Warm static liquid extrusion method and mould for producing magnesium alloy wire or bar

A technology of hydrostatic extrusion and manufacturing method, applied in metal extrusion dies, metal extrusion control equipment, metal extrusion and other directions, can solve problems such as poor plasticity, high processing cost, cracks, etc.

Inactive Publication Date: 2007-08-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems of poor plasticity, large flow friction resistance, easy cracking and high processing cost during plastic processing of magnesium alloys

Method used

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  • Warm static liquid extrusion method and mould for producing magnesium alloy wire or bar
  • Warm static liquid extrusion method and mould for producing magnesium alloy wire or bar

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Experimental program
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specific Embodiment approach 1

[0009] Specific embodiment one: a kind of magnesium alloy wire or bar material thermostatic extrusion manufacturing method described in this embodiment, it is realized according to the following steps: 1, magnesium alloy billet processing: choose magnesium alloy bar stock, Process the magnesium alloy bar head into a conical surface with a cone angle of 20-60°; 2. Apply lubricant: mix castor oil and graphite in a weight ratio of 3-5:1 and apply it to the processed magnesium alloy blank On the surface; 3. Castor oil heating: preheat the castor oil to 250-300°C; 4. Heating and temperature control of the warm static liquid extrusion die: heat the warm static liquid extrusion die to 250-300°C and control the temperature Between 250 and 300°C; 5. Put the magnesium alloy billet: put the magnesium alloy billet that has completed step 2 into the extrusion die of a warm and static liquid extrusion die with a temperature of 250 to 300°C. The head and the conical surface of the extrusion ...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the magnesium alloy billet is first heated to 250-300°C, and the heating rate is kept at 6-8°C / min. After reaching the heating temperature, the billet must be heated The furnace is kept warm for at least 15-45 minutes, and then the heated magnesium alloy billet is put into the inner cavity of the extrusion die of the hydrostatic extrusion die. Using such process steps can greatly improve production efficiency.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step one, the magnesium alloy bar head is processed into a conical surface with a cone angle α of 38°, and a cone with a cone angle γ of the extrusion die mouth of 40° The surfaces cooperate to form an effective seal.

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Abstract

The invention relates to a hydraulic extruding method for producing magnesium alloy wire or rod, and relative specific extruding mould, which can avoid crack and high cost or the like. The inventive method comprises that processing magnesium alloy blank, coating lubricant, and heating with era oil, heating hydraulic extruding mould and controlling temperature, arranging magnesium alloy blank, filling era oil, arranging movable convex mould, pressurizing and extruding. The inventive mould comprises a movable convex mould (26), under a convex mould (6) and coaxial with the convex mould (6), wherein the lower end of the convex mould (26) is through a convex mould through hole (8) at the middle of a convex mould press plate (17) to be mounted on the upper part of an extruding barrel (13), and the extruding barrel (13) is a multilayer cold press extruding one. The invention can obtain better physical property and surface quality, or the like.

Description

technical field [0001] The invention relates to a method for manufacturing magnesium alloy wire or rod by thermostatic liquid extrusion and a special extrusion die for the method. Background technique [0002] Magnesium alloy is currently the lightest engineering metal material with a density of about 1.78g / cm 3 , 1 / 4 of steel, 2 / 3 of aluminum, and 1 / 4 of zinc. Due to the low density, compared with commonly used engineering materials, the specific strength and specific stiffness of magnesium alloys are much higher. In addition, magnesium alloy also has excellent thermal conductivity, vibration absorption and wear resistance, good electromagnetic shielding performance, and is easy to cast and machine. At the same time, magnesium alloy is also a reusable and environmentally friendly material. Due to these remarkable advantages, magnesium alloys are increasingly widely used in industrial fields such as automobiles, aerospace, and information communications. From the perspec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C29/00B21C31/00B21C23/32B21C23/01B21C25/02B21C29/04C10M103/02C10M101/04C10N40/20
Inventor 王少纯邢忠文刘威李强陈峰伟
Owner HARBIN INST OF TECH
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