CN107034394B - A kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances - Google Patents

A kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances Download PDF

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CN107034394B
CN107034394B CN201510407116.1A CN201510407116A CN107034394B CN 107034394 B CN107034394 B CN 107034394B CN 201510407116 A CN201510407116 A CN 201510407116A CN 107034394 B CN107034394 B CN 107034394B
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refining
minutes
degasification
aluminium
aluminum
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CN107034394A (en
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程帅
陆时忠
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Shuai wing Chi New Material Group Co., Ltd.
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SHANGHAI SHUAIYICHI ALUMINUM ALLOY NEW MATERIAL Co Ltd
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Abstract

The present invention relates to technical field of aluminum alloy technology, more particularly to a kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances.Steps are as follows:Melting;It skims;Molten silicon;Check fractograph;Cooling;Slagging-off;Refining;Alterant is added;Degasification;It stands;Ingot casting.For the AlSi12Cu aluminium alloy ingots comprehensive performance of the method for the present invention production through test of many times, testing result is superior to existing production method.

Description

A kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances
Technical field
The present invention relates to technical field of aluminum alloy technology, more particularly to a kind of life promoting AlSi12Cu aluminium alloy ingots comprehensive performances Production method.
Background technology
AlSi12Cu is aluminium-Si system alloy in cast aluminium alloy gold, which has excellent casting character, and purposes is very Extensively, for example, vehicle wiper connector etc..It is too simple to the production technology of AlSi12Cu aluminium ingots in currently available technology, it is raw Production process becomes a mere formality, so product quality situation is accidentally ideal.
In the prior art when the trade mark Product Process, the characteristics of could not fully considering consumer products so that later stage die casting There is the defective products that many intensity do not reach requirement in part, and the product qualified rate promotion of user is restricted, such aluminium ingot manufacturer Application extension it is also restrained.
Carry out the operation of production AlSi12Cu aluminium alloy ingots according to existing production method, product not easy mold release, coarse grains, Die casting product comprehensive performance is unable to reach and meets the further quality requirement of die casting user.
Invention content
It is in the prior art above-mentioned scarce to solve the purpose of the present invention is promoting the comprehensive performance of AlSi12Cu aluminium alloy ingots It falls into.
In order to achieve the above object, the present invention provides a kind of producers promoting AlSi12Cu aluminium alloy ingots comprehensive performances Method, the production method include throwing the whole process that stove is melted to casting ingot from aluminium material.
The specific technical solution of the present invention is:
A kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances, steps are as follows:
(1)Will be in the wrought aluminium of mass percent 80% and ladle refining smelting furnace, progress is fluxing, and always a length of 5-7 is small when fusing When, melting temperature control is 630-740 DEG C;
(2)It skims:15-20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, liquid level 5-10 is gently beaten with trivet It skims after minute, and aluminium slag is cleared out into fire door, molten aluminum cannot be stirred with trivet;
(3)Molten silicon:Metallic silicon is added when molten aluminum surface is without dross, is sufficiently stirred molten aluminum 3-5 minutes with trivet after addition, so After heating of opening fire be stirred for 3-5 minutes within 10-15 minute, repeatedly 4-6 times;
(4)Molten silicon terminates, and after final temperature reaches 760-780 DEG C of one cooling of aluminium ingot of casting manually, saws a small notch, Inspection fractograph is interrupted, when fracture is fine and close, nothing is siliceous apparent, otherwise should continue stirring, casting aluminium ingot, check, Until reaching requirement.
(5)Cooling:Add the adjustment material that quality control is issued that the temperature of molten silicon is dropped to 710-730 DEG C of the temperature that refining requires, such as The low heating that should open fire of fruit temperature;It can also be once multiple to add cooling material that can be, to be determined according to molten aluminum ingredient in stove, but Ensure that aluminium material is clean, definite ingredients;Later stage should be added if you need to add silicon, manganese on a small quantity in the form of intermediate alloy;
(6)Slagging-off:Be added after adjustment material according to molten aluminum surface scum number determine that the input amount of slag-cleaning agent, range exist 10-15㎏;It skims after beaing liquid level 5-10 minutes with trivet, and aluminium slag is cleared out into fire door, molten aluminum cannot be stirred with trivet;
(7)Refining:It is divided into twice, refines for the first time:Temperature of aluminum liquid control is 720 ± 10 DEG C;Refining time is controlled 20 Minute;It skims Jian≤15 minute Shi;The control of refining agent quantity is 1.4-1.7KG/ tons.Second of refining:Temperature of aluminum liquid controls 720±10℃;Refining time was controlled at 20 minutes;It skims Jian≤15 minute Shi;The control of refining agent quantity is 1.1-1.3KG/ tons;
(8)Alterant is added:After refining, alterant is added and goes bad, so that silicon is mutually refined, alterant scope control It is 1-1.5KG/ tons.
(9)Degasification:Degasification time control is 20-30 minutes, and temperature control is 700-710 DEG C, and degasification terminates aluminium ingot of casting It is detected grain size, aluminium ingot fracture grain size is better than entering next process after being equal to 2 grades;Degassing procedure should be when having a dross Dross is focused on fire door by degasification before terminating and is taken off totally with trivet by degasification;
(10)The refining of melting workshop section, degasification method:Refining pipe bend is extended downwardly into aluminum water, nitrogen valve is opened simultaneously Nitrogen output pressure, is adjusted to 0.2Mpa by door, first by it is left-to-right or by the right side to it is left it is longitudinal refine, degasification, next is from the inside to the outside Or by outside to inside laterally refining, degasification, " well " font is formed to reach to stir in furnace inner space, do not allow to continue at some position It stops;
(11)It stands:Time of repose 15-20 minutes, 700-720 DEG C of dwell temperature;Molten aluminum can not be stirred during standing to protect Protect the oxidation film that molten aluminum surface is formed;
(12)Ingot casting.
Further, above-mentioned steps(3)Molten silicon step, is that metallic silicon is added in no dross;Wen Du≤720 when addition ℃;Molten aluminum was stirred at interval of 10-15 minutes 3-5 minutes;Cease fire when stirring;It is heated up to stop heating at 760-780 DEG C;It is usually whole A molten silicon time control is 60-90 minutes, it may be necessary to be increased to 120 minutes;Silicon, manganese addition want abundance to prevent the later stage It adds on a small quantity.
Further, above-mentioned steps(10)Refining pipe bent-up end mouth and furnace bottom will be kept certain by refining, degassing procedure always Distance, generally remain in apart from the height of furnace bottom 1/4;Movement speed will be at the uniform velocity when each refining, degasification in length and breadth;It to be controlled when degasification Gao Du≤15CM that molten aluminum processed is splash.
The beneficial effects of the invention are as follows:
1, through test of many times, testing result is superior to existing the AlSi12Cu aluminium alloy ingots comprehensive performance of the method for the present invention production There is production method.
2, so that the AlSi12Cu aluminium alloy ingots produced using the method for the present invention, after carrying out die casting, product is not easy to take off Mould phenomenon is reduced, and the product recrystallized structure phenomenon that becomes larger well is improved.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate this hair It is bright, rather than limit protection scope of the present invention.Technical staff is according to the improvement of the invention made and tune in practical applications It is whole, still fall within protection scope of the present invention.
It is listed below embodiment, to illustrate the present invention.
A kind of AlSi12Cu aluminium alloy ingots, composition are expressed as with mass fraction:
Si:12.49%、Fe:0.62%、Cu:0.03%、Mn:0.21%、Mg:0.18%、Cr:0.04%、Ni:0.02%、Zn: 0.32%、Ti:0.03%、Pb:0.01%、Sn:0.0006%。
4, the manufacturing process for promoting AlSi12Cu aluminium alloy ingots comprehensive performances is as follows:
The alloying component in addition to aluminum, mainly contains the ingredient of following weight percent:
(1)Will be in the wrought aluminium of mass percent 80% and ladle refining smelting furnace, progress is fluxing, always 7 hours a length of when fusing, Melting temperature control is 725 DEG C;
(2)It skims:20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, liquid level is gently beaten after ten minutes with trivet It skims, and aluminium slag is cleared out into fire door;
(3)Molten silicon:Metallic silicon is added when molten aluminum surface is without dross, is sufficiently stirred molten aluminum 5 minutes with trivet after addition, then Heating of opening fire is stirred for 5 minutes for 15 minutes, is repeated 6 times;
(4)Molten silicon terminates, and after final temperature reaches 773 DEG C of one coolings of aluminium ingot of casting manually, saws a small notch, interrupts Check fractograph, fracture is fine and close, meets the requirements without apparent siliceous point.
(5)Cooling:Add the adjustment material that quality control is issued that the temperature of molten silicon is dropped to 721 DEG C of the temperature that refining requires;
(6)Slagging-off:It is added after adjustment material and 15 ㎏ of slag-cleaning agent is put into according to molten aluminum surface scum(Slag-cleaning agent is by upper marine rainbow light gold Belong to the production of solvent factory, model HGJ-3);Liquid level is beaten with trivet to skim after ten minutes, and aluminium slag is cleared out into fire door;
(7)Refining:It is divided into twice, refines for the first time:Temperature of aluminum liquid is 721 DEG C;Refining time is 20 minutes;Slag-removing time It is 15 minutes;Refining agent quantity is 30KG.Second of refining:Temperature of aluminum liquid is 718 DEG C;Refining time is 20 minutes;When skimming Between be 15 minutes;Refining agent quantity is 24KG;(Refining agent is produced by upper marine rainbow light metal solvent factory, model HGK5-1A)
(8)Alterant is added:After refining, alterant is added and goes bad, alterant quantity is 17KG.(Alterant It is produced by Jie Ya metallurgical applications Technology Co., Ltd. of Zhangjagang City, entitled al-sr alloy)
(9)Degasification:The degasification time is 30 minutes, and temperature control is 715 DEG C, and degasification terminates casting aluminium ingot and is detected crystal grain Degree, aluminium ingot fracture grain size are 2 grades;
(10)It stands:Time of repose 20 minutes, 710 DEG C of dwell temperature;
(11)Ingot casting.
1, chute, mold are cleared up:1. being cleaned out first with the aluminium material on hook holder chute;Secondly with hairbrush loosening Heat-resisting material and other sundries clean up.It is gently purged totally with tracheae after cleaning, is touched with hand, confirm free from dust on hand; 2. mold cleaning:The aluminium material of adherency is cleaned up with small crooked chisel, then purges mold with tracheae, brush mould wash fills before casting Divide baking dies.2, mountain flour is swiped:Talcum powder presses 1 with pure water:After 4 ratio reconciles uniformly, chute is evenly coated in hairbrush On, it waits for 18 minutes, silicic acid paper cap above chute, the sectional baking of lower section small fire, until each section of moisture content is dried. 3, it polishes, clear up(For chute):After drying, chute injustice, protrusion or the place of loosening are gently ground off with sand paper, are allowed to flat It is whole;After the completion of polishing everywhere, then with hairbrush gently the talcum powder polished off is cleaned out, finally gently purge and done with tracheae Only.4, distribution drum cleared up, purged;5, ingot mould cleared up, purged, swabbing, baking;6, to ingot casting line and folded ingot The rolling inspection of machine(Drum containing distribution, mold, operation are primary);7, cooling water is checked;8, mine lamp, plug are checked before casting The preparation of the operation instruments such as head, plug sleeve, silicic acid paper, spades.9, casting process:Cast temperature is 704 DEG C in stove, distributes drum 681 DEG C, place filter screen, ingot casting speed 12m/min.10, before 1. casting workshop section personnel start ingot casting when refining for second Preparation;2. making grain size detection before, during and after ingot casting respectively, grain size testing result is respectively two level, level-one, level-one.
Shown in following table:
By controlling the content of ferro element, product is made to be easier to demould in die casting;By being used to eutectic Si system alloy Strontium is rotten, so that silicon is mutually refined, improves the mechanical property of product.

