SUJ2材の焼入れ組織に及ぼす高周波誘導加熱条件の影響

When JIS-SUJ2 steel is hardened by induction heating, high temperature austenitizing is applied in order to achieve high productivity. In this case, SUJ2 is quenched from the single-phase austenite zone. As a result, the properties of SUJ2 may be different from the conventional furnace process invol...

Full description

Saved in:
Bibliographic Details
Published in鉄と鋼 Vol. 103; no. 4; pp. 194 - 200
Main Authors 結城, 敬史, 佐藤, 美有, 大木, 力
Format Journal Article
LanguageJapanese
Published 一般社団法人 日本鉄鋼協会 2017
Subjects
bearing steel
grain size
heat treatment
induction heating
retained austenite
Online AccessGet full text
ISSN0021-1575
1883-2954
DOI10.2355/tetsutohagane.TETSU-2016-058

Cover

More Information
Summary:When JIS-SUJ2 steel is hardened by induction heating, high temperature austenitizing is applied in order to achieve high productivity. In this case, SUJ2 is quenched from the single-phase austenite zone. As a result, the properties of SUJ2 may be different from the conventional furnace process involving SUJ2 quenched from the two-phase austenite / cementite zone. In this study, we experimentally investigated the relation between the amount of undissolved carbide, austenitizing temperature, and duration. Additionally, we developed a prediction formula for undissolved carbide in the single-phase austenite zone. The formula is consists of the Arrhenius equation and the Kolomogorov-Johnson-Mehl-Avrami equation. Subsequently, the effect of austenitizing temperature and amount of undissolved carbide on hardness, retained austenite content, prior-austenite grain size, and martensite block size were investigated.
ISSN:0021-1575
1883-2954
DOI:10.2355/tetsutohagane.TETSU-2016-058