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Effects of Finish Rolling Temperature on Microstructure and Mechanical Properties of FerriticRolled PAdded High Strength InterstitialFree Steel Sheets

GUO Weimin , WANG Zuocheng , LIU Sheng , WANG Xiebin

The steels were rolled at 3 different finishing temperatures. The mechanical properties were tested by tensile tests. The results show that as finish rolling temperature decreases from 620 to 560 ℃ in ferrite region, the deep drawability of ferriticrolled Padded high strength IF steels is improved, and r value rises from 114 to 137. Finish rolling temperature (FT) has less influence on other mechanical properties, such as yield strength, tensile strength and elongation. Microstructures of hot rolled and annealed steel sheets and precipitates of annealed steel sheets were also analyzed.

关键词: ferrite , high strength IF steel , deep drawability , rvalue

439不锈钢析出行为对耐冷凝液腐蚀性能的影响

陈超 , 路晓晖 , 郑越 , 尚成嘉 , 肖纪美

钢铁研究学报

利用OM、SEM、EM和EDS研究了单钛稳定439不锈钢和Nb-Ti双稳定439不锈钢的析出行为对耐冷凝液腐蚀性能的影响，确定了两种钢中各种析出物的大小、成分、显微结构以及取向关系。对两种钢分别进行了5个周期、10个周期和20个周期的冷凝液腐蚀评价试验，并使用极值分析方法对冷凝液腐蚀试验后样品的最大点蚀深度进行了统计分析。结果表明，双稳定 439不锈钢的预测寿命要比单稳定439不锈钢略高。另外，通过对两种钢表面钝化膜化学稳定性的研究，讨论了不同的析出行为对两种不锈钢点腐蚀影响的机制。

关键词: 铁素体 , stainless steel , automotive exhaust system , condensate , pitting

材料期刊网

Effects of Finish Rolling Temperature on Microstructure and Mechanical Properties of FerriticRolled PAdded High Strength InterstitialFree Steel Sheets

439不锈钢析出行为对耐冷凝液腐蚀性能的影响

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