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

Abstract:

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.

• Periodical: Key Engineering Materials (Volume 546)
• Pages: 60-64
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.546.60
• Online since: March 2013
• Authors: Dong Mei Zhu, Guo Yong Liu, Shao Jun Zhang, Mou Wei Li
• Keywords: Large Plastic Die Steel, Numerical Simulation, On-Line Pre-Hardening

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