Carbides in low-temperature-carburized stainless steels

被引：61

作者：

Ernst, F ^{[1
]}

Cao, Y ^{[1
]}

Michal, GM ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 06期

关键词：

austenitic steels; surface alloying; colossal supersaturation; carbides; electron diffraction;

D O I：

10.1016/j.actamat.2003.11.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel, low-temperature (470 degreesC) gas-phase carburization treatment, developed by the Swagelok Company, increases the surface hardness of 316-type austenitic stainless steels from approximate to200 to approximate to1000HV25 via a colossal supersaturation of up to 12 at.% carbon in solid Solution. Upon extended treatment, carbide precipitation does eventually occur. Transmission electron microscopy of carburized bulk, foil, and powder samples has revealed two different carbides: M5C2 ("Hagg" or "chi" carbide) and M7C3. Tile particles of both carbides have the shape of long needles or laths, contain a high density of planar defects normal to the particle axis, and adopt special topotaxial orientation relationships with the atistenite matrix. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1469 / 1477

页数：9

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