摘要
80 t LD-LF-CC工艺生产齿轮钢20CrMnTi时,[Al]s从0.030%降至0.015%可使吨钢成本降低25.8元。为不影响钢水洁净度,转炉出钢严格挡渣,出钢加入2 kg/t钢芯铝,同时加入CaO≥70%、SiO_2≤5%的高碱度渣进行渣洗,吹氩喂铝线使[Al]s为0.015%。LF精炼加入石灰块和AD粉(Al+Al_2O_3)对炉渣改质,然后喂Ca-Si线,软吹氩≥10 min。5炉试验结果表明,改进工艺后铸坯具有较高的洁净度,T[O](14～15)×10^(-6),[S] 0.012%～0.015%,[P]0.012%～0.018%。
With gear steel 20CrMnTi producing by 80 t LD-LF-CC process, as [ Al] s decreases from 0. 030% to 0. 015% , the production cost per ton steel shall be decreased by 25.8 yuan. In order to un-influence the cleanliness of liquid steel, in LD tapping the slag was strictly stopped, the 2 kg/t steel-clad aluminium was added with adding high basicity slag containing ≥70% CaO and ≤5% SiO2 to carry out slag washing, argon blowing and feeding aluminium wire to [ Al] s 0. 015% , in LF refining, lime lump and AD powder （Al ＋ Al2O3 ） were added to modify slag ingredient, then feeding Ca- Si wire and soft-blowing argon for more than 10 min. Results by 5 heats test showed that with improved process, the cast billet had higher cleanliness with （ 14 - 15） × 10^-6T[ O ], 0. 012% - 0. 015% [ S] and 0. 012% - 0. 018% [ P].
出处
《特殊钢》
北大核心
2009年第3期25-27,共3页
Special Steel
基金
973新一代钢铁材料重大基础研究资助项目(2004C13619106)
