CN110157965A - A kind of free machining aluminium copper extruded bars and preparation method thereof - Google Patents
A kind of free machining aluminium copper extruded bars and preparation method thereof Download PDFInfo
- Publication number
- CN110157965A CN110157965A CN201910550945.3A CN201910550945A CN110157965A CN 110157965 A CN110157965 A CN 110157965A CN 201910550945 A CN201910550945 A CN 201910550945A CN 110157965 A CN110157965 A CN 110157965A
- Authority
- CN
- China
- Prior art keywords
- aluminium copper
- aluminium
- extruded bars
- alloy
- temperature
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- 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
- 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
- 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
- C22F1/04—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Conductive Materials (AREA)
- Continuous Casting (AREA)
Abstract
The present invention provides a kind of free machining aluminium copper extruded bars and preparation method thereof, aluminium copper extruded bars are by following mass percent at being grouped as: Cu 3.5~4.5%, Mg 0.6~0.9%, Mn 0.6~1.0%, Cr 0.4~0.6%, Ce 0.15~0.25%, B 0.06~0.1%, Ti 0.01~0.02%, C 0.0004~0.0008%, Sn 0.8~1.2%, Bi 0.3~0.5%, Fe≤0.2%, Si≤0.1%, surplus is Al and other impurity elements, preparation method successively includes ingredient, melting aluminium copper liquid, spray refining degasification cleans in furnace, online crystal grain refinement, online degassing and filtration, semi-continuous casting , casting rod homogenization, heating squeeze, press quenching and artificial aging processing.Aluminium copper extruded bars of the present invention are free of heavy metal element lead, meet environmental requirement, with good mechanical property and excellent machinability, chip is easily broken, non-stick knife, does not twine knife, is conducive to the production efficiency, the surface smoothness of product and the dimensional accuracy that improve machining.
Description
Technical field
The invention belongs to technical field of aluminium alloy preparation, be specifically related to a kind of free machining aluminium copper extruded bars and
Preparation method.
Background technique
Easy-cutting aluminum alloy typically refers to easily broken chip, non-stick knife, does not twine knife, the convenient aluminium alloy of chip removal.Cutting free aluminium
Alloy can carry out machining using the depth of cut of higher speed or bigger, thus can significantly improve machining
Production efficiency, and obtain the accurate aluminum alloy spare part that surface smoothness is good, dimensional accuracy is high.
Existing easy-cutting aluminum alloy mainly passes through the cutting ability that addition low-melting-point metal member usually improves aluminium alloy, in aluminium
During alloy high-speed cutting processing, due to frictional heat generation enable aluminum alloy to chip temperature increase, when with cutter contact point attachment
Aluminum Alloy Chip temperature when being close to or up to the fusing point of low-melting-point metal element and its constituent, these low-melting-point metal elements
And its softening or fusing occur for constituent, Aluminum Alloy Chip is broken, and reaches that chip non-stick knife, not twine knife, chip removal convenient
Effect.
Aluminium copper is the aluminium alloy using copper as main alloy element, belongs to heat-treatable strengthened aluminium alloy, is had strong
Degree height, feature with high hardness, are widely used in the fields such as electronic apparatus, communications and transportation, mechanized equipment, aerospace, weaponry,
Such as transmission valve, charge valve, wheel hub, piston, inducer, wheel disc, pulley, the components such as bearing, rivet, bolt, screw rod.These
Numerous aluminium copper components are usually all by obtaining to aluminium copper extruded bars by a large amount of machining, such as
Vehicle, milling, plane, drilling, tapping etc., thus require aluminium copper extruded bars that there is excellent machinability.
With the development of economy and society, existing free machining aluminium copper extruded bars are in the production and use process still
It has the following problems:
(1) existing free machining aluminium copper extruded bars generally contain lead element, such as 2005,2007,2011,2030 boards
Number Cutting free aluminium copper, and lead is virose heavy metal element, to human body and the harmful contamination of environment.With people
Improvement of living standard and environmental protection consciousness enhancing, leaded Cutting free aluminium copper gradually starts to forbid by various countries
It produces and sells and uses.Many countries have been provided with stringent technical barrier, Europe to the product of the harmful substances such as leaded in the world
Forbid selling ten major class such as electric equipment products containing 6 kinds of harmful substances such as lead, cadmium, mercury, including household electrical appliances, communication in allied city field
Electronic and electrical equipment.Therefore, there is an urgent need to develop unleaded Cutting free aluminium copper extruded bars.
(2) existing easily to cut with the universal and application of the High Speed NC Machine Tools such as numerically controlled lathe, CNC milling machine, numerical control drilling machine
The cutting ability for the aluminium copper extruded bars cut has been increasingly difficult to meet the requirement of the high-speed cutting processing of numerically-controlled machine tool, urgently
Need to develop the superior aluminium copper extruded bars of cutting ability.
(3) existing free machining aluminium copper extruded bars generally there is also low strength, high-temperature brittleness is big, corrosion resistance
Can be poor the problems such as.
Therefore, existing Cutting free aluminium copper extruded bars and preparation method thereof still have much room for improvement and develop.
Summary of the invention
There are problem and shortage for above-mentioned, and the purpose of the present invention is to provide a kind of free machining aluminium copper extruded rods
Material and preparation method thereof improves aluminium copper extruded bars by optimization design aluminium copper at being grouped as and extrusion process
Cutting ability, intensity and high temperature resistant and corrosion resistance.
The technical scheme of the present invention is realized as follows:
The present invention provides a kind of free machining aluminium copper extruded bars, its main feature is that the aluminium copper extruded bars by with
Lower mass percent at being grouped as: Cu 3.5~4.5%, Mg 0.6~0.9%, Mn 0.6~1.0%, Cr 0.4~
0.6%, Ce 0.15~0.25%, B 0.06~0.1%, Ti 0.01~0.02%, C 0.0004~0.0008%, Sn 0.8
~1.2%, Bi 0.3~0.5%, Fe≤0.2%, Si≤0.1%, surplus are Al and other impurity elements, other impurity elements
Single content≤0.05%, total amount≤0.15%.
