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Preparation method of heat-resistant magnesium-aluminum-zinc alloy casting

A technology of alloy castings, magnesium, aluminum and zinc, applied in the field of magnesium alloy processing, can solve the problems of high heat resistance and cost, and achieve the effects of improving corrosion resistance, high temperature resistance, and good chemical stability

Inactive Publication Date: 2021-03-16
安徽军明机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing heat-resistant magnesium-aluminum-zinc alloy castings in view of the existing problem of high cost of using rare earth elements to improve the heat resistance of magnesium-aluminum-zinc alloys

Method used

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  • Preparation method of heat-resistant magnesium-aluminum-zinc alloy casting

Examples

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Effect test

Embodiment 1

[0018] A method for preparing a heat-resistant magnesium-aluminum-zinc alloy casting, comprising the following steps:

[0019] (1) Mixture preparation: by weight, 24 parts of magnesium chloride, 6 parts of cerium carbonate, 2.5 parts of zinc carbonate, and 3.5 parts of cadmium chloride were heated in a crucible to 790°C, stirred evenly, poured into blocks, crushed and ground Powder 1, add 1.5 parts of cobalt boroacylate and 0.5 part of beryllium chloride and mix in a ball mill to obtain a mixture for subsequent use;

[0020] The mixing conditions in the ball mill are as follows: vacuumize the ball mill and fill it with argon, and mix for 4 hours at a ball-to-material ratio of 25:1 and a rotational speed of 400°C;

[0021] (2) Preparation of reinforcing agent: Take 14 parts of pure aluminum and melt it in a protective atmosphere in a crucible. When the temperature of the pure aluminum melt reaches 730°C, add 3 parts of spare mixing agent and stir under the electromagnetic power...

Embodiment 2

[0029] A method for preparing a heat-resistant magnesium-aluminum-zinc alloy casting, comprising the following steps:

[0030] (1) Mixture preparation: In parts by weight, heat 22 parts of magnesium chloride, 8 parts of cerium carbonate, 2 parts of zinc carbonate, and 6 parts of cadmium chloride in a crucible to 780°C, stir evenly, pour into blocks, break and grind Powder 1, add 1 part of cobalt boroacylate and 0.6 part of beryllium chloride and mix in a ball mill to obtain a mixture for later use;

[0031] The mixing conditions in the ball mill are as follows: vacuumize the ball mill and fill it with argon, and mix for 5 hours at a ball-to-material ratio of 30:1 and a rotational speed of 350°C;

[0032] (2) Preparation of reinforcing agent: Take 16 parts of pure aluminum and melt it in a protective atmosphere in a crucible. When the temperature of the pure aluminum melt reaches 720°C, add 5 parts of spare mixing agent and stir for 20 Minutes, cast into blocks in a vacuum env...

Embodiment 3

[0040] A method for preparing a heat-resistant magnesium-aluminum-zinc alloy casting, comprising the following steps:

[0041] (1) Mixture preparation: In parts by weight, heat 26 parts of magnesium chloride, 4 parts of cerium carbonate, 3 parts of zinc carbonate, and 1 part of cadmium chloride in a crucible to 800°C, stir evenly, pour into blocks, break and grind Powder 1, add 2 parts of cobalt boroacylate and 0.4 part of beryllium chloride and mix in a ball mill to obtain a mixture for later use;

[0042] The mixing conditions in the ball mill are as follows: vacuumize the ball mill and fill it with argon, and mix for 3 hours at a ball-to-material ratio of 20:1 and a rotational speed of 450°C;

[0043] (2) Preparation of reinforcing agent: Take 12 parts of pure aluminum and melt them in a protective atmosphere in a crucible. When the temperature of the pure aluminum melt reaches 40°C, add 1 part of the spare mixing agent and stir for 20 Minutes, cast into blocks in a vacuum...

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Abstract

The invention belongs to the technical field of magnesium alloy processing, and particularly relates to a preparation method of a heat-resistant magnesium-aluminum-zinc alloy casting. The preparationmethod comprises the following steps: preparing a mixing agent, preparing a reinforcing agent, and preparing the magnesium-aluminum-zinc alloy casting. Compared with the prior art, the reinforcing agent has the following advantages that the prepared reinforcing agent is good in chemical stability, harmful gas cannot be generated, the reinforcing agent and AZ91 magnesium alloy are prepared in a composite mode, and the obtained alloy is fine in grain, uniform in distribution and good in mechanical property and physical property; by adding cobalt and beryllium, a structure with high thermal stability can be obtained, and the creep resistance and high temperature resistance of the alloy are improved; and compared with rare earth elements and precious metals in the prior art, elements used by the reinforcing agent can reduce the production cost of the alloy and are suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy processing, and in particular relates to a preparation method of a heat-resistant magnesium-aluminum-zinc alloy casting. Background technique [0002] Magnesium alloys have attracted much attention because of their light weight. They also have high dimensional stability, damping performance, electromagnetic shielding performance, excellent casting and cutting performance, and easy recycling and regeneration. They are widely used in automobiles, electronics, etc. Communications, aerospace and national defense have broad application prospects. Magnesium-aluminum-zinc magnesium alloys have excellent mechanical properties, good fluidity, small thermal cracking tendency, simple casting process, and low cost. It is very easy to oxidize and burn during the process, and its elastic modulus is small, its high-temperature strength and creep resistance are low, and its wear resistance and corrosion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C23/02C22C23/04C22C1/10C22C1/02B22D1/00C22F1/06
CPCB22D1/002C22C1/06C22C1/1036C22C23/02C22C23/04C22F1/06
Inventor 王辅成
Owner 安徽军明机械制造有限公司
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