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Tireining Mg-Al-Ca creep resisting alloy and fusion casting technique

A magnesium alloy, anti-creep technology, applied in the field of magnesium alloy and its melting and casting process, can solve the problems of casting performance and mechanical performance at room temperature, etc., and achieve the effect of solving poor room temperature performance and casting performance, low cost and simple process

Inactive Publication Date: 2005-01-12
SHANGHAI AIERSI LIGHT ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to propose a Ti-refined Mg-Al-Ca creep-resistant magnesium alloy and its melting and casting process, and to overcome the reduction of casting performance and room temperature mechanical properties caused by simple addition of Ca by adding Ti deficiencies, while refining the coarse Al through Ti 2 Ca phase, which further improves the creep resistance of the alloy and expands the application range of Ca-containing magnesium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The composition (percentage by weight) of the alloy is: 8.0% Al, 3.0% Ca, 0.6% Ti, 0.2% Mn, the impurity element is less than 0.02%, and the rest is Mg.

[0020] The specific steps of the melting and casting process of the alloy are as follows: (1) configure the alloy according to the above ingredients, add 10 kg of industrial pure magnesium into the resistance crucible furnace, heat and melt, and use SF6 0.5% / CO 2 Mixed gas protection; (2) After the magnesium is completely melted, press 0.35Kg of industrial pure calcium with a bell jar at 650°C; (3) Add 0.07Kg of industrial pure aluminum and 0.25Kg of Al-10Mn master alloy at 700°C; (4 ) Add 0.70Kg of Al-10Ti master alloy at 750°C, keep it warm for 15 minutes and then stir for 2-5 minutes to promote the full melting of Ti; (5) Continue to keep warm at 750°C for about 15 minutes. Stir the alloy liquid with a tool to make the composition uniform, cool down to the pouring temperature of 720-730°C and let it stand for 10 mi...

Embodiment 2

[0022] The composition (percentage by weight) of the alloy is: 5.0% Al, 1.0% Ca, 0.2% Ti, 0.2% Mn, the impurity element is less than 0.02%, and the rest is Mg.

[0023] The specific steps of alloy melting and casting process are as follows: (1) configure the alloy according to the above ingredients, add 10 kg of industrial pure magnesium into the kerosene crucible furnace, heat and melt, and protect it with covering agent at the same time; (2) after the magnesium is completely melted, heat Press in 0.12Kg of industrial pure calcium with a bell jar; (3) Add 0.14Kg of industrial pure aluminum and 0.2Kg of Al-10Mn master alloy at 700°C; (4) Add 0.2Kg of Al-10Ti master alloy at 750°C and keep warm for 15 minutes Then stir for 2-5 minutes to promote the full melting of Ti; (5) Continue to keep warm at 750°C for about 15 minutes. After all the alloying elements are dissolved, stir the alloy liquid with a tool to make the ingredients uniform, and cool down to 720-730°C for pouring St...

Embodiment 3

[0025] The composition (percentage by weight) of the alloy is: 4.0% Al, 0.5% Ca, 0.05% Ti, 0.2% Mn, the impurity element is less than 0.02%, and the rest is Mg.

[0026] The specific steps of alloy melting and casting process are as follows: (1) Configure the alloy according to the above ingredients, add 10 kg of industrial pure magnesium into the resistance crucible furnace, heat and melt, and use SF 6 0.5% / CO 2 Mixed gas protection; (2) After the magnesium is completely melted, press in 0.06Kg of industrial pure calcium with a bell jar at 650'; (3) Add 0.14Kg of industrial pure aluminum and 0.25Kg of Al-10Mn master alloy at 700°C; (4 ) Add 0.06Kg of Al-10Ti master alloy at 750°C, keep warm at 750°C for 15 minutes and then stir for 2 to 5 minutes to promote the full melting of Ti; After dissolving, stir the alloy liquid with a tool to make the composition uniform, cool down to the pouring temperature of 720-730°C and let it stand for 10 minutes, then remove the scum on the ...

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Abstract

A fine Ti Mg-Al-Ca anti-creep Mg alloy is used in metal materials and smelt. Composition and its weight percentage is: Al 3-9%, Ca0.5-3%, Ti 0.05-0.6%, Mn 0.1-0.4%, impurity is less than 0.02%, the rest is Mg. the smelt and cast goes as follows: The smelting is undergone under the protection of gas or covering agent, after the industrial pure Mg is melted completely, it is added with alloy elements Ca, Al, Mn and Ti in the way of industrial pure Ca, industrial pure Al, Al-Mn mid-alloy, and Al-Ti mid-alloy to be mixed uniformly after all the alloy elements are solved and casted after taking a way the surface slags.

Description

technical field [0001] The invention relates to a magnesium alloy and its melting and casting process, in particular to a Ti-refined Mg-Al-Ca creep-resistant magnesium alloy and its melting and casting process. Used in the field of metal materials and metallurgy. Background technique [0002] Mg-Al-based AZ91D, AM50A and AM60B are the most widely used magnesium alloys in industry, with excellent mechanical properties at room temperature, good casting performance, and low cost. However, the high-temperature strength and creep properties of these alloys are poor, and the long-term service temperature does not exceed 120°C, which greatly limits the application range of magnesium alloys. Although some heat-resistant magnesium alloys have been developed, such as American brands AE42, WE43, etc., these magnesium alloys usually contain relatively high content of rare earth elements, which greatly increases the cost of the alloy on the one hand, and poor casting performance on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04C22C1/02C22C23/02
Inventor 刘满平王渠东曾小勤卢晨丁文江
Owner SHANGHAI AIERSI LIGHT ALLOY