稀土对奥氏体焊缝金属晶间腐蚀敏感性的影响  

EFFECT OF RE ON INTERGRANULAR CORROSION RESISTANCE OF AUSTENITE WELD METAL

作　　者：张田宏[1] 张俊旭[1] 杜义[1] 彭冀湘[1] 

机构地区：[1]洛阳船舶材料研究所,洛阳471039

出　　处：《中国腐蚀与防护学报》2006年第5期299-302,共4页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用扫描电镜(SEM)和透射电镜(TEM)等分析技术研究了加入稀土前后1Cr19Ni23N焊条熔敷金属组织变化,讨论了稀土对奥氏体焊缝金属抗晶间腐蚀性能的影响.结果表明,稀土的存在改善了焊条熔敷金属组织,强烈影响碳化物的数量、形态和分布;与不加稀土时相比,焊缝中沿晶界析出碳化物的尺寸减小、数量减少、析出形态由网状析出变为不连续的颗粒状,抗晶间腐蚀能力得到提高.Variable microstructures of 1Cr19Ni23N electrode deposited metal were observed by scanning electron microscope and transmission electron microscope. The effect of RE on intergranular corrosion resistance of austenite deposited metal is discussed. The results showed that RE modified the microstructure of deposited metal, and it has strong effect on the quantity, morphology and distribution of carbides. Intergranular corrosion resistance was increased owing to the lessening of carbide particles formed at austenite grain boundaries and morphology changing from reticular to granular.

关 键 词：晶间腐蚀 碳化物 熔敷金属 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TG172[金属学及工艺—金属材料]