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我厂广大工人,革命干部和革命技术人员遵照伟大领袖毛主席的教导:“破除迷信,解放思想”,试制成功了稀土铁球墨铸铁东方红—30拖拉机曲轴。经过2000小时田间耐久试验,台架耐久及性能试验,证明质量符合要求。现将试验情况简介如下。1．熔化:用密筋炉腿酸性冲天炉进行熔炼。热风温度稳定在 280±20℃。铁水温度为1420±10℃(光学高温计测定未加校正)。用当地土焦。原铁水含硫量控制在0．04—0．05%。
Our factory majority of workers, revolutionary cadres and revolutionary technicians follow the teachings of Chairman Mao, the great leader: “to get rid of superstition and emancipate the mind”, successfully trial production of rare earth iron ductile iron Dongfanghong -30 tractor crankshaft. After 2000 hours of field durability test, bench durability and performance tests to prove the quality to meet the requirements. Now the test situation is as follows. 1. Melting: Smelting furnace with strong tendons acidic cupola furnace. Hot air temperature stabilized at 280 ± 20 ℃. Hot metal temperature of 1420 ± 10 ℃ (optical pyrometer without correction). Use local coke. The original molten iron sulfur content control in the 0.04-0.05%.