Wherein, Cu is the main intensified element of aluminium copper extruded bars of the present invention, existing solution strengthening effect, moreover it is possible to
Al forms CuAl2Hardening constituent significantly increases the intensity of aluminium copper extruded bars.Cu content is too low, aluminium copper extruded bars
Intensity is insufficient, and Cu content is too high, and the hot cracking tendency of aluminium copper extruded bars is big, and corrosion resistance is deteriorated, in addition, the price of Cu
Higher, Cu content is too high, can also dramatically increase the production cost of aluminium copper extruded bars.Comprehensive aluminium copper extruded bars
Performance requirement and production cost factor, therefore, Cu content selection 3.5~4.5%.
Solid solubility of the Mg in aluminium copper extruded bars is larger, can improve aluminium copper extruded bars by solution strengthening
Intensity.Mg and Si also will form Mg2The intensity of Si hardening constituent enhancing aluminium copper extruded bars.Mg content is higher, and aluminum bronze closes
The intensity of golden extruded bars is also higher, but Mg content is too high, can also reduce the plasticity of aluminium copper extruded bars.Therefore, Mg contains
Amount is selected as 0.6~0.9%.
Mn and Cr belongs to transition element, and inventor has found after studying through a large number of experiments, at the same compound addition Mn and
Cr, part Mn, Cr can be directly dissolved first into aluminum substrate, are increased the binding force between aluminium atom, are slowed down diffusing through for aluminium atom
The decomposition rate of journey and solid solution improves the thermal stability under aluminum substrate high temperature.Secondly, can also be formed between Mn, Cr and Al
MnAl6、CrAl7And MnCrAl12A variety of dispersion strengthening phases are simultaneously distributed on aluminum substrate and crystal boundary, and crystal boundary, sub boundary is hindered to move
Shifting and dislocation motion increase the resistance of dislocation motion in aluminum substrate, hinder the rheology of crystal boundary under high temperature, significantly improve aluminium copper
The recrystallization temperature and high-temperature stability of extruded bars.Mn, Cr content are too low, do not have effect, and Mn, Cr content are too high, and hold
Coarse intermetallic compound is easily formed, the mechanical property of aluminium copper is deteriorated.Therefore, Mn content is selected as 0.6~1.0%,
Cr content is selected as 0.4~0.6%.
Effect of the Ce in aluminium copper extruded bars is mainly the coarse needle-shaped Fe-riched phase of fine degenerate.Due to impurity element
Fe is in aluminium copper usually with coarse needle-shaped FeAl3、FeSiAl3It is present in aluminum bronze etc. coarse acicular beta-Fe Fe-riched phase form to close
In auri body, these coarse acicular beta-Fe Fe-riched phases are hard crisp phase, can seriously isolate aluminium copper matrix, become aluminium copper hair
The formation of crack and direction of crack propagation of raw fracture, endanger the intensity and plasticity of aluminium copper extruded bars.In addition, these acicular betas-
Fe Fe-riched phase can also form micro- galvanic corrosion with aluminum substrate, reduce the corrosion resistance of aluminium copper extruded bars.Inventor couple
This problem is found after carrying out many experiments exploratory development, 0.15~0.25% rare earth element ce is added, due to the chemistry of Ce
Activity is stronger, can be adsorbed on FeAl in alloy graining process3、FeSiAl3The growth front of equal Fe-riched phases, inhibits β-Fe richness iron
Phase presses acicular growth, and coarse acicular beta-Fe Fe-riched phase can finally be made to be changed into the graininess α-Fe Fe-riched phase of fine uniform, and
Dispersed precipitate eliminates coarse acicular beta-Fe Fe-riched phase to aluminium copper extruded bars intensity, plasticity and corrosion resistant inside aluminum substrate
The harm of corrosion energy, improves intensity, plasticity and the corrosion resistance of aluminium copper extruded bars.In addition, Ce can also be formed with Al
Thermodynamically stable CeAl4It is mutually distributed on crystal boundary, prevents crystallization sliding, the rheology of crystal boundary under high temperature is hindered, to improve aluminium
The high-temperature stability of copper alloy extruded bars.Therefore, the Ce of selection addition 0.15~0.25%.
Sn and Bi belongs to low melting point element, and the fusing point of Sn is 231.9 DEG C, and the fusing point of Bi is 271.3 DEG C, and main function is to mention
The cutting ability of high aluminium copper extruded bars.Inventor after lot of experiments by having found, compound addition Sn, Bi low melting point
There is element, when it is 0.3~0.5% that Sn content, which is 0.8~1.2%, Bi content, it is low lower than 200 DEG C of Sn+Bi to can get fusing point
Melting eutectic tissue significantly improves the cutting ability of aluminium copper extruded bars, obtains aluminium copper extruded bars excellent
Cutting ability.
B element main function is refinement and nodularization Sn+Bi low melting point eutectic tissue.Inventor studies through a large number of experiments
After find, Sn+Bi low melting point eutectic group is woven in aluminium copper extruded bars usually in coarse continuous net-shaped distribution, can reduce aluminium
The cutting ability of copper alloy extruded bars.B is surface active element, can be adsorbed on the crystal boundary of Sn+Bi eutectic structure, refinement and
Nodularization Sn+Bi eutectic structure makes Sn+Bi eutectic structure be changed into tiny graininess and spherical, and on Dispersed precipitate aluminum substrate,
To improve the cutting ability of aluminium copper extruded bars.B content is too low, does not have effect, but also should not be too high, and therefore, B contains
Amount is selected as 0.06~0.1%.
Ti and C is added in aluminium copper liquid online in the form of AlTi5C0.2 alloy wire, and main function is that refinement is brilliant
Grain improves structural homogenity, improves the intensity and plasticity of aluminium copper extruded bars.Traditional AlTiB alloy grain fining agent
When encountering Mn, Cr transition element in aluminium copper liquid, understands " being poisoned " and lose grain refining effect.Inventor passes through big
It being found after the experimental study of amount, AlTi5C0.2 alloy grain fining agent has an immunization to " the poisoning " of Mn, Cr, addition 0.2~
0.4% AlTi5C0.2 alloy wire, in aluminium copper extruded bars containing 0.01~0.02% Ti and 0.0004~
Aluminium copper can be refined as the equiax crystal of fine uniform, significantly improve the structural homogenity of aluminium copper by 0.0008% C,
Improve the intensity and plasticity of aluminium copper extruded bars.
