正火对16Mn热轧钢板断裂韧度J_(ⅠC)的影响

Influence of normalizing on fracture toughness J_(ⅠC) of hot-rolled 16Mn steel

通过对16Mn热轧钢板正火前后的常规力学性能测试数据的分析及对金相组织的观察,特别是对延性断裂韧度JⅠC测试数据的比较,认为采用断裂韧度JⅠC检验热轧钢板热处理后的力学性能是一种必要而有效的方法.采用这种方法检测,可以更准确地考察钢材抵抗疲劳断裂的性能,因而优于常规方法的力学性能检测.

Through analysis and observation of its normal mechanical behavior, metallographic structure, and in particular its ductile fracture toughness JIC, a better and more efficient method is proposed to examine the mechanical property of hot-rolled steel normalizing, which is using the ductile fracture toughness JIC as a key indicator. This method is more accurate than using normal mechanical behavior in determining the fracture and fatigue property of steel. It is of practical significance in guaranteeing the safety of steel when its structures and spare parts are under cyclical loads.