Effect of ECAP on the Microstructure and Mechanical Properties of 17-4PH Stainless Steel
Experiments were conducted to evaluate the influence of equal-channel angular pressing (ECAP) on the microstructure and mechanical properties of 174PH steel. The 17-4PH steel was solution-treated at 1040℃ for lh followed by oil cooling before ECAP process. Both the as solution-treated and ECAPed specimens were tempered at 460℃ and 610℃ for 2h, respectively. Tensile, impact and hardness properties as well as the microstructure and fracture mode were systematically studied. The results show that both the tensile strength and hardness are increased by ECAP process, the elongation is deceased but the Charpy V-notch energy absorption is increased by ECAP process when the tempering treatment is at a low temperature of 460℃, while the result is just reverse when the tempering temperature is 610℃. SEM observation reveals that the ECAP process promotes the precipitation of M23C6-type carbide obviously. The relations among ECAP process, microstructure, mechanical properties and fracture modes are discussed.
Gang Yang Fengshi Yin
Central Iron and Steel Research Institute of Beijing,100081 Beijing,China School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
879-884
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）