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Preparation method of high-performance magnesium alloy plate with double-phase structure

A dual-phase structure, magnesium alloy technology, applied in the field of high-performance magnesium alloy sheet preparation, can solve the problems of poor high-temperature mechanical properties and stability, low sheet yield, long rolling process, etc., to achieve higher mechanics and yield. High and shortened rolling process effect

Inactive Publication Date: 2014-03-19
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a high-performance magnesium alloy plate with a dual-phase structure, which solves the problems of poor high-temperature mechanical properties and stability of the magnesium alloy under the deformation condition of the rolling process, low yield of the plate, and problems caused by rolling. Problems such as long process

Method used

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  • Preparation method of high-performance magnesium alloy plate with double-phase structure
  • Preparation method of high-performance magnesium alloy plate with double-phase structure
  • Preparation method of high-performance magnesium alloy plate with double-phase structure

Examples

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Embodiment 1

[0027] The preparation process of dual-phase high-performance Mg-13Al-4Zn-7Ca-1Mn-2Nd magnesium alloy rolling plate: industrial pure nitrogen is used as the atomizing gas of magnesium alloy, the atomizing gas pressure is about 0.6-0.9MPa, the melt The temperature is 760-830°C. After the alloy liquid is raised to about 800°C, it is sprayed. The deposited billet after spraying is subjected to hot extrusion pre-deformation. The extrusion ratio is about 9:1, and the extrusion temperature is 350°C. The billet is used as a hot-rolled billet. The deposited slab was heated before rolling at a temperature of 350°C and a holding time of 30 minutes. During the rolling process, the reduction in passes is between 5% and 15%, the rolling temperature is 300-400°C, and the temperature of the rolls is heated to about 200°C. After rolling, the structure of the magnesium alloy plate is uniform and fine, the grain size is between 5 and 10 μm, the tensile strength at room temperature is 435 MPa, ...

Embodiment 2

[0029]The preparation process of dual-phase high-performance Mg-5Al-4Zn-7Ca-1Mn-1Nd magnesium alloy rolled plate: industrial pure nitrogen is used as the atomizing gas of magnesium alloy, the atomizing gas pressure is about 0.6-0.9MPa, the melt The temperature is about 760-830°C. After the alloy liquid rises to about 800°C, it is sprayed. The deposited billet after spraying is subjected to hot extrusion pre-deformation. The extrusion ratio is about 16:1, and the extrusion temperature is 350°C. The compact is used as a hot-rolled billet. The deposited slab was heated before rolling at a temperature of 350°C and a holding time of 30 minutes. The reduction of the rolling pass is between 5% and 25%, the rolling temperature is 300-400°C, and the temperature of the roll is heated to about 200°C. After rolling, the structure of the magnesium alloy plate is uniform and fine, the grain size is between 5 and 10 μm, the tensile strength at room temperature is 386MPa, the yield strength ...

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Abstract

The invention belongs to the technical field of non-ferrous metal magnesium alloy preparation and processing, and particularly relates to a preparation method of a high-performance magnesium alloy plate with a double-phase structure. In the method provided by the invention, a virgin alloy blank of a double-phase microstructure magnesium alloy is prepared by a spray deposition or quick-flow powder preparation or powder metallurgy process; the virgin alloy blank of the double-phase microstructure magnesium alloy is subjected to extrusion, forging, rolling and stamping 'pre-deformation' to form a pre-deformed blank with a 'double-phase texture'; and the pre-deformed blank is subjected to hot rolling or cold rolling to obtain the finished product. The magnesium alloy provided by the invention has the characteristics of 'double-phase structure' (consisting of fine alpha-Mg matrix phase and stable fine second-phase particles) and 'double-phase texture', and a magnesium alloy plate with good comprehensive performance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation and processing of non-ferrous metal magnesium alloys, and specifically relates to a method for preparing high-performance magnesium alloy plates with dual-phase structure. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, good electromagnetic shielding effect, good damping and shock absorption performance, and easy recycling. It has broad application prospects in automobiles, military affairs, aerospace and other fields. [0003] Since the crystal structure of the magnesium alloy is a close-packed hexagonal structure, the deformation at low temperature deformation is limited to {0001} base slip and Tensile twins tend to have a strong basal texture during deformation, which leads to poor plasticity and mechanical properties of ordinary cast magnesium alloys. For example, Mg-Al-Zn series deformed magnesium alloys are mostly produced by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/02C22C23/04C22C23/06C22C30/00C22C30/06C22F1/06C22F1/00
Inventor 李振亮张婧任慧平金自力
Owner INNER MONGOLIA UNIV OF SCI & TECH
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