilities, at the same with cost compared with Low Al element substitutions part Sn elements suitably reduce the cost of Mg-Sn alloys, thus the application of the market with bigger is latent Power.
Specific implementation mode
A kind of high intensity multiple elements design magnesium tin aluminium silver alloy provided by the invention is done furtherly by following examples It is bright.It should be noted that described herein, specific examples are only used to explain the present invention but is not used in the restriction present invention.
Embodiment 1:The component of magnesium tin aluminium silver alloy is made of magnesium, tin, aluminium and silver-colored four kinds of elements;The quality of each component content Percentage is:
Tin (Sn):6%
Aluminium (Al):6%
Silver-colored (Ag):0.5%
Remaining is magnesium (Mg).
The preparation method of the present embodiment includes the following steps:
Step 1:Melting
(1)By following component raw material and mass percentage content dispensing:6% tin, 6% aluminium, 0.5% silver medal, remaining is magnesium base Material;In raw material then prepared dispensing is put more than 99.9% and is preheated to 150 DEG C in an oven, together by the purity of each component When will account for the RJ-2 covertures of prepared magnesium tin aluminium silver alloy total weight 2% and be put into baking oven and toast;By casting mold another 300 DEG C are preheated in outer batch-type furnace;
(2)When heating crucible is to 300 DEG C, 1/2 or so the coverture toasted is added in crucible bottom, then will be preheated Magnesium blank be put into crucible;
(3)After magnesium blank melts and crucible temperature stablizes at 800 DEG C, preheating is sequentially added from high to low according to fusing point Remaining various dispensing, then melt be stirred about 15 minutes;During this, the remaining covering toasted is added as one sees fit Agent, it is non-ignitable to be subject to surface;
(4)Crucible temperature is stablized after 800 DEG C, and melt stands 15 minutes, by percent by volume, in 99%CO2+ 1%SF6 Slag is drawn under mixed gas protected;
(5)After drawing slag, crucible temperature is maintained to stablize at 800 DEG C, by percent by volume, in 99%CO2+ 1%SF6It is mixed It closes and is cast into magnesium tin aluminium silver alloy blank under gas shield;
Step 2:Homogenization and solution heat treatment
Magnesium tin aluminium silver alloy blank is put into conventional resistive stove, is heated in air atmosphere, it is small that 20 are kept the temperature at 320 DEG C When, it is then to slowly warm up to 440 DEG C again, keeps the temperature 36 hours, then be warming up to 470 DEG C, keeps the temperature 2 hours, then cold water quenches to obtain The magnesium tin aluminium silver solid solution alloy of homogenization;
Step 3:Aging strengthening model
The magnesium tin aluminium silver solid solution alloy of homogenization is subjected to aging strengthening model, timeliness in conventional resistive stove under air atmosphere The temperature used in the process is 150 DEG C, and soaking time is 300 hours, and cold water quenches to obtain the magnesium tin aluminium silver alloy of ageing strengthening.
Embodiment 2:The component of magnesium tin aluminium silver alloy is made of magnesium, tin, aluminium, silver-colored four kinds of elements;The quality of each component content Percentage is:
Tin (Sn):4%
Aluminium (Al):4%
Silver-colored (Ag):2%
Remaining is magnesium (Mg).
The preparation method of the present embodiment includes the following steps:
Step 1:Melting
(1)By following component and mass percentage content dispensing:4% tin, 4% aluminium, 2% silver medal, remaining is magnesium blank;Raw material Then prepared dispensing is put more than 99.9% and is preheated to 150 DEG C in an oven, while will account for institute by the purity of middle each component The RJ-2 covertures for preparing magnesium tin aluminium silver alloy total weight 2% are put into baking oven and toast;By casting mold other box 300 DEG C are preheated in stove;
(2)When heating crucible is to 300 DEG C, 1/2 or so the coverture toasted is added in crucible bottom, then will be preheated Magnesium blank be put into crucible;
(3)After pure magnesium melts and crucible temperature stablizes at 850 DEG C, preheating is sequentially added according to fusing point from high to low Various other dispensings, then melt be stirred about 15 minutes;During this, the remaining coverture toasted is added as one sees fit, It is non-ignitable to be subject to surface;
(4)Crucible temperature is stablized after 850 DEG C, and melt stands 10 minutes, by percent by volume, in 99%CO2+ 1%SF6 Slag is drawn under mixed gas protected;
(5)After drawing slag, crucible temperature is maintained to stablize at 850 DEG C, by percent by volume, in 99%CO2+ 1%SF6It is mixed It closes and is cast into magnesium tin aluminium silver alloy blank under gas shield;
Step 2:Homogenization and solution heat treatment
Magnesium tin aluminium silver alloy blank is put into conventional resistive stove, is heated in air atmosphere, it is small that 10 are kept the temperature at 360 DEG C When, it is then to slowly warm up to 460 DEG C again, keeps the temperature 24 hours, then be warming up to 480 DEG C, keeps the temperature 2 hours, then cold water quenches to obtain The magnesium tin aluminium silver solid solution alloy of homogenization;
Step 3:Aging strengthening model
The magnesium tin aluminium silver solid solution alloy of homogenization is subjected to aging strengthening model, timeliness in conventional resistive stove under air atmosphere The temperature used in the process is 250 DEG C, and soaking time is 50 hours, and cold water quenches to obtain the magnesium tin aluminium silver alloy of ageing strengthening.
The magnesium tin aluminium silver alloy obtained by above example, containing on transgranular matrix even dispersion be distributed precipitated phase and The solute atoms of super saturated solid solution in matrix, transgranular matrix hardness can reach 76HV when timeliness peak value at 160 DEG C, and it is long when Between timeliness hardness be not remarkably decreased.Alloy strength is high, tissue, performance better heat stability and excellent with certain cost Gesture has good commercial potential.

