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以Cr25Ni5Mo2Cu3RE双相不锈钢为对象,采用金相显微镜、万能拉伸试验机、冲击试验机和恒电位仪分析测试手段,研究了Mn含量对Cr25Ni5Mo2Cu3RE双相不锈钢的显微组织、力学性能及腐蚀性能的影响规律。结果表明,奥氏体含量随Mn含量的增加先增多后减少,力学性能和耐电化学腐蚀性能随着Mn含量的增加先增大后降低;当Mn含量在0.6%～0.8%时,Cr25Ni5Mo2Cu3RE双相不锈钢的综合性能最好。
With Cr25Ni5Mo2Cu3RE duplex stainless steel as the object, the microstructure, mechanical properties and corrosion resistance of Cr25Ni5Mo2Cu3RE duplex stainless steel were investigated by metallographic microscope, universal tensile tester, impact tester and potentiostat. Affect the law. The results show that the content of austenite firstly increases and then decreases with the increase of Mn content. The mechanical properties and electrochemical corrosion resistance firstly increase and then decrease with the increase of Mn content. When the Mn content is 0.6% ~ 0.8%, the content of Cr25Ni5Mo2Cu3RE bis The best overall stainless steel performance.