A kind of weak/non-basal texture, low anisotropy az61 magnesium alloy and its preparation method

An anisotropic, magnesium alloy technology, applied in the field of weak/non-basal texture, low anisotropy AZ61 magnesium alloy and its preparation, can solve the problems of low production efficiency, poor comprehensive mechanical properties, high cost, and achieve operation The effect of convenience, high forging strain rate and short production process

Active Publication Date: 2018-02-13
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the shortcomings of current commercial AZ61 magnesium alloy forging such as low production efficiency, high cost, and poor comprehensive mechanical properties, the present invention provides a weak / non-basal texture, low anisotropy AZ61 magnesium alloy and a preparation method thereof. The production process is short, the equipment is simple, the production efficiency is high, and the cost is low. At the same time, the processed magnesium alloy has weak / non-basal texture and good comprehensive mechanical properties, and has broad industrial application prospects.

Method used

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  • A kind of weak/non-basal texture, low anisotropy az61 magnesium alloy and its preparation method
  • A kind of weak/non-basal texture, low anisotropy az61 magnesium alloy and its preparation method
  • A kind of weak/non-basal texture, low anisotropy az61 magnesium alloy and its preparation method

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Effect test

Embodiment 1

[0039] Select AZ61 magnesium alloy semi-continuous casting as-cast material, cut out three 50mm×50mm×50mm cube block blanks in the ingot, and air-cool after solid solution treatment at 420°C for 16h; On the hammer forging machine, the hammer forging process is carried out, that is, the hammer forging is continuously cycled in the three directions of X, Y, and Z. One hammer forging in one direction is one pass, and the direction is changed every time for hammer forging. The amount of strain in each pass is controlled at 5%, and the average strain rate is 20s -1 , three block blanks were continuously hammered for 30 passes (sample 1), 60 passes (sample 2), and 120 passes (sample 3). The time for 120 passes of hammer forging is 3.5 minutes, the temperature of the sample after forging is between 265°C and 300°C, and the final sample is air-cooled. There is no defect on the surface of the sample after hammer forging, and the size difference of each sample in three directions is no...

Embodiment 2

[0043] Select AZ61 magnesium alloy semi-continuous casting as-cast material, cut out 55mm×55mm×55mm cube block billet in the ingot, and air cool after solid solution treatment at 420°C for 16h; hold at 320°C for 60min, and then hammer forge in industrial air Hammer forging is carried out on the machine, that is, hammer forging is continuously cycled in three directions of X, Y, and Z. One hammer forging in one direction is one time, and the direction is changed every time for hammer forging. The amount of strain in each pass is controlled at 5%, and the average strain rate is 30s -1 , continuous hammer forging 200 times, the time used is 4.5min, the temperature of the sample after forging is 345 ℃, and the final sample is air-cooled. There is no defect on the surface of the sample after hammer forging, and the size of the sample is basically unchanged, see figure 2 (d); fine and uniform equiaxed grains are formed after hammer forging, with an average grain size of 16 μm, wit...

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Abstract

The invention discloses an AZ61 magnesium alloy with weak / non-basal plane texture and low anisotropy and a preparation method thereof, belonging to the technical field of plastic processing of magnesium alloys. The as-cast AZ61 magnesium alloy is subjected to solution treatment, and at a deformation temperature of 250-350°C, it is hammered continuously in three axial directions orthogonal to each other by using an industrial air hammer forging machine. Each time, the direction of each hammer forging is changed, the strain in each pass is 3-10%, the average strain rate of hammer forging is 15-200s‑1, and the hammer forging is continuous for 20-250 passes. After hammer forging, the grain size of the sample is 12-30 μm, the peak texture strength is less than 6, and the deviation angle of the peak texture position relative to the pole figure center is greater than 30°; in all directions of the sample, the yield strength σy, tensile strength σb, and elongation δ are all Not less than 90MPa, 270MPa and 20% respectively.

Description

technical field [0001] The invention belongs to the technical field of plastic processing of magnesium alloys, and in particular relates to an AZ61 magnesium alloy with weak / non-basal texture and low anisotropy and a preparation method thereof. Background technique [0002] Compared with other metals, magnesium alloy has the advantages of low density, high specific strength, good shock absorption performance, good thermal conductivity, and good processing performance. It has broad application prospects in the fields of automobiles, electronics, communications, aerospace, and national defense. However, magnesium alloys have a close-packed hexagonal structure, and there are few independent slip systems. At room temperature, the basal plane (0001)<11-20> slips mainly, and other more slip systems can only be activated at high temperatures. Therefore, the comprehensive mechanical properties of magnesium alloys at room temperature are unsatisfactory, which seriously limits t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22C23/02
Inventor 陈荣石姜明光闫宏柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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