Incomplete Austenitization of Patched Blanks in Hot Forming Die Quenching

被引：0
作者：
Jhajj, Kamalpreet S. [1 ]
Daun, Kyle J. [1 ]
Wells, Mary A. [1 ]
Slezak, Stan R. [2 ]
机构：
[1] Univ Waterloo, Dept Mech & Mechatron Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada
[2] Formet Ind, Waterloo, ON N5P 4J5, Canada
来源：
HOT SHEET METAL FORMING OF HIGH-PERFORMANCE STEEL CHS2 (5TH INTERNATIONAL CONFERENCE) | 2015年 / 05期
关键词：
HEAT-TRANSFER; CONVECTION;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In hot forming die quenching (HFDQ) patched blanks are sometimes used to locally-enhance the crash performance of the as-formed part. Occasionally, however, the patched regions are not fully austenitized, resulting in soft ferrite in the formed part. This paper investigates the origins of incomplete austenitization of patched blanks, and evaluates several candidate remediation strategies. Detailed heat transfer models of single gage and patched blanks are derived and used to predict the occurrence of incomplete austenitization. Various strategies to optimize the heating process for patched blanks are proposed and evaluated, including the use of a high emissivity coating to compensate for the increased thermal mass of the patch.
引用
收藏
页码：489 / 497
页数：9
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