CN106011563A - Hypo eutectic aluminum-magnesium alloy reinforcing method through melt compounding treatment - Google Patents
Hypo eutectic aluminum-magnesium alloy reinforcing method through melt compounding treatment Download PDFInfo
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- CN106011563A CN106011563A CN201610339987.9A CN201610339987A CN106011563A CN 106011563 A CN106011563 A CN 106011563A CN 201610339987 A CN201610339987 A CN 201610339987A CN 106011563 A CN106011563 A CN 106011563A
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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- 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
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- 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
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- 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
Abstract
The invention relates to a method for improving aluminum-magnesium cast alloy performances. Applicable alloy materials are as follows (wt.%): 4-11 of Mg, Fe lower than 0.6, Cu lower than 0.8, Si lower than 1.0, and the balance of aluminum; and a deterioration and hot speed treatment compounded melt treatment process is adopted. A melt compounding treatment method comprises the following steps: firstly, 60-80% of the total mass of an aluminum-magnesium alloy is superheated to reach 830-990 DEG C for insulation by 10-20 min; the remained normal-temperature alloy is added in a high-temperature molten alloy; a cold charge is quickly stirred for melting; the alloy melt is quickly cooled under the effect of the cold charge; and after the temperature of the melt is quickly reduced to 740-780 DEG C, Mn being 0.1-1% of the total mass of the alloy is added for uniformly stirring, and is stood by 3-15 minutes to cast in a casting mold. The melt compounding treatment process can improve the mechanical performance of the aluminum-magnesium alloy. The method is lower in production cost and easy to operate, and is obvious in reinforcing effect of the aluminum-magnesium alloy compared with a common casting method.
Description
Technical field
The present invention relates to class of metal materials and field of metallurgy, be specifically related to a kind of hypoeutectic aluminium-magnesium alloy melt compounding method.
Background technology
Aluminum-magnesium series alloy density is little, excellent cutting performance, has good room-temperature mechanical property and corrosion stability, can resist the erosion of sea water class medium, be referred to as Alcoa.In recent years, the most constantly research and develop various novel aluminium-magnesium alloy, to meet the demand of different field.Along with the development of science and technology, people are constantly expanding for range of application and the demand of aluminium-magnesium alloy.But due to the restriction of the oxidizable character of magnesium metal, the smelting technology of such alloy is complicated, and casting character is compared poor with some other aluminium alloy, easily makes cast-internal form oxide inclusion and shrinkage cavity in fusion process.And ferrum element is easily dissolved in aluminum liquid, making the plasticity of foundry goods be deteriorated and wall thickness effects is relatively big, long-time use has nature to become fragile and produces the tendency of stress corrosion, therefore its application is restricted.
For general ZL301, ZL303, ZL305 aluminum-magnesium series alloy, under the conditions of common smelting and pouring, the alloy grain obtained is thick, skewness, if iron content is higher, there is needle-like or lamellar Al in tissue3Fe phase, isolates matrix, and in alloy, Fe phase concentration zones becomes the stress raiser of foundry goods, hence it is evident that drop low-alloyed mechanical property.And, thick nascent faller gill shape ferrum, at the early origin of process of setting, hinders the liquid metals flowing at Feeding channel, causes casting flaw, general casting method to be difficult to remove.So, if can be by improving melt smelting technology, refining alloy crystal grain, change ferrum existing forms the most in the base, remove its illeffects, it is possible to for improving the technological approaches that the performance of this alloy provides new.
Alloy melt is converted into solid-state by Liquid-solid Transition by liquid, and therefore, the Liquid Structure state before cast alloy materials does not solidifies has directly impact to forming core growth course and the final solidified structure performance of crystal grain.So, configuration state when can be solidified by melt smelting technology technical controlling alloy melt improves alloy structure, improves performance.In terms of melt heat treatment, there is scholar by hypereutectic aluminium-silicon alloys is carried out thermal rate treatment confirmation, processed by suitable high-temperature fusant Quench and can effectively refine the primary silicon in alusil alloy, and change primary silicon pattern；QiXiao Gang et al. have studied the melt heat treatment impact on Zn-Al system and ZAS35 alloy structure with performance, result shows, Zn-Al system alloy room temperature structure refinement, uniformly after melt heat treatment, zinc-rich β phase increases, dendrite in kirsite is passivated, and the mechanical property of alloy is also greatly improved.The significant change that its tissue and mechanical property there occurs, the thinning effect of Eutectic Silicon in Al-Si Cast Alloys highlights, and is more evenly distributed in the middle of matrix, and the tensile strength of alloy and percentage elongation have also been obtained and significantly promote；Japanese scholars Ohmi once carried out research with regard to Melt Overheating Treatment to the effect of refinement alusil alloy primary silicon, and result of study confirms can effectively refine primary silicon by suitable method；The scholar such as M.M.Haque finds, the alusil alloy processed by hyperthermia and superheating can make enhancing the most evenly be distributed in the middle of matrix, strengthen the mechanical property of alloy.In terms of rotten strengthening, propose at present alterant element have Si, Mg, Mn, Ti, Ni, Y, rare earth etc..Wang Changqin et al. is by studying rare-earth yttrium to A356 alloy microscopic structure and the impact of tensile property, it was recently reported that yttrium has good metamorphism to aluminium-silicon alloys；Robles Hern á ndez etc. have studied the metamorphism to A390 alloy of the Cu-8P intermediate alloy, and compares this alloy microstructure before and after phosphorus modification, electromagnetic agitation and melt vibration processing, and modification effect is obvious；He Shunrong etc. have studied the rotten impact on ZA40 alloy structure, mechanical property and anti-wear performance of mixed rare earth of lanthanum and cerium (RE), shows that adding appropriate mixing lanthanum cerium mischmetal with crystal grain thinning tissue, can play the effect of suppression Eutectic Silicon in Al-Si Cast Alloys growth.If melt smelting technology is combined with Metamorphism treatment there is a possibility that the performances such as the tissue of aluminium alloy is further improved, mechanics improve the most further.At present, the report of the compounding method using thermal rate treatment to combine aluminium-magnesium alloy system is had no with Metamorphism treatment..
Summary of the invention
In order to solve coarse grains in aluminium-magnesium alloy, the problem such as the mechanical properties decrease that the factor such as Needle like Iron Phase causes, the invention provides one improves alloy microstructure, improves the melt compounding method of mechanical property.Melt compounding method is that thermal rate treatment is combined mutually with manganese element Metamorphism treatment, melt thermal rate treatment refers to be cooled to suitable high-temperature fusant Quench the smelting technology of pouring temperature, this technique can improve as-cast structure and the structure of multiple alloy, puies forward heavy alloyed mechanical property.
The aluminium-magnesium alloy composition (wt.%) that the present invention is suitable for consists of: Mg 4 ~ 11, Fe content is less than 0.6, and Cu content is less than 0.8, and Si content is less than 1.0, and remaining is aluminum.Concrete technology rule of operation is as follows:
(1) it is superheated to 830 DEG C ~ 990 DEG C by the 60% ~ 80% of aluminium-magnesium alloy gross mass, is incubated 10 ~ 20min；
(2) the congruent alloy material that remains that will be preheated to 50 DEG C ~ 200 DEG C joins in the aluminium alloy of predetermined temperature, and melt quickly cools down under the effect of this cold burden, temperature prompt drop to 730 DEG C ~ 780 DEG C；
(3) addition accounts for the Mn of alloy gross mass 0.1 ~ 1.0, stirs, and refining treatment is skimmed after standing 3-15 minute, poured into mold and get final product.
In described aluminium-magnesium alloy melt compounding method, re-use after Mn with Al is made 8 wt.% ~ 15 wt.% aluminum-manganese intermediate alloy.
Described aluminium-magnesium alloy melt compounding method, it is characterized in that step (1) is first superheated to 830 DEG C ~ 990 DEG C by the 60% ~ 80% of aluminium-magnesium alloy gross mass, then 10 ~ 20min it is incubated, its concrete melt temperature makes the appropriate adjustments according to alloying component difference, general content of magnesium is high, and alloy solution temperature will reduce.
The present invention selects aluminium-magnesium alloy to be parent, have employed above melt compounding method.By choosing the technological parameters such as suitable melt overheat temperature, temperature retention time, Quench mode, utilize the compound action with Mn element, invented a kind of new composite treatment process method, improved the microstructure and mechanical property of aluminium-magnesium alloy.
The compounding flux using the present invention processes technique can make the Primary α-Al Phase in aluminium-magnesium alloy be reduced to 30 ~ 50 μm by 120 ~ 270 μm, and almag is by the graininess that massive transformation is several microns of 15 ~ 25 μm, and grain corner is substantially passivated, and is evenly distributed.Its tensile strength of foundry goods, yield strength, hardness and the percentage elongation that process all obtain bigger raising.
Claims (4)
1. an aluminium-magnesium alloy melt compounding method, is characterized in that comprising the following steps:
(1) first it is superheated to 830 DEG C ~ 990 DEG C by the 60% ~ 80% of aluminium-magnesium alloy gross mass, is incubated 10 ~ 20min；
(2) the residue aluminium-magnesium alloy that will be preheated to 50 DEG C ~ 200 DEG C joins in the most overheated aluminium alloy, and with uniform stirring, makes melt temperature prompt drop to 730 DEG C ~ 780 DEG C；
(3) addition accounts for the Mn of alloy gross mass 0.1% ~ 1%, stirs, pours into mold and get final product after standing 3-15 minute.
Aluminium-magnesium alloy the most according to claim 1, is characterized in that: alloying component (wt.%) consists of: Mg 4 ~ 11, Fe content is less than 0.6, and Cu content is less than 0.8, and Si content is less than 1.0, and remaining is aluminum.
Aluminium-magnesium alloy melt compounding method the most according to claim 1, is characterized in that: manganese and aluminum re-use after making aluminum-manganese alloy, aluminum-manganese alloy manganese content is 8 wt.% ~ 15wt.%.
Aluminium-magnesium alloy melt compounding method the most according to claim 1, it is characterized in that: be first superheated to 830 DEG C ~ 990 DEG C by the 60% ~ 80% of aluminium-magnesium alloy gross mass, insulation 10 ~ 20min, aluminium-magnesium alloy melt temperature adjusts according to alloying component difference, along with the content of magnesium is the highest, melt temperature reduces.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107760938A (en) * | 2017-10-24 | 2018-03-06 | 宝鸡金恒瑞金属科技有限公司 | A kind of bicycle frame and its production method |
| CN115874078A (en) * | 2022-12-08 | 2023-03-31 | 安徽兆鑫铝业科技有限公司 | Production method of cast aluminum curtain wall plate |
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- 2016-05-23 CN CN201610339987.9A patent/CN106011563A/en active Pending
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| CN107760938A (en) * | 2017-10-24 | 2018-03-06 | 宝鸡金恒瑞金属科技有限公司 | A kind of bicycle frame and its production method |
| CN115874078A (en) * | 2022-12-08 | 2023-03-31 | 安徽兆鑫铝业科技有限公司 | Production method of cast aluminum curtain wall plate |
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Application publication date: 20161012 |