优化大直径无缝钢管倍尺数提高成材率  

Improvement on Yield of Large-sized Seamless Steel Tube by Optimizing Multiple-length Range

作　　者：林震[1] 温博[1] 陈圣明[1] 丛钢军 LIN Zhen;WEN Bo;CHEN Shengming;CONG Gangjun(Steel Pipe Co,Inner Mongolia Baotou Steel Union Co.Ltd,Baotou 014010,China)

机构地区：[1]内蒙古包钢钢联股份有限公司钢管公司,内蒙古包头014010

出　　处：《钢管》2020年第1期43-46,共4页Steel Pipe

摘　　要：介绍提高无缝钢管成材率的措施,针对切损率高的情况制定改进方案,即将二倍尺钢管长度优化为三倍尺,并用典型规格进行试验。分析认为:增加各工序钢管轧制长度,薄壁管长度由二倍尺优化为三倍尺,在切头尾长度相同的情况下,切损率可降低0.5%左右,成材率提高0.5%;增加倍尺后,同规格坯料长度增加,在轧制节奏相同的条件下,产量提高。通过优化倍尺数,每年可降低成本200万元以上,提高产量7万t。Described in the essay are the actions as taken to improve the yield of the seamless steel tube.Addressing the problem of high cropping rate of the tube,relevant improvement proposal is worked out,ie,optimizing the multiple range from the original double-length to triple-length.And a trial is made with some representative pipe sizes.The analysis reveals that given that pipe head/tail crop length remain the same,the cropping loss rate will be reduced by about 0.5%,and the yield increased by 0.5%owing to increasing the length of the pipe as rolled with each individual operation step,and changing the multiple length range of the light-wall pipe from the original double-length to the triple-length.As the multiple-length range is increased,the pipe blank length with the same size is increased,and thus with the same rollingcycle,the output is increased accordingly.Thanks to optimization of the multiple-length range,the annual operation cost will be cut down by at least 2 million RMB,while the output will be increased by 70000 tons.

关 键 词：无缝钢管 大直径 成材率 PQF连轧管机 成品管倍尺 切损率 

分 类 号：TG335.71[金属学及工艺—金属压力加工]