Ningbo Ningshing Precision Machinery Group Co., Ltd.Who We AreNo.25 Hongxiang Rd A area Industry, Hongtang Jiangbei, Ningbo, 315033, Zhejiang Province, ChinaFormerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., we are a holding subsidiary of Ningbo Ningshing Holdings Corporation.
After years of development, we have successfully realized the transformation of "industry supply chain ecosystem" from only trading to integrated operation, including distribution and retail, precision processing, intelligent manufacturing, vacuum heat treatment, technical services and international trade, etc.
As one of the largest special steel distribution enterprises in China with imported and homemade tool steel materials, Ningshing P
High Quality Hardening Requires High Quenching Rates
High Quality Hardening Requires High Quenching Rates
22/11/2022Article
The best toughness is achieved when the steel is martensitically hardened (high quench rate; cooling curve 1)
• If the cooling rate required for martensitic transformation cannot be achieved, the steel undergoes bainitic transformation. The achievable toughness is lower (cooling curve 3).
• At very slow cooling, the steel transforms into the pearlitic state: (cooling curve 4) very low toughness.
