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Dual-controlled composite forming method for casting and forging of magnesium alloy

A composite forming and magnesium alloy technology, applied in the field of dual-control composite forming of magnesium alloy casting and forging, can solve the problems of difficulty in obtaining fine non-dendritic solid phase, inability to refine grains, difficult product performance, etc., and achieve product quality High, good material formability, high dimensional accuracy effect

Inactive Publication Date: 2011-08-03
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing semi-solid slurry preparation methods, such as mechanical stirring, electromagnetic stirring, deformation induction method, etc. non-dendritic solid phase, and cannot continue to refine grains through semi-solid forming, so it is difficult to further improve product performance

Method used

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  • Dual-controlled composite forming method for casting and forging of magnesium alloy
  • Dual-controlled composite forming method for casting and forging of magnesium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The ZK60 magnesium alloy is smelted in a resistance heating furnace. After degassing and slag removal, the temperature is lowered to 580 ° C. The whole melting process is carried out under N 2 +6% SF 6 Carry out under a protective atmosphere; then, carry out electromagnetic stirring on the melt, uniform temperature distribution of the melt, and break dendrites; cool and solidify in the forming mold to obtain a casting as a forging forming blank; heat the casting to the solid phase of ZK60 magnesium alloy 5-10°C above the linear temperature (ZK60 solidus temperature is 426°C) and keep warm for 5 minutes, place it in a forging forming mold; forge and form at a deformation rate of 1s-1.

Embodiment 2

[0022] The AZ31 magnesium alloy is smelted in a resistance melting furnace. After degassing and slag removal, the temperature is lowered to 580°C. The whole smelting process is covered with N 2 +6% SF 6 Carried out under a protective atmosphere; then, the melt is mechanically stirred to uniform the temperature distribution of the melt, and the dendrites are broken; cooling and solidifying in the forming mold to obtain a casting, which is used as a forging blank; heating the casting to the solid phase of AZ31 magnesium alloy 2-5°C above the linear temperature (the solidus temperature of AZ31 magnesium alloy is 566°C) and keep warm for 5 minutes, then place it in the forging mold; take 10s -1 Deformation rate forging forming.

[0023] In the present invention, by changing the type of magnesium alloy, the casting and forging dual-control composite forming method can be used to prepare magnesium alloy products with relatively complex shapes and excellent performance.

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Abstract

The invention relates to a dual-controlled composite forming method for the casting and forging of magnesium alloy, which is suitable for improving the plastic deformation capacity of the magnesium alloy, and can meet the requirement of producing a high-performance magnesium alloy product of a relatively complex shape. The method comprises the following steps of: preparing magnesium alloy pulp with a non-dendritic microstructure through a semi-solid mixing and casting method; casting the magnesium alloy pulp in a forming mould through a semi-solid rheocasting method, wherein a cast obtained after the cooling and solidification serves as a semi-formed part; heating the cast to 2-10 DEG C above the solidus temperature in a forging and forming mould; and die forging and forming the cast to obtain a magnesium alloy part. The method can be used for producing magnesium alloy parts of complex shapes, and produced parts have the advantages of excellent mechanical properties, high dimensional accuracy and strong deformation capacity.

Description

technical field [0001] The invention relates to a magnesium alloy casting and forging dual-control compound forming method. The invention can be used to prepare magnesium alloy parts with complex shapes and high performance requirements. The method has good formability, and the prepared product has the advantages of good performance and high dimensional accuracy. Background technique [0002] Magnesium alloy has excellent properties such as light weight, easy recycling, good thermal and electrical conductivity, damping and vibration reduction, electromagnetic shielding, etc., and has broad application prospects in the fields of transportation, communication, electrical appliances, and aerospace. However, magnesium alloy has the characteristics of hexagonal crystal structure, which has few independent slip systems under room temperature deformation conditions, low room temperature plasticity, and difficult deformation processing. Although the processing temperature is increa...

Claims

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Application Information

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IPC IPC(8): B21J1/00
Inventor 王开薛寒松李波程建锋黄笑宇邹茂华刘昌明
Owner CHONGQING UNIV
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