亚温淬火下组织形态对高强低合金钢冲击韧性的影响
发布时间：2018-08-26 07:45
【摘要】：以一种高强度低合金钢为研究对象,分析了淬火-亚温淬火-回火(RQ-IQ-T)工艺与控轧控冷-亚温淬火-回火(TMCP-IQT)工艺对组织演变及力学性能的影响,并对不同显微组织特征实验钢的冲击断裂行为进行讨论。结果表明:RQ-IQ-T工艺获得的显微组织由条状铁素体与回火马氏体构成,试样-40℃冲击功达到205 J;而TMCP-IQ-T工艺获得的显微组织则由块状铁素体与回火马氏体组成,试样具有较高的强度,但冲击功相对较低,仅为149 J。冲击裂纹在条状铁素体中扩展包括沿长轴方向和剪切条状铁素体两种方式;在块状铁素体中主要以穿晶方式进行扩展。经RQ-IQ-T工艺获得的条状铁素体与回火马氏体双相组织对裂纹扩展具有较大的阻碍作用,有利于冲击韧性的提高。
[Abstract]:Taking a kind of high strength low alloy steel as an example, the effects of quenching, subtemperature quenching and tempering (RQ-IQ-T) process and controlled rolling controlled cooling quenching tempering (TMCP-IQT) process on microstructure evolution and mechanical properties were analyzed. The impact fracture behavior of experimental steel with different microstructure characteristics was discussed. The results show that the microstructure obtained by the WRQ-IQ-T process is composed of stripe ferrite and tempered martensite, and the impact energy at -40 鈩，
本文编号：2204196
[Abstract]:Taking a kind of high strength low alloy steel as an example, the effects of quenching, subtemperature quenching and tempering (RQ-IQ-T) process and controlled rolling controlled cooling quenching tempering (TMCP-IQT) process on microstructure evolution and mechanical properties were analyzed. The impact fracture behavior of experimental steel with different microstructure characteristics was discussed. The results show that the microstructure obtained by the WRQ-IQ-T process is composed of stripe ferrite and tempered martensite, and the impact energy at -40 鈩，
本文编号：2204196
本文链接：https://www.wllwen.com/kejilunwen/jinshugongy/2204196.html
教材专著
