To provide a coated heat-treated steel product having adequate corrosion resistance after the coating as a member for car even when executing the heat treatment of heating at least a part of the steel product having a plating film on at least one side thereof to a hardenable temperature region, and cooling the steel product thereafter, and capable of suppressing generation of scales associated with the heat treatment, and further, having excellent weldability and decorativeness.
The coated heat-treated steel product is subjected to the heat treatment, in which at least a part of steel product having a Ni plating film, a Cr plating film, a Cu plating film, a Co plating film, or an alloy plating film containing ≥50% in total of two or more kinds selected among a group composed of Ni, Cr, Cu and Co which is coated on at least one surface thereof, is heated in the hardenable temperature region. At least a part of the portion subjected to the heat treatment has a film in which the combination of one or two or more kinds selected among the group consisting of Ni, Cr, Cu and Co is alloyed. The film is corrosion-resistant, and capable of ensuring the lubrication function at high temperature, and has the excellent weldability and decorativeness.
| JPS59143089 | TREATMENT OF TINNED SURFACE |
| JPH0570994 | PRODUCTION OF TIN PLATED TERMINAL |
| JPH01219152 | INDUCTION HEATING FURNACE FOR PLATED STEEL SHEET |
TOMIZAWA ATSUSHI
IMAI KAZUHITO
SHIMADA NAOAKI
