碳、铌对ASME S30432奥氏体耐热钢晶间腐蚀性能的影响  

Effect of Carbon and Niobium on Intergranular Corrosion of ASME S30432 Austenitic Heat Resistant Steel

作　　者：郭富强[1] 程世长[2] 刘正东[2] 包汉生[2] 张代明[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093 [2]钢铁研究总院,北京100081

出　　处：《机械工程材料》2007年第8期11-14,共4页Materials For Mechanical Engineering

摘　　要：研究了碳、铌含量对ASME S30432钢晶间腐蚀性能的影响。结果表明：当碳含量在0．058％～0．110％变化时，随碳含量增加该钢的晶间腐蚀敏感性增加，易发生晶界腐蚀；铌含量由0．30％增加到0．70％对抗晶间腐蚀性能有改善，含碳量对晶间腐蚀的影响比铌明显；铌含量与碳含量的比值至少在5．8以上才可能对晶间腐蚀有抑制作用。The influence of carbon content and niobium content on the intergranular corrosion of ASME S30432 austenitic heat resistant steel has been investigated. When the carbon content increases from 0. 058% to 0. 110%, the sensitivity of intergranular corrosion is improved, and intergranular corrosion easily happenes. Increase of niobium content from 0. 30% to 0. 70% benefites the intergranular corrosion resistance. Carbon content show much more effect on the intergranular corrosion than niobium content. When the ratio of niobium content to carbon content exceedes 5. 8 times, it could restrain intergranular corrosion.

关 键 词：S30432钢 晶间腐蚀 碳含量 铌含量 

分 类 号：TG142.73[一般工业技术—材料科学与工程]