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Heatproof magnesium sannum silver alloy and preparation method thereof

A technology of silver alloy and tin-based alloy, applied in the field of new heat-resistant magnesium-tin-silver alloy and its smelting and heat treatment process, can solve the problems of slow over-aging, insufficient aging peak value and insufficient thermal stability, and save equipment. Cost, effect of good thermal stability

Inactive Publication Date: 2012-02-22
TSINGHUA UNIV
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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 provide a heat-resistant magnesium-tin-silver alloy and its preparation method for overcoming the disadvantages of existing alloys, especially magnesium-tin alloys, that the aging peak value is not high enough and the thermal stability is not good enough. By improving the composition and heat treatment process, the It has the characteristics of obvious aging strengthening effect, less addition of alloy elements, slow overaging, and good thermal stability of the structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The component of magnesium-tin-silver alloy is made up of five kinds of elements of magnesium, tin, silver, manganese and zinc; The mass percent of each component content is:

[0025] Tin (Sn): 6%

[0026] Silver (Ag): 1.5%

[0027] Manganese (Mn): 0.5%

[0028] Zinc (Zn): 0.5%

[0029] The balance is magnesium (Mg).

[0030] The preparation method of the present embodiment comprises the following steps:

[0031] Step 1: Smelting

[0032] (1) Dosing according to the following raw materials and mass percentage content: 6% tin, 1.5% silver, 0.5% manganese, 0.5% zinc, and the rest are magnesium blanks; wherein manganese is in the form of a magnesium-manganese master alloy containing more than 2% manganese Added, the remaining raw materials are pure elements, and the purity of each raw material is 99.99%. Then the prepared ingredients are preheated to 150°C in an oven, and the RJ-2 covering agent that accounts for 2% of the total weight of the prepared m...

Embodiment 2

[0041] Embodiment 2: the component of magnesium-tin-silver alloy is made up of magnesium, tin, silver, manganese four kinds of elements; The mass percent of each component content is:

[0042] Tin (Sn): 7%

[0043] Silver (Ag): 2%

[0044] Manganese (Mn): 0.4%

[0045] The remainder is magnesium (Mg).

[0046] The preparation method of the present embodiment comprises the following steps:

[0047] Step 1: Smelting

[0048] (1) Dosing according to the following components and mass percentage content: 7% tin, 2% silver, 0.4% manganese, and the rest are magnesium; wherein manganese is added in the form of a magnesium-manganese master alloy containing more than 2% manganese, and the rest of the raw materials are Pure elements, the purity of raw materials are 99.99%. Then the prepared ingredients are preheated to 150°C in an oven, and the RJ-2 covering agent that accounts for 2wt% of the total weight of the prepared magnesium-tin-silver alloy is put into the oven and baked; th...

Embodiment 3

[0057] Embodiment 3: the component of magnesium-tin-silver alloy is made up of five kinds of elements of magnesium, tin, silver, manganese and zinc; The mass percent of each component content is:

[0058] Tin (Sn): 6.5%

[0059] Silver (Ag): 1%

[0060] Manganese (Mn): 0.2%

[0061] Zinc (Zn): 1%

[0062] The balance is magnesium (Mg).

[0063] The preparation method of the present embodiment comprises the following steps:

[0064] Step 1: Smelting

[0065] (1) Dosing according to the following components and mass percentage content: 6.5% tin, 1% silver, 0.2% manganese, 1% zinc, and the rest are magnesium; wherein manganese is added in the form of a magnesium-manganese master alloy containing more than 2% manganese, and the rest The raw materials are pure elements, and the purity of the raw materials is 99.99%. Then the prepared ingredients are preheated to 150°C in an oven, and the RJ-2 covering agent that accounts for 2wt% of the total weight of the prepared magnesium-...

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Abstract

The invention relates to heatproof magnesium stannum silver alloy and a preparation method thereof, which belongs to metal structural materials and the field of preparation technology. The ingredient of the magnesium stannum silver alloy is composed of four elements of magnesium, stannum, silver and manganese or five elements of magnesium, stannum, silver, manganese and zinc. The mass percentage of the content of each ingredient is stannum (Sn) of 6% to 7%, silver (Ag) of 1% to 2%, manganese (Mn) of 0.2 % to 0.5%, zinc (Zn) of 0% to 1.0% and magnesium of the rest. The preparation method comprises steps of sequentially placing all ingredients in a crucible, heating, stirring, standing to form alloy liquid, pouring into cold molds to form blanks of the magnesium stannum silver alloy, heating in the air, quenching in cold water to obtain homogenized magnesium stannum silver alloy and finally performing aging hot treatment in the air and quenching in cold water to achieve the heatproof magnesium stannum silver alloy. The magnesium stannum silver alloy is small in content of elements and simple in smelting technology. Under 200 DEG C, the aging peak value can reach more than 84 HV. Aging of 700 hours, hardness can keep above 77 HV. Thus, high temperature tissues are stable, and commercial potentiality is provided.

Description

technical field [0001] The invention belongs to the technical field of metal structural materials and preparation, in particular to a novel heat-resistant magnesium-tin-silver alloy strengthened by aging and its melting and heat treatment process. Background technique [0002] Magnesium alloy is the lightest metal structure material with high specific strength and specific stiffness, excellent damping performance and electromagnetic shielding performance, so it is widely used in aerospace, transportation, electronic products and other fields. The development of high-performance magnesium alloys has become a hot spot in the field of metal materials in various countries in recent years. At present, the most commonly used commercial magnesium alloy is magnesium-aluminum series, such as AZ91, but because the thermodynamic structure of this alloy is unstable at high temperature, it can only be used in occasions below 150 °C, which cannot meet the requirements of many working cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
Inventor 黄雪飞张文征
Owner TSINGHUA UNIV
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