Method for obtaining double-peak-structure AZ80A magnesium alloy forging stock through multidirectional forging
A multi-directional forging, magnesium alloy technology, applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problems of low average elongation, poor plasticity, etc., to achieve increased strength and plasticity, low cost, The effect of uniform mechanical properties
Active Publication Date: 2021-08-10
HARBIN INST OF TECH
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Problems solved by technology
The traditional view is that metal structural materials should obtain a uniform fine-grained structure, but research has found that although ultra-fine-grained or fine-grained materials produced by different processes have high strength, their average elongation is usually very low and their plasticity is poor
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[0028] combine Figure 1-Figure 4 Illustrate, a kind of method for multidirectional forging obtains bimodal structure AZ80A magnesium alloy forging billet, comprises the following steps:
[0029] 1. Prepare AZ80A magnesium alloy billet
[0030] Prepare a certain size of AZ80A magnesium alloy cuboid billet;
[0031] 2. High temperature gradient temperature multi-directional forging billet
[0032] The initial temperature is 380°C, and the obtained cuboid billet is continuously forged at 380°C-270°C for 12 passes. For every 8-9°C drop in the billet temperature, 1 pass is forged, the deformation rate is 2mm / s, and the deformation amount of each pass is 50. %, respectively forging the three adjacent faces of the block blank, and changing the direction for the next forging after the completion of one forging;
[0033] 3. Medium and low temperature isothermal multi-directional forging billets
[0034] The billets after high-temperature gradient temperature multi-directional forg...
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The invention discloses a method for obtaining a double-peak-structure AZ80A magnesium alloy forging stock through multidirectional forging. The method comprises the following steps that 1, an AZ80A magnesium alloy blank is prepared, and specifically, the AZ80A magnesium alloy cuboid blank with a certain size is prepared; 2, high-temperature gradient temperature multidirectional forging of the blank is performed, specifically, the initial temperature is 380 DEG C, the obtained cuboid blank is continuously forged for 12 passes at the temperature of 380 DEG C-270 DEG C, three adjacent surfaces of the blocky blank are forged respectively, after one-time forging is completed, the direction is changed, and next-pass forging is carried out; 3, medium and low temperature isothermal multidirectional forging of the blank is performed, specifically, isothermal multidirectional forging is performed on the blank subjected to high-temperature gradient temperature multidirectional forging at 150-180 DEG C, and continuous isothermal forging is performed on the three adjacent side surfaces of the blank; 4, low-temperature aging treatment is performed on the blank, specifically, aging treatment is performed on the blank subjected to medium-low-temperature isothermal multidirectional forging at 75-100 DEG C for 3 h to finally obtain the double-peak structure AZ80A magnesium alloy forging stock with coarse grains and fine grains. The method is used for reinforcing and plastifying the AZ80A magnesium alloy forging stock.
Description
technical field [0001] The invention relates to a method for obtaining a bimodal structure by multidirectional forging of a magnesium alloy, in particular to a method for obtaining a bimodal structure of an AZ80A magnesium alloy forging billet by multidirectional forging. Background technique [0002] Magnesium alloy is considered to be the lightest structural material due to its low density (about 2 / 3 of aluminum, 1 / 4 of steel, and 1 / 3 of titanium). The reason is that its strength and room temperature plasticity are low. The poor room temperature strength and plasticity of magnesium alloys has become a bottleneck that seriously restricts the development of magnesium alloy bearing components in my country's aerospace industry. The strengthening of metal structural materials is usually accompanied by a decrease in plasticity, and this negative correlation between strength and plasticity also exists in magnesium alloys. The room temperature elongation of load-bearing compone...
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Login to View More IPC IPC(8): B21J5/00B21K29/00C22F1/06
CPCB21J5/002B21K29/00C22F1/06
Inventor 袁林张子健宗影影单德彬郭斌
Owner HARBIN INST OF TECH