Precipitation behavior of fine MX type carbide in Cr-Mo steels

被引：0

作者：

Yuga, Masao ^{[1
]}

Hayashi, Kenji ^{[2
]}

Endo, Shigeru ^{[3
]}

机构：

[1] JFE Steel Corporation, Steel Research Laboratory, Kawasaki-cho, Handa,475-8611, Japan

[2] JFE Steel Corporation, West Japan Works (Kurashiki), Mizushima, Kurashiki,712-8511, Japan

[3] JFE Steel Corporation, Steel Research Laboratory, Chuou-ku, Chiba,260-0835, Japan

来源：

Zairyo/Journal of the Society of Materials Science, Japan | 2015年 / 64卷 / 09期

关键词：

Binary alloys - Carbides - Chromium alloys - Coarsening - Molybdenum alloys - Titanium alloys - Heat treatment;

D O I：

10.2472/jsms.64.732

中图分类号：

学科分类号：

摘要：

This study deals with the influence of Ti addition on softening behavior of the martensite structure and precipitation behavior for 2 1/4Cr-1Mo-V steel. The fine MX type (Mo, V) C and (Mo, V, Ti ) C precipitate with heat treatment at from 600 to 700 deg. C after cooling from 1350 deg. C. These fine carbides coarse with the solute and precipitation of V, then the composition of carbides change to V-rich. (Mo, V, Ti) C in Ti-bearing steel keeps fine size even after long time heat treatment at high temperature. It is difficult to understand the retardation of coarsening of (Mo, V, Ti) C by Ostwald ripening theory. We therefore propose a hypothesis that (Mo, V, Ti) C is consequently maintained at fine size without coarsening by Ostwald ripening theory because the fine (Mo, V, Ti) C is practically insoluble due to very low solubility of Ti at heat treat temperature. ©2015 The Society of Materials Science, Japan.

引用

页码：732 / 738

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