Fe, Si are the major impurity elements in aluminium copper extruded bars.Fe, Si are inevitable impurity members in aluminium ingot
The aluminum content of element, aluminium ingot is higher, i.e., purity is higher, and the impurity elements such as contained Fe, Si are also lower, final aluminium copper extruded rod
The impurity contents such as Fe, Si in material are also lower, more advantageously ensure that the performance of aluminium copper extruded bars.But aluminium ingot is pure
Degree is higher, and price is also more expensive, can dramatically increase the production cost of aluminium copper extruded bars.Select the aluminium of aluminium content >=99.7%
Ingot, it is ensured that Impurity Fe≤0.2%, Si≤0.1% in aluminium copper extruded bars, other impurity elements individually contain
Amount≤0.05%, total amount≤0.15%.Comprehensively consider the performance requirement and production cost factor of aluminium copper extruded bars, preferably
The aluminium ingot that aluminium content is 99.7%.
The preparation method of Cutting free aluminium copper extruded bars of the present invention, its main feature is that the following steps are included:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, aluminium ingot, magnesium ingot, tin slab, bismuth are selected
Ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy, aluminum-boron alloy and Al-Ti-C alloy silk are that raw material are matched
Material；
S002: aluminium ingot being heated and is melted, and magnesium ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminium chromium is then added and closes
Gold, aluminium cerium alloy and aluminum-boron alloy, stirring are fused into aluminium copper liquid；
S003: spray refining degasification removal of impurities processing is carried out to aluminium copper liquid using inert gas and refining agent, after skimming
A period of time is stood again；
S004: importing chute for aluminium copper liquid, and Al-Ti-C alloy silk is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through into the getter being arranged on chute and foamed ceramic filter plate carries out online
Degassing and filtration processing；
S006: by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: carrying out two-step homogenization processing for aluminium copper casting rod, and then water mist pressure is cooled to room temperature；
S008: aluminium copper extruded bars will be squeezed into after the heating of aluminium copper casting rod, then by aluminium copper extruded rod
Material water mist is cooled to room temperature；
S009: aluminium copper extruded bars are subjected to two-stage time effect processing, after cooling to room temperature with the furnace, are obtained free machining
Aluminium copper extruded bars.
Preferably, in the step S001, aluminium content >=99.7% of aluminium ingot, content of magnesium >=99.95% of magnesium ingot, tin slab
Theil indices >=99.99%, bi content >=99.99% of bismuth ingot, aluminium copper is AlCu50, and alumal is AlMn10, aluminium
Evanohm is AlCr10, and aluminium cerium alloy is AlCe5, and aluminum-boron alloy is AlB3, and Al-Ti-C alloy silk is AlTi5C0.2.
It is that aluminium ingot is placed in furnace bottom in the stove of permanent magnetism agitating apparatus by aluminium ingot heating fusing in the step S002
Heating fusing, and aluminium copper liquid is fused under permanent magnetic stirring effect, fusion temperature is 750~760 DEG C.
Since the density of Sn, Bi are larger, the specific gravity in aluminium copper liquid is larger, and segregation easy to form manually stirs one
As be all difficult to prevent the segregation of Sn, Bi.Therefore, the segregation of Sn, Bi in order to prevent, preferably furnace bottom are carried out with permanent magnetic stirring stove
Melting.
In the step S003, inert gas is the nitrogen or argon gas of purity >=99.99%, and the dosage of refining agent accounts for original
The 0.2~0.4% of material total weight, the time of spray refining are 8~12 minutes, and the time of standing is 40~50 minutes.
Nitrogen and argon gas are all inert gases, and spray refining is ok using nitrogen or argon gas in furnace, the effect of degasification removal of impurities
Fruit is the same, but in order to guarantee degasification impurity-eliminating effect, and the purity of nitrogen or argon gas is necessary >=and 99.99%.
In the step S004, the additional amount of Al-Ti-C alloy silk accounts for the 0.2~0.4% of raw material total weight.
In the step S005, the graphite rotator rotation speed of getter is 445~455 revs/min, inert nitrogen gas
Or the flow of argon gas is 0.8~1.2 cube m/h, the porosity of foamed ceramic filter plate is 30~40ppi.
Stomata and be mingled be aluminium copper common deficiency, these defects are also the formation of crack and rotten of aluminium copper fracture
The starting point of erosion can reduce the mechanical property and corrosion resistance of aluminium copper.In order to improve the cleanliness of aluminium copper, inventor
By being found after lot of experiments, on the basis of aluminium copper liquid carries out spray refining degasification removal of impurities in furnace, then by aluminum bronze
Aluminium alloy flows successively through the getter being arranged on chute and foamed ceramic filter plate carries out online degassing and filtration processing, can depth
Aluminium copper liquid is purified, the aluminium copper of high-cleanness, high is obtained, it is ensured that aluminium copper obtains enough mechanical property and corrosion-resistant
Performance.
In the step S006, the casting temperature of semi-continuous casting is 690~700 DEG C, and casting speed is 90~100 millis
M/min, cooling water pressure is 0.6~0.8MPa.
Since the specific gravity of Sn, Bi are larger, the segregation easy to form of when casting.The segregation of Sn, Bi in order to prevent, invention is by anti-
Retrial is tested grope after find, casting temperature is 690~700 DEG C, casting speed is 90~100 mm/mins and cooling water pressure
Power carries out semi-continuous casting under the conditions of being 0.6~0.8MPa, can effectively prevent the segregation of Sn, Bi, and it is equally distributed to obtain Sn, Bi
Aluminium copper casting rod.
Preferably, in the step S007, two-step homogenization processing is that aluminium copper casting rod is first heated to 410~420
It DEG C heat preservation 2~3 hours, then continues to be warming up to 440~450 DEG C and keeps the temperature 3~4 hours.
The purpose of Homogenization Treatments is to eliminate the macro microsegregation of the elements such as Cu, Mg, Mn, Cr inside aluminium copper casting rod,
Melt coarse InterMetallic Compound sufficiently as far as possible.Inventor passes through the Homogenization Treatments work to aluminium copper casting rod of the present invention
Skill carries out many experiments and gropes after studying to find, using two-step homogenization treatment process, aluminium copper casting rod is first heated to 410
~420 DEG C keep the temperature 2~3 hours, then continue to be warming up to 440~450 DEG C of heat preservations 3~4 hours, then water mist pressure is cooled to room
Temperature can eliminate the macro microsegregation of the elements such as Cu, Mg, Mn, Cr inside aluminium copper casting rod, fill coarse InterMetallic Compound
Divide and melt, it is ensured that the quality of aluminium copper casting rod.
