S890 大直徑厚壁高強(qiáng)韌性液壓油缸用無縫鋼管的開發(fā)

Development of Large-sized and Heavy-walled S890 High Strength/Toughness Seamless Steel Tube for Hydraulic Cylinder Service

摘要: 介紹S890大直徑厚壁高強(qiáng)韌性液壓油缸用無縫鋼管的開發(fā)過程，并檢測成品管的性能，分析其顯微組織。研究結(jié)果表明：采用“電爐煉鋼+LF+VD+周期軋管機(jī)組軋制+調(diào)質(zhì)熱處理”工藝開發(fā)出的S890大直徑厚壁高強(qiáng)韌性液壓油缸管，其各項性能指標(biāo)均滿足用戶的設(shè)計要求，低溫沖擊韌性好，焊接性能優(yōu)良，可以批量生產(chǎn)。

Abstract: Elaborated here in the article is the development process of the large-sized and heavy-walled S890 high strength/toughness seamless steel tube for hydraulic cylinder service. The finished tube’s properties are tested,and its microstructure is analyzed. As a result,it is concluded that the said tube as developed with the“EF steel-melting+LF+VD+pilger mill rolling+quenching and tempering”process has all of its performance indexes up to the customer design requirements,including good low-temperature impact toughness and excellent weldability,being worth massive production.