公开(公告)号：US4859649A

公开(公告)日：1989-08-22

申请号：US162796

申请日：1988-02-26

申请人： Kurt Bohnke ,  Helmut Brandis ,  Hans-Heinrich Domalski ,  Hans-Joachim Fleischer ,  Heinrich Frinken

发明人： Kurt Bohnke ,  Helmut Brandis ,  Hans-Heinrich Domalski ,  Hans-Joachim Fleischer ,  Heinrich Frinken

IPC分类号： B01J23/86 ,  B01J27/185 ,  B01J32/00 ,  C09K5/00 ,  C09K5/16 ,  C22C38/00 ,  C22C38/28 ,  H01C3/00 ,  H05B3/12

CPC分类号： B01J23/862 ,  C22C38/28 ,  H05B3/12

摘要： A ferritic, heat-resistant steel whose behavior at high application temperatures is improved by the combined addition of oxygen affinitive elements. Apart from stabilizing the electric resistance of heating elements by addition of zirconium, titanium and rare earth metal, also the creep elongation of the steel is considerably reduced under load at temperatures above 900.degree. C., the thermal stress capacity thus being increased. The resulting complex oxide coating increases the protective function with regard to preserving the metallic cross-section in continuous and/or cyclic heat treatments.The steel is composed of:up to 0.10 % Cup to 0.80 % Si0.10 to 0.50 % Mnup to 0.035 % Pup to 0.020 % S12 to 30 % Cr0.10 to 1.0 % Moup to 1 % Ni3.5 to 8 % Al0.01 to 1 % Zr0.003 to 0.8 % rare earth metals0.003 to 0.30 % Ti0.003 to 0.050 % Nremainder Fe and incidental impurities.

摘要翻译： 一种铁素体耐热钢，其在高应用温度下的行为通过氧亲和元素的组合添加而得到改善。 除了通过添加锆，钛和稀土金属来稳定加热元件的电阻之外，在高于900℃的温度下，在负载下钢的蠕变伸长率也显着降低，因此热应力容量增加。 所得到的复合氧化物涂层增加了在连续和/或循环热处理中保留金属横截面的保护功能。 该钢由以下组成：高达0.10％C至0.80％Si 0.10至0.50％Mn至0.035％P至0.020％S 12至30％Cr 0.10至1.0％Mo至1％Ni 3.5至8％ Al 0.01〜1％Zr 0.003〜0.8％稀土金属0.003〜0.30％Ti 0.003〜0.050％N余量Fe及附带杂质。