Forging method for multi-direction, circulatory and high-speed hammer forging of magnesium alloy

A magnesium alloy, multi-directional technology, applied in high-speed hammer forging magnesium alloy forging, multi-directional, magnesium alloy processing, circulation field, can solve the problem that it is not suitable for the production of bulk magnesium alloy final products, high equipment stability requirements, It is not suitable for production and other problems, and achieves the effect of facilitating large-scale industrial production and application, inhibiting dynamic recrystallization, and inhibiting grain growth

Active Publication Date: 2014-05-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, this punching method also has some disadvantages: due to the high speed and large amount of deformation, the energy required for punching and forging is very large, which requires a large load that can be applied by the equipment and high requirements for the stability of the equipment; moreover, each punching forging Finally, the material is water-quenched, and then returned to the furnace for reheating. After reaching the temperature and holding for a certain period of time, it is punched and forged again. The production energy consumption is high and the production efficiency is low; there is only one direction of strain, so it is not suitable for the production of large-volume block materials.
This method is a forging blanking method that performs small deformation compression at low temperature and improves the subsequent rolling performance. Due to the low temperature (room temperature ~ 200°C) and small deformation, only twinning can occur and no recrystallization, so it is only a method. This blanking method is not suitable for the final product of bulk magnesium alloy

Method used

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  • Forging method for multi-direction, circulatory and high-speed hammer forging of magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1) Select AZ80 as-cast material, cut into 80mm×80mm×100mm squares, homogenize at 400°C for 2 hours, then carry out continuous hammer forging on a 250Kg industrial air hammer forging machine. First, hammer forging 3 times continuously along the height direction of the sample (Z direction), the hammering frequency is 20 times / min, the hammering speed is 1m / s, and the strain rate is 10s -1 , each time the strain is 5%, and the total strain in the height direction reaches 15%; the sample is rotated at 90°C, continuously forged 4 times along the width direction (Y direction) of the sample, and the hammering frequency is 50 times / min. The impact speed is 10m / s, and the strain rate is 10s -1, each time the strain is 6%, and the total strain in this direction reaches 24%; the sample is then rotated at 90°C, and continuously forged 2 times along the length direction of the sample (X direction), the hammering frequency is 60 times / min, The hammering speed is 10m / s, and the strai...

Embodiment 2

[0033] Select Mg-2.0Zn-0.8Gd-0.4Zr as-cast material, cut into 50mm×50mm×60mm squares, homogenize at 500°C for 24 hours, and then carry out continuous hammer forging on a 250Kg industrial hammer forging machine. First, hammer forging 4 times continuously along the height direction of the sample (Z direction), the hammering frequency is 30 times / min, the hammering speed is 15m / s, and the strain rate is 50s -1 The strain amount is 6% each time, and the total strain amount in the height direction reaches 24%; the sample is rotated at 90°C, forged 2 times along the length direction (X) of the sample, and the hammering frequency is 70 times / min (Supplementary), The hammering speed is 70m / s (supplementary) and the strain rate is 100s -1 , the strain amount is 20%, and the total strain amount in this direction is 20%; the sample is then rotated 90°C, continuously forged 5 times along the width direction (Y) of the sample, the hammering frequency is 200 times / min, and the hammering spe...

Embodiment 3

[0035] AZ31 rolled material was selected, cut into 50mm×55mm×60mm squares, after homogenization treatment at 420°C for 0.5 hours, continuous hammer forging was carried out on a 250Kg industrial hammer forging machine. First, hammer forging 5 times continuously along the length direction of the sample (X direction), the hammering frequency is 70 times / min, the hammering speed is 40m / s, and the strain rate is 40s -1 , each strain is 4%, and the total strain in the height direction reaches 20%; the sample is rotated at 90°C, continuously forged 10 times along the height direction (Z) of the sample, and the hammering frequency is 100 times / min. The speed is 60m / s and the strain rate is 100s -1 , each strain is 2%, and the total strain in this direction reaches 20%; the sample is then rotated at 90°C, and continuously forged 8 times along the width direction (Y) of the sample, with a hammering frequency of 300 times / min. The impact speed is 100m / s, and the strain rate is 45s -1 ,...

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Abstract

The invention relates to a magnesium alloy plastic processing technology, and relates to a forging method for multi-direction, circulatory and high-speed hammer forging of a magnesium alloy. The method comprises the specific steps: after carrying out homogenization annealing of a casting-state or deformation-state magnesium alloy, carrying out continuous high-speed hammer forging along one direction of the bulk material at a certain temperature; after a certain deformation amount is reached, overturning the material, and continuing to carry out continuous high-speed hammer forging along another direction to reach a certain deformation amount; then overturning the material to another direction, and carrying out such circulatory hammer forging until the material reaches a predetermined deformation amount and size; and finally, carrying out heat treatment on the material. The method utilizes the textured micostructure formed during the processes of high-speed hammer forging of the magnesium alloy to be combined to change the hammer forging direction, thereby improving the ultimate deformation amount that the magnesium alloy can withstand and is not cracked during forging, and improving the plastic processing performance of the magnesium alloy. The method is suitable for magnesium and the alloy material thereof, and improves the forging processing production efficiency of magnesium and the alloy material thereof.

Description

technical field [0001] The invention relates to a magnesium alloy processing technology, in particular to a multi-directional, circular, high-speed hammer forging magnesium alloy forging method, which belongs to the technical field of metal material processing. Background technique [0002] As the lightest metal structural material, magnesium alloy has the advantages of small specific gravity, high specific strength, high damping, high thermal conductivity, good shock absorption, and easy recycling. It has broad applications in the fields of automobiles, rail transit, military industry, and aerospace. Application prospect. However, due to the poor plastic processing performance of magnesium alloys, its forging efficiency is low and the yield rate is low, resulting in high cost of forged magnesium alloy products, which limits the large-scale application of forged magnesium alloys. [0003] Since the magnesium alloy has a close-packed hexagonal structure and few independent s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06
Inventor 陈荣石闫宏唐伟能韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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