Ce-Mg合金加入对GCr15轴承钢夹杂物和凝固组织的影响

doi:10.20057/j.1003-8620.2022-00161

特殊钢 ›› 2022, Vol. 43 ›› Issue (6): 1-7.DOI: 10.20057/j.1003-8620.2022-00161

所属专题：夹杂物控制；稀土冶金

• 轴承钢专栏 • 下一篇

Ce-Mg合金加入对GCr15轴承钢夹杂物和凝固组织的影响

邹涛，王鹏，董艳伍，姜周华

东北大学冶金学院

收稿日期:2022-09-05 出版日期:2022-12-01 发布日期:2022-11-22
通讯作者: 董艳伍
作者简介:邹涛(1995 -),男，博士
基金资助:
国家自然科学基金(52174303)；中央高校基本科研业务费(N2125026)

Effect of Adding Ce-Mg Alloy on Inclusion and Solidification Microstructure of GCr15 Bearing Steel

Zou Tao, Wang Peng, Dong Yanwu, Jiang Zhouhua

School of Metallurgy, Northeastern University, Shenyang 110819

Received:2022-09-05 Published:2022-12-01 Online:2022-11-22

摘要/Abstract

摘要： 研究了加Ce(0～0.32%)-Mg(0～0.04%)合金对GCr15轴承钢的铸态夹杂物和凝固组织的影响。结果表明：添加Ce-Mg合金，能够促使夹杂物改性，生成大量的形状较规则，尺寸细小，分布弥散的Ce、Mg夹杂物；并且当0.016%[Ce]、0.002%[Mg]时，夹杂物更为细小弥散。在凝固组织方面，随着Ce-Mg合金的增加，钢的铸态组织碳化物分布更为均匀，网状碳化物的网状结构变得更加纤薄，当0.016%[Ce]、0.002%[Mg]时，珠光体片层更为纤薄，片层间距更小。Ce-Mg合金的添加能够显著减弱钢中C和Cr在枝晶间与枝晶干的合金元素偏析，减少枝晶间距，阻碍枝晶的粗化。

关键词: GCr15钢, Ce-Mg合金, 夹杂物, 凝固组织, 珠光体片层

Abstract: The effects of adding Ce(0-0. 32% ) -Mg(0-0. 04% ) alloy on the as-cast inclusions and solidification organization of GCr15 bearing steel are investigated. The results show that the addition of Ce-Mg alloy can lead to the modification of inclusions and the generation of a large number of Ce-and Mg inclusions with regular shape, fine size and disperssed distribution ；and the inclusions are more fine and diffuse as 0.016% [ Ce] and 0.002% [ Mg]. With the increase of the mass fraction of Ce-Mg alloy, the distribution of carbides in the as-cast structure of steel becomes more uniform and the reticular carbide network structure becomes thinner, and as 0.016% [ Ce] and 0. 002% [ Mg], the pearlite lamellae is the thinner and the lamellae spacing is the minimized. The addition of Ce-Mg alloy can significantly reduce the segregation of C and Cr elements between dendrites and dendrite stem, and reduce the dendrite spacing to hinder the coarsening of dendrites.

Key words: GCr15 Steel, Ce-Mg Alloy, Inclusions, Solidification Microstnicture, Pearlite Lamellae

邹涛, 王鹏, 董艳伍, 姜周华. Ce-Mg合金加入对GCr15轴承钢夹杂物和凝固组织的影响[J]. 特殊钢, 2022, 43(6): 1-7.

Zou Tao, Wang Peng, Dong Yanwu, Jiang Zhouhua. Effect of Adding Ce-Mg Alloy on Inclusion and Solidification Microstructure of GCr15 Bearing Steel[J]. Special Steel, 2022, 43(6): 1-7.

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Ce-Mg合金加入对GCr15轴承钢夹杂物和凝固组织的影响

Effect of Adding Ce-Mg Alloy on Inclusion and Solidification Microstructure of GCr15 Bearing Steel

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