摘要
对3种用于薄钢板冷却的气体射流控冷结构进行了数值模拟分析,通过比较气体射流控冷结构内风速流场和钢板温度场,确定单均风板气体射流控冷结构可满足薄钢板淬火要求,且冷却均匀性较好,并进行了试验验证。结果表明:与无均风板相比,设置一个或两个均风板时,工件近壁面风速流场与温度场均匀性得到提高,利用单均风板气体射流控冷结构对钢板进行风冷时,在20 s时工件上存在的最大温度差约为63.8℃。在20 s内钢板平均温度从920℃冷却至Ms点(412℃)以下,最低冷速约为27.2℃/s,大于马氏体转变临界冷却速度27℃/s,表明单均风板气体射流控冷结构可用于薄钢板气体射流淬火工艺。
Three kinds of air-jet cooling control structure used for thin steel sheet cooling were simulated and analyzed.By comparing the velocity field and steel sheet temperature field in the air-jet cooling structure,it is determined and experimentally verified that the air-jet cooling control structure with single perforated plate can meet the requirements of steel sheet quenching and can obtain good cooling uniformity.The results show that the uniformity of velocity field and temperature field near the workpiece surface is improved when one or two perforated plates are set up compared with that without perforated plate.When the air-jet cooling control structure with single perforated plate is used to cooling the steel sheet,the maximum temperature difference on the workpiece is about 63.8℃in 20 s.In 20 s,the average temperature of steel sheet is cooled from 920℃to below Ms point(412℃),and the lowest cooling rate is about 27.2℃/s,which is greater than the critical cooling rate of martensitic transformation(27℃/s),that is,the air-jet cooling control structure with single perforated plate can be used for air-jet quenching of steel sheet.
作者
董承智
梁校
李贤君
杨涛
侯俊卿
罗平
Dong Chengzhi;Liang Xiao;Li Xianjun;Yang Tao;Hou Junqing;Luo Ping(Beijing Research Institute of Mechanical&Electrical Technology Ltd.,Beijing 100083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第6期239-243,共5页
Heat Treatment of Metals
基金
国家重大科技专项(2018ZX04023002)。
关键词
数值模拟
气体射流淬火
薄钢板冷却
速度场
温度场
numerical simulation
air-jet quenching
steel sheet cooling
velocity field
temperature field
