• CN:11-2187/TH
  • ISSN:0577-6686

›› 1995, Vol. 31 ›› Issue (5): 91-96.

• 论文 • 上一篇    下一篇

18-4-1高速钢真空油淬白亮层和熔化层形成原因的探讨

邬占田;刘喜明;郭久柱;隋福楼;侯振文   

  1. 吉林工学院
  • 发布日期:1995-09-01

STUDY ON THE WHITE LAYER AND MELTED LAYER FORMED ON THE SURFACE OF A VACUUM HEATED 18-4-1 HIGH SPEED STEEL AFTER OIL QUENCHING

Wu Zhantian;Liu Ximing;Guo Jiuzhu;Sui Fulou;Hou Zhenwen   

  1. Jilin Institute of Technology
  • Published:1995-09-01

摘要: 利用金相、扫描电镜和电子控针等手段对18-4-1高速钢真空加热油淬后表面出现的白亮层和熔化层进行了试验研究。研究表明,白亮层和熔化层均是真空加热油淬瞬间增碳的结果,白亮层金相组织为大量残余奥氏体加少量马氏体加M6C型粒状碳化物,增碳必须具备真空加热,试样高温淬火和油作淬火介质三个条件。

关键词: 白亮层, 高温钢, 熔化层, 真空油淬

Abstract: By means of metallography, scanning electron microscopy and electron-beam microprobe, the white layer and the melted layer formed on the surface of a vacuum heated 18-4-1 high speed steel after oil quenching are studied. The results show that both layers are arisen from the instantaneous carbon pick-up during the oil quench after vacuum heating. The microstructure of the white layer consists of a large amount of retained austenite with some martensite and granular M6C type carbide. The necessary conditions for the carbon pick-up are vacuum high temperature heating and the use of oil as a quenchant.

Key words: High speed steel, Melted layer, Vacuum heated oil quenching, White layer