Radial forging process of cast-state magnesium alloy tube

A radial forging, magnesium alloy technology, applied in metal processing equipment and other directions, can solve the limitations of the promotion and application of large-scale high-strength deformed magnesium alloys, the poor comprehensive performance of hot-rolled sheets and continuous casting and rolling sheets, and the limitations on the application of magnesium alloys. and other problems, to achieve the effect of shortening the accuracy of forgings, improving comprehensive mechanical properties, and saving raw materials

Inactive Publication Date: 2012-08-15
江苏诚德钢管股份有限公司
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AI Technical Summary

Problems solved by technology

However, due to the close-packed hexagonal structure of magnesium alloys, the plasticity at room temperature is low and the forming ability is poor, which greatly limits the application of magnesium alloys.
At present, the production of deformed magnesium alloy plates mainly focuses on hot rolling, hot extrusion, continuous casting and rolling. The comprehensive performance of hot rolled plates and continuous casting and rolling plates is poor, and the size Small size and large anisotropy greatly limit the popularization and application of large-scale high-strength wrought magnesium alloys

Method used

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  • Radial forging process of cast-state magnesium alloy tube

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Embodiment Construction

[0015] The production of magnesium alloy pipe with ultra-fine grain structure with product specification of ф120mm×40mm is taken as an example to illustrate.

[0016] Its specific production method is as follows:

[0017] 1. Homogenization annealing: Clean the surface of the extruded magnesium alloy tube (specification: ф70mm×15mm) to confirm that there are no cracks.

[0018] The tube billet is heated up with the furnace or put into the furnace when the furnace temperature is lower than 200°C. The heating rate is controlled at <10°C / min. ~15h, when the temperature of the tube blank is between 400~470°C, it is kept for 4~20h, and the tube blank is air-cooled to room temperature after it comes out of the furnace.

[0019] 2. Forging processing:

[0020] 1) Forging heating temperature: The as-cast magnesium alloy hollow billet needs to be heated thoroughly when it is forged. The surface temperature of the first hot forging is in the range of 350-420°C; When the amount is grea...

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Abstract

The invention relates to a radial forging process of a cast-state magnesium alloy tube, belonging to non-ferrous metal processing. The process comprises the following steps of firstly carrying out homogenizing annealing, forging, finishing and finally carrying out surface machining. By using the process, two problems for limiting the development of seamless magnesium alloy tubes, namely difficult hot piercing and low yield, are fundamentally solved, so that the yield of the magnesium alloy tube is raised from 45-55% currently at home and abroad to above 90%, the production cost of tubes is reduced by above 40% and leapfrog development is realized in the production of the magnesium alloy seamless tubes. The processed product has the advantages of excellent mechanical property, high production efficiency, high material utilization ratio, high precision of forging member and low surface roughness.

Description

technical field [0001] The invention relates to non-ferrous metal processing, that is, a radial forging process for cast magnesium alloy pipes. Background technique [0002] Magnesium alloys have good electrical and thermal conductivity, good electromagnetic shielding, high specific strength and specific stiffness, good shock absorption, good cutting and dimensional stability, easy recycling, and environmental protection. , electronic communication and other industries have great application prospects, known as "green engineering materials in the 21st century". However, due to the close-packed hexagonal structure of magnesium alloys, the plasticity at room temperature is low and the forming ability is poor, which greatly limits the application of magnesium alloys. At present, the production of deformed magnesium alloy plates mainly focuses on hot rolling, hot extrusion, continuous casting and rolling. The comprehensive performance of hot rolled plates and continuous casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C22F1/06
Inventor 张铮谭明陈忠徐国荣权高峰于超王鹏展王林林
Owner 江苏诚德钢管股份有限公司
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