Preparation method of magnesium alloy microtubule and special-purpose die

A magnesium alloy and composite mold technology, applied in the direction of metal extrusion molds, etc., can solve the problems of low forming rate, difficult forming, and failure to achieve absolute isothermal, etc., achieve high forming rate, improve mechanical properties, improve mechanical properties and corrosion resistance performance effect

Active Publication Date: 2016-09-07
常州市申鑫新材料科技有限公司
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AI Technical Summary

Benefits of technology

This patented technology improves the quality and performance of magnetic materials by creating fine-grained tubular structures that enhance their strengths while maintaining good electrical conductivity or reducing its susceptibility to damage caused during manufacturing processes such as welding operations. These improvements make it possible to produce more efficient and effective magnet material products at lower cost than current methods.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the properties of metals such as magnetically hardened iron or nickel that have high tensile stress but cannot easily form into complex shapes due to their small size. These types of material require stronger and more rigid methods like casting with molten steel, which makes it challenging to create them accurately without causing damage during processing steps. Additionally, these techniques involve multiple processes making manufacturing process longer than necessary.

Method used

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  • Preparation method of magnesium alloy microtubule and special-purpose die
  • Preparation method of magnesium alloy microtubule and special-purpose die
  • Preparation method of magnesium alloy microtubule and special-purpose die

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preparation example Construction

[0021] The present invention is a kind of preparation method of magnesium alloy micropipe and special mold, and the steps of its method are:

[0022] (1) Preparation of as-cast magnesium alloy blank:

[0023] In the magnesium alloy, the content of Y is 3.6-4.2% by mass percentage; the content of Nd is 2.1-2.5%; the content of La (Ce) is 0.2-0.8% (65%La+35Ce); the content of Zr The content is 0.2-0.8%, and the rest is Mg;

[0024] Melting and casting in a vacuum induction furnace with high-purity argon, the pouring temperature is 780-800 °C;

[0025] The as-cast alloy is subjected to solid solution and homogenization annealing treatment, the solution treatment temperature is 470-510°C, the holding time is 6-10h, and cooled in the air; the homogenization annealing temperature is 460-500°C, and the holding time is 10 ~16h, cooling with the furnace;

[0026] (2) Preparation of ultra-fine grain blank:

[0027] The ultra-fine-grained magnesium alloy microtube billet is prepared ...

Embodiment 1

[0040] Embodiment 1: the preparation method of magnesium alloy microtube, the steps are as follows:

[0041] (1) In terms of mass percentage, in the alloy, the content of Y is 3.6%, the content of Nd is 2.1%, the content of La(Ce) is 0.2%, the content of Zr is 0.2%, and the rest is Mg. Good magnesium alloy raw materials are smelted and cast in a vacuum induction furnace with high-purity argon at a melting temperature of 800°C;

[0042] (2) Then keep it at a temperature of 495°C for 8 hours and cool it in air, keep it at a temperature of 485°C for 12 hours and cool it with the furnace. The cast alloy after heat treatment is processed into a cylindrical rod with a diameter of 30mm, and composite extrusion is performed through a conical die forward extrusion and an equal-diameter angular extrusion composite mold. First, the cylindrical rod is put into the composite mold and heated The heating temperature of the resistance wire is 510°C, and a 10KN press is used to extrude the co...

Embodiment 2

[0048] Embodiment 2: the preparation method of magnesium alloy microtube, the steps are as follows:

[0049] (1) In terms of mass percentage, in the alloy, the content of Y is 4.2%, the content of Nd is 2.5%, the content of La(Ce) is 0.8%, the content of Zr is 0.8%, and the rest is Mg. Good magnesium alloy raw materials are smelted and cast in a vacuum induction furnace with high-purity argon at a melting temperature of 800°C;

[0050] (2) Then keep it at a temperature of 495°C for 8 hours and cool it in air, keep it at a temperature of 485°C for 12 hours and cool it with the furnace. The cast alloy after heat treatment is processed into a cylindrical rod with a diameter of 30mm, and composite extrusion is performed through a conical die forward extrusion and an equal-diameter angular extrusion composite mold. First, the cylindrical rod is put into the composite mold and heated The heating temperature of the resistance wire is 510°C, and a 10KN press is used to extrude the co...

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Abstract

The invention provides a preparation method of a magnesium alloy microtubule and a special-purpose die. The preparation method comprises the following key steps: preparation of a cast magnesium alloy blank material; preparation of an ultra-fine grained blank material by a composite die; and the magnesium alloy microtubule is extruded by using an integrated heating method for the blank material and the die. The blank making mould of the magnesium alloy microtubule comprises a male die component, a female die component, and a guiding component, and a composite die is designed for conical die forward extrusion and equal channel angular extrusion. The ultra-fine grained medical magnesium alloy microtubule has the advantages of good mechanical properties, superior corrosion resistance, and high precision. The shaping process is high efficient and practical, the process is easy to operate, and subsequent processing processes are effectively simplified.

Description

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Claims

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Application Information

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Owner 常州市申鑫新材料科技有限公司
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