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Reciprocating extrusion device and processing method for preparing ultrafine grain magnesium alloy

A technology of ultra-fine grain and reciprocating extrusion, which is applied in the field of machinery, can solve the problems of grain growth, affect the effect of grain refinement, and affect production efficiency, and achieve the effects of high production efficiency, increased strength, and convenient heating

Inactive Publication Date: 2016-02-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this technology replaces the pipe extrusion die, it needs to open the die, take out the sample, replace the die, re-insert the sample, reheat the die and other cumbersome steps. On the one hand, it affects the production efficiency. Reheating is prone to grain growth, which affects the effect of grain refinement

Method used

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  • Reciprocating extrusion device and processing method for preparing ultrafine grain magnesium alloy
  • Reciprocating extrusion device and processing method for preparing ultrafine grain magnesium alloy
  • Reciprocating extrusion device and processing method for preparing ultrafine grain magnesium alloy

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Embodiment 1

[0053] The magnesium alloy bar with a length of 40 mm is processed into a circular tube blank 9 with a diameter 0.1 mm smaller than the inner diameter of the extrusion barrel die 5 and 0.1 mm larger than the diameter of the fixed extrusion rod 3 , and the surface oil is cleaned. Put the magnesium alloy tube blank 9 into a heating furnace at 350° C. and keep it warm for 1 hour. Turn on the heating jacket 4, heat the extrusion die, and keep it warm for 30 minutes when it reaches 350°C. Place the magnesium alloy pipe blank 9 in the left cavity 7 of the extrusion cylinder mold 5, and extend the extrusion ring 2, the fixed extrusion rod 3 and the extrusion rod 1 into the left and right cavity 7 of the extrusion cylinder mold 5 , 8, and contact the magnesium alloy tube blank 9. Open the hydraulic extrusion machine, the extrusion pressure of the extrusion ring 2 is 900MPa, the extrusion pressure of the extrusion rod 1 is 200MPa, and the extrusion ring 2 pushes the magnesium alloy pi...

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Abstract

A method for preparing ultra-fine-grained magnesium alloys belongs to the technical field of plastic processing of non-ferrous metals. The ultra-fine-grained magnesium alloys include ultra-fine-grained magnesium alloy tubes and ultra-fine-grained magnesium alloy blocks. The reciprocating extrusion device for grain magnesium alloy is characterized in that the steps of preparing ultra-fine grain magnesium alloy tube include: fixing the reciprocating extrusion die - preheating the magnesium alloy billet - heating the equipment - placing the magnesium alloy billet - Reciprocating extrusion deformation --- static --- produced by ultra-fine grain magnesium alloy. The invention can realize the preparation of superfine-grain magnesium alloy tubes or superfine-grain magnesium alloy blocks, and has higher production efficiency and wider application range.

Description

technical field [0001] The invention belongs to the field of machinery and is mainly used for plastic processing of non-ferrous metals, and in particular relates to a reciprocating extrusion device and a processing method for preparing superfine-grained magnesium alloys. Background technique [0002] Magnesium alloy is currently the lightest metal structural material, with advantages of high specific strength and specific stiffness, good shock absorption, good electromagnetic shielding, easy cutting and easy recycling, and is known as "21st century green engineering material". It has been applied to a certain extent in the fields of aerospace, automobile, electronics, sports equipment and instrumentation. However, the structural characteristics of magnesium alloys determine that they have disadvantages such as low strength, low hardness, poor plasticity and poor corrosion resistance, making their application fields far less extensive than traditional steel and aluminum alloy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/00B21C23/08B21C23/21
Inventor 张华樊建锋程伟丽许并社董洪标
Owner TAIYUAN UNIV OF TECH
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