Claims (1)

1. a kind of high intensity multiple elements design magnesium tin aluminium silver alloy, which is characterized in that the component of the alloy is by magnesium, tin, aluminium, four kinds of silver Element forms;The mass percent of each component content is:
Tin (Sn):4~6%
Aluminium (Al):4~6%
Silver-colored (Ag):0.5~2%
Remaining is magnesium (Mg);
The preparation method of the high intensity multiple elements design magnesium tin aluminium silver alloy, including melting, homogenization and solution heat treatment, timeliness Heat treatment;Specifically include following steps:
Step 1:Melting
By following component and mass percentage content dispensing:Tin (Sn):4~6%, aluminium (Al):4~6%, silver-colored (Ag):0.5~ 2%, remaining is magnesium (Mg);The purity of each component is more than 99.9% in raw material, and pure magnesium, fine silver, pure is sequentially placed into crucible Aluminium, pure tin, are heated to 800-850 DEG C, and stirring stands 10-20 minutes into alloy liquid, alloy liquid is poured into casting gold Belong to and forms magnesium tin aluminium silver alloy blank in cold mold;
Step 2:Homogenization and solution heat treatment
Magnesium tin aluminium silver alloy blank is put into conventional resistive stove, step heating is carried out under air or vacuum atmosphere:First 320 DEG C~360 DEG C keep the temperature 10~20 hours, be then to slowly warm up to 440~460 DEG C again, keep the temperature 24~36 hours, then be warming up to 470 ~480 DEG C, 2 hours are kept the temperature, last cold water quenches the magnesium tin aluminium silver solid solution alloy homogenized;
Step 3:Aging strengthening model
The magnesium tin aluminium silver solid solution alloy of homogenization is subjected to aging strengthening model, heating temperature in conventional resistive stove under air atmosphere It it is 150~250 DEG C, soaking time is 50~400 hours, and cold water quenches to obtain high intensity multiple elements design magnesium tin aluminium silver alloy.
CN201710411200.XA 2017-06-05 2017-06-05 A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof Active CN107058837B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710411200.XA CN107058837B (en) 2017-06-05 2017-06-05 A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710411200.XA CN107058837B (en) 2017-06-05 2017-06-05 A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof

Publications (2)

Publication Number Publication Date
CN107058837A CN107058837A (en) 2017-08-18
CN107058837B true CN107058837B (en) 2018-10-02

Family

ID=59615877

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710411200.XA Active CN107058837B (en) 2017-06-05 2017-06-05 A kind of high intensity multiple elements design magnesium tin aluminium silver alloy and preparation method thereof

Country Status (1)

Country Link
CN (1) CN107058837B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB477721A (en) * 1936-10-16 1938-01-05 High Duty Alloys Ltd Improvements in and relating to magnesium base alloys
CN102358929B (en) * 2011-10-19 2013-04-03 清华大学 Heatproof magnesium sannum silver alloy and preparation method thereof
CN103114231B (en) * 2013-03-07 2015-03-11 重庆大学 Mg-Sn-Al wrought magnesium alloy and preparation method thereof
CN103602865B (en) * 2013-12-02 2015-06-17 四川大学 Copper-containing heat-resistant magnesium-tin alloy and preparation method thereof

Also Published As

Publication number Publication date
CN107058837A (en) 2017-08-18

Similar Documents

Publication Publication Date Title
CN103834834B (en) Anode-oxidable high-performance die-casting aluminum alloy and preparation method thereof
CN1244711C (en) Hypereutectoid alpax with eutectic structure and technological method thereof
CN1203200C (en) Al-Zn-Mg-Er rare earth aluminium alloy
CN104946940B (en) A kind of pack alloy and preparation method thereof
CN102796976B (en) Staged homogenization heat treatment method for improving microstructure and performances of Zr-containing 7xxx aluminum alloy
CN101624670B (en) High-strength high-elongation ratio aluminum alloy and preparation method thereof
WO2015169163A1 (en) Aluminum alloy and method of preparing the same
WO2016015488A1 (en) Aluminum alloy and preparation method therefor and application thereof
CN100577835C (en) Method for preparing high-silicon aluminum alloy
CN104561690B (en) High-plasticity cast aluminum alloy and extrusion casting preparation method thereof
CN104233033B (en) A kind of high-strength and high ductility magnesium base alloy and preparation method thereof
CN103205614A (en) Novel 6063 aluminum alloy material and its production technology
CN100439533C (en) Aluminium-silicon-copper-magnesium series deforming alloy and its preparing method
CN100467647C (en) High-strength heat-proof compression casting magnesium alloy and preparation method thereof
WO2011035652A1 (en) High-strength heat-proof aluminum alloy material containing lithium and rare earth and producing method thereof
CN101914709B (en) Preparation method of high-toughness casting aluminum alloy
CN104004949B (en) The preparation method of a kind of high strength magnesium lithium alloy
CN101509088B (en) High-strength, high-ductility rare earth aluminum alloy material and method of producing the same
CN101979692B (en) Preparation process of Al-Zn-Mg-Cu aluminum alloy with ultra-high strength
CN104630578B (en) High plasticity alloy cast aluminum and its gravitational casting preparation method
CN103122431B (en) Preparation method for magnesium-lithium alloy with enhanced long-period structure phase
CN102409213B (en) Preparation method of high-strength magnesium alloy enhanced by heat treatment
CN1546708A (en) Aluminum silicon alloy series possessing granulated silicon phase and its process
CN104561691B (en) High-plasticity cast aluminum alloy and pressure casting preparation method thereof
CN104745902A (en) High strength Al-Mg-Si-Cu alloy for bicycles and processing technology thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant