CN100415908C - Solution treatment method for hypoeutectic cast aliuminium-silicon alloy heat treatment reinforcement - Google Patents
Solution treatment method for hypoeutectic cast aliuminium-silicon alloy heat treatment reinforcement Download PDFInfo
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- CN100415908C CN100415908C CNB2006100951996A CN200610095199A CN100415908C CN 100415908 C CN100415908 C CN 100415908C CN B2006100951996 A CNB2006100951996 A CN B2006100951996A CN 200610095199 A CN200610095199 A CN 200610095199A CN 100415908 C CN100415908 C CN 100415908C
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Abstract
The invention relates to a solution treatment method to intensify hypoeutectic casting aluminum-silicon alloy thermal treatment. It includes the following steps: after melting hypoeutectic casting aluminum-silicon alloy, heating to 720-740 degree centigrade, removing dross, taking metamorphism treatment to ternary alterative that is 3wt% of the total charge weight for 15-20 minutes, after that taking refining treatment by hexachloroethane and removing slag, standing for 5-10 minutes at 730-740 minutes, taking metal type gravity casting, after the temperature decreasing under solution treatment process temperature, keeping for 3-8 hours, and tempering into water. The invention effectively ensures vast supersaturation solid solubility in a short time and would bring great energy benefits.
Description
Technical field:
What the present invention relates to is a kind of cast Al-Si alloy heat treatment reinforcement method, belongs to class of metal materials and field of metallurgy.
Background technology:
Cast Al-Si alloy is as the important component part of aluminum alloy materials, because of it has that unit weight is little, intensity is high, cast form is good and series of advantages such as machining property is good, therefore be widely applied at present on Aeronautics and Astronautics, automobile and other conveying mechanicals, used this material can alleviate equipment self-weight, save energy greatly, reduce cost, raise the efficiency.But at present both at home and abroad the mechanical property of the cast Al-Si alloy of the existing trade mark still can not be equal to high-strength cast steel mutually at aspects such as specific tenacity and unit elongation, is difficult to satisfy current and conveying mechanical parts such as automobile, aircraft industrial expansion requirement from now on.Therefore, people just study cast Al-Si alloy from aspects such as alloying constituent optimization, purifying treatment, the rotten processing of refinement and thermal treatments, in the hope of improving its comprehensive mechanical property.And in improving the various technological measures of cast Al-Si alloy mechanical property, because thermal treatment can be brought into play the performance potential of alloy to greatest extent, therefore given both at home and abroad to pay close attention to widely and attention highly for the heat treatment reinforcement of cast Al-Si alloy always.
As everyone knows, the thermal treatment of cast Al-Si alloy generally comprises solution treatment and two operations of ageing treatment, therefore how wherein solution treatment is the basis of the follow-up ageing treatment of cast Al-Si alloy and crucial, obtains satisfied solution treatment effect by technology controlling and process and just seems particularly crucial for the heat treatment reinforcement of cast Al-Si alloy.At present, a large amount of research of having carried out for the solution treatment of cast Al-Si alloy both at home and abroad, and single-stage, twin-stage and different solid solution treatment process such as multistage have successively been developed, and set up relevant theory and engineering application technology standard, but these solid solution treatment processes of having developed all carry out reheating under the solid solution temperature condition behind the cast Al-Si alloy cool to room temperature.Owing to need reheat, clearly, problems such as these solid solution treatment processes that developed existence are heated and soaking time is long, energy consumption is big, in addition, technological factors such as the type of heating of also necessary strict control cast Al-Si alloy and rate of heating, it is improper because in case type of heating and rate of heating are selected, it is uneven to produce heating, be difficult to guarantee the homogeneity of alloy super saturated solid solution degree, cause the comprehensive mechanical property of alloy to be affected, thereby make the effect of solution treatment in the cast Al-Si alloy heat treatment reinforcement be difficult to perform to maximum limit.Therefore how to avoid the deficiency of the existing solid solution treatment process of cast Al-Si alloy, research and develop novel solid solution treatment method and just seem particularly important for bringing into play the strengthening effect of thermal treatment to greatest extent to cast Al-Si alloy.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing cast Al-Si alloy solid solution treatment method, a kind of solid solution treatment method that is used for the hypoeutectic cast aluminium-silicon alloy heat treatment reinforcement is proposed, adopt this method both can save energy, shorten the solid solution soaking time and do not influence the heat treatment reinforcement effect, thereby help further to enlarge the application of heat treatment reinforcement in cast Al-Si alloy.
