摘要
从腐蚀原理出发,对超超临界锅炉用P91/P92钢奥氏体晶界显示方法进行了探索研究。结果表明:采用过饱和苦味酸-十二烷基苯磺酸钠-双氧水溶液热化学浸蚀与10%(体积分数)硫酸溶液电解浸蚀相结合的浸蚀方法,可清晰显示P91/P92钢的原奥氏体晶界;P91/P92钢的马氏体晶粒度与实际奥氏体晶粒度评级结果一般相差2～4级;对于P91/P92钢应检测其实际奥氏体晶粒度。
Based on the corrosion principle,the austenite grain boundary display method of P91/P92 steels for ultra-supercritical boilers was studied.The results show that the original austenite grain boundary of P91/P92 steels can be clearly displayed by the combined etching method of chemical etching with hot supersaturated picric acid-sodium dodecyl benzene sulfonate-oxygen peroxide aqueous solution and electrolytic etching with 10%(volume fraction)sulfuric acid aqueous solution.The martensite grain size of P91/P92 steels is generally different from the actual austenite grain size by 2-4 grade.For P91/P92 steels,the actual austenite grain size should be tested.
作者
张学星
曾辉
ZHANG Xuexing;ZENG Hui(Thermal Power Technology Research Insitute,China Datang Corporation Science and Technology Research Institute,Beijing 100040,China;Dongfang Boiler Group Co.,Ltd.,Dongfang Electric Corporation,Zigong 643001,China)
出处
《理化检验（物理分册）》
CAS
2018年第12期891-893,896,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
