JPS56163002A - Manufacture of steel coated with stainless steel - Google Patents

Abstract

PURPOSE:To mass-produce shapes coated with stainless steel, excellent in the corrosion resistance, at a low cost, by build-up welding a stainless steel, in a thickness adjusted in consideration of the metallic flow to be caused during the following rolling work, to the surface of a blank material of a steel shape, and by applying a hot rolling work to this blank material. CONSTITUTION:At build-up welding a stainless steel to the surface of a blank material of a steel shape, the thickness of the built-up-metal is made thicker at the parts corresponding to the inner face of flanges and the side faces of the web, wherein the increasing rate of surface area by the following hot rolling work is greater than the other parts. Or otherwise, before applying the build-up welding of the stainless steel, the shape of the blank material is preformed into nearly the product shape in order to almost uniformalize the metallic flow at various parts to be caused during the following hot rolling work. Thus prepared blank material is heated and is subjected to a hot rolling work according to the usual method, and hereby, a steel shape coated with stainless steel is formed. According to the present method, a steel shape excellent in the corrosion resistance, mechanical characteristics, etc., is easily manufactured.