In the step S008, the heating temperature of aluminium copper casting rod is 460~470 DEG C, and the temperature of extrusion die is 410
~420 DEG C, the temperature of extrusion cylinder is 400~410 DEG C, and extrusion speed is 8~9 ms/min, and extrusion ratio is 10~20.
Extrusion process parameters not only will have a direct impact on extrusion process and production efficiency, also affect aluminium copper extruded rod
The inside of material and surface quality.Extrusion process parameters are mainly embodied by influencing the thermal balance of aluminium copper extrusion process, aluminium
The temperature of copper alloy casting rod, extrusion die and extruding barrel is too low or extrusion speed is too fast or extrusion ratio is too big, and cooperation is not
Rationally, it is too big to will lead to deformation tension, can not be successfully and squeeze out aluminium copper bar, temperature is too high or extrusion ratio is too small, again
Internal and excellent surface quality aluminium copper bar can not be obtained, and the too slow then production efficiency of extrusion speed is too low.Inventor
It is 460~470 DEG C in the heating temperature of aluminium copper casting rod by being found after many experiments exploratory development, the temperature of extrusion die
Degree is 410~420 DEG C, and the temperature of extrusion cylinder is 400~410 DEG C, and extrusion speed is 8~9 ms/min, and extrusion ratio is 10~20
Under the conditions of, it can get internal and excellent surface quality aluminium copper extruded bars.
In the step S009, two-stage time effect processing is that aluminium copper extruded bars are first heated to 125~135 DEG C of heat preservations
It 5~6 hours, then proceedes to be warming up to 150~160 DEG C of heat preservations 2~3 hours.
Aging technique will have a direct impact on CuAl2、Mg2Form, size and the distribution of Si hardening constituent, and then influence aluminum bronze and close
Intensity, plasticity and the corrosion resistance of golden extruded bars.Inventor to the aging techniques of aluminium copper extruded bars of the present invention into
Found after row system research, using two-stage time effect process, by aluminium copper extruded bars be first heated to 125~135 DEG C of heat preservations 5~
It 6 hours, then proceedes to be warming up to 150~160 DEG C of heat preservations 2~3 hours, aluminium copper extruded bars are strong required for can get
Degree, plasticity and corrosion resistance.
Compared with prior art, the invention has the following advantages:
(1) Cutting free aluminium copper extruded bars provided by the invention contain only Sn and Bi low melting point element, are free of lead, no
Harm and contamination can be brought to human health and ecological environment, belong to environmentally protective Cutting free aluminium copper extruded rod
Material；
(2) present invention makes Sn, Bi low melting point eutectic by optimization design low-melting-point metal element S n, Bi at being grouped as
Phase even dispersion is distributed in aluminum substrate, significantly improves the cutting ability of aluminium copper extruded bars, when high-speed cutting processing, cuts
It considers easily broken, non-stick knife to be worth doing, twine knife, chip removal conveniently；
(3) present invention forms a variety of dispersoid particles and is distributed in aluminum substrate, hinder crystal boundary, Asia by compound addition Mn and Cr
The migration and dislocation motion of crystal boundary, prevent high temperature under crystal boundary rheology, improve aluminium copper extruded bars recrystallization temperature and
High-temperature stability；
(4) present invention is handled by fine degenerate, and coarse acicular beta-Fe Fe-riched phase is made to be changed into the particle of fine uniform
On shape and Dispersed precipitate aluminum substrate, influence of the coarse acicular beta-Fe Fe-riched phase to intensity and corrosion resistance is eliminated, is improved
The intensity and corrosion resistance of aluminium copper extruded bars；
(5) present invention passes through founding, homogenization, extruding and the aging technique parameter of optimization design aluminium copper, improves aluminium
The cleanliness and structural constituent uniformity of copper alloy, further improve the intensity, cutting ability, height of aluminium copper extruded bars
Temperature stability and corrosion resistance；
(6) the room temperature tensile intensity of Cutting free aluminium copper extruded bars of the present invention is greater than 480MPa, and elongation after fracture is big
Tensile strength under 14%, 150 DEG C of high temperature is greater than 400MPa, and elongation after fracture is greater than 16%, when high-speed cutting processing, chip
Easily broken, non-stick knife does not twine knife, chip removal conveniently, has excellent cutting ability and high-temperature stability and corrosion resistance.
Detailed description of the invention
Fig. 1 is the process flow chart of Cutting free aluminium copper extruded bars preparation method of the present invention.
Fig. 2 is that the vehicle of 1 aluminium copper extruded bars of embodiment considers shape appearance figure to be worth doing.
Fig. 3 is that the vehicle of 2 aluminium copper extruded bars of embodiment considers shape appearance figure to be worth doing.
Fig. 4 is that the vehicle of 3 aluminium copper extruded bars of embodiment considers shape appearance figure to be worth doing.
Fig. 5 is that the vehicle of 1 aluminium copper extruded bars of comparative example considers shape appearance figure to be worth doing.
Fig. 6 is that the vehicle of 2 aluminium copper extruded bars of comparative example considers shape appearance figure to be worth doing.
