(北京科技大學(xué) 冶金與生態(tài)工程學(xué)院， 北京 100083)
摘 要: 在整個(gè)鋼生產(chǎn)過程中, 綜合考慮了鋼的冶金質(zhì)量控制和軋制工藝控制， 實(shí)現(xiàn)了低碳鋼晶粒細(xì)化和第二相析出綜合強(qiáng)化， 使普通成分的低碳鋼或不添加微合金元素V， Nb的低C-Mn鋼的屈服強(qiáng)度達(dá)到了400～500MPa， 開發(fā)了新一代低碳鋼——HSLC鋼。 介紹了HSLC鋼的力學(xué)性能及其冶金質(zhì)量控制，主要為HSLC鋼與HSLA鋼的力學(xué)性能對比； CSP條件下低碳鋼中碳的控制；電爐鋼低氮控制理論與控制技術(shù)； 夾雜物超細(xì)化—納米硫化物和氧化物固態(tài)析出的成分設(shè)計(jì)原則和控制技術(shù)以及鋼中鋁的作用與控制。并對低碳鋼中納米鐵碳化物的析出及其對鋼的強(qiáng)化作用、轉(zhuǎn)爐薄板坯連鑄連軋生產(chǎn)HSLC鋼以及HSLC鋼用于建筑鋼筋生產(chǎn)的可能性進(jìn)行了分析討論，指出HSLC鋼具有廣闊的發(fā)展前景。
關(guān)鍵字: 低碳高強(qiáng)度鋼； HSLC； 成分控制； 純潔度控制；析出強(qiáng)化； 綜合強(qiáng)化
（School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:The metallurgical quality control and rolling technology control of steel were considered comprehensively during the all production process, and the integrated strengthening of grain refinement and the second phase precipitation was realiged in low carbon steel which result in the yield strength of low carbon steel and low C-Mn steel without microalloy element V or Nb addition reach 400~500MPa. The new generation low carbon steel—high strength low carbon(HSLC) steel was developed in China. The mechanical properties and metallurgical quality control of HSLC steel including the mechanical property comparison between HSLC steel and HSLA steel, control of carbon content in low carbon steel produced by EAF-CSP technology, low nitrogen control theory and technology of EAF steel, ultra refinement of inclusions- the chemistry composition design principle and control technology of nano- scale sulfide and oxide precipitated in solid phase, effect and control of aluminum were introduced. The precipitation of nano- scale iron carbide in low carbon steel and its strengthening effect, the possibility of HSLC steel production using BOF-TSCR process and reinbar production using HSLC steel were analyzed and discussed. It was pointed out that the HSLC steel had a broad development prospects.
Key words: high strength low carbon steel; HSLC; chemistry composition control; cleanness control; precipitation strengthening;integrated strengthening
