Characterization of Free Cutting Phase in Free Cutting Stainless Steel Containing High Copper  

作　　者：GENG Hong-ming WU Xiao-chun WANG Hong-bin MIN Yong-an ZHANG Hong-kui 

机构地区：[1]College of Materials Science and Engineering, Shanghai University, Shanghai 200072, China [2]Baoshan Iron and Steel Co Ltd, Shanghai 200940, China

出　　处：《Journal of Iron and Steel Research International》2009年第1期54-57,共4页

基　　金：Item Sponsored by Shanghai Leading Academic Discipline Project (T0101);Science and Technology Commission of Shanghai Project (065211028)

摘　　要：The machinability of 4Cr13 steel was improved obviously by adding Cu and S. The effect of copper addition on the machinability of 4Cr13 was similar to that of sulphur addition. By means of SEM, EBSD, and HREM, the distribution and size of the free cutting phase in the steel 4Crl3Cu were studied. The results showed that the free cutting phase was copper-rich phase. The copper-rich phases dispersed in the steel and were determined to have about 10 nm in diameter. The content of copper in the copper-rich phase was over 70%.The machinability of 4Cr13 steel was improved obviously by adding Cu and S. The effect of copper addition on the machinability of 4Cr13 was similar to that of sulphur addition. By means of SEM, EBSD, and HREM, the distribution and size of the free cutting phase in the steel 4Crl3Cu were studied. The results showed that the free cutting phase was copper-rich phase. The copper-rich phases dispersed in the steel and were determined to have about 10 nm in diameter. The content of copper in the copper-rich phase was over 70%.

关 键 词：MACHINABILITY copper-rich phase EBSD HREM 

分 类 号：TG142.71[一般工业技术—材料科学与工程] S828.5[金属学及工艺—金属材料]