Effect of RE Compound Modification on Properties and As-cast Microstructure of High Carbon-Chromium Alloy Steel

Cheng Maolin; Song Yanpei; Xu Lin; Shi Xiaofei; Liu Bingchun; Lu Chao; Chen Shuai

doi:10.15980/j.tzzz.2014.07.010

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Effect of RE Compound Modification on Properties and As-cast Microstructure of High Carbon-Chromium Alloy Steel
Vol. 34, Issue 7, Pages: 700-702(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.07.010

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[1]陈茂林,宋延沛,徐林,时晓飞,刘冰春,卢超,陈帅.RE复合变质处理对高碳高铬钢组织与性能的影响[J].特种铸造及有色合金,2014,34(07):700-702.

Cheng Maolin, Song Yanpei, Xu Lin, et al. Effect of RE Compound Modification on Properties and As-cast Microstructure of High Carbon-Chromium Alloy Steel. [J]. Special Casting & Nonferrous Alloys 34(7):700-702(2014)
[1]陈茂林,宋延沛,徐林,时晓飞,刘冰春,卢超,陈帅.RE复合变质处理对高碳高铬钢组织与性能的影响[J].特种铸造及有色合金,2014,34(07):700-702. DOI： 10.15980/j.tzzz.2014.07.010.

Cheng Maolin, Song Yanpei, Xu Lin, et al. Effect of RE Compound Modification on Properties and As-cast Microstructure of High Carbon-Chromium Alloy Steel. [J]. Special Casting & Nonferrous Alloys 34(7):700-702(2014) DOI： 10.15980/j.tzzz.2014.07.010.

摘要

以高碳高铬钢为研究对象

通过变质处理研究了RE-Na/K和RE-Na/K-Ti两种RE复合变质剂对高碳高铬钢显微组织和力学性能的影响。结果表明

高碳高铬钢经两种RE复合变质处理后

其组织中奥氏体晶粒得到细化

网状碳化物出现颈缩断开现象。高碳高铬合金钢的力学性能明显改善

硬度（HRC）和冲击韧度分别达到了41.5和7.6 J/cm2

比未变质处理的试验钢分别提高了2.9%和28.8%。RE-Na/K-Ti的变质效果优于RE-Na/K的变质效果。

Abstract

Effects of the both RE-Na /K and RE-Na /K-Ti compound modifier on the microstructure and properties of the high carbon-chromium alloy steel were investigated. The results show that both of the modifiers added in the high carbon-chromium alloy steel can refine the primary austenite effectively. The RE compound modifiers can play a obvious role in grain refinement

promoting network eutectic carbides dis-connection through constriction. Mechanical properties of the high carbon-chromium alloy steel are obviously improved

and hardness and impact toughness reach 41. 5HRC and 7. 6 J /cm2

respectively

increased by 2.9% and by 28.8% compared with the unmodified steel. Re-Na /K-Ti modified agent is superior to RE-Na /K modified agent in modification effects.