高强钢低温韧性的影响因素简析

Analysis on Factors Affecting Toughness of High Strength Steel at Low Temperature

在高强钢中,常常使用多种强化方式来提高强度,很容易引入不利于韧性的因素,导致韧脆转变温度升高,冲击功下降。为了探寻提高冲击韧性的有效方法,增强高强钢安全服役的可靠性,从基体组织、第二相和晶界偏析三个方面总结分析了其对低温韧性的影响,期望能为解决高强钢中低温韧性较低的问题提供有效的解决思路和方法,也为高强高韧钢的设计和制备提供参考。

As far as high strength steels concerned,many strengthening methods are commonly used to improve strength,it is easy to introduce adverse factors to the toughness,resulting in the increasing of ductile-brittle transition temperatures and decreasing of impact energy.In order to explore effective methods for improving impact toughness and enhance the reliability of high strength steel in safe service,the effect of microstructures in matrix,second phase and grainboundary segregation in terms of the high strength steel on low temperature toughness was summarized and analyzed,hoping to provide effective ideas and solutions for solving the problem poor toughness of high strength steels at low temperature,and also provide the reference for designing and producing high strength and high toughness steels.