Turn. Peuriyi. Frosty day (tin free steel) and welded cans recipe

摘要

A process for the preparation of welded cans comprises forming a blank into a cylinder and passing a lap portion of the formed cylinder between a pair of electrode rollers, through an electrode wire, to effect electric resistance welding. The blank is a tin-free steel blank comprising a steel-plate substrate, a layer of metallic chromium formed on the surface of the steel plate substrate and a layer of chromium oxide formed on the metallic chromium layer. Electric resistance welding is carried out in an inert atmosphere in the state where an electrode wire, having a plated layer of a soft metal selected from the group consisting of tin and alloys thereof the thickness of said plated layer being 0.1 to 20 m, is kept in close contact with the chromium oxide layer of the tin-free steel blank.