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Development of a ferritic stainless steel with excellent heat resistance

机译：开发铁素体不锈钢，具有优异的耐热性

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摘要

To develop a high heat-resistant stainless steel for automotive exhaust manifolds, the influence of alloying elements on formability, high temperature strength and oxidation resistance of 15%Cr-1.6%Mo-Nb ferritic stainless steel were investigated. High temperature strength and oxidation resistance were increased by not only optimizing additional contents but also addition of 3%W. Manganese was effective in improving adhesion property of scale at elevated temperature. Based on these findings, 15%Cr-3%W-1.8%Mo-0.5%Nb-l%Mn steel has been developed. The newly developed steel has the same thermal fatigue property, fatigue strength at elevated temperature and oxidation property as those of 15%Cr-1.6%Mo-Nb steel, even if it goes up by 50 degrees C.
机译：为了开发用于汽车排气歧管的高耐热不锈钢，研究了合金元素对15％CR-1.6％Mo-Nb铁素体不锈钢的成形性，高温强度和抗氧化性的影响。通过不仅优化另外的含量，而且增加了3％w的高温强度和抗氧化性。锰可有效改善升高温度下刻度的粘附性。基于这些发现，已经开发了15％Cr-3％W-1.8％MO-0.5％NB-1％MN钢。新开发的钢具有相同的热疲劳性，升高温度和氧化性能的疲劳强度，为15％Cr-1.6％Mo-Nb钢，即使它上升50℃。

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