Influence of Aging Time on Sigma Phase Precipitation in SAF2507 Super-Duplez Stainless Steel
Specimens of SAF2507 super-duplex stainless steel were heated at 920℃ with different aging time. The phase transformation and development of microstructure in the materials were investigated by color optical microscopy, scan electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The hardness was tested by HB-3000B hardness tester. The facts that sigma phase precipitated right after 2 rain. At 920℃, the grain boundaries to be the preferential precipitation sites and the sites changed from ferritic-austenitic phase interface into the inside of ferritic phase was found. Increase in aging time is proportional to the increase in sigma phase precipitation mass was most frequently observed in specimens. For phase precipitation, the values of hardness of the super-duplex stainless steel was enhanced evidently.
Super-Duplez Stainless Steel Heat treatment Precipitation Phase
Wei Zhang Dening Zou Guangwei Fan Jiao Li
School of Metallurgical Engineering, Xian University of Architecture and Technology Xian, 710055, School of Metallurgical Engineering, Xian University of Architecture and Technology Xian, 710055, Technology Center of Taiyuan Iron and Steel Group Co.Ltd, Taiyuan, 030003, China
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
355-358
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）