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Preparation method for zinc-based alloy specially-shaped tube

A special-shaped tube, zinc alloy technology

Active Publication Date: 2013-06-19
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, zinc alloy special-shaped pipes are mainly manufactured through the machining of zinc alloy solid profiles, which have problems such as low material utilization, high cost, and low production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of zinc-based alloy special-shaped pipes includes the following steps:

[0028] (1) The semi-continuous casting Zn-8Al-0.5Cu zinc alloy ingot is machined into a high-temperature compression sample for high-temperature compression. The temperature range of high-temperature compression is 200-360°C, the temperature interval is 40°C, and the strain rate range is 0.001~10s -1 . Establish the constitutive equation and processing diagram of the alloy, and determine that the temperature range suitable for hot processing of the alloy is 200-320°C, and the strain rate range is 0.01-1.3s -1 .

[0029] (2) The special-shaped Zn-8Al-0.5Cu zinc alloy pipe is square on the outside and circular on the inside, with a side length of 36mm and an inner diameter of 30mm. According to the size specifications of the product, the split flow combined die was preliminarily designed, and the finite element model of special-shaped pipe extrusion was established by using commerc...

Embodiment 2

[0035] The preparation of zinc-based alloy special-shaped pipes includes the following steps:

[0036] (1) The semi-continuous casting Zn-4Al-0.8Cu zinc alloy ingot is machined into a high-temperature compression sample for high-temperature compression, the temperature range is 200-360 °C, the temperature interval is 40 °C, and the strain rate range is 0.001-10s -1 . Establish the constitutive equation and processing diagram of the alloy, and determine the deformation conditions suitable for zinc alloy processing. The temperature range suitable for hot processing of the alloy is 200-340 °C, and the strain rate range is 0.01-1.6s -1 .

[0037] (2) The special-shaped Zn-4Al-0.8Cu zinc alloy pipe is hexagonal on the outside and circular on the inside, with a side length of 16mm and an inner diameter of 20mm. According to the size specifications of the product, the split flow combined die was preliminarily designed, and the finite element model of special-shaped pipe extrusion w...

Embodiment 3

[0043] The preparation of zinc-based alloy special-shaped pipes includes the following steps:

[0044] (1) The semi-continuous casting Zn-4Cu-0.1Ti zinc alloy ingot was machined into a high-temperature compression sample for high-temperature compression. The temperature range of high temperature compression is 220~420℃, the temperature interval is 40℃, and the strain rate range is 0.001~10s -1 . Establish the constitutive equation and processing diagram of the alloy, and determine the suitable deformation conditions for zinc alloy processing. The suitable temperature range for hot processing of this alloy is 240-380 °C, and the strain rate range is 0.01-4.2s -1 .

[0045] (2) The special-shaped Zn-4Cu-0.1Ti zinc alloy pipe is hexagonal and circular inside, the side length of the outer hexagon is 10mm, and the diameter of the inner circle is 12mm. According to the size specifications of the product, the split flow combined die was preliminarily designed, and the finite eleme...

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Abstract

The invention relates to a preparation method for zinc-based alloy specially-shaped tube. The preparation method for zinc-based alloy specially-shaped tube comprises the following steps of: (1) establishing a constitutive equation and a working diagram by adopting a high-temperature compression test, so as to obtain deformation conditions suitable for processing zinc alloy; (2) performing a finite element numerical simulation on zinc alloy porthole die extrusion, so as to optimize die structure and extrusion process; (3) heating a zinc alloy ingot blank in an induction furnace, and then performing hot extrusion by selecting the optimized die structure and process parameters, so as to obtain a specially-shaped tube blank with an approximate final size; (4) performing fixed short core rod pulling, so as to obtain the specially-shaped tube with a finished size; (5) performing cleaning and heat treatment; and (6) straightening, so as to obtain the finished tube. The method disclosed by the invention is short in process, high in material utilization rate, low in cost, high in added value, and suitable for large-scale production; and the prepared zinc-based alloy specially-shaped tube can be used for replacing a part of brass specially-shaped tubes, plays a promotion role on relief for the copper resource shortage of China to a certain extent, and has economic benefits and social benefits to a certain extent.

Description

technical field [0001] The invention relates to a method for preparing a zinc-based alloy special-shaped pipe, belonging to the field of nonferrous metal processing and forming. Background technique [0002] As important raw materials, copper and copper alloys are widely used in the fields of electric power, electronics, communications, aviation, spaceflight, and transportation. With the rapid development of the national economy, my country has become the world's largest consumer of copper resources, but my country's copper resources are very poor, and the self-sufficiency rate has been seriously insufficient in recent years, which has affected the sustainable and healthy development of my country's copper industry and related industries. Therefore, it is imminent to research and develop other new metal materials to replace copper alloy materials and save copper resources. [0003] The mineral reserves, output and consumption of zinc are second only to aluminum and copper a...

Claims

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Application Information

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IPC IPC(8): B21C37/06C22F1/16
Inventor 郭胜利
Owner GRIMAT ENG INST CO LTD
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