High-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and preparation method thereof

A mg-al-ce-, wrought magnesium alloy technology, applied in the field of high-strength and high-plasticity Mg-Al-Ce-wrought magnesium alloy and its preparation, can solve the problems of limiting application, increasing alloy cost and density, and achieving a promotional position Effects of mis-nucleation, increase in work hardening rate, and improvement in alloy formability
CN113755730AActive Publication Date: 2021-12-07INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2021-12-07

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Abstract

The invention belongs to the field of nonferrous metal materials and machining thereof, and particularly relates to a high-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and a preparation method thereof. The high-strength and high-plasticity wrought magnesium alloy comprises the following components of, in percentage by mass, 0.1wt%-6.0 wt% of Al, 0.1wt%-3.0 wt% of Ce, 0wt%-3.0 wt% of Nd and the balance Mg and inevitable impurities, and the content of the impurities is less than or equal to 0.04 wt%. The high-strength and high-plasticity wrought magnesium alloy is prepared through a series of means such as melting, casting, homogenization treatment and backward extrusion. The wrought magnesium alloy with the submicron grain size is obtained by compositely adding Al, Ce and Nd elements and combining a backward extrusion process. In the extrusion process, high-density Mg17Al12, Al2Ce and Mg12Nd nano precipitated phases are dynamically precipitated and are partially dispersed and distributed on dislocation and grain boundaries (including small-angle grain boundaries), a remarkable precipitation strengthening effect is obtained, and the room-temperature mechanical property of the alloy is further improved.
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Description

Technical field:

[0001] The invention belongs to the field of non-ferrous metal materials and their processing, in particular to a high-strength and high-plasticity Mg-Al-Ce-(Nd) deformed magnesium alloy and a preparation method thereof. Background technique:

[0002] As the lightest metal structure material, the density of magnesium is only 1.74g / cm 3 , which is equivalent to 2 / 3 of aluminum and 1 / 4 of steel. It has the advantages of low density, high specific strength and rigidity, good electromagnetic shielding and shock absorption, and is the third most potential after steel and aluminum alloy. Metal structural materials, known as "green engineering metals in the 21st century", have been widely used in key equipment and major projects in our country. Especially in the fields of transportation and aerospace, the promotion and application of magnesium and its alloys can significantly reduce the weight of parts, improve fuel efficiency and save energy, thus alleviating the...

Claims

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