Rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die

A seamless pipe and hot extrusion technology, applied in metal extrusion dies, metal extrusion, manufacturing tools, etc., can solve the problems of poor pipe accuracy and poor pipe quality, and achieve good processing quality, high quality rate, and extrusion. The effect of low compressive force

Pending Publication Date: 2018-05-11
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, the present invention provides a rare earth reinforced magnesium-zinc alloy seamless pipe hot extrusion process and a temperature-cont

Method used

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  • Rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die
  • Rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die
  • Rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die

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Experimental program
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Example Embodiment

[0052] Embodiment: This embodiment is a Mg-2.0Zn-0.6Y-0.4Nd magnesium alloy seamless pipe with an outer diameter of 7 mm and an inner diameter of 4 mm by hot extrusion.

[0053] Reference to the temperature-controlled extrusion die used in this embodiment figure 1 . The inner squeeze cylinder 10 and the outer squeeze cylinder 5 are limited and fixed by taper fit. The outer squeeze cylinder 5 has a spirally arranged heating wire 11, and the lower side of the inner and outer squeeze cylinder 10 is provided with a temperature measuring hole. The thermocouple 9 and the heating wire 11 in the temperature measuring hole constitute an automatic temperature control system through an external temperature control device; the inner diameter of the inner extrusion cylinder 10 is 30mm, and the pipe outer mold 8 directly contacts the inner wall of the inner extrusion cylinder 10 through transitional fit. The diameter of the pressing needle 7 is 4mm, the extrusion needle 7, the pipe outer mold ...

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Abstract

The invention discloses a rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die. The rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology comprises the technological steps of casting ingot homogenizing treatment, primary extrusion machining, lubricating treatment, temperature control extrusion forming and pipe heat treatment. The rare earth enhanced magnesium-zinc alloy seamless pipe temperature control extrusion die comprises an upper die base, a lower die base, an inner extrusion barrel, an outer extrusion barrel, a heat insulation layer and an outer covering die. A heating wire is arranged inside the outer extrusion barrel, a pipe shaping die and an extrusion rod are installed in the inner extrusion barrel, an extrusion needle is fixedly installed at the lower end of the extrusion rod, the inner extrusion barrel, the outer extrusion barrel, the heat insulation layer and the outer covering dieare provided with a through temperature measuring hole, and a thermocouple is installed in the temperature measuring hole. Compared with the prior art, the rare earth enhanced magnesium-zinc alloy seamless pipe hot extrusion technology and temperature control extrusion die have the advantages that extrusion deformation force is small, assembling and disassembling are more convenient and faster, the pipe blank dimension is more precise, product machining quality is good, and the good rate is high.

Description

technical field [0001] The invention relates to the technical field of zinc alloy seamless pipe processing, in particular to a rare earth reinforced magnesium-zinc alloy seamless pipe hot extrusion process and a temperature-controlled extrusion die. Background technique [0002] Magnesium alloy has the advantages of low density, high thermal conductivity, good damping effect, and easy cutting. It is regarded as the engineering material with the most development and application prospects in this century. It has been applied in many fields such as aviation, aerospace, automobiles, and medical equipment. However, the close-packed hexagonal crystal structure of magnesium and magnesium alloys makes the slip system less active during the deformation process, which affects its plastic deformation ability. Therefore, magnesium alloy, as a component material, is either molded at one time through die-casting; or its plasticity and strength are improved through forging, extrusion, roll...

Claims

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Application Information

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IPC IPC(8): B21C23/00B21C23/08B21C23/32B21C29/00B21C25/02B21C29/04B21C26/00
CPCB21C23/002B21C23/085B21C23/32B21C25/02B21C26/00B21C29/003B21C29/04
Inventor 盛立远都贝宁郑玉峰奚廷斐
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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