ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (3): 52-54.

• 组织和性能 • 上一篇    下一篇

Al对M2高速钢铸态组织的影响

周雪峰1, 方峰1, 蒋建清1, 李德辉2, 朱旺龙2   

  1. 1东南大学江苏省先进金属材料高技术研究重点实验室,南京211189;
    2天工集团,丹阳215400
  • 收稿日期:2008-11-13 出版日期:2009-06-01 发布日期:2022-11-24
  • 作者简介:周雪峰(1982-),男,博士研究生,从事高性能高速钢研究。
  • 基金资助:
    江苏省科技成果转化资金专向资助项目 (BA2005053)

Effect of Al on Structure of As-cast High Speed Steel M2

Zhou Xuefeng1 , Fang Feng1 , Jiang jianqing1 , Li Dehui2 , Zhu Wanglong2   

  1. 1 Jiangsu Key Lab of Advanced Metallic Materials, Southeast University, Nanjing 211189;
    2 Tiangong Group, Danyang 215400
  • Received:2008-11-13 Published:2009-06-01 Online:2022-11-24

摘要: 试验M2高速钢(%:0.85C、5.92W、4.74Mo、3.86Cr、1.81V)由25 kg真空感应炉熔炼,并用砂型铸造成锭。研究了0~1.3%Al对钢铸态组织的影响。结果表明,加入0.6%Al,可细化共晶莱氏体网,改善碳化物分布;加入过量Al(1.3%),初生晶粒内部出现大量由δ铁素体通过共析转变产生的针状碳化物。Al促进M2C共晶碳化物形态由弯曲棒状变为平直片层状,并提高其合金元素含量。与片层状M2C相比,棒状M2C在高温易分解成短棒状或球状碳化物,有利改善碳化物形态。

关键词: Al, 高速钢M2, 铸态组织, M2C共晶碳化物

Abstract: Test high speed steel M2 ( % : 0. 85C, 5. 92W. 4. 74Mo, 3. 86Cr, 1. 84V) was melted by 25kg vacuum induction furnace and ingot was cast bv sand mould. The effect of 0 ~ 1. 3% Al on stiucture of as-cast steel has been studied. Results showed that added 0. 6% Al was available to fine the ledeburite network and improve the distribution of carbides in steel ; while added excessive amount of Al (1. 3% ) promoted the formation of a great lot of acicular carbide eutectoid-transformed from δ ferrite in primary grain. Al promoted the  M2C carbide translbrnied from curved rod-like to straight lamella-like in which the alloy element content increased. Compared with lamellar M2C, the rod-like M2C easily decomposed short rod-like and granular carbides favorably to improve the morphology of carbide in steel.