摘要
针对目前无缝钢管采用外表面喷射与内表面轴向喷射的浸淬淬火方式,利用ANSYS软件对钢管浸淬温度场进行数值模拟。分析了部分浸入与全浸入淬火冷却各因素对温度场冷却均匀性的影响,这些因素包括喷射速度、钢管的旋转速度及部分浸入浸润角等。结果表明:部分浸入式淬火中,内外表面均不喷水,浸润角为180°~270°时,内外表面冷却较均匀且冷却速度较浸润角为0°~180°时快;外表面不喷射,内表面轴向喷射时,内喷速为3 m/s时,内外表面冷却较均匀;钢管的旋转速度应不低于60r·min-1时,钢管径向冷却均匀性较好。全浸入式淬火中,内喷速度为8 m/s,外喷速度为6 m/s和内喷速度为10 m/s,外喷速度为7 m/s时,内外表面冷却较均匀;钢管的旋转速度越大,内外表面的温度差波动越小,冷却均匀性越好,故钢管旋转速度应不低于60 r·min-1,但考虑到能耗及稳定性问题,钢管旋转速度则应不高于90 r·min-1。
Based on the immersion quenching of steel pipe used at present in cooling the outside surface by pipe jet and the inside surface by an axial jet,numerical simulation on temperature field of seamless steel pipe was carried out by the ANSYS software.The influence of factors such as jet velocity,rotation speed and wetting angle of the steel pipe on temperature field uniformity of the steel pipe in the process of partial immersion and total immersion quenching was analyzed.The results show that in partial immersion quenching a better temperature uniformity of the steel pipe surfaces and a higher cooling speed can be achieved with a wetting angle varying from 180° to 270°than that from 0° to 180° when no spraying is performed.When the inside surface is being cooled by an axial jet at the velocity 3 m /s while the outside surface is not,the better temperature uniformity can be gained.The radial cooling uniformity can be better when the rotation speed of the steel pipe is higher than 60 r·min- 1.In full immersion quenching,with the inner jet velocity 8 m /s while the outer jet velocity 6 m /s and the inner jet velocity 10 m /s while the outer velocity 7 m /s,the surfaces are both cooled in relatively better uniformity.The higher the rotation speed of the pipe is,the smaller the temperature difference between the inside and outside surfaces of the steel pipe would be.Considering the expenditure of energy and stability,the pipe rotation speed should be controlled in the range of60 r·min- 1to 90 r·min- 1.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第7期205-210,共6页
Transactions of Materials and Heat Treatment
基金
教育部新教师博士点基金项目(20100006120013)
关键词
钢管
浸淬
温度场
数值模拟
steel pipe
immersion quenching
temperature field
numerical simulation
