20CrMnTi钢球化退火工艺优化  

Optimization of spheroidization annealing process for 20CrMnTi steel

作　　者：谢红委 李伟涛 马致遥 刘建垒 姜传辉 Xie Hongwei;Li Weitao;Ma Zhiyao;Liu Jianlei;Jiang Chuanhui(Weifang Special Steel Group Co.,Ltd.,Weifang 261000,China)

机构地区：[1]潍坊特钢集团有限公司,山东潍坊261000

出　　处：《金属制品》2024年第2期29-30,62,共3页Metal Products

摘　　要：对比分析两种退火工艺下材料的组织和性能,获得最佳球化退火工艺参数。将试样随炉加热至715℃后以20℃/h速度升温至760℃保温7 h。随炉冷却至720℃保温5 h,再以20℃/h速度降至500℃,然后自然冷却,球化级别达到4级,碳化物75%为球状或点状,布氏硬度136 HBW,满足客户使用要求。还需优化材料的塑性、硬度及强度指标,优化保温时间和保温温度,以降低能耗,改善冷挤压效果。Comparative analysis materials microstructure and properties under two annealing processes to obtain the optimal parameters for spheroidizing annealing process.Heat sample in furnace to 715℃and then heat it up to 760℃at speed of 20℃/h holding 7 hours.Cool down to 720℃and holding 5 hours in furnace,then reduce to 500℃at speed of 20℃/h.Then naturally cool down.Spheroidization level reaches level 4,and 75%of carbides are spherical or punctate.Brinell hardness is 136 HBW,which meets requirements of customers.It is necessary to optimize plasticity,hardness,and strength indicators of materials,optimize insulation time and temperature,in order to reduce energy consumption and improve cold extrusion effect.

关 键 词：20CrMnTi 球化退火 冷加工 布氏硬度 碳化物 

分 类 号：TG156.2[金属学及工艺—热处理]