Fig. 7 is that the vehicle of 3 aluminium copper extruded bars of comparative example considers shape appearance figure to be worth doing.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, as follows in conjunction with drawings and embodiments and
Invention is further described in detail for comparative example.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1
A kind of free machining aluminium copper extruded bars, by following mass percent at being grouped as: Cu 4.1%, Mg
0.8%, Mn 0.9%, Cr 0.5%, Ce 0.2%, B 0.08%, Ti 0.015%, C 0.0006%, Sn 1.1%, Bi
0.4%, Fe≤0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single contents of impurity element≤
0.05%, total amount≤0.15%；
Preparation method is as shown in Figure 1, comprising the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 755 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% nitrogen and account for 0.3% refining agent of raw material total weight to aluminium copper liquid
Spray refining degasification removal of impurities in 10 minutes processing is carried out, stands 45 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 450 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 0.9 cube m/h are 35ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 695 DEG C, casting speed is 95 mm/mins, cooling water pressure is
Under the conditions of 0.7MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: aluminium copper casting rod is first heated to 415 DEG C and keeps the temperature 2.5 hours, then continues to be warming up to 445 DEG C of heat preservations
Progress two-step homogenization processing in 3.5 hours, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 465 DEG C, the temperature of extrusion die is 415 DEG C, extrusion cylinder
Under the conditions of for 405 DEG C, extrusion speed be 8.5 ms/min, extrusion ratio is 15, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by pressure bar material；
S009: aluminium copper extruded bars are first heated to 130 DEG C and keep the temperature 5.5 hours, then proceed to be warming up to 155 DEG C of guarantors
Warm progress two-stage time effect processing in 2.5 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
Embodiment 2
A kind of free machining aluminium copper extruded bars, by following mass percent at being grouped as: Cu 3.5%, Mg
0.9%, Mn 0.6%, Cr 0.6%, Ce 0.25%, B 0.06%, Ti 0.01%, C 0.0004%, Sn 1.2%, Bi
0.3%, Fe≤0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single contents of impurity element≤
0.05%, total amount≤0.15%；
Preparation method includes the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 760 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% argon gas and account for 0.4% refining agent of raw material total weight to aluminium copper liquid
Spray refining degasification removal of impurities in 8 minutes processing is carried out, stands 50 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 455 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 0.8 cube m/h are 30ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 700 DEG C, casting speed is 90 mm/mins, cooling water pressure is
Under the conditions of 0.8MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: being first heated to 420 DEG C for aluminium copper casting rod and keep the temperature 2 hours, and it is small to then continue to be warming up to 440 DEG C of heat preservations 4
The processing of Shi Jinhang two-step homogenization, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 460 DEG C, the temperature of extrusion die is 420 DEG C, extrusion cylinder
Under the conditions of for 410 DEG C, extrusion speed be 8 ms/min, extrusion ratio is 20, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by bar；
S009: aluminium copper extruded bars are first heated to 135 DEG C and keep the temperature 5 hours, then proceed to be warming up to 150 DEG C of heat preservations
Progress two-stage time effect processing in 3 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
Embodiment 3
A kind of free machining aluminium copper extruded bars, by following mass percent at being grouped as: Cu 4.5%, Mg
0.6%, Mn 1.0%, Cr 0.4%, Ce 0.15%, B 0.1%, Ti 0.02%, C 0.0008%, Sn 0.8%, Bi
0.5%, Fe≤0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single contents of impurity element≤
0.05%, total amount≤0.15%；
Preparation method includes the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 750 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% nitrogen or argon gas and account for 0.2% refining agent of raw material total weight to aluminum bronze
Aluminium alloy carries out spray refining degasification removal of impurities in 12 minutes processing, stands 40 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 445 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 1.2 cubes ms/h are 40ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 690 DEG C, casting speed is 100 mm/mins, cooling water pressure
Under the conditions of 0.6MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: being first heated to 410 DEG C for aluminium copper casting rod and keep the temperature 3 hours, and it is small to then continue to be warming up to 450 DEG C of heat preservations 3
The processing of Shi Jinhang two-step homogenization, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 470 DEG C, the temperature of extrusion die is 410 DEG C, extrusion cylinder
Under the conditions of for 400 DEG C, extrusion speed be 9 ms/min, extrusion ratio is 10, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by bar；
S009: aluminium copper extruded bars are first heated to 125 DEG C and keep the temperature 6 hours, then proceed to be warming up to 160 DEG C of heat preservations
Progress two-stage time effect processing in 2 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
Comparative example 1
A kind of aluminium copper extruded bars, by following mass percent at being grouped as: Cu 4.1%, Mg 0.8%, Mn
0.9%, Cr 0.5%, Ce 0.2%, B 0.08%, Ti 0.015%, C 0.0006%, Sn 0.5%, Bi 0.4%, Fe≤
0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single content≤0.05% of impurity element, total amount≤
0.15%；
Preparation method includes the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 755 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% nitrogen and account for 0.3% refining agent of raw material total weight to aluminium copper liquid
Spray refining degasification removal of impurities in 10 minutes processing is carried out, stands 45 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 450 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 0.9 cube m/h are 35ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 695 DEG C, casting speed is 95 mm/mins, cooling water pressure is
Under the conditions of 0.7MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: aluminium copper casting rod is first heated to 415 DEG C and keeps the temperature 2.5 hours, then continues to be warming up to 445 DEG C of heat preservations
Progress two-step homogenization processing in 3.5 hours, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 465 DEG C, the temperature of extrusion die is 415 DEG C, extrusion cylinder
Under the conditions of for 405 DEG C, extrusion speed be 8.5 ms/min, extrusion ratio is 15, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by pressure bar material；
S009: aluminium copper extruded bars are first heated to 130 DEG C and keep the temperature 5.5 hours, then proceed to be warming up to 155 DEG C of guarantors
Warm progress two-stage time effect processing in 2.5 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
Comparative example 2
A kind of aluminium copper extruded bars, by following mass percent at being grouped as: Cu 3.5%, Mg 0.9%, Mn
0.6%, Cr 0.6%, Ce 0.25%, B 0.03%, Ti 0.01%, C 0.0004%, Sn 1.2%, Bi 0.3%, Fe≤
0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single content≤0.05% of impurity element, total amount≤
0.15%；
Preparation method includes the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 760 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% argon gas and account for 0.4% refining agent of raw material total weight to aluminium copper liquid
