ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2014, Vol. 35 ›› Issue (5): 64-67.

• 组织和性能 • 上一篇    

超低碳马氏体时效不锈钢00Cr13Ni7Co5Mo4W的组织和性能

姜越,贾强,黎士强   

  1. 哈尔滨理工大学应用科学学院,哈尔滨 150080
  • 收稿日期:2014-05-05 出版日期:2014-10-01 发布日期:2022-09-01
  • 作者简介:姜越(1963-),男,博士,教授,1987年东北工学院毕业,特种合金的开发与应用研究。

Structure and Properties of Ultra-Low Carbon Maraging Steel 00Cr13Ni7Co5Mo4W

Jiang Yue , Jia Qiang , Li Shiqiang   

  1. College of Applied Science, Harbin University of Science and Technology, Harbin 150080
  • Received:2014-05-05 Published:2014-10-01 Online:2022-09-01

摘要: 试验用00Cr13Ni7Co5Mo4W钢(/%:0.007C,13.23Cr,7.02Ni,5.06Co,3.72Mo,0.96W)由50 kg真空感应炉熔炼,铸成10 kg锭,锻成55 mm×55 mm方坯并轧成3 mm×60 mm带材。利用热力学计算软件ThermoCalc分析该钢的析出行为,并采用金相显微镜、透射电镜和动电位极化法,研究了该钢的组织结构、力学性能和腐蚀性能。结果表明,R相是马氏体时效不锈钢在时效处理过程中的主要强化相;为获得细小、弥散的R相和良好的强韧性配合,确定最佳热处理工艺为1100℃固溶+490℃时效,钢的抗拉强度、屈服强度和伸长率分别为1 320MPa、1 450 MPa和10.8%;马氏体时效不锈钢00Cr13Ni7Co5Mo4W点蚀击穿电位为230 mV,人工海水中年平均腐蚀率为1.51μm/a,具有较好的耐腐蚀性能。

关键词: 马氏体时效不锈钢00Cr13Ni7Co5Mo4W, R强化相, 热力学计算, 力学性能, 极化曲线

Abstract: The test steel 00Cr13Ni7Co5Mo4W (/% : 0.007C, 13.23Cr, 7.02Ni, 5.06Co, 3.72Mo, 0.96W) is melted by a 50 kg vacuum induction furnace, cast to 10 kg ingot, forged to 55 mm x 55 mm billet and rolled to 3 mm x 60 mm strip. The precipitating behavior of the steel is analyzed by thermodynamic calculation software Thermo-Calc, and the structure, mechanical properties and corrosion performance of the steel are studied by optical, transmission electron microscope and potentiodynamic polarization method. Results show that R phase is main strengthening phase in the maraging stainless steel during aging process ; in order to get fine, dispersed R phase and better combination of strength-toughness of steel, the optimum heat treated process is defined that is solid-solution treating at 1100 ℃ + aging at 490 ℃ , and the tensile strength, yield strength and elongation of the steel are respectively 1450 MPa, 1320 MPa and 10.8% ; the breakdown potential and the annual corrosion rate in artificial sea water of maraging stainless steel 00Cr13Ni7CoMo4W are respectively 230 mV and 1.51 μm/a, it has better corrosion resistance.

Key words: Maraging Stainless Steel 00Cr13Ni7Co5Mo4W, R Strengthening Phase, Thermodynamic Calculation, Mechanical Property, Polarization Curve