高頻電阻焊K55鋼級套管的研發(fā)

Development of K55 Hi-frequency Electric Resistance Welded Casing

摘要: 簡述了國內(nèi)外K55鋼級套管的研究情況。根據(jù)寶山鋼鐵股份有限公司HFW生產(chǎn)線的特點,指出通過對焊管進行整管熱處理可以獲得目標力學(xué)性能,同時解決因成型技術(shù)導(dǎo)致的材料加工硬化的難題。研究參考了相變誘發(fā)塑性(TRIP)鋼種設(shè)計的思路,結(jié)合油田用戶的需求,采用兩相區(qū)淬火后高溫回火的整管熱處理工藝,實現(xiàn)了K55鋼級套管的工業(yè)化生產(chǎn)。

Abstract: Briefed in the paper are the current production situations of the K55 casing both at home and abroad.Based on the shaping characteristics of the Baosteel HFW production line,it is pointed out that with the process of heat-treatment over the entire length of the welded pipe,relevant mechanical property targets can be met,while the chronic technical problem of material work hardening during the shaping process as employed is tackled.With considerations of the design conception of TRIP(transformation induced plasticity)steel and the requirements of OCTG end-users,massive production of the K55 HFW casing is realized at Baosteel by using the heat treatment process of whole-length inter-critical quenching and elevated-temperature tempering.