Preparation method of layered double-scale magnesium alloy

A magnesium alloy, layered double technology, applied in the field of layered double-scale magnesium alloy preparation, can solve the problem of high temperature control, difficult to accurately control the double-scale heredity of the internal structure of the alloy, grain growth, etc. , to avoid rolling cracking, microstructure, release stress concentration effect

Active Publication Date: 2020-01-14
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The powder metallurgy method is to mechanically mix two kinds of powder particles with different grain sizes, and then solid-state sintering to obtain magnesium alloy bulk materials. This method requires high temperature control during

Method used

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  • Preparation method of layered double-scale magnesium alloy
  • Preparation method of layered double-scale magnesium alloy
  • Preparation method of layered double-scale magnesium alloy

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Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a method for preparing a layered double-scale magnesium alloy, which includes the following steps:

[0037] (1) First, carry out the homogenization heat treatment experiment of the magnesium alloy ingot in the resistance heating furnace. After the resistance furnace is heated to 420°C, place the ingot in the furnace to heat and keep it warm for 12 hours. After the homogenization heat treatment is completed, the resistance furnace is cut off. Power supply, the ingot is cooled to room temperature with the furnace; the ingot after homogenization annealing is wire cut, and several samples to be rolled are obtained with a specification of 60mm (length) × 40mm (width) × 10mm (height).

[0038](2) After the resistance heating furnace is heated to 370°C, place the sample of the magnesium alloy plate to be rolled in the furnace and keep it warm for 20 minutes. During the billet heat preservation process, the roll spacing should be adjusted to a suitable ...

Embodiment 2

[0044] This embodiment provides a method for preparing a layered double-scale magnesium alloy, which includes the following steps:

[0045] (1) First, conduct the homogenization heat treatment experiment of the magnesium alloy ingot in the resistance heating furnace. After the resistance furnace is heated to 400°C, place the ingot in the furnace to heat and keep it warm for 16 hours; after the homogenization heat treatment, cut off the resistance furnace. Power supply, the ingot is cooled to room temperature with the furnace; the ingot after homogenization annealing is wire-cut to obtain several samples to be rolled with specifications of 60mm (length) × 40mm (width) × 10mm (height);

[0046] (2) After the resistance heating furnace is heated to 280°C, place the sample of the magnesium alloy plate to be rolled in the furnace and keep it warm for 30 minutes. During the billet heat preservation process, the roll spacing should be adjusted to a suitable position by turning the ro...

Embodiment 3

[0052] This embodiment provides a method for preparing a layered double-scale magnesium alloy, which includes the following steps:

[0053] (1) First, carry out the homogenization heat treatment experiment of the magnesium alloy ingot in the resistance heating furnace. After the resistance furnace is heated to 440°C, place the ingot in the furnace to heat and keep it warm for 12 hours; after the homogenization heat treatment, cut off the resistance furnace. Power supply, the ingot is cooled to room temperature with the furnace; the ingot after homogenization annealing is wire cut, and several samples to be rolled are obtained with a specification of 60mm (length) × 40mm (width) × 10mm (height).

[0054] (2) After the resistance heating furnace is heated to 340°C, place the sample of the magnesium alloy plate to be rolled in the furnace and keep it warm for 25 minutes. During the billet heat preservation process, the roll spacing should be adjusted to a suitable position by tur...

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Abstract

The invention provides a preparation method of a layered double-scale magnesium alloy, and belongs to the field of light metal material processing. The method comprises the following steps that isothermal heating is carried out on a magnesium alloy plate blank subjected to heating homogenization at 280-370 DEG C for 20-30 min, then the first pass of rolling deformation is immediately carried out to obtain a deformed plate, wherein the strain rate of rolling is 3.5-4.9s<-1>; and after annealing is carried out on the deformed plate, the second pass of rolling deformation is carried out at 280-340 DEG C, wherein the strain rate of rolling is 6.0-7.1s<-1>. According to the preparation method of the layered double-scale magnesium alloy, the high strain rate and gradient cooling double-pass rolling are adopted so that the high-strength toughened magnesium alloy material with the layered double-scale organizational structure can be obtained, the alternate layered distribution of the ultra-fine crystal layer and the micron crystal layer is achieved, and the strength and the plastic toughness of the magnesium alloy are improved.

Description

technical field [0001] The invention belongs to the field of light metal material processing, in particular to a method for preparing a layered double-scale magnesium alloy. Background technique [0002] With energy saving and environmental protection becoming the theme of the present era, magnesium and its alloys have been widely used in aerospace, rail transit, electronic products and other fields due to their advantages such as high specific strength, low density, good damping and shielding properties. The quantitative requirements and the shortage of energy resources have greatly promoted the development of magnesium alloys. With the increasingly complex service environment of engineering components, the performance requirements of magnesium alloys are getting higher and higher. However, as the lightest metal structure material used in engineering, magnesium alloy has a typical close-packed hexagonal crystal structure, and has low stacking fault energy and few independe...

Claims

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Application Information

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IPC IPC(8): C22F1/06C22C23/02
CPCC22C23/02C22F1/06
Inventor 徐岩李玮虎鹏鸿阎泽文刘孝轲贾建波杨志刚彭伟劲
Owner YANSHAN UNIV
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