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。
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.
作者
邹涛
王鹏
董艳伍
姜周华
Zou Tao;Wang Peng;Dong Yanwu;Jiang Zhouhua(School of Metallurgy,Northeastern University,Shenyang 110819)
出处
《特殊钢》
2022年第6期1-7,共7页
Special Steel
基金
国家自然科学基金(52174303)
中央高校基本科研业务费(N2125026)。
