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一、当前的情况m=10、z=75、齿宽=140毫米、外径达777.5毫米的45CrNi钢牵引大齿轮目前已利用真空管式ЛТ3—60型(或国产260型)高频设备以不带导磁体的单齿连续加热感应器采用“自冷”的淬火方式进行了沿齿轮廓表面热处理,其齿根淬硬层深度在1.9毫米以上,平均在2.2毫米,而高频淬火后的变形在公差范围之内,从而省去了磨齿工序,降低了成本,提高了寿命,缩短了生产周期。根据1964年小批生
First, the current situation m = 10, z = 75, tooth width = 140 mm, outer diameter of 777.5 mm 45CrNi steel traction gear has been used vacuum tube type ЛТ3-60 (or domestic 260 type) high-frequency equipment to not The single-tooth continuous heating inductor with conducting magnet adopts “self-cooling” quenching way to heat treatment along the gear profile surface. The root hardened depth is more than 1.9mm with an average of 2.2mm. After induction hardening Of the deformation within the tolerance, eliminating the grinding process, reducing costs, improve life expectancy and shorten the production cycle. According to the 1964 small batch