MACROSCOPIC CHARACTERISTICS OF PLASMA-NITRIDED AISI-4340 STEEL

被引：2

作者：

LAWALL, IT

MUZART, JL

KUHNARROYO, I

DESOUZA, AR

机构：

[1] Depto. de Fisica/LABMAT-UFSC, Florianópolis-SC

来源：

JOURNAL OF MATERIALS SCIENCE | 1993年 / 28卷 / 18期

关键词：

D O I：

10.1007/BF00361174

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plasma-nitrided AISI 4340 steel, in a low-pressure abnormal glow discharge was studied. The layer formation and their characteristics, were studied as a function of the main macroscopic parameters of the gas discharge: gas flow, N2/H-2 mixture, treatment time and sample temperature. The nitrided layers were characterized using a metallographic microscope coupled to a microhardness tester and X-ray techniques. Typical results obtained for samples which were nitrided for 2 h in a gas mixture of 0.9N2 + 0.1 H-2 at 793 K, showed a white layer composed of epsilon and gamma' phases, 20 mum thick, and a 1 100 HV20 microhardness.

引用

页码：5036 / 5039

页数：4

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