18Ni马氏体时效钢原始奥氏体晶界显示方法  

Display method of original austenite grain boundary of 18Ni maraging steel

作　　者：谷秀锐 张鹏 孙晓冉 孙江欢 GU Xiurui;ZHANG Peng;SUN Xiaoran;SUN Jianghuan(Hesteel Group Technology Research Institute,Shijiazhuang 050000,China)

机构地区：[1]河钢集团钢研总院,河北石家庄050000

出　　处：《物理测试》2022年第3期27-30,共4页Physics Examination and Testing

摘　　要：利用光学显微镜(蔡司),在室温下,通过配制不同成分、浓度浸蚀剂和化学浸蚀方法,对经不同温度处理后的18Ni马氏体时效钢的原始奥氏体晶界显示方法进行了系统研究。结果表明:采用腐蚀性强、浓度高的浸蚀剂只能获得18Ni马氏体时效钢的金相显微组织,而采用体积比为4%的硝酸酒精溶液,对800~925℃固溶空冷后的18Ni马氏体时效钢试样进行化学浸蚀,能清晰地显示出18Ni马氏体时效钢试样原始奥氏体晶界,并可以进行准确的晶粒度级别数评定。The etchants with different composition and concentration were prepared at room temperature. The display method of original austenite grain boundary of 18 Ni maraging steel after treatment by chemical etching at different temperatures was studied using optical microscope(Zeiss).The experimental results showed that only the metallographic microstructure of 18 Ni maraging steel could be obtained when the etchant with strong corrosivity and high concentration was adopted. However, as 4%(volume fraction) nitric acid alcohol solution was used for chemical etching, the original austenite grain boundaries of the 18 Ni maraging steel samples could be clearly observed after solution and air cooling at 800-925 ℃. Moreover, the grain size grades could be evaluated accurately.

关 键 词：18NI马氏体时效钢 原始奥氏体晶界 显示方法 

分 类 号：TG142.24[一般工业技术—材料科学与工程]