The prediction of the hardenability and chemical composition of gear steel was studied using artificial neural networks. A software was used to quantitatively forecast the hardenability by its chemical composition or ...The prediction of the hardenability and chemical composition of gear steel was studied using artificial neural networks. A software was used to quantitatively forecast the hardenability by its chemical composition or the chemical composition by its hardenability. The prediction result is more precise than that obtained from the traditional method based on the simple mathematical regression model.展开更多
攀钢采用120 t转炉-130 t LF+RH-280 mm×380 mm方坯连铸-热轧工艺生产Φ25～160 mm 20CrMnTiH齿轮钢(%:0.20～0.22C、0.25～0.31Si、0,93～1.00Mn、1.03～1.15Cr、0.05～0.08Ti)。检验结果表明,钢中氧含量(10～20)×10^(-6)(平...攀钢采用120 t转炉-130 t LF+RH-280 mm×380 mm方坯连铸-热轧工艺生产Φ25～160 mm 20CrMnTiH齿轮钢(%:0.20～0.22C、0.25～0.31Si、0,93～1.00Mn、1.03～1.15Cr、0.05～0.08Ti)。检验结果表明,钢中氧含量(10～20)×10^(-6)(平均14×10^(-6)),淬透性(J_9,J_(15))带宽△HRC值≤7,机械性能和组织均符合GB/ T5216-2004标准要求。展开更多
通过60 t LD→60 t LF→CC工艺生产20CrMnTiH齿轮钢的实践表明:转炉采用低拉增碳操作法,控制终点碳在0.05%～0.12%、温度控制在1640℃～1660℃、出钢下渣量控制小于30 mm、采用复合脱氧工艺;精炼采用Si-Al-Ca渣系,控制炉渣碱度R≥3.5,...通过60 t LD→60 t LF→CC工艺生产20CrMnTiH齿轮钢的实践表明:转炉采用低拉增碳操作法,控制终点碳在0.05%～0.12%、温度控制在1640℃～1660℃、出钢下渣量控制小于30 mm、采用复合脱氧工艺;精炼采用Si-Al-Ca渣系,控制炉渣碱度R≥3.5,合理控制精炼节奏及吹氩模式;连铸采用全保护浇铸等一系列措施,可把氧含量控制在18×10-6以下,满足了汽车齿轮行业标准的要求,实现了齿轮钢的批量生产。展开更多
文摘The prediction of the hardenability and chemical composition of gear steel was studied using artificial neural networks. A software was used to quantitatively forecast the hardenability by its chemical composition or the chemical composition by its hardenability. The prediction result is more precise than that obtained from the traditional method based on the simple mathematical regression model.
文摘攀钢采用120 t转炉-130 t LF+RH-280 mm×380 mm方坯连铸-热轧工艺生产Φ25～160 mm 20CrMnTiH齿轮钢(%:0.20～0.22C、0.25～0.31Si、0,93～1.00Mn、1.03～1.15Cr、0.05～0.08Ti)。检验结果表明,钢中氧含量(10～20)×10^(-6)(平均14×10^(-6)),淬透性(J_9,J_(15))带宽△HRC值≤7,机械性能和组织均符合GB/ T5216-2004标准要求。
文摘通过60 t LD→60 t LF→CC工艺生产20CrMnTiH齿轮钢的实践表明:转炉采用低拉增碳操作法,控制终点碳在0.05%～0.12%、温度控制在1640℃～1660℃、出钢下渣量控制小于30 mm、采用复合脱氧工艺;精炼采用Si-Al-Ca渣系,控制炉渣碱度R≥3.5,合理控制精炼节奏及吹氩模式;连铸采用全保护浇铸等一系列措施,可把氧含量控制在18×10-6以下,满足了汽车齿轮行业标准的要求,实现了齿轮钢的批量生产。