Spray refining degasification removal of impurities in 8 minutes processing is carried out, stands 50 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 455 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 0.8 cube m/h are 30ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 700 DEG C, casting speed is 90 mm/mins, cooling water pressure is
Under the conditions of 0.8MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: being first heated to 420 DEG C for aluminium copper casting rod and keep the temperature 2 hours, and it is small to then continue to be warming up to 440 DEG C of heat preservations 4
The processing of Shi Jinhang two-step homogenization, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 460 DEG C, the temperature of extrusion die is 420 DEG C, extrusion cylinder
Under the conditions of for 410 DEG C, extrusion speed be 8 ms/min, extrusion ratio is 20, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by bar；
S009: aluminium copper extruded bars are first heated to 135 DEG C and keep the temperature 5 hours, then proceed to be warming up to 150 DEG C of heat preservations
Progress two-stage time effect processing in 3 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
Comparative example 3
A kind of aluminium copper extruded bars, by following mass percent at being grouped as: Cu 4.5%, Mg 0.6%, Mn
1.0%, Cr 0.4%, Ce 0.05%, B 0.1%, Ti 0.02%, C 0.0008%, Sn 0.8%, Bi 0.5%, Fe≤
0.2%, Si≤0.1%, surplus be Al and other impurity elements, other single content≤0.05% of impurity element, total amount≤
0.15%；
Preparation method includes the following steps:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, the aluminium of aluminium content 99.7% is selected
Ingot, the magnesium ingot of content of magnesium 99.95%, the tin slab of Theil indices 99.99%, the bismuth ingot of bi content 99.99%, AlCu50 alloy,
AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are that raw material carry out ingredient；
S002: aluminium ingot is placed in furnace bottom with melting in the stove of permanent magnetism agitating apparatus in 750 DEG C of heating, magnesium is then added
Ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium cerium alloy and aluminum-boron alloy melt under permanent magnetic stirring effect
It is melted into aluminium copper liquid；
S003: using purity 99.99% nitrogen or argon gas and account for 0.2% refining agent of raw material total weight to aluminum bronze
Aluminium alloy carries out spray refining degasification removal of impurities in 12 minutes processing, stands 40 minutes after skimming again；
S004: importing chute for aluminium copper liquid, and AlTi5C0.2 alloy wire is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through, graphite rotator rotation speed is set on chute for 445 revs/min, nitrogen
The foamed ceramic filter plate that the getter and porosity that throughput is 1.2 cubes ms/h are 40ppi carries out online degassing and filtration
Processing；
S006: the casting temperature of semi-continuous casting is 690 DEG C, casting speed is 100 mm/mins, cooling water pressure
Under the conditions of 0.6MPa, by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: being first heated to 410 DEG C for aluminium copper casting rod and keep the temperature 3 hours, and it is small to then continue to be warming up to 450 DEG C of heat preservations 3
The processing of Shi Jinhang two-step homogenization, then water mist pressure are cooled to room temperature；
S008: in the temperature that aluminium copper casting rod heating temperature is 470 DEG C, the temperature of extrusion die is 410 DEG C, extrusion cylinder
Under the conditions of for 400 DEG C, extrusion speed be 9 ms/min, extrusion ratio is 10, aluminium copper casting rod is squeezed into aluminium copper and is squeezed
Then aluminium copper extruded bars water mist is cooled to room temperature by bar；
S009: aluminium copper extruded bars are first heated to 125 DEG C and keep the temperature 6 hours, then proceed to be warming up to 160 DEG C of heat preservations
Progress two-stage time effect processing in 2 hours, after cooling to room temperature with the furnace, obtains the aluminium copper extruded bars.
By standard GB/T/T16865-2013 " deformation aluminium, magnesium and its alloy fabricated product tension test sample and side
Method ", the aluminium copper extruded bars of Examples 1 to 3 and comparative example 1~3 are processed into standard tensile specimen, in INSTRON-
25 DEG C of room temperatures and 150 DEG C of drawing by high temperature are carried out on 200 type electronic tensile test machines, rate of extension is 2 mm/mins, detects aluminium
The room temperature and Testing Tensile Strength at Elevated Temperature and elongation after fracture of copper alloy extruded bars, testing result difference are as shown in table 1.
The room temperature and drawing by high temperature mechanical property of 1 embodiment and comparative example aluminium copper extruded bars of table
In order to examine embodiment and comparative example aluminium copper extruded bars cutting ability, respectively in Examples 1 to 3 and
It is sampled on the aluminium copper extruded bars of comparative example 1~3, high-speed turning test, cutter material is carried out on CTN3500 type lathe
For YG8 hard alloy, Tool advance amount is 0.5 millimeter, and revolving speed is 3000 revs/min, is evaluated by the pattern of observation vehicle bits
The cutting ability of aluminium copper extruded bars, Fig. 2~4 are respectively that the vehicle of Examples 1 to 3 aluminium copper extruded bars considers pattern to be worth doing,
Fig. 5~7 are respectively that the vehicle of 1~3 aluminium copper extruded bars of comparative example considers pattern to be worth doing.
From table 1, it can be seen that, the room temperature tensile intensity of the aluminium copper extruded bars of the embodiment of the present invention is greater than 480MPa, breaks
Elongation is greater than 14% afterwards, and the tensile strength of aluminium copper extruded bars is greater than 400MPa under 150 DEG C of high temperature, and elongation after fracture is big
In 16%.From Fig. 2~4, it can be seen that, the vehicle bits of the aluminium copper extruded bars of the embodiment of the present invention 1~3 are tiny, uniform, have no
The vehicle of strip is considered to be worth doing, shows that aluminium copper extruded bars of the present invention have an excellent machinability, when high-speed cutting processing, is cut
It considers to be worth doing easily broken.
It can be seen from Fig. 5 and Fig. 6, the aluminium copper extruded bars of comparative example 1 are since Sn content is lower than 0.8%, comparative example 2
Aluminium copper extruded bars be lower than 0.06% due to B content, the vehicles of aluminium copper extruded bars bits are in long strip, show to compare
The machinability of the aluminium copper extruded bars of example 1 and comparative example 2 is poor, and when high-speed cutting processing, chip is not easily broken.From
Table 1 can be seen, and since Ce content is lower than 0.15%, room temperature tensile intensity is lower than the aluminium copper extruded bars of comparative example 3
480MPa, elongation after fracture are lower than 14%, and the tensile strength under 150 DEG C of high temperature is lower than 400MPa, and elongation after fracture is lower than 16%.
The comparison with comparative example aluminium copper extruded bars can see through the foregoing embodiment, and the present invention is set by optimization
Meter Sn, Bi at be grouped as, coarse needle-shaped richness Fe phase is carried out fine degenerate processing and add B element to Sn+Bi eutectic structure
Refinement spheroidising is carried out, the intensity, cutting ability and high temperature resistance of aluminium copper can be significantly improved, and the present invention is easily cut
Aluminium copper is cut without heavy metal elements such as lead, belongs to environmentally protective Cutting free aluminium copper.
