ժҪ Supermartensitic stainless steel (SMSS) is a new-style material has been introduced into the oil and gas industries to substitute more expensive duplex stainless steel for deep/ultra-deep well tubing applications. For improving mechanical properties of the certain chemical composition steel, a balance between strength and toughness must be achieved by controlling heat treatment. In this paper, the influence of tempering process on microstructure and mechanical properties of 00Cr13Ni4Mo SMSS was investigated. 600��C was chosen as the optimized tempering temperature from the quenching and different temperature tempering tests. The samples were kept at 600��C for 3h, 6h, 8h, 10h and 12h respectively, followed by air cooling. Scanning electron microscopy and X-ray diffraction examinations were conducted to analyze the microstructural evolutions. It revealed that the superior mechanical properties were achieved with 1040��C quenching (kept 0.5h +water cooling) and 600��C tempering (kept 3h +air cooling). Increasing isothermal tempering time could improve the toughness notably. It was considered that the property was correlated with the microstructure of tempered lath martensite and retained austenite. The more content of retained austenite, the higher toughness of the SMSS.
Zou De-ning;HAN Ying;ZHANG Wei;et al. Influence of Tempering Process on Mechanical Properties of 00Cr13Ni4Mo Supermartensitic Stainless Steel[J]. �й������ڿ���, 2010, 17(8): 50-54.
Zou De-ning;HAN Ying;ZHANG Wei;et al. . Chinese Journal of Iron and Steel, 2010, 17(8): 50-54.
2010, Vol. 17 
