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CN101845603B 一种汽车排气系统高温端部件用铁素体不锈钢及制造方法 有权 转让

一种汽车排气系统高温端部件用铁素体不锈钢及制造方法
摘要：
一种汽车排气系统高温端部件用铁素体不锈钢及其制造方法，成份重量百分比为：C≤0.025％、Si：0.2～1.0％、Mn：0.2～0.80％、Cr：13.0～15.0％、P≤0.03％、S≤0.003％、Ni≤0.3％、Nb：6×(C+N)+0.20～0.60％、Ti：6×(C+N)～0.2％或10(C+N)≤Ti+0.5Nb≤0.60％、N≤0.015％、C+N≤0.03、W 0.5-2.0％、1.0≤Nb+W≤2.8、其余为Fe和不可避免的杂质元素，杂质元素总量低于0.05wt％。本发明采用了Nb+Ti双稳定化，不含Mo，添加W作为强化元素，提高材料的高温强度，高温稳定性和成型性能，满足汽车排气温度不断提高的要求。
摘要（英）：

The invention discloses ferrite stainless steel for a high temperature-end part of an exhaust system of an automobile and a manufacturing method thereof. The ferrite stainless steel comprises the following components in percentage by weight: less than or equal to 0.025 percent of C, 0.2 to 1.0 percent of Si, 0.2 to 0.80 percent of Mn, 13.0 to 15.0 percent of Cr, less than or equal to 0.03 percent of P, less than or equal to 0.003 percent of S, less than or equal to 0.3 percent of Ni, 6*(C+N)+0.20 to 0.60 percent of Nb, 6*(C+N) to 0.2 percent of Ti or Ti+0.5Nb more than or equal to 10(C+N) and less than or equal to 0.6 percent, 0.5 to 2.0 percent of W and the balance of Fe and inevitable impurity elements, wherein the N is less than or equal to 0.015 percent, C+N is less than or equal to 0.03, Nb+W is more than or equal to 0 and less than or equal to 2.8, and the total amount of the impurity elements is less than 0.05 weight percent. In the ferrite stainless steel, Nb and Ti dual-stabilization is adopted, Mo is not contained, the W is added to serve as a hardening element, the high-temperature strength, high-temperature stability and formability of the material are improved, and the requirement of increasingly improving exhaust temperature of the automobile is met.

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