728x90 반응형 SMALL high-frequency hardening1 High-Frequency Hardening High-frequency hardening is a method of hardening the surface layer of a metal material using high-frequency current. High-frequency current generates eddy currents on the surface of the metal material, and these eddy currents generate heat to heat the surface layer of the metal material. The heated surface layer of the metal material is hardened as it cools rapidly. High-frequency hardening has.. 2024. 1. 23. 이전 1 다음 반응형