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本文研究了自来水和3.5％NaCl水溶液分别在全浸和干湿交替状态下对热轧双相钢疲劳性能的影响.结果表明:与空气中的疲劳寿命相比,腐蚀环境有不同程度的降低作用,并以喷雾盐水影响最大.在相同腐蚀条件下,环境的影响随应力幅的降低而增强.马氏体抗疲劳断裂的能力高于铁素体.试样表面和断口的观察结果发现,腐蚀疲劳裂纹萌生与腐蚀坑密切相关,蚀坑以阳极溶解方式形成.
In this paper, the effects of tap water and 3.5% NaCl aqueous solution on the fatigue properties of hot-rolled dual-phase steel under the conditions of full immersion and alternating wet and dry conditions were studied. The results showed that the corrosion environment had different degrees of reduction compared with the fatigue life in air , And sprayed with salt water has the greatest impact on the same corrosion conditions, the impact of the environment with the stress amplitude decreases and martensitic fatigue resistance higher than the ferrite.The surface of the specimen and the fracture results show that corrosion Fatigue crack initiation and corrosion pits are closely related, corrosion pits formed by anodic dissolution.