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鉴于双相钢薄板在使用中厚度减薄和腐蚀破坏间的矛盾,本文介绍了一种采用与生产实际十分接近的台阶淬火(950℃奥氏体化后,预冷至α+γ双相区然后淬火)工艺的耐大气腐蚀0.08C-Cu-P-Cr-Ni-Mo双相钢。研究了这种双相钢的显微组织对力学性能和腐蚀特性的影响;测定了不同马氏体区体积分量时双相钢的各种电化学参数及在模拟外海各种腐蚀环境中的腐蚀数据。实验结果表明,这种双相钢在具有较其正火态更为优异的力学性能的同时,保持了与正火钢相近的耐蚀性能,可为开发与应用耐大气腐蚀双相钢提供参考数据。
In view of the contradiction between the thickness reduction and the corrosion damage of dual-phase steel sheet, a method of using the step quenching (950 ° C austenitizing and pre-cooling to the α + γ dual phase region Then quenched) process resistant to atmospheric corrosion 0.08C-Cu-P-Cr-Ni-Mo duplex steel. The effects of microstructure on the mechanical properties and corrosion properties of the dual-phase steel were studied. The electrochemical parameters of the dual-phase steels and the corrosion in simulated corrosive environments data. The experimental results show that the dual phase steel maintains the similar corrosion resistance to normalized steel while having more excellent mechanical properties than the normalized steel, which can provide a reference for the development and application of dual-phase steel resistant to atmospheric corrosion data.