电脉冲对高硼中碳合金钢凝固组织的影响

李秋炎; 岑启宏; 蒋业华; 周荣锋

doi:10.15980/j.tzzz.2012.12.017

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电脉冲对高硼中碳合金钢凝固组织的影响
Effects of Electric Pulse on Solidification Structure of High-Boron Middle-Carbon Alloy Steel
2012年32卷第12期页码：1095-1098
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.12.017

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[1]李秋炎,岑启宏,蒋业华,周荣锋.电脉冲对高硼中碳合金钢凝固组织的影响[J].特种铸造及有色合金,2012,32(12):1095-1098.

Li Qiuyan1, Cen Qihong1, Jiang Yehua1, et al. Effects of Electric Pulse on Solidification Structure of High-Boron Middle-Carbon Alloy Steel[J]. Special Casting & Nonferrous Alloys, 2012,32(12):1095-1098.
[1]李秋炎,岑启宏,蒋业华,周荣锋.电脉冲对高硼中碳合金钢凝固组织的影响[J].特种铸造及有色合金,2012,32(12):1095-1098. DOI： 10.15980/j.tzzz.2012.12.017.

Li Qiuyan1, Cen Qihong1, Jiang Yehua1, et al. Effects of Electric Pulse on Solidification Structure of High-Boron Middle-Carbon Alloy Steel[J]. Special Casting & Nonferrous Alloys, 2012,32(12):1095-1098. DOI： 10.15980/j.tzzz.2012.12.017.

摘要

研究了高硼中碳合金钢凝固过程中施加电脉冲的凝固组织。结果表明

经过电脉冲处理

高硼中碳合金钢晶粒得到细化

晶粒形状趋于圆整

分布更加均匀

马氏体片层间距减小

硬质相体积分数由未经电脉冲处理时的10.6%降低到8.3%

基体中W、Cr、Mo、V等合金元素含量上升

基体硬度由HV664提高到HV730

网状硬质相产生断网现象

并且有孤立球化趋势。分析认为

以上是电脉冲的焦耳热效应、电磁力作用、电迁移效应共同作用的结果。

Abstract

Effect of electric pulse on the solidification structure of high-boron middle-carbon alloy steel was investigated by exerting electric pulse on the alloy steel during solidification process.The results indicate that

after electric current pulse treatment

grains of high-boron middle-carbon alloy steel are refined and spheroidized with more uniform distribution.Martensite lamellar spacing is decreased

and volume fraction of hard phase is decreased from 10.6% in non-electric pulse treatment to 8.3%

however

alloying elements

such as W

V in matrix are increased.In addition

hardness of matrix is improved from HV664 to HV739.Net-like hard phase exhibits discontinuous and isolated spheroidization.The co-action of Joule heat

magnetic-electric force and electric migration of electric pulse is responsible for the above effects.