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莱钢特殊钢厂采用 2 0t电弧炉 LF(喂丝 ) 3流 15 0mm× 15 0mm方坯连铸 热轧工艺生产Φ4 0mm2 0CrMnTiH齿轮钢材。冶炼成分控制为 (% ) :0 19～ 0 2 1C ,0 17～ 0 30Si,0 92～ 1 0 2Mn ,1 10～ 1 2 3Cr ,0 0 5～ 0 0 7Ti,0 0 15～ 0 0 35Al ,连铸钢水过热度 2 0～ 30℃ ,连铸速度 1.4～ 1.6m min ,二冷比水量 0 .5～ 0 .6L kg。根据 111炉检验结果统计分析可得 ,Φ4 0mm钢材疏松≤ 1.5级 ,偏析 0 .5级 ,J9(HRC) 30～ 4 0 ,J1 5(HRC) 2 2～ 35 ,满足标准要求
Laiwu Steel Special Steel using 20t EAF LF (wire feed) 3 flow 15 0mm × 15 0mm billet continuous casting hot rolling production Φ4 0mm2 0CrMnTiH gear steel. The smelting composition is controlled as follows: 0 19 ~ 0 2 1C, 0 17 ~ 0 30Si, 0 92 ~ 1 0 2Mn, 1 10 ~ 1 2 3Cr, 0 0 5 ~ 0 0 7Ti, 0 0 15 ~ 0 0 35Al , Continuous casting molten steel superheat 20 ~ 30 ℃, continuous casting speed of 1.4 ~ 1.6m min, second cooling than water 0.5 ~ 0.6L kg. According to the statistical analysis of 111 furnace test results, Φ4 0mm steel is loose ≤ 1.5, segregation is 0.5, J9 (HRC) 30 ~ 40, J1 5 (HRC) 22 ~ 35, meet the standard requirements