CN101985715A - High performance cast magnesium alloy and preparation method thereof - Google Patents
High performance cast magnesium alloy and preparation method thereof Download PDFInfo
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- CN101985715A CN101985715A CN 201010578170 CN201010578170A CN101985715A CN 101985715 A CN101985715 A CN 101985715A CN 201010578170 CN201010578170 CN 201010578170 CN 201010578170 A CN201010578170 A CN 201010578170A CN 101985715 A CN101985715 A CN 101985715A
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Abstract
The invention relates to a high performance cast magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components by weight percent: 8% of Zn, 6% of Al, 1-5% of Cu, 1.5% of Mn and 1% of Si, the balance of Mg. The preparation method thereof includes: burdening is carried out by the weight percent; Mg is smelted in a resistance furnace by adopting an iron crucible, then Zn, Al, Cu, Ca, Mn and Si are added, temperature is controlled to be 720-770 DEG C, N2 and SF6 are mixed to be taken as protective gas, and the obtained liquid metal is poured at the temperature of 710-750 DEG C; the obtained product is subject to solid solution for 3-6 hours at the temperature of 380-420 DEG C and then subject to aging for 10-20 hours at the temperature of 170-190 DEG C. The obtained high performance cast magnesium alloy has the tensile strength more than or equal to 320MPa and the elongation percentage more than or equal to 4%, has good comprehensive mechanical properties and can be widely applied to commercial parts, including automobile parts, electronic product parts and aeronautical parts.
Description
Technical field
The invention belongs to the magnesium alloy materials technical field, be specifically related to a kind of high performance casting magnesium alloy and preparation method thereof.
Background technology
Magnesium alloy has low density, high specific strength and lower advantages such as rigidity.Along with along with continuous progress in science and technology, the energy-saving and cost-reducing raising that requires reaches the pay attention to day by day to environmental protection, especially since implementing from calendar year 2001 household electrical appliances recirculation method, magnesium alloy with superior recirculation characteristic is just obtaining increasingly extensive application in fields such as automotive industry, communication electronic industry and aerospace industries, magnesium alloy output up to 20%, has demonstrated great application prospect in the annual growth in the whole world in recent years.
Since 20th century, the seventies, energy dilemma took place, the world car production was subjected to energy-conservation and promotions these two factors of environmental protection, and the Automobile Design brainstrust alleviates vehicle weight by every means, to reach the double effects that reduces petrol consumption and discharge amount of exhaust gas.Weight reduction just means the generation that reduces fuel consumption and reduced the contaminate environment discharge, so magnesium becomes one of the most attractive structured material of automobile " lightweight ".Because intensity is low, the magnesium alloy that is used for component such as automobile has to increase wall thickness, and the intensity that therefore improves magnesium alloy makes it have good comprehensive performances, is one of novel magnesium alloy hot of research and development.
In the research of high-strength magnesium alloy, solution strengthening, refined crystalline strengthening and the dispersion-strengthened etc. that magnesium alloy mainly produces by alloying element are used for improving the performance of magnesium alloy.The main alloy element of magnesium alloy has Al, Zn, Mn, Zr and rare earth element etc.Certainly, having some high performance magnesium alloy at present, is main adding elements with heavy rare earths or rare metal mostly, costs an arm and a leg, and can only be applied on military project or the aerospace.Therefore, the exploitation of current high-strength magnesium alloy should take into account high-performance and the factor of two aspects that reduce cost.
In existing the application, the occupancy volume of cast magnesium alloys reaches 90%, and on frock and Mould design, can adopt the sophisticated design experiences of aluminium alloy, even can reach the degree of exchange.Therefore, the developing low-cost cast Mg alloy with high strength is with a wide range of applications.
Summary of the invention
The invention provides a kind of high performance casting magnesium alloy and preparation method thereof, its objective is the high performance casting magnesium alloy of preparing tensile strength 〉=320MPa, unit elongation 〉=4%.
The present invention implements by the following technical programs:
The high performance casting magnesium alloy is characterized in that: component in the magnesium alloy and mass percent are: Zn 8%, and Al 6%, and Cu 1% ~ 5%, and Ca 1% ~ 5%, and Mn 1.5%, and Si 1%, and surplus is Mg.
Tensile strength 〉=the 320MPa of magnesium alloy.
The unit elongation of magnesium alloy 〉=4%.
The preparation method of high performance casting magnesium alloy is characterized in that: said method comprising the steps of:
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, is the ratio batching of Mg according to mass percent Zn 8%, Al 6%, Cu 1% ~ 5%, Ca 1% ~ 5%, Mn 1.5%, Si 1%, surplus;
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, 720 ℃ ~ 770 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas obtains liquid metal as shielding gas;
(3) casting: liquid metal 710 ℃ ~ 750 ℃ cast, is obtained foundry goods;
(4) thermal treatment: with the solid solution after 3 ~ 6 hours under 380 ℃ ~ 420 ℃ conditions of step (3) products therefrom, timeliness 10 ~ 20 hours under 170 ℃ ~ 190 ℃ conditions obtains the high performance casting magnesium alloy again.
