我厂生产的30CrMnMoTiA 钢批量锻件,单件重0.8kg,退火后要求布氏硬度 d=3.9～4.4,金相组织为细块状铁素体加片状珠光体。原用箱式电炉退火,每炉装400件,生产周期需30～34小时,后来采用连续退火工艺,三年来工艺稳定,质量达到技术要求,劳动生产率提高近30倍,热处理工艺成本每吨减少80元。现已扩大用于11种锻件的退火。 I produced 30CrMnMoTiA steel batch forgings, single weight 0.8kg, after annealing Brinell hardness d = 3.9 ~ 4.4, the microstructure of fine ferrite and lamellar pearlite. The original box-type electric furnace annealing, 400 per furnace, the production cycle takes 30 to 34 hours, and later the continuous annealing process, the process of three years of stability, quality to meet the technical requirements, labor productivity increased nearly 30 times, heat treatment costs per ton of reduction 80 yuan. Has now been expanded for annealing of 11 kinds of forgings.