Numerical simulation of quenching of large sized blocks of 718 steel used for plastic dies

被引：3
|
作者：
Song, DL [1 ]
Gu, JF [1 ]
Pan, JS [1 ]
Hu, MJ [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2004年 / 20卷 / 12期
关键词：
quenching; numerical simulation; hardness; 718 steel used for plastic die; finite element method (FEM);
D O I：
10.1179/026708304225022160
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The 718 steel used for plastic dies is required to be prehardened to 29 - 35HRC. For large sized blocks, it is relatively difficult to additionally guarantee uniform hardness with the greatest hardness difference of 3HRC and without any quenching cracks after heat treatment. In this paper, the transient temperature field and microstructure transformation during the quenching process of large sized blocks of 718 steel have been simulated numerically. Based on the simulation and experimental results, an appropriate quenching process, that is, direct air cooled quenching after austenitising at higher temperatures such as 880 - 930degreesC, was recommended in order to reach hardness uniformity and avoid quenching cracks.
引用
收藏
页码：1567 / 1572
页数：6
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