固溶温度与冷变形量对S32750双相不锈钢管低温冲击性能的影响  

Effect of solution temperature and cold deformation on microstructure and low temperature impact properties of S32750 duplex stainless steel tube

作　　者：王曼 沈强 罗有心 佴启亮 王宝顺 吴明华 朱雄明 Wang Man;Shen Qiang;Luo Youxin;Nai Qiliang;Wang Baoshun;Wu Minghua;Zhu Xiongming(Zhejiang Jiuli High-Technology Metals Co.,Ltd.,Huzhou Zhejiang 313028,China;Engineering Research Center of High Performance Nuclear Power Pipe Forming of Zhejiang Province,Huzhou Zhejiang 313028,China;School of Engineering,Huzhou University,Huzhou Zhejiang 313000,China;Zhejiang Yongxing Special Materials Technology Co.,Ltd.,Huzhou Zhejiang 313005,China;Huzhou Jiuli Yongxing High Performance Metals Co.,Ltd.,Huzhou Zhejiang 313005,China)

机构地区：[1]浙江久立特材科技股份有限公司,浙江湖州313028 [2]浙江省核电用高性能管材成形工程技术研究中心,浙江湖州313028 [3]湖州师范学院工学院,浙江湖州313000 [4]浙江永兴特种材料科技股份有限公司,浙江湖州313005 [5]湖州久立永兴特种合金材料有限公司,浙江湖州313005

出　　处：《金属热处理》2022年第1期233-238,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2016YFB0300201);浙江省重点研发计划(2020C01007);湖州市科技计划(2021GZ03)。

摘　　要：通过金相显微镜、扫描电镜及冲击试验对S32750双相不锈钢管的显微组织和冲击吸收能量进行研究,分析了固溶温度和冷变形量对S32750不锈钢管低温冲击吸收能量和显微组织的影响。结果表明:随着冷变形量从30%逐渐增加到60%,γ相的圆度系数从7.10增加到27.25,低温冲击吸收能量逐渐增加,特别是-46℃冲击吸收能量增加约2倍,冲击断口形貌发生变化。随着热处理温度从1060℃升高到1120℃,γ相比例减少,低温冲击吸收能量降低,特别是-40℃冲击吸收能量值降低53.4%。Microstructure and impact absorbed energy of the S32750 duplex stainless steel tube were studied by means of metallographic microscope, scanning electron microscope and impact test. The effect of solution temperature and cold deformation on the low-temperature impact absorbed energy and microstructure of the S32750 stainless steel tube was analyzed. The results show that the roundness coefficient of γ phase increases from 7.10 to 27.25 with the increase of cold deformation from 30% to 60%, and the impact absorbed energy at low temperature gradually increases, especially which at-46 ℃ increases by about 2 times, together with the change of the impact fracture morphology. The proportion of γ phase decreases with the increase of heat treatment temperature from 1060 ℃ to 1120 ℃, and the impact absorbed energy at low temperature decreases, especially which at-40 ℃ decreases by 53.4%.

关 键 词：固溶温度 应变 低温冲击吸收能量 S32750双相不锈钢 

分 类 号：TG335.71[金属学及工艺—金属压力加工]