induction quenching
1.The strengthening layer of 2￣6mm with super fine tempering martensitic structure and high hardness (HRC>40) and high strength(σb>1200MPa)for the large hydraulic turbine blades made of ZG0Cr13Ni4Mo low-carbon martensitic stainless steel was obtained by using induction heating up to 1000℃,water quenching and tempering at 250℃.
