Abstract:Impact-toughness of Mn-series bainitic steel with carbon content less than 0.3% and different Silicon content after tempering were studied. Results show that the temperature of peak value of toughness increases from 220℃ to 340℃ with increasing of the silicon content during stage of low temperature tempering, and the temperature of valley value of toughness increases from 340℃ to 520℃. It’s related to the characteristics of Si that it can stable residual austenite、and inhibit precipitating of carbide. The steel may exhibit perfect toughness with low content of Si after tempered at high temperature, while exhibit good toughness with high content of Si after tempered at low temperature. The steel with carbon content lower than 0.08% can exhibit perfect toughness after tempered at low or high temperature, which is with no terms of Si. However, for the steel with high carbon content, it can not exhibit good toughness after tempered at any temperature.
王勇围. 碳和硅对Mn系空冷贝氏体钢回火韧性的影响[J]. 钢铁, 2009, 44(12): 71-71.
Yong-Wei WANG. Effection of C and Si on the toughness of Mn-series air cooling bainitic steel after tempering. Iron and Steel, 2009, 44(12): 71-71.