To achieve these goals, the present invention proposes a kind of solid solution treatment method that the castingprocesses and the heat treatment process of hypoeutectic cast aluminium-silicon alloy are organically combined, it is to be warmed up to 720～740 ℃ after hypoeutectic cast aluminium-silicon alloy is melted by composition proportion, drag for alloy liquid surface scum, between 750～780 ℃ the 3% ternary alterant (62%NaCl+25%NaF+13%KCl) that accounts for the alloy charging weight after the preheating is carried out 15～20 minutes rotten processing then, back hexachloroethane (C disposes
2Cl
6) carry out refining treatment, to skim then, left standstill 5～10 minutes at 730～740 ℃ the back of skimming, carry out metal mold gravity casting then, in castingprocesses, after the temperature of alloy drops to solid solution temperature below the solidus temperature,, take out in the entry of quenching fast then alloy insulation 3～8 hours.
As seen from Figure 1, hypoeutectic cast aluminium-silicon alloy tradition solid solution treatment method is behind the alloy casting cool to room temperature, and then reheats the solid solution temperature insulation regular hour, carries out shrend then.The solid content processing method that the present invention proposes then is to carry out solution treatment in the alloy casting process of cooling, promptly is incubated the regular hour immediately during the solid solution temperature below alloy temperature drops to solidus temperature, carries out shrend then, sees shown in Figure 2.Obviously, the solid solution treatment method that the present invention proposes, because castingprocesses and heat treatment process are organically combined, avoided original solid solution treatment method after the alloy graining cooling, to reheat this technological process, efficiently solved type of heating and the improper problem of bringing of heating rate control because of reheating; And because hypoeutectic cast aluminium-silicon alloy solidifies cooling and solution treatment is among the successive processes, make hypoeutectic cast aluminium-silicon alloy be in the higher state of temperature always, the diffusibility of inner atom is strong, some low melting point alloys are not also separated out mutually fully in addition, therefore can guarantee to obtain bigger super saturated solid solution degree degree in the short period of time, for follow-up ageing treatment has been established the good tissue basis.Simultaneously, the source benefit that brings than short solid solution soaking time also is very significant.
Description of drawings
Fig. 1 is the temperature-timing relationship synoptic diagram of traditional solid solution treatment method.
Fig. 2 is the temperature-timing relationship synoptic diagram of the solid solution treatment method that proposes of the present invention.
Embodiment:
Below by three concrete embodiment technical scheme of the present invention and effect are further elaborated.
Embodiment 1:
The ZL101 aluminum silicon alloy is warmed up to 720 ℃ after by the fusing of corresponding composition proportion, drag for alloy liquid surface scum, between 760 ℃ the 3% ternary alterant (62%NaCl+25%NaF+13%KCl) that accounts for the alloy charging weight after the preheating is carried out 20 minutes rotten processing then, back hexachloroethane (C disposes
2Cl
6) carry out refining treatment, to skim then, left standstill 5 minutes at 730 ℃ the back of skimming, carry out metal mold gravity casting then, in castingprocesses, after the temperature of alloy drops to 535 ℃ of solid solution temperatures below the alloy solidus temperature,, take out in the entry of quenching fast then alloy insulation 3 hours.After solution treatment is finished routinely aging treatment method (table 1) alloy is carried out ageing treatment.The alloy that adopts proposition method of the present invention to obtain is done the room temperature tensile performance test, the result is as shown in table 1, as can be seen from Table 1, compares with traditional method, adopt the present invention to propose method and can save 50% solution treatment cost, and the alloy at room temperature tensile property is suitable with traditional method.
Embodiment 2:
The ZL105 aluminum silicon alloy is warmed up to 720 ℃ after by the fusing of corresponding composition proportion, drag for alloy liquid surface scum, between 760 ℃ the 3% ternary alterant (62%NaCl+25%NaF+13%KCl) that accounts for the alloy charging weight after the preheating is carried out 20 minutes rotten processing then, back hexachloroethane (C disposes
2Cl
6) carry out refining treatment, to skim then, left standstill 5 minutes at 730 ℃ the back of skimming, carry out metal mold gravity casting then, in castingprocesses, after the temperature of alloy drops to 525 ℃ of solid solution temperatures below the alloy solidus temperature,, take out in the entry of quenching fast then alloy insulation 8 hours.After solution treatment is finished routinely aging treatment method (table 1) alloy is carried out ageing treatment.The alloy that adopts proposition method of the present invention to obtain is done the room temperature tensile performance test, the result is as shown in table 1, as can be seen from Table 1, compares with traditional method, adopt the present invention to propose method and can save 33% solution treatment cost, and the alloy at room temperature tensile property is suitable with traditional method.