Metal Ca adopts the porous bell jar to be pressed into.
During cast, under normal casting technique, model adopts metal mold or sand mold.
The high performance casting magnesium alloy of the inventive method preparation, tensile strength 〉=320MPa, unit elongation 〉=4% have good comprehensive mechanical properties, can be widely used in commercial components, comprise automobile component, electronic product components and space flight and aviation parts.
Description of drawings:
Fig. 1 is the stretching sample size of line cutting;
Fig. 2 is the stress-strain curve of the Mg8Zn6Al3Cu3Ca1.5Mn1Si magnesium alloy of embodiment 1 preparation.
Embodiment:
Describe the present invention below in conjunction with specific embodiment.
Embodiment 1:
The high performance casting magnesium alloy, chemical ingredients is by mass percentage: Zn 8%, Al 6%, Cu 3%, Ca 3%, Mn 1.5%, Si 1%, surplus are Mg.
The preparation method is as follows.
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, is the ratio batching of Mg according to mass percent Zn 8%, Al 6%, Cu 3%, Ca 3%, Mn 1.5%, Si 1%, surplus.
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, wherein Ca adopts the porous bell jar to be pressed into.750 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas is as shielding gas, per-cent meter by volume, N
295%, SF
65%, obtain liquid metal.
(3) casting: 730 ℃ of cast, under normal casting technique, model adopts metal mold with liquid metal.
(4) thermal treatment: with the solid solution after 4 hours under 400 ℃ of conditions of step (3) products therefrom, timeliness 15 hours under 180 ℃ of temperature condition obtains the high performance casting magnesium alloy again.
The magnesium alloy that obtains (Mg8Zn6Al3Cu3Ca1.5Mn1Si) tensile strength is 380MPa, and unit elongation is 4.6%.
The stress-strain curve of magnesium alloy (Mg8Zn6Al3Cu3Ca1.5Mn1Si) as shown in Figure 2.
The stretching sample adopts the line cutting sampling, sample size as shown in Figure 1, L1=40 wherein, L2=20, L3=12, L4=3, R1=4.5, φ 1=φ 2=3.
Embodiment 2:
The high performance casting magnesium alloy, chemical ingredients is by mass percentage: Zn 8%, Al 6%, Cu 3%, Ca 5%, Mn 1.5%, Si 1%, surplus are Mg.
The preparation method is as follows:
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, is the ratio batching of Mg according to mass percent Zn 8%, Al 6%, Cu 3%, Ca 5%, Mn 1.5%, Si 1%, surplus.
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, wherein Ca adopts the porous bell jar to be pressed into.770 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas is as shielding gas, per-cent meter by volume, N
295%, SF
65%; Obtain liquid metal.
(3) casting: 750 ℃ of cast, under normal casting technique, model adopts sand mold with liquid metal.
(4) thermal treatment: with the solid solution after 3 hours under 420 ℃ of conditions of step (3) products therefrom, timeliness 14 hours under 190 ℃ of temperature condition obtains the high performance casting magnesium alloy again.
The magnesium alloy that obtains (Mg8Zn6Al3Cu5Ca1.5Mn1Si) tensile strength is 370MPa, and unit elongation is 4.7%.
Embodiment 3:
The high performance casting magnesium alloy, chemical ingredients is by mass percentage: Zn 8%, Al 6%, Cu 1%, Ca 5%, Mn 1.5%, Si 1%, surplus are Mg.
The preparation method is as follows:
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, is the ratio batching of Mg according to mass percent Zn 8%, Al 6%, Cu 1%, Ca 5%, Mn 1.5%, Si 1%, surplus.
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, wherein Ca adopts the porous bell jar to be pressed into.720 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas is as shielding gas, per-cent meter by volume, N
295%, SF
65%; Obtain liquid metal.
(3) casting: 710 ℃ of cast, under normal casting technique, model adopts sand mold with liquid metal.
(4) thermal treatment: with the solid solution after 6 hours under 380 ℃ of conditions of step (3) products therefrom, timeliness 18 hours under 170 ℃ of temperature condition obtains the high performance casting magnesium alloy again.
The magnesium alloy that obtains (Mg8Zn6Al1Cu5Ca1.5Mn1Si) tensile strength is 390MPa, and unit elongation is 5%.
Embodiment 4:
The high performance casting magnesium alloy, chemical ingredients is by mass percentage: Zn 8%, Al 6%, Cu 3%, Ca 1%, Mn 1.5%, Si 1%, surplus are Mg.
The preparation method is as follows:
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, according to above-mentioned chemical ingredients batching, promptly Zn 8%, Al 6%, Cu 3%, Ca 1%, Mn 1.5%, Si 1%, surplus are the ratio batching of Mg by mass percentage.
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, wherein Ca adopts the porous bell jar to be pressed into.750 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas is as shielding gas, per-cent meter by volume, N
295%, SF
65%; Obtain liquid metal.
(3) casting: 730 ℃ of cast, under normal casting technique, model adopts sand mold with liquid metal.
(4) thermal treatment: with the solid solution after 5 hours under 400 ℃ of conditions of step (3) products therefrom, timeliness 13 hours under 180 ℃ of temperature condition obtains the high performance casting magnesium alloy again.
