APPARATUS AND METHOD FOR SURFACE TREATMENT

摘要

PROBLEM TO BE SOLVED: To improve the corrosion resistance and hardness of a steel material.SOLUTION: A surface treatment apparatus, in which a surface of a steel material is subjected to projection processing and a nitriding treatment by Cr particles, includes a gas cylinder 160 and a flow-rate valve/pressure-regulating valve 161 that introduce nitrogen gas into a chamber 110; a support 120 that is arranged in the chamber 110 and supports the steel material W; an induction heating coil 130 that is arranged around the support 120 and heats the steel material W; a high-frequency induction heating device 200 that supplies a high-frequency current to the induction heating coil 130 to induce and heat the steel material W; an injection nozzle 140 that injects the Cr particles toward the support 120; and a nitriding treatment part in which the projection-processing-completed steel material W is subjected to the nitriding treatment.