Microstructure and Hardness of 45 Steel Hammerhead Parts After Quenching
The surface of 45 steel hammerhead parts quenched generates the phenomena of different hardness because of the different thickness of parts and different shape of parts.The reasons of the phenomena were analyzed from the theory.The martensitic structure and grain size of the cooled parts were influenced by quencher of parts.Where parts surface shape change,namely thin place,the more of the martensite amounts,the higher of the hardness,the better of the wear resistance.