Claims (10)
1. a kind of free machining aluminium copper extruded bars, it is characterised in that: the aluminium copper extruded bars are by following quality
Percentage at being grouped as: Cu 3.5~4.5%, Mg 0.6~0.9%, Mn 0.6~1.0%, Cr 0.4~0.6%, Ce
0.15~0.25%, B 0.06~0.1%, Ti 0.01~0.02%, C 0.0004~0.0008%, Sn 0.8~1.2%,
Bi 0.3~0.5%, Fe≤0.2%, Si≤0.1%, surplus are Al and other impurity elements, other single contents of impurity element
≤ 0.05%, total amount≤0.15%.
2. a kind of preparation method of Cutting free aluminium copper extruded bars according to claim 1, it is characterised in that: the system
Preparation Method the following steps are included:
S001: according to aluminium copper extruded bars at being grouped as and mass percent, select aluminium ingot, magnesium ingot, tin slab, bismuth ingot,
Aluminium copper, alumal, aluminum chromium, aluminium cerium alloy, aluminum-boron alloy and Al-Ti-C alloy silk are that raw material carry out ingredient；
S002: aluminium ingot being heated and is melted, and magnesium ingot, tin slab, bismuth ingot, aluminium copper, alumal, aluminum chromium, aluminium is then added
Cerium alloy and aluminum-boron alloy, stirring are fused into aluminium copper liquid；
S003: carrying out spray refining degasification removal of impurities processing to aluminium copper liquid using inert gas and refining agent, quiet again after skimming
Set a period of time；
S004: importing chute for aluminium copper liquid, and Al-Ti-C alloy silk is then added and carries out online refinement processing；
S005: aluminium copper liquid is flowed successively through into the getter being arranged on chute and foamed ceramic filter plate carries out online degasification
Filtration treatment；
S006: by the semi-continuous casting of aluminium copper liquid at aluminium copper casting rod；
S007: carrying out two-step homogenization processing for aluminium copper casting rod, and then water mist pressure is cooled to room temperature；
S008: aluminium copper extruded bars will be squeezed into after the heating of aluminium copper casting rod, then by aluminium copper extruded bars water
Mist is cooled to room temperature；
S009: aluminium copper extruded bars are subjected to two-stage time effect processing, after cooling to room temperature with the furnace, obtain free machining aluminum bronze
Alloy extrusion bar.
3. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S001, aluminium content >=99.7% of aluminium ingot, content of magnesium >=99.95% of magnesium ingot, Theil indices >=99.99% of tin slab, bismuth ingot
Bi content >=99.99%, aluminium copper is AlCu50, and alumal is AlMn10, and aluminum chromium is AlCr10, aluminium cerium alloy
It is AlCe5, aluminum-boron alloy is AlB3, and Al-Ti-C alloy silk is AlTi5C0.2.
4. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
It is that aluminium ingot is placed in furnace bottom to melt with heating in the stove of permanent magnetism agitating apparatus by aluminium ingot heating fusing, and forever in S002
Aluminium copper liquid is fused under magnetic stirring action, fusion temperature is 750~760 DEG C.
5. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S003, inert gas is the nitrogen or argon gas of purity >=99.99%；The dosage of refining agent accounts for the 0.2 of raw material total weight
~0.4%；The time of spray refining is 8~12 minutes, and the time of standing is 40~50 minutes.
6. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S005, the graphite rotator rotation speed of getter is 445~455 revs/min, and the flow of inert nitrogen gas or argon gas is
0.8~1.2 cube m/h, the porosity of foamed ceramic filter plate is 30~40ppi.
7. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S006, the casting temperature of semi-continuous casting is 690~700 DEG C, and casting speed is 90~100 mm/mins, cooling water pressure
For 0.6~0.8MPa.
8. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S007, two-step homogenization processing is that aluminium copper casting rod is first heated to 410~420 DEG C to keep the temperature 2~3 hours, is then continued to
It is warming up to 440~450 DEG C and keeps the temperature 3~4 hours.
9. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: above-mentioned steps
In S008, the heating temperature of aluminium copper casting rod is 460~470 DEG C, and the temperature of extrusion die is 410~420 DEG C, extrusion cylinder
Temperature is 400~410 DEG C, and extrusion speed is 8~9 ms/min, and extrusion ratio is 10~20.
10. the preparation method of Cutting free aluminium copper extruded bars according to claim 2, it is characterised in that: the step
In S009, two-stage time effect processing be aluminium copper extruded bars are first heated to 125~135 DEG C keep the temperature 5~6 hours, then after
It is continuous to be warming up to 150~160 DEG C of heat preservations 2~3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910550945.3A CN110157965B (en) | 2019-06-24 | 2019-06-24 | Free-cutting aluminum-copper alloy extrusion bar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910550945.3A CN110157965B (en) | 2019-06-24 | 2019-06-24 | Free-cutting aluminum-copper alloy extrusion bar and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110157965A true CN110157965A (en) | 2019-08-23 |
| CN110157965B CN110157965B (en) | 2020-07-28 |
Family
ID=67626728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910550945.3A Active CN110157965B (en) | 2019-06-24 | 2019-06-24 | Free-cutting aluminum-copper alloy extrusion bar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110157965B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394601A (en) * | 2020-03-25 | 2020-07-10 | 广东领胜新材料科技有限公司 | Casting method of large-size lead-free-cutting aluminum alloy cast rod |
| CN112195380A (en) * | 2020-10-14 | 2021-01-08 | 佛山市深达美特种铝合金有限公司 | Extruded aluminum alloy for oilless bearing and preparation method thereof |
| CN112553549A (en) * | 2020-12-03 | 2021-03-26 | 广东领胜新材料科技有限公司 | Homogenization treatment method for large-diameter free-cutting aluminum alloy cast rod |
| CN112813365A (en) * | 2020-12-29 | 2021-05-18 | 淮安和通汽车零部件有限公司 | Method for processing aluminum alloy section for automobile exterior trim |
| CN113578997A (en) * | 2021-08-03 | 2021-11-02 | 南京超明精密合金材料有限公司 | Processing technology of super free-cutting precision alloy rod and wire |
