49MnVS3曲轴用非调质钢控轧控冷工艺技术研究及应用
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摘要
49MnVS3非调质钢(/%:0.47C,0.39Si,0.90Mn,0.016P,0.050S,0.22Cr,0.09V,0.015Ti,0.011Al,0.02Ni)的生产流程为铁水预处理-60 t顶底复吹转炉-LF处理-VD真空脱气-220 mm×300 mm坯连铸-控轧控冷。研究了控轧控冷工艺对49MnVS3非调质钢组织和性能的影响。φ110 mm轧材试验工艺参数:加热温度1 150～1 250℃、开轧温度1 0500℃、终轧温度850℃、轧后冷却速度70℃/min、冷却开始温度850℃和终止温度500℃。结果表明,试验炉次粒度提高高.5～1.0级,带状组织减轻轻0.5～1.5级,硬度、强度及塑韧性均有所提升,获得良好的强韧性匹配。
The production flowsheet of non-quenched and tempered steel 49 MnVS3(/%:0.47 C,0.39 Si,0.90 Mn,0.016 P,0.050 S,0.22 Cr,0.09 V,0.015 Ti,0.011 A1,0.02 Ni)is pretreated hot-metal-60 t top and bottom combined brown converter-LF-VD-220 mm x 300 mm bloom casting-contronled rolling and cooling,study the effect of contronled rolling and cooling process on microstructure and properties of non-quenched and tempered steel 49 MnVS3.Test parameters of Φ110 mm rolled products:heating temperature of 1 150～1 250℃,start rolling temperature 1 050 ℃ and finishing temperature850 ℃,70 ℃/min cooling speed after rolling,cooling start temperature of 850 ℃ and the end temperature 500 ℃.The results showed that the grain size of the test fuurace was improved by 0.5 ～1.0 and the banded structure was reduced by0.5～1.5,the hardness,strength and plasticity are improved,and a good match of strength and toughness is obtained.
The production flowsheet of non-quenched and tempered steel 49 MnVS3(/%:0.47 C,0.39 Si,0.90 Mn,0.016 P,0.050 S,0.22 Cr,0.09 V,0.015 Ti,0.011 A1,0.02 Ni)is pretreated hot-metal-60 t top and bottom combined brown converter-LF-VD-220 mm x 300 mm bloom casting-contronled rolling and cooling,study the effect of contronled rolling and cooling process on microstructure and properties of non-quenched and tempered steel 49 MnVS3.Test parameters of Φ110 mm rolled products:heating temperature of 1 150～1 250℃,start rolling temperature 1 050 ℃ and finishing temperature850 ℃,70 ℃/min cooling speed after rolling,cooling start temperature of 850 ℃ and the end temperature 500 ℃.The results showed that the grain size of the test fuurace was improved by 0.5 ～1.0 and the banded structure was reduced by0.5～1.5,the hardness,strength and plasticity are improved,and a good match of strength and toughness is obtained.
引文
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[2]倪洪启,刘湘华,王国栋,等.板带材控制冷却技术[J].金属成型工艺,2004(3):53-55.
[3]陈思联,惠卫军,邵成伟,等.控制冷却对中碳高钒非调质钢组织性能的影响[J].钢铁,2015,50(8):77-82.
[4]纪元,闵云峰,李鹏善,等.钢中带状组织及其研究现状[J].中国冶金.2016,26(4):1-9.
[5]王国栋.新一代TMCP技术的发展[J].轧钢,2012,29(1):1-8.
[6]胡磊,王磊,麻晗.高碳钢盘条的表面氧化与脱碳行为[J].钢铁研究学报,2016,28(3):67-73.