The magnesium alloy that makes (Mg8Zn6Al3Cu1Ca1.5Mn1Si) tensile strength is 330MPa, and unit elongation is 6.5%.
Claims (6)
1. high performance casting magnesium alloy, it is characterized in that: component in the magnesium alloy and mass percent are: Zn 8%, and Al 6%, and Cu 1% ~ 5%, and Ca 1% ~ 5%, and Mn 1.5%, and Si 1%, and surplus is Mg.
2. according to the described high performance casting magnesium alloy of claim 1, it is characterized in that: the tensile strength 〉=320MPa of magnesium alloy.
3. according to the described high performance casting magnesium alloy of claim 1, it is characterized in that: the unit elongation of magnesium alloy 〉=4%.
4. the preparation method of high performance casting magnesium alloy according to claim 1 is characterized in that: said method comprising the steps of:
(1) batching: raw material adopts metal M g, Metal Zn, metal A l, metal Cu, metal Ca, metal M n and Si, is the ratio batching of Mg according to mass percent Zn 8%, Al 6%, Cu 1% ~ 5%, Ca 1% ~ 5%, Mn 1.5%, Si 1%, surplus;
(2) melting: adopt iron crucible, melting in the conventional, electric-resistance stove, at first smelting metal Mg treats that metal M g all melts the back and adds Metal Zn, Al, Cu, Ca, Mn and Si, 720 ℃ ~ 770 ℃ of control smelting temperatures adopt N
2And SF
6Mixed gas obtains liquid metal as shielding gas;
(3) casting: liquid metal 710 ℃ ~ 750 ℃ cast, is obtained foundry goods;
(4) thermal treatment: with the solid solution after 3 ~ 6 hours under 380 ℃ ~ 420 ℃ conditions of step (3) products therefrom, timeliness 10 ~ 20 hours under 170 ℃ ~ 190 ℃ conditions obtains the high performance casting magnesium alloy again.
5. according to the preparation method of the described high performance casting magnesium alloy of claim 4, it is characterized in that: metal Ca adopts the porous bell jar to be pressed into.
6. according to the preparation method of the described high performance casting magnesium alloy of claim 4, it is characterized in that: during cast, under normal casting technique, model adopts metal mold or sand mold.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181761A (en) * | 2011-05-09 | 2011-09-14 | 方建静 | Novel magnesium alloy and preparation method thereof |
| CN105385920A (en) * | 2015-12-17 | 2016-03-09 | 山东省科学院新材料研究所 | Heated and reinforced high-strength cast magnesium alloy and preparation method thereof |
| CN109022981A (en) * | 2018-09-27 | 2018-12-18 | 中北大学 | A kind of preparation method of high-strength casting magnesium-zinc alloy ingot |
| CN114686738A (en) * | 2022-04-12 | 2022-07-01 | 重庆大学 | High-strength high-modulus magnesium-based multi-component light alloy and preparation method thereof |
| CN115537620A (en) * | 2021-06-30 | 2022-12-30 | 比亚迪股份有限公司 | Die-casting magnesium alloy and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469937A (en) * | 2000-09-26 | 2004-01-21 | High strength magnesium alloy and its preparation method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469937A (en) * | 2000-09-26 | 2004-01-21 | High strength magnesium alloy and its preparation method |
Non-Patent Citations (2)
| Title |
|---|
| 《中国硕士论文全文数据库 工程科技I辑》 20101015 王其龙 砂型铸造Mg-10Gd-3Y-Zr合金的组织和性能研究 第28-30页 4-6 , 第10期 2 * |
| 《特种铸造及有色合金》 20080120 翁慧茹等 超高强度铸造镁合金的研究 第71-73页 1-6 第28卷, 第1期 2 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181761A (en) * | 2011-05-09 | 2011-09-14 | 方建静 | Novel magnesium alloy and preparation method thereof |
| CN102181761B (en) * | 2011-05-09 | 2012-07-04 | 方建静 | Novel magnesium alloy and preparation method thereof |
| CN105385920A (en) * | 2015-12-17 | 2016-03-09 | 山东省科学院新材料研究所 | Heated and reinforced high-strength cast magnesium alloy and preparation method thereof |
| CN105385920B (en) * | 2015-12-17 | 2017-08-25 | 山东省科学院新材料研究所 | A kind of heat treatment reinforcement cast Mg alloy with high strength and preparation method thereof |
| CN109022981A (en) * | 2018-09-27 | 2018-12-18 | 中北大学 | A kind of preparation method of high-strength casting magnesium-zinc alloy ingot |
| CN115537620A (en) * | 2021-06-30 | 2022-12-30 | 比亚迪股份有限公司 | Die-casting magnesium alloy and preparation method and application thereof |
| CN115537620B (en) * | 2021-06-30 | 2024-02-27 | 比亚迪股份有限公司 | Die-casting magnesium alloy and preparation method and application thereof |
| CN114686738A (en) * | 2022-04-12 | 2022-07-01 | 重庆大学 | High-strength high-modulus magnesium-based multi-component light alloy and preparation method thereof |
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