HFW鋼管直線度的影響因素及解決措施

Influencing Factors for Straightness of HFW Steel Pipe and Relevant Preventative Actions

摘要: 介紹了直線度對于保證HFW鋼管質量的意義, 分析了影響HFW鋼管直線度常見原因(矯直機架調整不當、卷板各處強度不均勻、鋼管上下表面溫度不均和定徑量不足)及其造成鋼管彎曲的機理, 并提出相應的解決措施。分析認為:通過改造冷卻裝置, 增加對卷板強度均勻性的要求, 保證定徑機組足夠定徑量等, 可從根本上消除造成彎曲的原因, 保證HFW鋼管的直線度

Abstract: The importance of straightness for ensuring quality of the HFW steel pipe is explained,and the common causes as responsible for the pipe’s straightness are analyzed, including improper setting of the straightener stand,inhomogeneous strength distribution of the coil,uneven temperatures on top and bottom surfaces of the pipe, and insufficient sizing amount,etc. And how such factors lead to bending of the pipe is revealed. Accordingly,preventative actions are put forward. Finally,it is concluded that the said influencing factors could be thoroughly eliminated, and desired straightness of the HFW steel pipe ensured by means of improving the cooling system,adding requirement for strength homogeniety of the coil,and assurance of sufficient sizing amount of the sizing mill,etc.