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High strength and high hardness magnesium alloy and manufacturing method thereof

A high-hardness, high-strength technology, applied in the field of high-strength and high-hardness magnesium alloys, can solve the problems of limiting the application of magnesium and magnesium alloys, and the difficulty in meeting the requirements for strength and hardness of magnesium and magnesium alloys, so as to broaden the scope of use and improve hardness , the effect of low production cost

Inactive Publication Date: 2010-10-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these parts have certain requirements for strength and wear resistance, but the strength and hardness of magnesium and magnesium alloys are difficult to meet the requirements. The strength of ordinary high-strength magnesium alloys is generally lower than 350MPa, and the hardness is lower than HB100, which greatly limits the strength and hardness of magnesium and magnesium alloys. Application of Magnesium Alloys in Related Industries

Method used

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  • High strength and high hardness magnesium alloy and manufacturing method thereof
  • High strength and high hardness magnesium alloy and manufacturing method thereof
  • High strength and high hardness magnesium alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get 14.6 grams of magnesium, 16.2 grams of aluminum, 33 grams of manganese, 38.4 grams of copper, and 39 grams of zinc, and melt according to the above method to make a high-strength and high-hardness magnesium alloy. The obtained alloy ingot was measured by a microhardness tester (load 9.807N, time 20 seconds), and the hardness was HV440 (HB415). Annealed for 1 hour at a temperature of 730K, the hardness is HV439 (HB415). The obtained alloy ingot was compressed and measured by a Gleeble 1500 thermal simulation testing machine, and the strength was 428.3 MPa, and the elongation was 3.3%. The density measured by drainage method is 4.2g / cm 3 .

Embodiment 2

[0032] Get 21.2 grams of magnesium, 12.2 grams of aluminum, 24.8 grams of manganese, 28.8 grams of copper, and 29.3 grams of zinc, and melt them into high-hardness magnesium alloys according to the above method. The obtained alloy ingot was measured by a microhardness tester (load 9.807N, time 20 seconds), and the hardness was HV315 (HB300). Annealed for 1 hour at a temperature of 730K, the hardness is HV313 (HB296). The obtained alloy ingot was compressed and measured by a Gleeble 1500 thermal simulation testing machine, and the strength was 436.9MPa, and the elongation was 3.4%. The density measured by drainage method is 3.3g / cm 3 .

Embodiment 3

[0034] Get 25.7 grams of magnesium, 9.6 grams of aluminum, 19.5 grams of manganese, 22.7 grams of copper, and 23.8 grams of zinc, and melt them into high-hardness magnesium alloys according to the above method. The obtained alloy ingot was measured by a microhardness tester (load 9.807N, time 20 seconds), and the hardness was HV256 (HB244). Annealed for 1 hour at 730K, the hardness is HV226 (HB188). The obtained alloy ingot was compressed and measured by a Gleeble 1500 thermal simulation testing machine, and the strength was 491.3 MPa, and the elongation was 3.7%. The density measured by drainage method is 2.5g / cm 3 .

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Abstract

The invention relates to a high strength and high hardness magnesium alloy and a manufacturing method thereof. The magnesium alloy comprises magnesium, aluminum, manganese, copper and zinc, among which, atomic percent of magnesium ranges from 20% to 50%, the rest components have equal atomic percent; the method comprises: melting the components by the stir-casting method in an electromagnetic induction furnace; adopting argon shield in the process of melting and casting; controlling the melting temperature within the range of 1000-1200 DEG C and ensuring the casting temperature to be room temperature. The high strength and high hardness magnesium alloy features obviously better strength and specific strength than ordinary magnesium alloy and good performance by binding magnesium metal andmagnesium alloy. The magnesium alloy of the invention can be applied to manufacturing bearing components in the fields such as aero-space and automotive industry, special magnesium alloy with fine wear-resisting property or clad on the surface of conventional magnesium alloy to improve the wear-resisting property thereof. The invention features simple production process, no need of special devices and has the advantage of low production cost.

Description

technical field [0001] The invention relates to a high-strength and high-hardness magnesium alloy, in particular to a high-strength and high-hardness magnesium alloy which can be used for preparing load-bearing components in aerospace and automobile industries and a preparation method. technical background [0002] Magnesium alloy is the lightest structural material in practical application, its density is only 2 / 3 of aluminum and 1 / 5 of steel. Its specific strength and specific stiffness can reach or exceed steel and aluminum alloy. Magnesium alloys also have good thermal conductivity, electromagnetic shielding, and vibration resistance; magnesium alloys are non-toxic and non-polluting to the environment, and the cost of recycling is low; and magnesium reserves are extremely rich on the earth, accounting for about 2.7% of the mass of the earth's crust , the mass content of magnesium in seawater reaches 0.13%. Therefore, magnesium alloy is regarded as a new material to rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C30/06C22C1/02B22D21/04
Inventor 高家诚李锐王勇范科
Owner CHONGQING UNIV