介绍了56Nb钢后，根据铁道接头夹板(鱼尾板)的性能要求并结合厂方的设备状况制定了56Nb钢鱼尾板材料的生产工艺：用8 t电弧炉冶炼，于1 570~1 580 ℃下铸成450 kg钢锭；将钢锭加热到1 250~1 270 ℃，经600系列2机架轧机5道次轧制后修整成185 mm×195 mm方坯；再将钢坯加热到1 050~1 150 ℃，由600系列轧机(2机架)共15道次轧制，用350系列(3机架)精轧机经3道次精轧成60 kg/m的鱼尾板材料，终轧温度约900 ℃。接着，入(70±10)℃水中淬火后带温于罩式炉内560 ℃回火2 h。经硬度、金相、拉伸、冷弯、冲击和SEM等测定及分析后，确认56Nb钢鱼尾板质量达到了TB/T234593《43~75 kg/m钢轨用鱼尾板供货技术要求》的规定，且其强韧性指标较平炉冶炼的56Nb钢有显著提高。
After introducing 56Nb steel, in order to meet performance requirement of 56Nb steel fish plate on the railroad rail, the production technique of 56Nb steel fish plate has been adopted under the factory equipment conditions: 450 kg steel ingot is prepared by melting in 8 t arc furnace and casting at 1 570-1 580 ℃ which is heated to 1 250-1 270 ℃, trimmed to 185 mm×195 mm bloom after rolling by 600 series 2stand rolling mill; then rolled 15 times by 600 series 2stand rolling mill when steel ingot is heated to 1 050-1 150 ℃, thereafter, steel ingot is rolled to 60 kg/m fish plate materials through 3 times by 350 series rolling mill, and the rolling temperature is about 900 ℃. Finally, it should be quenched in 70±10 ℃ water, tempered at 560 ℃ for 2 hours in a cap cover furnace. After examining hardness, tensile, cold bending, impact properties and analyzing metallurgical phase, the results show that the quality of 56Nb steel fish plate accords well with TB/T234593 《technical requirement of 43-75 kg/m fish plate for railroad rail》, and its toughness index is improved markedly compared to the one that is prepared by melting in open hearth furnace.
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