熱軋無縫鋼管內(nèi)折缺陷分析
Analysis of Internal Fold of Hot-rolled Seamless Steel Pipe
-
摘要: 熱軋無縫鋼管的內(nèi)折缺陷一直是影響鋼管一次合格率和成材率指標(biāo)的主要原因之一。內(nèi)折缺陷主要在穿孔過程中產(chǎn)生,其產(chǎn)生的主要原因與連鑄管坯質(zhì)量(內(nèi)因)有關(guān),也與穿孔工藝制度(外因)合理與否有關(guān)。主要分析了穿孔工藝制度與內(nèi)折的關(guān)系,并提出了預(yù)防措施。Abstract: The defect of internal fold of the hot-rolled seamless steel pipe has been so far one of the major elements which negatively influences the first qualification rate and yield target of steel pipes. The said defect mainly occurs in the piercing process,and the main causes for it are related to both the quality of the continuously-cast billet (the internal cause) and the reasonability of the piercing schedule (the external cause). The analysis focuses on the relationship between the rolling process schedule and the said defect. Accordingly relevant preventative actions are proposed.
下載: