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Zinc alloy bar extruding process designing and optimizing method

A technology of process design and optimization method, applied in the field of non-ferrous metal processing and forming, to achieve the effects of low production efficiency, low yield and cost reduction

Active Publication Date: 2012-05-23
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching the existing technical literature, it is found that there are few patents related to the systematic research on the design and optimization of the extrusion process of zinc alloy rods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Semi-continuously cast Zn-10Al-2Cu zinc alloy ingots were machined into high-temperature compression and high-temperature tensile specimens. The temperature range of the high temperature compression test is 150-350°C, the temperature interval is 50°C, and the strain rate range is 0.001-10s -1 . The temperature range of the high-temperature tensile test is 200-320°C, the temperature interval is 30°C, and the strain rate range is 0.001-0.1s -1 . The constitutive equation system of zinc alloy was established by linear regression and nonlinear regression, the dynamic material model was used, the program was written by Matlab software, the processing map was established, and the microstructure and structure under different deformation conditions were observed by scanning electron microscope (EBSD) and metallographic microscope. Fracture analysis is used to determine the suitable deformation conditions for zinc alloy processing, and the suitable temperature range for hot pr...

Embodiment 2

[0026] Semi-continuously cast Zn-8Al-1Cu zinc alloy ingots were machined into high-temperature compression and high-temperature tensile specimens. The temperature range of the high-temperature compression test is 200-350°C, the temperature interval is 50°C, and the strain rate range is 0.001-10s -1 . The temperature range of the high-temperature tensile test is 200-320°C, the temperature interval is 30°C, and the strain rate range is 0.001-0.1s -1 . The constitutive equation system of zinc alloy was established by linear regression and nonlinear regression, the dynamic material model was used, the program was written by Matlab software, the processing map was established, and the microstructure and structure under different deformation conditions were observed by scanning electron microscope (EBSD) and metallographic microscope. Fracture analysis is used to determine the suitable deformation conditions for zinc alloy processing, and the suitable temperature range for hot pro...

Embodiment 3

[0028] Semi-continuously cast Zn-8Cu-0.3Ti zinc alloy ingots were used, and the ingots were machined into high-temperature compression and high-temperature tensile specimens. The temperature range of the high-temperature compression test is 200-400°C, the temperature interval is 40°C, and the strain rate range is 0.001-10s -1 . The temperature range of the high-temperature tensile test is 200-350°C, the temperature interval is 30°C, and the strain rate range is 0.001-0.1s-1. The constitutive equation system of zinc alloy was established by linear regression and nonlinear regression, the dynamic material model was used, the program was written by Matlab software, the processing map was established, and the microstructure and structure under different deformation conditions were observed by scanning electron microscope (EBSD) and metallographic microscope. Fracture analysis is used to determine the suitable deformation conditions for zinc alloy processing, and the suitable temp...

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Abstract

The invention relates to a zinc alloy bar extruding process designing and optimizing method, which comprises the steps of: obtaining a true-stress and true-strain curve of a zinc alloy by adopting a high-temperature compression and high-temperature tension test; establishing a constitutive equation and an operation drawing of the zinc alloy, carrying out microstructure analysis, researching a thermal deformational behavior, selecting a deformation condition suitable for processing; carrying out finite element numerical simulation, establishing an extrusion forming limit drawing, optimizing an extrusion process window, carrying out thermal extrusion to obtain a zinc alloy bar; and establishing an extrusion test data base, and predicting a relationship between the extrusion process and surface cracking, quality and performance of the extrusion bar by adopting a neutral network. The invention can realize optimal matching of all parameters in a process of extruding the zinc alloy bar, accurate control on the extruding process, and integration of process design, optimization and performance control. The prepared zinc alloy bar has the characteristics of better surface quality, fine and uniform textures, high performance, high pass percent and high production efficiency, is suitable for massive production, and has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to a process design and optimization method for extruding zinc alloy rods, belonging to the field of non-ferrous metal processing and forming. Background technique [0002] With the popularization of copper applications, copper resources are in short supply worldwide, and high-performance zinc alloy materials have the characteristics of light specific gravity, moderate strength, high hardness and low cost, and are known as new materials in the 21st century. Its strength, hardness, friction and other properties are similar to those of copper alloys. Therefore, research and development of new zinc alloys, replacing expensive copper with cheap zinc, has significant economic and social benefits, and is also the most promising way to alleviate the shortage of domestic copper resources. solution. After searching the existing technical literature, it is found that there are few patents related to the systematic research on the design an...

Claims

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Application Information

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IPC IPC(8): B21C23/02C22C18/04C22C18/02
Inventor 郭胜利李德富邬小萍杜鹏
Owner GRIMAT ENG INST CO LTD
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