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采(火乚)机齿轮属于重载齿轮,要求齿轮齿部具有高的接触疲劳强度、弯曲疲劳强度、表面耐磨和心部有一定的韧性。为了满足这些要求,过去国内外采用合金渗碳钢制造,如20CrMaTi,20CrMnMo,30CrMnTi,12CrNi3A。以 MLQ—80型采(火乚)机为例,仅其牵引部和切割部分每台就有20多种齿轮,齿轮模数为8～14毫米,每台需要齿轮钢2.5吨左右,年产300台,共需合金钢800吨左右。低淬钢70DTi 立足于国内资源,它与合金渗碳钢比,成本低、性能好,不要渗碳,直接经高、中频、或盐炉、箱式电炉加热淬火处理,生产周期短。我厂于1973年开始对低淬钢
Mining (fire 乚) gear belongs to heavy gear, requiring gear teeth with high contact fatigue strength, bending fatigue strength, surface wear and the heart has a certain degree of toughness. In order to meet these requirements, the past, at home and abroad using alloy carburized steel manufacturing, such as 20CrMaTi, 20CrMnMo, 30CrMnTi, 12CrNi3A. Take MLQ-80 mining (fire 乚) machine as an example, only its traction and cutting parts each have more than 20 kinds of gear, gear modulus of 8 to 14 mm, each need 2.5 tons of gear steel, with an annual output 300 Taiwan, a total of about 800 tons of alloy steel. Low-quenched steel 70DTi based on domestic resources, it is compared with alloy carburizing steel, low cost, good performance, not carburizing, direct high, medium frequency, or salt furnace, box-type electric furnace heating quenching, short production cycle. I plant started in 1973 on the low-quenched steel