Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (4): 261-266.DOI: 10.11890/1006-7191-104-261

• 研究论文 • 上一篇    下一篇

Secondary hardening behavior of 15CrMnMoV thin rolled tube

丁慈,韩维新   

  1. 中国科学院金属研究所
  • 收稿日期:2010-04-19 修回日期:2010-05-18 出版日期:2010-08-25 发布日期:2010-08-11
  • 通讯作者: 丁慈

Secondary hardening behavior of 15CrMnMoV thin rolled tube

Ci DING,Weixin HAN   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2010-04-19 Revised:2010-05-18 Online:2010-08-25 Published:2010-08-11
  • Contact: Weixin HAN

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关键词: 15CrMnMoV steel, Secondary hardening, Alloy carbides

Abstract:

15CrMnMoV rolled tube is applied to many critical parts of helicopter. The secondary hardening behavior of the steel which varied with the treating process is essential for further usage. In this paper, the secondary hardening behavior of water quenched, oil quenched and air cooled steel are compared. The precipitations of alloy carbides are analyzed by electrolytic extraction, X-ray diffraction, optical microscopy as well as scanning electron microscopy. Results show that the secondary hardening effect in the air cooled steel is higher than in the water quenched and oil quenched steel, but the toughness decreases more seriously, due to more precipitation of Mo2C and VC.

Key words: 15CrMnMoV steel, Secondary hardening, Alloy carbides