超级13Cr钢管坯异常显微组织的一种金相显示方法  

A Metallographic Display Method for Abnormal Microstructure of Super 13Cr Steel Billet

作　　者：蔡煜 于少波 金传伟[2] 

机构地区：[1]江苏常宝普莱森钢管有限公司,常州213200 [2]南京工业大学材料科学与工程学院,南京211816

出　　处：《理化检验（物理分册）》2011年第8期499-501,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：在对超级13Cr钢管坯进行检验时,发现某批次管坯的显微组织存在异常,采用常规侵蚀剂无法清晰地显示其显微组织形貌。通过使用多种侵蚀剂交替侵蚀分析发现:采用王水酒精溶液、苦味酸盐酸酒精溶液和赤血盐氢氧化钾水溶液三种侵蚀剂交替侵蚀可以清晰地显示该批次超级13Cr钢管坯的显微组织;其中王水酒精溶液和苦味酸酒精溶液的侵蚀效果相似,都能很好地显示出该钢中的马氏体和块状铁素体组织,但不能很好地显示出该钢中的贝氏体组织,也不能确定出该钢中沿热加工方向的条状组织;而赤血盐氢氧化钾水溶液则能显示出该钢中除马氏体以外的其他组织,并且证实沿热加工方向的条状组织为δ-铁素体。Abnormal microstructure was found in a batch of super 13Cr steel billet when metallographic examination,and it was unable to display the microstructure clearly with conventional etchant.By eroding the steel with various etchants alternately,it was found that using three etchants named nitrohydrochloric acid-alcohol solution,picric acid-hydrochloric acid-alcohol solution and potassium ferricyanide-potassium hydroxide aqueous solution to erode alternately could display the abnormal microstructure clearly.Nitrohydrochloric acid-alcohol solution and picric acid-hydrochloric acid-alcohol solution had similar eroding effect,all could display the martensite and ferrite in the billet clearly,but could not display the bainite clearly and ensure the streaky microstructure in the hot work way.Potassium ferricyanide-potassium hydroxide aqueous solution could display other microstructures except martensite,and the streaky microstructure in the hot work way was confirmed to be δ-ferrite.

关 键 词：超级13Cr钢 侵蚀剂 异常显微组织 金相显示方法 

分 类 号：TG115.211.3[金属学及工艺—物理冶金]