Study on Heat Treatment Process of 5NiCrMoV Steel Forgings for Ships
According to the 120mm wall thickness forgings of 5NiCrMoV steel manufactured by electroslag remelting + forging,the mechanical properties and microstructure of the forgings were studied by using different tempering temperatures of 600℃,620℃,640℃and 660℃.The optimum heat treatment process for 5NiCrMoV steel forgings with 120 mm wall thickness is determined.The results show that the quenching temperature of 120 mm wall thickness forging is 875℃±5℃,and the tempering temperature is 620℃±5℃.After quenched-tempered heat treatment,the tempered martensite and granular bainite microstructure with uniform grains can be obtained.The mechanical properties of the surface and the core can meet the standard requirements,and the low temperature toughness margin is large,and the comprehensive performance is good.
5NiCrMoV steel120 mm wall thicknessforgingsheat treatment process
NETL
NSTL
万方数据
