CN100424216C - Solution treatment method for Mg-Al series cast magnesium alloy heat treatment reinforcement - Google Patents
Solution treatment method for Mg-Al series cast magnesium alloy heat treatment reinforcement Download PDFInfo
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- CN100424216C CN100424216C CNB2006100951977A CN200610095197A CN100424216C CN 100424216 C CN100424216 C CN 100424216C CN B2006100951977 A CNB2006100951977 A CN B2006100951977A CN 200610095197 A CN200610095197 A CN 200610095197A CN 100424216 C CN100424216 C CN 100424216C
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Abstract
The invention relates to a solution treatment method for enhancing Mg-Al series casting magnesium alloy thermal treatment. It includes the following steps: after smelting the Mg-Al series casting magnesium alloy and heating to 700-720 degree centigrade, removing dross and casting, after the temperature decreasing below alloy solidus temperature, keeping thermal for 12-17 hours under the protecting atmosphere and rapidly tempering into water. The invention could gain large supersaturation solid solubility in a short time and it also brings great energy benefits.
Description
Technical field:
What the present invention relates to is a kind of magnesium alloy heat treatment reinforcement method, belongs to class of metal materials and field of metallurgy.
Background technology:
Modern society, the energy and environmental problem become the focus that people pay close attention to day by day.In order to cut down the consumption of energy, reduce the environmental pollution that vehicle exhaust causes, the lightweight of automobile becomes one of target that each big automobile vendor of the world does one's utmost to pursue.And magnesium alloy is as light-weight structural timber, because of its have light specific gravity, specific tenacity specific rigidity height, damping vibration attenuation fall dry ability strong, can electromagnetic radiation shielding and be easy to advantage such as recycling, make it be particularly suitable for the application in the vehicles such as automobile, motorcycle and fields such as computer, communication, instrument and military affairs, be described as 21 century " green structured material ".Since the nineties in 20th century, the application of magnesium alloy in world's automotive industry be just with the speed increment in every year about 20%, and this is being most widely used with AZ and two Mg-Al series cast magnesium alloys of AM again wherein.But the mechanical property of existing Mg-Al series cast magnesium alloy also is difficult to satisfy current and conveying mechanical parts such as automobile, aircraft industrial expansion requirement from now on both at home and abroad at present.Therefore, people just study the Mg-Al series cast magnesium alloy from aspects such as alloying constituent optimization, the rotten processing of refinement and thermal treatments, in the hope of improving its comprehensive mechanical property.And in the various technological measures that improve Mg-Al series cast magnesium 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 Mg-Al series cast magnesium alloy always.
As everyone knows, the thermal treatment of Mg-Al series cast magnesium 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 alloy and crucial, obtains satisfied solution treatment effect by technology controlling and process and just seems particularly crucial for the heat treatment reinforcement of Mg-Al series cast magnesium alloy.At present, carried out certain research for the solution treatment of Mg-Al series cast magnesium alloy both at home and abroad, and set up some relevant theory and engineering application technology standards, but these solid solution treatment processes that have been applied all reheat under the solid solution temperature condition behind Mg-Al series cast magnesium alloy cool to room temperature and to carry out.Owing to need reheat, clearly, these solid solution treatment processes that developed existence heating and soaking time are long, problems such as energy consumption is big, in addition, technological factors such as the type of heating of also necessary strict control Mg-Al series cast magnesium 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 Mg-Al series cast magnesium 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 Mg-Al series cast magnesium 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 the Mg-Al series cast magnesium alloy.
Summary of the invention:
The objective of the invention is to overcome the deficiency of existing Mg-Al series cast magnesium alloy solid solution treatment method, a kind of solid solution treatment method that is used for the Mg-Al series cast magnesium 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 the Mg-Al series cast magnesium 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 Mg-Al series cast magnesium alloy are organically combined.It is after under flux or the gas shield Mg-Al series cast magnesium alloy of certain ingredients being warmed up to 700～720 ℃ after by the composition proportion fusing; drag for alloy liquid surface scum; cast then; in castingprocesses after the temperature of alloy drops to solid solution temperature below the alloy solidus temperature; alloy is incubated 12～17 hours under protective atmosphere, takes out in the entry of quenching fast then.
As seen from Figure 1, Mg-Al series cast magnesium 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 solution treatment 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 is owing to organically combine castingprocesses and heat treatment process, 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 the Mg-Al series cast magnesium alloy solidifies cooling and solution treatment is among the successive processes, make 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 in the short period of time bigger super saturated solid solution degree, 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:
Under flux or the gas shield Mg-6Al-Zn-0.7Si-0.25Mn alloy is being warmed up to 720 ℃ after by the fusing of corresponding composition proportion; drag for alloy liquid surface scum; carry out metal mold gravity casting then; in castingprocesses after the temperature of alloy drops to 415 ℃ of solid solution temperatures below the alloy solidus temperature; alloy is incubated 15 hours under protective atmosphere, takes out in the entry of quenching fast then.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 also is improved to some extent.
Embodiment 2:
Under flux or the gas shield Mg-9Al-1Zn-0.25Mn alloy is being warmed up to 720 ℃ after by the fusing of corresponding composition proportion; drag for alloy liquid surface scum; carry out metal mold gravity casting then; in castingprocesses after the temperature of alloy drops to 420 ℃ of solid solution temperatures below the alloy solidus temperature; alloy is incubated 17 hours under protective atmosphere, takes out in the entry of quenching fast then.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 15% solution treatment cost, and the alloy at room temperature tensile property also is improved to some extent.
Embodiment 3:
Under flux or the gas shield Mg-4Al-8Zn-0.25Mn alloy is being warmed up to 720 ℃ after by the fusing of corresponding composition proportion; drag for alloy liquid surface scum; carry out metal mold gravity casting then; in castingprocesses after the temperature of alloy drops to 340 ℃ of solid solution temperatures below the alloy solidus temperature; alloy is incubated 12 hours under protective atmosphere, takes out in the entry of quenching fast then.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 40% solution treatment cost, and the alloy at room temperature tensile property also is improved to some extent.
Claims (2)
1. solid solution treatment method that is used for the Mg-Al series cast magnesium alloy heat treatment reinforcement; under flux or the gas shield with the Mg-A1 series cast magnesium alloy by after being warmed up to 700～720 ℃ after the composition proportion fusing; drag for alloy liquid surface scum; cast then; in castingprocesses after the temperature of alloy drops to solid solution temperature below the alloy solidus temperature; alloy is incubated 12～17 hours under protective atmosphere, takes out in the entry of quenching fast then.
2. solid solution treatment method according to claim 1 is characterized in that: the described metal mold gravity casting that is cast into.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100951977A CN100424216C (en) | 2006-10-14 | 2006-10-14 | Solution treatment method for Mg-Al series cast magnesium alloy heat treatment reinforcement |
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| CNB2006100951977A CN100424216C (en) | 2006-10-14 | 2006-10-14 | Solution treatment method for Mg-Al series cast magnesium alloy heat treatment reinforcement |
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| CN1936061A CN1936061A (en) | 2007-03-28 |
| CN100424216C true CN100424216C (en) | 2008-10-08 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424218C (en) * | 2007-07-11 | 2008-10-08 | 华中科技大学 | Magnesium alloy casting semi solid-state heat treatment method |
| CN103320730B (en) * | 2013-06-08 | 2015-06-10 | 江苏大学 | Magnesium alloy heat treatment method combined with high-energy ultrasonic processing |
| CN114182185A (en) * | 2021-12-03 | 2022-03-15 | 上海航天精密机械研究所 | Microwave-assisted solution treatment method for magnesium alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5409555A (en) * | 1992-09-30 | 1995-04-25 | Mazda Motor Corporation | Method of manufacturing a forged magnesium alloy |
| CN1360078A (en) * | 2001-12-04 | 2002-07-24 | 上海交通大学 | Solid solution reinforced cast Mg alloy with high strength and low thermocracking tendency |
| JP2002317236A (en) * | 2001-04-17 | 2002-10-31 | Colcoat Kk | Magnesium alloy molding material, production method therefor and production method for molding |
| US20030173005A1 (en) * | 2002-03-12 | 2003-09-18 | Takata Corporation | Method of manufacturing magnesium alloy products |
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2006
- 2006-10-14 CN CNB2006100951977A patent/CN100424216C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5409555A (en) * | 1992-09-30 | 1995-04-25 | Mazda Motor Corporation | Method of manufacturing a forged magnesium alloy |
| JP2002317236A (en) * | 2001-04-17 | 2002-10-31 | Colcoat Kk | Magnesium alloy molding material, production method therefor and production method for molding |
| CN1360078A (en) * | 2001-12-04 | 2002-07-24 | 上海交通大学 | Solid solution reinforced cast Mg alloy with high strength and low thermocracking tendency |
| US20030173005A1 (en) * | 2002-03-12 | 2003-09-18 | Takata Corporation | Method of manufacturing magnesium alloy products |
| CN1443862A (en) * | 2002-03-12 | 2003-09-24 | 高田株式会社 | Method for making magnesium alloy product |
Non-Patent Citations (2)
| Title |
|---|
| 固溶和时效对压铸AZ91HP合金力学性能的影响. 刘正，刘重阳，王中光.金属学报，第35卷第8期. 1999 |
| 固溶和时效对压铸AZ91HP合金力学性能的影响. 刘正，刘重阳，王中光.金属学报，第35卷第8期. 1999 * |
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