Claims (4)

1. a kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances, steps are as follows:(1)By mass percent 80% Wrought aluminium and ladle refining smelting furnace in, carry out fluxing, when total fusing is 5-7 hour a length of, and melting temperature control is 630-740 °C; (2)It skims:15-20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, are skimmed after beaing liquid level 5-10 minutes with trivet, and Aluminium slag is cleared out into fire door, molten aluminum cannot be stirred with trivet;(3)Molten silicon:Metallic silicon is added when molten aluminum surface is without dross, after addition It is sufficiently stirred molten aluminum 3-5 minutes with trivet, heating of then opening fire is stirred for 3-5 minutes for 10-15 minutes, is repeated 4-6 times;(4) Molten silicon terminates, and after final temperature reaches 760-780 °C of one cooling of aluminium ingot of casting manually, saws a small notch, it is disconnected to interrupt inspection Otherwise mouth tissue should continue to stir, casting aluminium ingot, check, be wanted up to reaching when fracture is fine and close, nothing is siliceous apparent It asks;(5)Cooling:The temperature of molten silicon is dropped into 710-730 °C of the temperature that refining requires by adjustment material;(6)Slagging-off:Adjustment is added The input amount of slag-cleaning agent is determined according to the number of molten aluminum surface scum after material, range is in 10-15 ㎏;Liquid level 5- is beaten with trivet It skims after ten minutes, and aluminium slag is cleared out into fire door, molten aluminum cannot be stirred with trivet;(7)Refining:It is divided into twice, for the first time essence Refining:Temperature of aluminum liquid control is 720 ± 10 °C;Refining time was controlled at 20 minutes;It skims Jian≤15 minute Shi;Refining agent quantity control It is made as 1.4-1.7Kg/ tons;Second of refining:Temperature of aluminum liquid control is 720 ± 10 °C;Refining time was controlled at 20 minutes;It takes off Jian≤15 minute slag Shi;The control of refining agent quantity is 1.1-1.3Kg/ tons;(8)Alterant is added:After refining, it is added and becomes Matter agent is gone bad, and silicon is made mutually to refine, and alterant scope control is 1-1.5KG/ tons;(9)Degasification:Degasification time control is 20- 30 minutes, temperature control was 700-710 °C, and degasification terminates casting aluminium ingot and is detected grain size, and aluminium ingot fracture grain size is better than Enter next process after equal to 2 grades;Degassing procedure has and dross should be focused on stove by degasification before degasification terminates when dross Mouth is taken off totally with trivet;(10)The refining of melting workshop section, degasification method:Refining pipe bend is extended downwardly into aluminum water, is opened simultaneously Nitrogen output pressure is adjusted to 0.2MPa by nitrogen valve, first by it is left-to-right or by the right side to it is left it is longitudinal refine, degasification, next by It is interior to outer or by outside to inside laterally refining, degasification, to form " well " font to reach to stir in furnace inner space, not allow in some portion Position is lasting to be stopped;(11)It stands:Time of repose 15-20 minutes, 700-720 °C of dwell temperature;Molten aluminum can not be stirred during standing With the oxidation film for protecting molten aluminum surface to be formed;(12)Ingot casting.
2. a kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances according to claim 1, which is characterized in that institute State step(3)Molten silicon step, is that metallic silicon is added in no dross;Wen Du≤720 °C when addition;It was stirred at interval of 10-15 minutes Mix molten aluminum 3-5 minutes;Cease fire when stirring;It is heated up to stop heating at 760-780 °C;Entirely molten silicon time control is 60-120 points Clock;Silicon, manganese addition want abundance to prevent the later stage from adding on a small quantity.
3. a kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances according to claim 2, which is characterized in that institute It is 60-90 minutes to state entirely molten silicon time control.
4. a kind of production method promoting AlSi12Cu aluminium alloy ingots comprehensive performances according to claim 1, which is characterized in that institute State step(10)Refining, degassing procedure will always maintain a certain distance refining pipe bent-up end mouth and furnace bottom, be maintained at apart from stove 1/4 height of bottom;Movement speed will be at the uniform velocity when each refining, degasification in length and breadth;Gao Du≤15cm that molten aluminum is splash is controlled when degasification.
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CN107937767B (en) * 2017-12-28 2019-07-26 苏州仓松金属制品有限公司 A kind of novel high-performance aluminum alloy materials and preparation method thereof
CN108342622A (en) * 2018-03-07 2018-07-31 瞿凌飞 A kind of preparation method of the compound Al-Si-Cu alloy of rare earth coating
CN108277371A (en) * 2018-03-07 2018-07-13 戴爱娟 A kind of preparation method for the Al-Si-Cu alloy material having coating
CN109097611A (en) * 2018-08-24 2018-12-28 海门市沪海有色铸造有限公司 A kind of aluminum melting process

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