特钢技术
特鋼技術
특강기술
SPECIAL STEEL TECHNOLOGY
2013年
4期
10-12,26
,共4页
球扁钢%弯曲变形%压下率%温度场
毬扁鋼%彎麯變形%壓下率%溫度場
구편강%만곡변형%압하솔%온도장
Bulb flat steel%Bending deformation%Reduction ratios%Temperature field
对球扁钢轧后冷却过程中产生弯曲变形的原因进行了分析，弯曲变形是轧制过程中不一致的压下率和冷却过程中不均匀的温度场相互作用的结果。球头的压下率比腹板小，将导致球扁钢产生弯向腹板方向的变形；腹板的冷却速度比球头快，将导致球扁钢产生弯向球头方向的变形。要根据球扁钢弯曲变形的实际表现形式，分析引起弯曲变形的主要决定因素，采取诸如调整轧制道次压下量分配、对球头进行快速冷却等针对性措施，控制和减小球扁钢的弯曲变形。
對毬扁鋼軋後冷卻過程中產生彎麯變形的原因進行瞭分析，彎麯變形是軋製過程中不一緻的壓下率和冷卻過程中不均勻的溫度場相互作用的結果。毬頭的壓下率比腹闆小，將導緻毬扁鋼產生彎嚮腹闆方嚮的變形；腹闆的冷卻速度比毬頭快，將導緻毬扁鋼產生彎嚮毬頭方嚮的變形。要根據毬扁鋼彎麯變形的實際錶現形式，分析引起彎麯變形的主要決定因素，採取諸如調整軋製道次壓下量分配、對毬頭進行快速冷卻等針對性措施，控製和減小毬扁鋼的彎麯變形。
대구편강알후냉각과정중산생만곡변형적원인진행료분석，만곡변형시알제과정중불일치적압하솔화냉각과정중불균균적온도장상호작용적결과。구두적압하솔비복판소，장도치구편강산생만향복판방향적변형；복판적냉각속도비구두쾌，장도치구편강산생만향구두방향적변형。요근거구편강만곡변형적실제표현형식，분석인기만곡변형적주요결정인소，채취제여조정알제도차압하량분배、대구두진행쾌속냉각등침대성조시，공제화감소구편강적만곡변형。
The causes of bending deformation of bulb flat steel during cooling process after hot rolling were analyzed. Bending deformation was the results of both inconsistent reduction ratios during rolling process and un-even temperature filed during cooling process. The reduction ratio of bulb head was smaller than flat, and this would lead to bending deformation towards flat. The cooling speed of flat was faster than bulb head, and this would lead to bending deformation towards blub head. The dominant cause of bending deformation should be ana-lyzed according to the actual bending form of bulb flat steel. Countermeasures should be taken to control and re-duce the bending deformation, such as adjust the reduction ratio distribution in rolling process or rapid cooling of ball head in cooling process.
