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A medium-strength heat-resistant magnesium alloy

A magnesium alloy, heat-resistant technology, applied in the field of magnesium alloys, can solve the problems of backward application of magnesium alloys, poor heat resistance, and high alloy cost, and achieve the effects of hindering the growth of aging precipitates, good thermal stability, and high melting point

Active Publication Date: 2016-04-06
湖南镁宇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current application of magnesium alloys is far behind that of steel and aluminum alloys. One of the reasons is that its heat resistance is poor. The strength of general magnesium alloys will drop significantly after the temperature exceeds 120 ° C. Although since the 1940s Some rare earth magnesium alloys with excellent high temperature performance have been developed successively, such as WE43, WE54, etc., but these alloys contain a large proportion of precious rare earth elements, resulting in higher alloy costs

Method used

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  • A medium-strength heat-resistant magnesium alloy
  • A medium-strength heat-resistant magnesium alloy
  • A medium-strength heat-resistant magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1 The chemical composition of the magnesium alloy is: 8.24% by weight of aluminum, 0.41% by weight of zinc, 0.15% by weight of manganese, 0.034% by weight of silver, 0.016% by weight of cerium, 0.0011% by weight of calcium, and the rest For magnesium and unavoidable impurities in the casting process. Magnesium alloy ingots were prepared by semi-continuous casting. After homogenization annealing, forging, rolling and aging treatment, tensile tests were done at room temperature and 150°C to obtain tensile strength, yield strength and elongation. The specific data are shown in the table 1.

Embodiment 2

[0009] Example 2 The chemical composition of the magnesium alloy is: 8.22% by weight of aluminum, 0.4% by weight of zinc, 0.14% by weight of manganese, 0.032% by weight of silver, 0.015% by weight of lanthanum, 0.0032% by weight of calcium, and the rest For magnesium and unavoidable impurities in the casting process. After the magnesium alloy ingot is prepared by the semi-continuous casting method, after homogenization annealing, forging, rolling and aging treatment, the tensile test at room temperature and 150°C is carried out to obtain the tensile strength, yield strength and elongation. The specific data are shown in the table 2.

Embodiment 3

[0010] Example 3 The chemical composition of the magnesium alloy is: 8.02% by weight of aluminum, 0.44% by weight of zinc, 0.12% by weight of manganese, 0.030% by weight of silver, 0.019% by weight of neodymium, 0.015% by weight of calcium, and the rest For magnesium and unavoidable impurities in the casting process. After the magnesium alloy ingot is prepared by the semi-continuous casting method, after homogenization annealing, forging, rolling and aging treatment, the tensile test at room temperature and 150°C is carried out to obtain the tensile strength, yield strength and elongation. The specific data are shown in the table 3.

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Abstract

The invention involves a medium -to -strong heat -resistant magnesium alloy.The quality of the alloy is scored: aluminum: 7.5-9.0%, silver: 0.02-0.80%, zinc: 0.35-0.55%, rare earth: 0.01-0.10%, calcium: 0.001-0.020%, manganese: 0.05-0.20%, the rest ofFor magnesium and irregular impurities.Adding rare earth elements can significantly improve the intensity of magnesium alloy; adding appropriate amounts of silver and calcium can effectively improve the high temperature performance of the alloy.This alloy is ≥350MPa in the T5 state temperature, the yield strength ≥210MPa, and the elongation rate ≥6%;The structural parts of high -temperature service conditions in the field of automobile industry are required to meet the requirements of aviation, aerospace and automotive industry.

Description

technical field [0001] The invention relates to the field of magnesium alloys, in particular to a medium-strength heat-resistant magnesium-aluminum-silver-zinc magnesium alloy. Background technique [0002] Magnesium alloy is currently the lightest metal structure material available, with the characteristics of low density, high specific strength and high specific stiffness, and excellent damping performance. It has been used in aviation, aerospace and automobile industries for many years. However, the current application of magnesium alloys is far behind that of steel and aluminum alloys. One of the reasons is that its heat resistance is poor. The strength of general magnesium alloys will drop significantly after the temperature exceeds 120 ° C. Although since the 1940s Some rare earth magnesium alloys with excellent high temperature performance have been developed successively, such as WE43, WE54, etc., but these alloys contain a large proportion of precious rare earth ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02
Inventor 刘楚明蒋树农肖宏超万迎春
Owner 湖南镁宇科技有限公司
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