| 摘 要： | When the 45 and 40 Cr Steel parts are quenched in a medium with different concentrations, an isolating polymer film can form on the metal surface during the cooling cycle, resulting in deeper hardening depth and less distortion than when quenched in water or oil. Quenching crack can also be prevented. In addition, normal microstructure and satisfactory mechanical properties can be reached. Test results show that these quenchants are particularly effective for the quenching of steel parts. This paper finally elucidates some of the managing problems of CH-202M quenchant in practical use.
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