Production of chrome plating steel sheet with excellent weldability

TLDR: In this paper, the authors proposed a method to obtain a chrome plating steel sheet with excellent weldability by carrying out temper rolling of less than 20% to the steel plate, where the screwdown rate of the tempering and the plating specification of the steel sheet are retatined within the proper range.

Abstract: PURPOSE: To obtain chrome plating steel sheet with excellent weldability by carrying out temper rolling of less than 20% to chrome plating steel plate. CONSTITUTION: In case temper rolling is carried out to the chrome plating steel sheet, and its surface is made to crack, a welding current flows to the base iron part through those innumerable cracks, and it is possible to perform good Soudronic welding, etc. On the other hand, other quality and performance are lowered by the aforesaid refining rolling, but so far as the screw-down rate of the temper rolling and the plating specification of chrome plating steel sheet are retatined within the proper range, the aforesaid deterioration can be disregarded as a matter of fact. Namely, as for the metallic chromium quantity of chrome plating steel sheet, 3W 150mg/m 2 are desirable, while as for the chromium oxide quantity, 2W30mg/m 2 are desirable as metallic chromium conversion value. Also, the suitable temper rolling rate is less than 20%, and preferably less than 5%. COPYRIGHT: (C)1980,JPO&Japio