ON THE FORMATION OF AUSTENITE DURING ION NITRIDING OF ARMCO IRON

被引：5

作者：

KURNY, ASW ^{[1
]}

MALLYA, RM ^{[1
]}

RAO, MM ^{[1
]}

机构：

[1] INDIAN INST SCI,DEPT MET,BANGALORE 560012,KARNATAKA,INDIA

来源：

JOURNAL OF THE LESS-COMMON METALS | 1988年 / 144卷 / 02期

关键词：

Nitrogen; -; X-Rays--Diffraction;

D O I：

10.1016/0022-5088(88)90132-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ion-nitriding behavior of Armco-iron in the temperature range of 475-550°C in a 25N2:75H2 gas mixture has been studied using optical metallography and X-ray diffraction techniques. The austenite phase was detected at short treatment times in the temperature range 500-550°C but it disappeared with increasing duration of treatment. It has been shown that nitrogen supersaturation in ferrite adjacent to the nitride layer causes its transformation to austenite. This austenite disappears by reacting with nitrogen to form the γ′ nitride.

引用

页码：201 / 207

页数：7

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