EFFECT OF QUENCH RATE ON MICROSTRUCTURE AND TENSILE PROPERTIES OF AISI 4320 AND 4340 STEELS.

被引：0
|
作者：
Tomita, Yoshiyuki [1 ]
Okabayashi, Kunio [1 ]
机构：
[1] Univ of Osaka Prefecture, Sakai, Jpn, Univ of Osaka Prefecture, Sakai, Jpn
来源：
Metallurgical transactions. A, Physical metallurgy and materials science | 1987年 / 18 A卷 / 01期
关键词：
IRON AND STEEL METALLOGRAPHY - Microstructures - STEEL - Mechanical Properties;
D O I：
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学科分类号：
摘要：
The steels were quenched from various temperatures from 1323 to 1473 K at two different quench rates using iced brine (fast quench treatment) and oil held at 373 K (slow quench treatment). Tensile properties after double-tempering at 473 K with intermediate quenching and refrigeration were determined at ambient temperature (293 K). The microstructural changes accompanying these quench rates were examined by optical and thin-foil transmission electron microscopic techniques. It is suggested that the beneficial effect on strength of the slowly-quenched steels is caused by a dispersion-hardening effect due to carbon segregation or fine carbide precipitation in the martensite during the quench (i. e. , autotempering).
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页码：115 / 121
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