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Reciprocating extrusion device and processing method for reinforced magnesium alloy tube

A technology for strengthening magnesium alloys and processing methods, applied in metal extrusion dies and other directions, can solve the problems of inability to meet the market demand of magnesium alloy pipes and application restrictions, and achieve the effects of simple structure, low production cost and strong operability

Inactive Publication Date: 2015-12-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used SPD technologies include reciprocating extrusion, equal channel angular extrusion, high-pressure torsion, vibration and impact, etc., but these methods can only prepare ultra-fine-grained magnesium alloy bulk materials, which cannot meet the increasingly strong market demand for magnesium alloy pipes , so that its application is greatly limited

Method used

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  • Reciprocating extrusion device and processing method for reinforced magnesium alloy tube
  • Reciprocating extrusion device and processing method for reinforced magnesium alloy tube
  • Reciprocating extrusion device and processing method for reinforced magnesium alloy tube

Examples

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Effect test

Embodiment

[0037] Material preparation: Carry the magnesium alloy ingot to remove the surface layer, process it into a round tube billet with an inner diameter 0.1mm larger than the diameter of the fixed extrusion rod, and an outer diameter 0.1mm smaller than the inner diameter of the extrusion barrel mold, and remove the surface oil, and then put it into 350 ℃ for heating In the furnace, keep warm for 1 hour;

[0038] First install the reciprocating extrusion device on the hydraulic extrusion machine, install it firmly, connect it correctly, and turn on the heating jacket 4 to heat the extrusion die, and keep it warm for 30 minutes when it reaches 350°C.

[0039] Then start the hydraulic extrusion machine, withdraw from the upper extrusion ring 1 and the upper fixed extrusion rod 3, place the preheated magnesium alloy pipe blank 10 in the upper die cavity 8 of the extrusion barrel mold 6, and then press the upper extrusion The ring 1 and the upper fixed extrusion rod 3 extend into the u...

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Abstract

The invention relates to a reciprocating extruding device and a machining method of a reinforced magnesium alloy tube, belongs to the field of plastic machining of nonferrous metals. The reciprocating extruding device comprises an upper extruding ring, a lower extruding ring, an upper fixed extruding rod, a lower fixed extruding rod, an extruding cylinder mold and a necking region, wherein the extruding cylinder mold is divided into an upper mold cavity and a lower mold cavity by the necking region, and a heating sleeve is arranged on the outer wall of the extruding cylinder mold; the upper extruding ring and the lower extruding ring are respectively arranged at the peripheries of the upper fixed extruding rod and the lower fixed extruding rod and are respectively arranged in the upper mold cavity and the lower mold cavity, the upper extruding ring and the upper fixed extruding rod are connected with an upper hydraulic stretching cavity, and the lower extruding ring and the lower fixed extruding rod are connected with a lower hydraulic stretching cavity. The reciprocating extruding device has the beneficial effects that the tensile strength of the magnesium alloy tube machined by virtue of the reciprocating extruding device can reach 500MPa, and an extruding mold is simple in structure and strong in operability of extrusion deformation and can realize continuous extrusion deformation, so that the production cost is relatively low, and the production efficiency is high.

Description

technical field [0001] The invention relates to a reciprocating extrusion device and a processing method for reinforcing magnesium alloy tubes, belonging to the technical field of plastic processing of nonferrous metals and increasing mechanical properties. Background technique [0002] With the development of aerospace, transportation and information industries, magnesium alloys are becoming the third largest metal structural materials after traditional steel and aluminum alloy materials, and are called "green engineering materials in the 21st century". However, magnesium alloys have low strength, low hardness, poor plasticity and poor corrosion resistance, so that their industrial applications are greatly restricted. Magnesium alloys must be strengthened to expand their scope of use and application fields. [0003] Severe plastic deformation technology (SPD for short) can refine the grains of magnesium alloys to submicron or even nanometer level, and is currently a commonl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/08B21C25/02
Inventor 张华程伟丽樊建锋许并社董洪标
Owner TAIYUAN UNIV OF TECH
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