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Heat-resisting wear-resisting magnesium alloy and preparation method thereof

A magnesium alloy, heat-resistant technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as production inclusions, affecting the application of magnesium alloy materials, complex alloy melting and casting processes, etc.

Active Publication Date: 2016-04-13
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the alloy is prone to intragranular segregation and loose shrinkage during casting, and the melting and casting process of the alloy is relatively complicated, there are serious inclusion problems in production, and the hot cracking tendency is serious, resulting in its high temperature strength. Meet the use requirements in some special environments
[0003] In addition, due to the special properties of magnesium alloys, magnesium alloys are extremely susceptible to corrosion, easy to deform after being heated, and have poor wear resistance, which affects the further application of magnesium alloy materials. In view of this, this paper Based on the study of the composition ratio of magnesium alloys, the researchers explored the preparation process of magnesium alloys to form a protective film on the surface of the obtained magnesium alloys, providing a new product for the field of magnesium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A heat-resistant and wear-resistant magnesium alloy, the components are Zn2.1%, Zr0.6%, Er3.1%, Nd0.7%, Si0.01%, Al11%, Ni6%, and the balance is Mg and essential impurities.

[0024] The preparation method of the heat-resistant and wear-resistant magnesium alloy includes the steps of smelting and heat treatment, specifically including the following steps:

[0025] (1) Mg is heated and smelted into liquid magnesium in a smelting furnace, and in the smelting process, sulfur hexafluoride-nitrogen mixed gas is used as a protective gas;

[0026] (2) Control the temperature of liquid magnesium to 600°C, add Al and Ni components to it, heat preservation treatment for 10 minutes, then add Zn, Zr, Er, Nd, Si to it, and adjust the temperature to 780°C, heat preservation treatment 10min, then lower the temperature to 700°C in 10s, refine for 7min, and let it stand for 10min. After the magnesium liquid is cooled to a temperature of 660°C, remove the scum and cast, cool to room tem...

Embodiment 2

[0034] A heat-resistant and wear-resistant magnesium alloy, the components are Zn3.5%, Zr0.9%, Er4.2%, Nd1.3%, Si0.08%, Al13%, Ni8%, and the balance is Mg and essential impurities.

[0035] The preparation method of the heat-resistant and wear-resistant magnesium alloy includes the steps of smelting and heat treatment, specifically including the following steps:

[0036] (1) Mg is heated and smelted into liquid magnesium in a smelting furnace, and in the smelting process, sulfur hexafluoride-nitrogen mixed gas is used as a protective gas;

[0037] (2) Control the temperature of liquid magnesium to 650°C, add Al and Ni components to it, heat preservation treatment for 20 minutes, then add Zn, Zr, Er, Nd, Si to it, and adjust the temperature to 800°C, heat preservation treatment 20min, then lower the temperature to 740°C in 20s, refine for 9min, and let stand for 20min. After the magnesium liquid is cooled to 680°C, remove the scum and cast, cool to room temperature, and obtain...

Embodiment 3

[0045] A heat-resistant and wear-resistant magnesium alloy, the components are Zn2.7%, Zr0.8%, Er3.7%, Nd0.9%, Si0.06%, Al12%, Ni7%, and the balance is Mg and essential impurities.

[0046] The preparation method of the heat-resistant and wear-resistant magnesium alloy includes the steps of smelting and heat treatment, specifically including the following steps:

[0047] (1) Mg is heated and smelted into liquid magnesium in a smelting furnace, and in the smelting process, sulfur hexafluoride-nitrogen mixed gas is used as a protective gas;

[0048] (2) Control the temperature of liquid magnesium to 630°C, add Al and Ni components to it, heat preservation treatment for 15 minutes, then add Zn, Zr, Er, Nd, Si to it, and adjust the temperature to 790°C, heat preservation treatment 15min, then lower the temperature to 730°C in 15s, refine for 8min, and let stand for 15min. After the magnesium liquid is cooled to a temperature of 670°C, remove the scum and cast, cool to room temper...

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Abstract

The invention relates to the technical field of magnesium alloy materials, in particular to heat-resisting wear-resisting magnesium alloy and a preparation method thereof. By design on the proportion of magnesium alloy components, all magnesium alloy components act on one another, so that while the toughness of the magnesium alloy is improved, the strength of the magnesium alloy is improved, and the wear resisting performance of the magnesium alloy is improved; by definition on magnesium alloy preparation process steps and process parameters, Al-Ni phase is formed in the magnesium alloy, so that the toughness of the magnesium alloy is improved, and the wear resisting performance of the magnesium alloy is improved; in combination with the treatment of an acetone-ethanol mixed liquor, a layer of organic phase is contained on the surface of the magnesium alloy, so that a function of removing impurities on the surface of the magnesium alloy is achieved, a catalytic action is exerted, the wear resisting performance of the magnesium alloy is improved after the magnesium alloy is immersed into a cerium salt conversion solution and an oxygen-carbon-sulfur co-penetrated liquid dissolved with organic silicon in combination with a phosphating solution, the film structure on the surface of the magnesium alloy is strengthened, the heat resisting effect of the film structure is enhanced, and the heat resisting performance of the magnesium alloy is improved.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy materials, in particular to a heat-resistant and wear-resistant magnesium alloy and a preparation method thereof. Background technique [0002] With the development of science and technology, the design of various products is now moving towards the goal of light weight and environmental protection. Therefore, a considerable degree of consideration needs to be given to the development of product materials and the selection of characteristics. As the lightest metal structural material, magnesium alloy has high specific strength and specific stiffness, excellent damping performance, good casting performance and machining performance. It is known as "the green structural material of the 21st century" and has a wide range of applications prospect. Among the commonly used grades of cast magnesium alloys, ZK60 alloy has been widely used in industry due to its excellent mechanical properties at r...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/02C23C22/57C23C8/52C23C22/60
Inventor 李翔光于丹俞开升敖四海谢懿陈春喜陈寅王昌明
Owner 贵州航天风华精密设备有限公司
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