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

钢铁研究学报(英文版), 2009, 16(1): 54-57.

^1, , ^2, , ^3, , ^4, , ^5,

1.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

2.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

3.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

4.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

5.Baoshan Iron and Steel Co Ltd,Shanghai 200940,China

基金项目: Shanghai Leading Academic Discipline Project(T0101) Science and Technology Commission of Shanghai Project(065211028)

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

GENG Hong-ming ^1, , WU Xiao-chun ^2, , WANG Hong-bin ^3, , MIN Yong-an ^4, , ZHANG Hong-kui ^5,

1.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

2.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

3.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

4.College of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

5.Baoshan Iron and Steel Co Ltd,Shanghai 200940,China

Keywords： machinability

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 4Cr13Cu 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%.

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