| CN114293077A (en) * | 2021-12-29 | 2022-04-08 | 北京理工大学 | High-strength aluminum-copper alloy for aerospace structural member and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63140060A (en) * | 1986-12-02 | 1988-06-11 | Furukawa Alum Co Ltd | Free-cutting aluminum-alloy casting and its production |
| US5863359A (en) * | 1995-06-09 | 1999-01-26 | Aluminum Company Of America | Aluminum alloy products suited for commercial jet aircraft wing members |
| EP1281781A1 (en) * | 2001-07-30 | 2003-02-05 | Alcoa Inc. | Alloy composition for making blister-free aluminum forgings and parts made therefrom |
| CN109825747A (en) * | 2019-01-21 | 2019-05-31 | 广东精美特种型材有限公司 | A kind of high Squeezing ground Cutting free bismuth-containing aluminium alloy of low cost and preparation method thereof |
-
2019
- 2019-06-24 CN CN201910550945.3A patent/CN110157965B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63140060A (en) * | 1986-12-02 | 1988-06-11 | Furukawa Alum Co Ltd | Free-cutting aluminum-alloy casting and its production |
| US5863359A (en) * | 1995-06-09 | 1999-01-26 | Aluminum Company Of America | Aluminum alloy products suited for commercial jet aircraft wing members |
| EP1281781A1 (en) * | 2001-07-30 | 2003-02-05 | Alcoa Inc. | Alloy composition for making blister-free aluminum forgings and parts made therefrom |
| CN109825747A (en) * | 2019-01-21 | 2019-05-31 | 广东精美特种型材有限公司 | A kind of high Squeezing ground Cutting free bismuth-containing aluminium alloy of low cost and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394601A (en) * | 2020-03-25 | 2020-07-10 | 广东领胜新材料科技有限公司 | Casting method of large-size lead-free-cutting aluminum alloy cast rod |
| CN111394601B (en) * | 2020-03-25 | 2021-05-25 | 广东领胜新材料科技有限公司 | Casting method of large-size lead-free-cutting aluminum alloy cast rod |
| CN112195380A (en) * | 2020-10-14 | 2021-01-08 | 佛山市深达美特种铝合金有限公司 | Extruded aluminum alloy for oilless bearing and preparation method thereof |
| CN112553549A (en) * | 2020-12-03 | 2021-03-26 | 广东领胜新材料科技有限公司 | Homogenization treatment method for large-diameter free-cutting aluminum alloy cast rod |
| CN112553549B (en) * | 2020-12-03 | 2021-09-24 | 广东领胜新材料科技有限公司 | Homogenization treatment method for large-diameter free-cutting aluminum alloy cast rod |
| CN112813365A (en) * | 2020-12-29 | 2021-05-18 | 淮安和通汽车零部件有限公司 | Method for processing aluminum alloy section for automobile exterior trim |
| CN113578997A (en) * | 2021-08-03 | 2021-11-02 | 南京超明精密合金材料有限公司 | Processing technology of super free-cutting precision alloy rod and wire |
| CN113578997B (en) * | 2021-08-03 | 2024-02-02 | 南京超明精密合金材料有限公司 | Processing technology of super-easy-cutting precision alloy rod wire |
| CN114293077A (en) * | 2021-12-29 | 2022-04-08 | 北京理工大学 | High-strength aluminum-copper alloy for aerospace structural member and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110157965B (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110157965A (en) | A kind of free machining aluminium copper extruded bars and preparation method thereof | |
| CN110358954A (en) | A kind of environmentally protective Cutting free aluminium copper and preparation method thereof | |
| CN109295360A (en) | A kind of easy-cutting aluminum alloy and preparation method thereof of embrittlement resistant to high temperatures | |
| CN101205577B (en) | Manufacturing technology of leadless easy-cutting aluminium alloy | |
| JP5069111B2 (en) | Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings | |
| CN100558922C (en) | A kind of leadless easy-cut aluminum alloy material and manufacturing process thereof | |
| CN105714148B (en) | A kind of high-strength adonic of spinodal decomposition type | |
| CN107447141B (en) | A kind of electronic product casing high-strength aluminum alloy and preparation method thereof | |
| CN108251710B (en) | High-strength and high-toughness high-silicon aluminum alloy suitable for extrusion casting and preparation process thereof | |
| WO2006014948A2 (en) | An al-si-mg-zn-cu alloy for aerospace and automotive castings | |
| CN111394601A (en) | Casting method of large-size lead-free-cutting aluminum alloy cast rod | |
| CN109722579A (en) | A kind of high strength alumin ium alloy bar and preparation method thereof | |
| CN108300884B (en) | A kind of hypoeutectic Al-Mg2The rotten and thinning method of Si alloy | |
| CN110747369A (en) | Lead-free-cutting silicon-magnesium-calcium brass alloy and preparation method thereof | |
| CN101294249A (en) | Leadless easy-cut aluminum alloy material and manufacturing technique thereof | |
| CN109465563A (en) | A kind of Al-Cu-Si-Ni-Mg-Ti-Bi acieral state solder and preparation method thereof | |
| CN109825747A (en) | A kind of high Squeezing ground Cutting free bismuth-containing aluminium alloy of low cost and preparation method thereof | |
| CN109439977A (en) | A kind of high tough erosion-resisting aluminium alloy and its preparation and pressing method | |
| CN113444911A (en) | High-strength high-toughness Al-Mg- (Al-Ti-Nb-B) alloy and preparation method thereof | |
| CN111647782A (en) | Regenerated aluminum alloy and preparation method thereof | |
| CN115652156B (en) | Mg-Gd-Li-Y-Al alloy and preparation method thereof | |
| CN114231793B (en) | Gravity casting zinc alloy | |
| EP4269641A1 (en) | Powdered material with high heat conductivity | |
| CN112575215B (en) | High-toughness aluminum alloy material for new energy automobile and method | |
| CN111363957A (en) | Lead-free environment-friendly free-cutting aluminum alloy and preparation method and application 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 | ||
| CP02 | Change in the address of a patent holder |
Address after: 528137 F22, first floor, building 23, No. 23, qiangye Avenue, Leping Town, Sanshui District, Foshan City, Guangdong Province (residence declaration) Patentee after: GUANGDONG XINGFA ALUMINIUM Co.,Ltd. Patentee after: GUANGDONG XINGFA ALUMINIUM (JIANGXI) Co.,Ltd. Address before: No.23 Renhe Road, Nanzhuang Town, Chancheng District, Foshan City, Guangdong Province 528100 Patentee before: GUANGDONG XINGFA ALUMINIUM Co.,Ltd. Patentee before: GUANGDONG XINGFA ALUMINIUM (JIANGXI) Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |