AZ61 magnesium alloy with weak-basal/non-basal texture and low anisotropy, and preparation method of AZ61 magnesium alloy

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

Active Publication Date: 2016-04-13
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • 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 metho

Method used

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  • AZ61 magnesium alloy with weak-basal/non-basal texture and low anisotropy, and preparation method of AZ61 magnesium alloy
  • AZ61 magnesium alloy with weak-basal/non-basal texture and low anisotropy, and preparation method of AZ61 magnesium alloy
  • AZ61 magnesium alloy with weak-basal/non-basal texture and low anisotropy, and preparation method of AZ61 magnesium alloy

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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 sample temperature 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, without an...

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Abstract

The invention discloses an AZ61 magnesium alloy with weak-basal/non-basal texture and low anisotropy, and a preparation method of the AZ61 magnesium alloy, and belongs to the technical field of magnesium alloy plastic processing. A molten AZ61 magnesium alloy is subjected to solid-solution treatment at a deformation temperature of 250-350 DEG C. Continuous cyclic hammer forging is performed through an industrial air hammer forging machine along three axial directions orthogonal to one another; one time of hammer forging in one direction is one pass; and the direction is changed every pass of hammer forging. Strain of each pass is 3-10%, and an average strain rate of hammer forging is 15-200 s<-1>. Hammer forging is continuously performed for 20-250 passes. The grain size of a hammer-forged sample is 12-30 [mu]m; the texture peak intensity is less than 6; a deviation angle of a texture peak location relative to a pole figure center is more than 30 degrees. In each direction of the sample, yield strength sigma<y>, tensile strength sigma, and elongation percentage sigma are no less than 90 MPa, 270 MPa, 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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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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