Deformation behavior of 9Cr-3W-3Co martensitic heat-resistant steel  

作　　者：LUO Suzhen 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China

出　　处：《Baosteel Technical Research》2020年第4期24-32,共9页宝钢技术研究（英文版）

摘　　要：The deformation behavior of 9 Cr-3 W-3 Co heat-resistant steel at a high-temperature range of 1 060-1 260 ℃ and a strain rate of 0.3 s^(-1) was studied using a Gleeble 3800 heat-simulating test machine. The microstructure and precipitation phases of the steel at different temperatures were studied by optical microscopy,scanning electron microscopy,and transmission electron microscopy. The results show that due to its low melting point,coarse grain size,and the segregation of P,S,and Cu at the grain boundary,the thermoplasticity of 9 Cr-3 W-3 Co steel is poor at temperatures higher than 1 200 ℃.The bulk ferrite phase was the main factor affecting the thermoplasticity at 1 100-1 200 ℃.

关 键 词：heat-resistant martensitic steel 9Cr-3W-3Co hot deformation THERMOPLASTICITY 

分 类 号：TG142.73[一般工业技术—材料科学与工程]