Effect of molybdenum content on subcritical heat treatment behaviour of hypoeutectic 16 and 26 wt-% chromium cast irons

被引：10

作者：

Inthidech, S. ^{[1
]}

Sricharoenchai, P. ^{[2
]}

Matsubara, Y. ^{[3
]}

机构：

[1] Mahasarakham Univ, Fac Engn, Maha Sarakham, Thailand

[2] Chulalongkorn Univ, Dept Met Engn, Bangkok, Thailand

[3] Kurume Natl Coll Technol, Fukuoka, Japan

来源：

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2012年 / 25卷 / 05期

关键词：

Hypoeutectic high chromium cast iron; Mo content; Subcritical heat treatment; Hardness; Volume fraction of retained austenite; WHITE; TRANSFORMATION;

D O I：

10.1179/1743133612Y.0000000009

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Hypoeutectic high chromium cast irons containing 16 and 26 wt-% Cr, with and without Mo, were prepared to clarify the variation of hardness and volume fraction of retained austenite (V gamma) during subcritical heat treatment. As cast specimens were held at temperatures between 773 and 973 K for 21.6 ks (6 h) and air cooled with a fan. Hardness and V gamma values were measured in all specimens. In the subcritically heat treated state, secondary hardening similar to hardened tempered alloy cast irons and steels was observed. V gamma decreased gradually with rising temperature. The maximum hardness levels following subcritical heat treatment were obtained at temperatures between 823 and 873 K. The greatest improvement, an increase of 140 HV30, was obtained in 16 wt-% Cr cast iron with 3 wt-% Mo.

引用

页码：257 / 263

页数：7