金属学报  1984, Vol. 20 Issue (5): 322-450

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稀土元素对Cr-Ni-Mo钢过热的影响

刘树模;陈宝琴;白瑛

内蒙古金属材料研究所;内蒙古金属材料研究所;内蒙古金属材料研究所

EFFECT OF RARE EARTH ADDITIONS ON OVERHEATING OF Cr-Ni-Mo STEELS

LIU Shumo; CHEN Baoqin: BAI Ying (Nei Monggol Institute of Metallic Materials; Baotou)(Manuscript received 27 December; 1982; revised manuscript 22 January; 1984)

刘树模;陈宝琴;白瑛. 稀土元素对Cr-Ni-Mo钢过热的影响[J]. 金属学报, 1984, 20(5): 322-450.
, , . EFFECT OF RARE EARTH ADDITIONS ON OVERHEATING OF Cr-Ni-Mo STEELS[J]. Acta Metall Sin, 1984, 20(5): 322-450.

摘要 参考文献 相关文章 Metrics 全文: PDF(1890 KB)   摘要: 本文研究了几种Cr-Ni-Mo钢的过热特征,提出把断口表面出现延性沿晶小平面作为过热的判据。在高的奥氏体化温度下,某种第二相粒子可以固溶,随后在冷却过程中沿高温奥氏体晶界重新析出,因而产生各种过热现象。MnS粒子的重新析出使普通硫含量的Cr-Ni-Mo钢发生沿晶延性破断,而AlN或VC粒子在高温奥氏体晶界的重新析出也能使低硫的Cr-Ni-Mo钢过热。稀土元素对几种Cr-Ni-Mo钢的过热都有抑制作用。当RE/S达到临界比值(约为4)时,不仅使MnS夹杂物完全转变成稀土硫化物和稀土硫氧化物,而且使高温奥氏体晶粒显著细化,改善韧性。如果RE/S比值远大于4,多余的稀土元素还可能与C,N原子发生交互作用。 Abstract：The overheating behaviour of several experimental Cr-Ni-Mo steels has been investigated whereby the appearance of the ductile intergranular facets on the fracture surface may be considered as a criterion of overheating. Different overheating phenomena were resulted from that the particles of certain second phase dissolved in the solid solution at high austenization temperature and then reprecipitated along the prior austenite grain boundaries during cooling. It was observed in the Cr-Ni-Mo steels that the intergranular ductile fracture is caused by the reprecipitation of MnS particles in the steel with ordinary S content, and the overheating is also performed by the repreeipitation of AlN or VC particles along the prior austenite grain boundaries in one containing low S. Thus, a proposal seems to be made that the mechanism of overheating of Cr-Ni-Mo steels is related to the solution and reprecipitation of MnS, AlN or VC particles along the prior austenite grain boundaries. The RE additions may act as an inhibitor for the overheating of certain Cr-Ni-Mo steels. If the RE/S ratio reached a critical value, namely about 4, not only the MnS inclusion is completely converted into sulphide and oxysulphide of RE, but also the prior austenite grain is remarkedly refined and their toughness is improved. While the ratio was much greater than 4, the excess RE may be interacted with atoms of C or N. 收稿日期: 1984-05-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 刘树模 陈宝琴 白瑛 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1984/V20/I5/322 1 Ko, T.; Hanson, D., J.Iron Steel Inst., 164 (1950) , 51． 2 Schulz, B. J.; McMahon, C. J., Metall. Trans., 4(1973) , 2485． 3 #12 4 周子年;金嘉陵;徐祖耀,金属热处理学报,2(1981) ,28． 5 Glue, D. R.; Jones, C. H.; Lloyd, H. K. M., Met. Technol., 2(1975) , 416． 6 Waudby, P. E., Int. Metall. Rev., 23 (1978) , 74．4 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed