Characterization of Free Cutting Phase in Free Cutting Stainless Steel Containing High Copper
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%.
Key wordsmachinability copper-rich phase EBSD HREM
Unable to display preview. Download preview PDF.
- LI Bao. Improvement to the Thermo Plasticity of Free Cutting Stainless Steel Containing High Sulphur Amount [J]. Shanghai Metals, 2001, 23(3): 16 (in Chinese).Google Scholar
- Kosa T. Machining of Stainless Steels, Metals Handbook [M]. 9th ed. ASM International, 1989.Google Scholar
- WU Xiao-chun, CUI Kun. Analysis on Free Cutting Phases in Non Quenched and Tempered Die Steel for Plastic Moulding [J]. Journal of Iron and Steel Research, 1997, 9(6): 23 (in Chinese).Google Scholar
- LOU De-chun, CUI Kun, WU Xiao-chun. The Relationship Between Inclusion and Free-Cutting Mechanism of Resulphurized Composite Free Cutting Steel [J]. Materials for Mechanical Engineering, 1996, 20(5): 27 (in Chinese).Google Scholar
- YUE Li-jie, WANG Long-mei, XU Cheng-hai, et al. Cu-P Weather Resistance Steel: Influence of Rare Earths on Non-metallic Inclusions and Anticorrosivity [J]. Journal of Northeastern University, 2004, 25(12): 1179 (in Chinese).Google Scholar
- WANG Jian-min, CHEN Xue-qun, LI Guo-min, et al. Study of Pitting Sensitivity of Low-Alloy Hull Steel [J]. Journal of Naval University of Engineering, 2003, 15(5): 91 (in Chinese).Google Scholar