直縫焊管生產(chǎn)工藝對X65M鋼級鋼材屈服強(qiáng)度的影響
Influence of SAWL Process on Yield Strength of X65M Steel
-
摘要: 以某X65M鋼級鋼板為例，分析了直縫焊管生產(chǎn)工藝對該材質(zhì)焊管最終屈服強(qiáng)度的影響。分析認(rèn)為：成型工藝對X65M鋼級鋼板的屈服強(qiáng)度影響較大，成型后母材屈服強(qiáng)度減小30～70 MPa；擴(kuò)徑雖能使屈服強(qiáng)度增加，但增幅不大，不足以彌補(bǔ)成型后造成的屈服強(qiáng)度損失；棒狀試樣的屈服強(qiáng)度普遍比板狀試樣的大，但增量不大。建議鋼管生產(chǎn)廠對原料的理化性能及金相組織進(jìn)行充分評估，預(yù)測屈服強(qiáng)度變化趨勢，避免成品鋼管的屈服強(qiáng)度超出標(biāo)準(zhǔn)要求。Abstract: Analyzed in the paper，taking a certain type of X65M steel plate as an example，is the influence of the SAWL process on the final yield strength of the weld tube.The analysis leads to the following conclusion.The formation process has strong influence on the yield strength of the X65M steel plate，so the yield strength of the base metal after formation will decrease by 30～70 MPa.And although the expanding process may increase the yield strength，the increasement is not good enough to make up for the loss of yield strength resulting from formation. Moreover，the yield strengths of the rod specimens are generally higher than the plate specimens，but the differences are not big.It is suggested that the tube manufacturers carry out sufficient evaluations on the physicochemical property and metallographic structure of the raw material and predict the changing trend of the yield strength，so as to prevent the yield strength of the final tube from going beyond the requirements of applicable standard.
下載: