Failure and Material Selection of the Mold Used for Ferrous Metal in Semi-solid Rheological Forming

He Shuhua Zhang Lizhong Jiao Zhongs heng Liu Jinxiang Chen Yu Liu Wen Xing Shuming

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Failure and Material Selection of the Mold Used for Ferrous Metal in Semi-solid Rheological Forming
Issue 2, Pages: 33-35(2004)
Published： 2004 ，
DOI：

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[1]何书华,,,,,,,,,张励忠,,,,,,,,,焦众生,,,,,,,,,刘金香,,,,,,,,,陈宇,,,,,,,,,刘文,,,,,,,,,邢书明.半固态金属流变成形模具失效与选材[J].特种铸造及有色合金,2004(02):33-35+2-3.

He Shuhua Zhang Lizhong Jiao Zhongs heng Liu Jinxiang Chen Yu Liu Wen Xing Shuming. Failure and Material Selection of the Mold Used for Ferrous Metal in Semi-solid Rheological Forming. [J]. Special Casting & Nonferrous Alloys (2):33-35(2004)
[1]何书华,,,,,,,,,张励忠,,,,,,,,,焦众生,,,,,,,,,刘金香,,,,,,,,,陈宇,,,,,,,,,刘文,,,,,,,,,邢书明.半固态金属流变成形模具失效与选材[J].特种铸造及有色合金,2004(02):33-35+2-3. DOI：

He Shuhua Zhang Lizhong Jiao Zhongs heng Liu Jinxiang Chen Yu Liu Wen Xing Shuming. Failure and Material Selection of the Mold Used for Ferrous Metal in Semi-solid Rheological Forming. [J]. Special Casting & Nonferrous Alloys (2):33-35(2004) DOI：

摘要

半固态流变成形模具的研究是半固态成形技术的一个重要组成部分

目前还没有引起足够的重视。根据半固态流变成形模具的工作原理和黑色金属流变成形的工作条件

分析指出了其主要失效形式是热疲劳、熔蚀和变形

模具材料的关键性能指标是高温疲劳强度、抗氧化性以及较低的线膨胀系数等。通过对常用模具材料优缺点的分析

得出了以下结论 :目前国内外还没有真正适合黑色金属半固态流变成形的模具材料

采用复合材料和表面处理技术是提高模具寿命的有效途径

Abstract

Although the research on the mold used for semi-soli d alloy rheological forming is a main part of the semi-solid alloy rheological fo rming

attractive attention hasn’t yet been paid. According to the analysis on th e running principle of mold and the working conditions of ferrous metal in semi -solid rheological forming

it is found that the main failures of mold include thermal fatigue

melt erosion and deformation. It is also pointed out that the k ey properties of mold material include fatigue strength at high temperature

the oxidation resistance and the lower linear expansion rate. With analysis of both advantages and disavatages of conventional mold materials

it is concluded that there aren’t any mold materials suitable for ferrous metal in semi-solid rheol ogical forming at home and abroad now. It is a effective approch to improve the mold service life using composites and surface treatment methodes.