A method for displaying the grain of medium and high strength steel
WANG Jun-yi1， CHEN Jie2， LIU Xin-kuan2
1.Bao steel Research Institute，Shanghai 201900，China
2.School of Materials Science and Engineering，University of Shanghai for Science and Technology，Shanghai 200093，China
Abstract：With the gradual increase of carbon content inmediumand high strength steels，the microstructure becomes finer，and the grainboundaries obtained by using traditional methods such as direct corrosion are often vague. In order to clearly show the grain size of medium and high strength steels，a grain size test method for it is proposed by using the characteristics of hydrogen embrittlement and intergranular fracture result from hydrogen embrittlement.Through the direct corrosion，EBSD method and hydrogen induced cracking method，the grain boundaries of 55SiCr spring steel and 440 steel arerespectively shown. It can be seen that the grain boundaries shown by the hydrogen-induced cracking method are clearer in the grain size measurement for medium and high strength steels.The result for the assessment is more accurate.
收稿日期: 2018-08-15
引用本文:
王军艺，陈杰，刘新宽. 一种用于显示中高强度钢晶粒的方法[J]. 物理测试, 2019, 37(2): 15-19.
WANG Jun-yi， CHEN Jie， LIU Xin-kuan. A method for displaying the grain of medium and high strength steel. PHYSICS EXAMINATION AND TESTING, 2019, 37(2): 15-19.
2019, Vol. 37 
