大直徑薄壁X60鋼級(jí)管線用無縫鋼管的開發(fā)

Development of X60 Large-sized Light-wall Seamless Steel Pipe for Pipe Line Service

摘要: 介紹了采用局部感應(yīng)加熱熱擴(kuò)工藝開發(fā)生產(chǎn)X60鋼級(jí)Φ406.4 mm×7.92 mm管線用無縫鋼管的工藝過程。通過檢測(cè)成品的幾何尺寸、機(jī)械性能以及金相組織分析，證明該產(chǎn)品尺寸符合標(biāo)準(zhǔn)要求，金相組織均勻，綜合性能達(dá)到API Spec 5L標(biāo)準(zhǔn)PSL2水平。熱擴(kuò)成型的同時(shí)進(jìn)行熱處理，消除了鋼管內(nèi)應(yīng)力，縮短了生產(chǎn)周期，降低了大直徑薄壁高鋼級(jí)管線用無縫鋼管的生產(chǎn)成本。

Abstract: Described in the article is the process flow of manufacturing the Φ406.4 mm×7.92 mm X60 seamless steel pipe for pipe line service with the locally-induction heating+hot-expanding process.With geometric dimensional inspection, mechanical property testing, and metallographic structure analysis of the finished product, it is verified that the product is of standard-required dimensions and homogeneous metallographic structure, and with comprehensive performance up to API Spec 5L PSL2.Thanks to the process of hot-expanding formation with simultaneous heat treatment, the inherent strain of the steel pipe is eliminated, and thus the production cycle is shortened, and in turn the operation costs for production of the high steel grade large-sized light-wall seamless steel pipe is reduced.