论文部分内容阅读
常规线材轧机的能耗约650千瓦小时/吨,当小方坯的加热温度为1150℃时,加热的能耗占80％以上,降低加热温度可以节约大量的能量。关于能耗的理论研究和在生产规模进行的中碳钢轧制试验表明,在750℃轧制比常规轧制节约180千瓦小时/吨,试验过程不存在咬入问题,钢材性能完全符合瑞典标准。弹簧钢、轴承钢、工具钢和不锈钢的低温轧制结果表明,这些钢可以在800—950℃成功地进行轧制,节能为85—130千瓦小时/吨。钢锭和连铸坯的塑性不限制现有轧机的轧制温度,在瑞典山德维克公司、海姆斯丹兹冶金公司、乌德霍姆工具钢公司和佛斯柏格冶金公司进行的试验表明,降低温度轧制的限制是粗轧机架的负荷。一套小型轧机采用低温轧制每年生产20万吨线材和棒材多收入950万瑞典克朗,即每吨钢材节约43.2瑞典克朗,其中一部分效益是由于低温轧制减少氧化铁皮提高成材率取得的。
Conventional wire rod mill energy consumption of about 650 kilowatt hours / ton, when the billet heating temperature is 1150 ℃, the heating energy consumption accounted for more than 80%, reducing the heating temperature can save a lot of energy. Theoretical studies of energy consumption and medium-carbon steel rolling tests on production scale show that rolling at 180 ° C saves 180 kWh / t from conventional rolling without bite into the test and the steel performance is in full compliance with Swedish standards . The results of low temperature rolling of spring steel, bearing steel, tool steel and stainless steel show that these steels can be successfully rolled at 800-950 ° C with an energy saving of 85-130 kWh / t. The plasticity of ingots and slabs does not limit the rolling temperatures of existing rolling mills, tests carried out at Sandvik, Hemmingsdenz Metallurgical, Udhholm Tool Steel and Forsberg Metallurgical It shows that the limitation of reducing the temperature rolling is the load of the roughing stand. A small rolling mill uses low-temperature rolling to produce 200,000 tons of wire rods and rods per year and 9.5 million Swedish kronor, which saves SEK 43.2 per tonne of steel. Some of the benefits are due to the reduction of the scale and the improvement of finished products by low-temperature rolling.