On-Line Pre-Hardening Process of Large Plastic Die Steel

The thermal parameters of 3Cr2Mo plastic die steel were tested. The temperature fields of 3Cr2Mo plastic die steel with the thickness 120mm were calculated and analyzed under two quenching processes. The results showed that for interrupted process the cooling velocity was faster when the temperature...

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Bibliographic Details
Published in:Key engineering materials 2013-03, Vol.546, p.60-64
Main Authors: Zhu, Dong Mei, Zhang, Shao Jun, Li, Mou Wei, Liu, Guo Yong
Format: Article
Language:English
Subjects:
Cooling
Die steels
Hardness
Mathematical analysis
On-line systems
Temperature distribution
Tempering
Transformations
Online Access:Get full text
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Summary:The thermal parameters of 3Cr2Mo plastic die steel were tested. The temperature fields of 3Cr2Mo plastic die steel with the thickness 120mm were calculated and analyzed under two quenching processes. The results showed that for interrupted process the cooling velocity was faster when the temperature was more than 500°C, which was not in the transformation zone of bainite and martensite. And the fast cooling rate effectively avoided the pearlite appearance. When the temperature was less than 500°C, the cooling velocity under interrupted cooing process was slower, which avoided the big microstructure stress. So for the 3Cr2Mo plastic die steel with the thickness 120mm, the interrupted process was better. In the paper, the hardness was tested after interrupted cooling process and tempering. The tempering hardness difference was less than or equal to 3HRC. The study provided references for large plastic die steel on-line pre-hardening process formulation and optimization.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.546.60