Embodiment 3:
The ZL107 aluminum silicon alloy is warmed up to 720 ℃ after by the fusing of corresponding composition proportion, drag for alloy liquid surface scum, between 760 ℃ the 3% ternary alterant (62%NaCl+25%NaF+13%KCl) that accounts for the alloy charging weight after the preheating is carried out 20 minutes rotten processing then, back hexachloroethane (C disposes
2Cl
6) carry out refining treatment, to skim then, left standstill 5 minutes at 730 ℃ the back of skimming, carry out metal mold gravity casting then, in castingprocesses, after the temperature of alloy drops to 515 ℃ of solid solution temperatures below the alloy solidus temperature,, take out in the entry of quenching fast then alloy insulation 6 hours.After solution treatment is finished routinely aging treatment method (table 1) alloy is carried out ageing treatment.The alloy that adopts proposition method of the present invention to obtain is done the room temperature tensile performance test, the result is as shown in table 1, as can be seen from Table 1, compares with traditional method, adopt the present invention to propose method and can save 25% solution treatment cost, and the alloy at room temperature tensile property is suitable with traditional method.
Claims (1)
1. solid solution treatment method that is used for the hypoeutectic cast aluminium-silicon alloy heat treatment reinforcement, hypoeutectic cast aluminium-silicon alloy is warmed up to 720～740 ℃ by after the composition proportion fusing, drag for alloy liquid surface scum, between 750～780 ℃ the 3% ternary alterant 62%NaCl+25%NaF+13%KCl that accounts for the alloy charging weight after the preheating is carried out 15～20 minutes rotten processing then, back hexachloroethane C disposes
2Cl
6Carry out refining treatment, skim then, left standstill 5～10 minutes at 730～740 ℃ after skimming, carry out metal mold gravity casting then, in castingprocesses after the temperature of alloy drops to solid solution temperature below the alloy solidus temperature, with alloy insulation 3～8 hours, take out in the entry of quenching fast then.
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| CNB2006100951996A CN100415908C (en) | 2006-10-14 | 2006-10-14 | Solution treatment method for hypoeutectic cast aliuminium-silicon alloy heat treatment reinforcement |
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| CNB2006100951996A CN100415908C (en) | 2006-10-14 | 2006-10-14 | Solution treatment method for hypoeutectic cast aliuminium-silicon alloy heat treatment reinforcement |
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| CN100415908C true CN100415908C (en) | 2008-09-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101629251B (en) * | 2008-07-16 | 2011-06-22 | 贵州红林机械有限公司 | Method for smelting high-silicon aluminum alloy |
| CN103060583A (en) * | 2012-12-14 | 2013-04-24 | 安徽润鑫泰达智能系统工程有限公司 | Method for refining hypo eutectic aluminum-silicon alloy structure |
| CN105728698A (en) * | 2016-03-30 | 2016-07-06 | 山东省科学院新材料研究所 | Method for refining solidification structure of aluminum silicon alloy |
Citations (5)
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|---|---|---|---|---|
| CN1125263A (en) * | 1995-06-26 | 1996-06-26 | 上海交通大学 | Method for forming nascent silicon phase in hypoeutectic aluminiumsilicon alloy |
| JP2002346729A (en) * | 2001-05-21 | 2002-12-04 | Hitachi Metals Ltd | HYPOEUTECTIC Al-Si ALLOY CASTING AND ITS PRODUCING METHOD |
| CN1405345A (en) * | 2002-11-07 | 2003-03-26 | 上海交通大学 | Method for treating refined grain of hypoeutectic aluminium-silicon alloy at melt temperature |
| US20040055724A1 (en) * | 2002-09-20 | 2004-03-25 | Spx Corporation | Semi-solid metal casting process and product |
| US20040216857A1 (en) * | 2003-05-01 | 2004-11-04 | Deepak Saha | Semi-solid metal casting process of hypoeutectic aluminum alloys |
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2006
- 2006-10-14 CN CNB2006100951996A patent/CN100415908C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125263A (en) * | 1995-06-26 | 1996-06-26 | 上海交通大学 | Method for forming nascent silicon phase in hypoeutectic aluminiumsilicon alloy |
| JP2002346729A (en) * | 2001-05-21 | 2002-12-04 | Hitachi Metals Ltd | HYPOEUTECTIC Al-Si ALLOY CASTING AND ITS PRODUCING METHOD |
| US20040055724A1 (en) * | 2002-09-20 | 2004-03-25 | Spx Corporation | Semi-solid metal casting process and product |
| CN1405345A (en) * | 2002-11-07 | 2003-03-26 | 上海交通大学 | Method for treating refined grain of hypoeutectic aluminium-silicon alloy at melt temperature |
| US20040216857A1 (en) * | 2003-05-01 | 2004-11-04 | Deepak Saha | Semi-solid metal casting process of hypoeutectic aluminum alloys |
Non-Patent Citations (2)
| Title |
|---|
| 压力铸造对亚共晶Al-11Si-1.8Cu合金的组织细化作用. 杨明波，潘复生，彭晓东等.重庆大学学报（自然科学版），第28卷第1期. 2005 |
| 压力铸造对亚共晶Al-11Si-1.8Cu合金的组织细化作用. 杨明波，潘复生，彭晓东等.重庆大学学报（自然科学版），第28卷第1期. 2005 * |
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