论文部分内容阅读
钢制的各种机械零件热处理时,特别在淬火过程中会产生变形,因此如何减少变形,对保证零件质量具有重要意义。现将生产实践中摸索出的轴和轴套类零件热处理变形规律介绍于后,供参考。轴类零件的热处理变形 45钢零件水淬后轴上键槽会缩小;水淬油冷,轴上键槽缩小较少;油淬后,轴上键槽涨大;硝盐(50％KNO_3+50％NaNO_2+1.5％H_2O,下同)冷却后,轴上键槽略涨大。 40Cr钢零件水淬后轴上键槽缩小;油淬后,轴上键槽涨大;淬入180℃硝盐中冷却,键槽涨大;淬入150℃硝盐中冷却,轴上键槽略涨大;淬入120℃硝盐
When various mechanical parts of steel are heat-treated, deformation occurs especially during quenching process. Therefore, how to reduce the deformation is of great significance for ensuring the quality of parts. Now the production practice to explore the shaft and sleeve parts of the heat treatment deformation law introduced later, for reference. Shaft parts of the heat treatment deformation of 45 steel parts after water quenching shaft keyway will be reduced; water quenching oil, the shaft keyway to reduce less; oil quenching, shaft keyway up; nitrate (50% KNO 3 + 50% NaNO 2 + 1.5% H_2O, the same below) After cooling, the shaft keyway rose slightly. 40Cr steel parts after quenching the shaft on the keyway narrowing; oil quenching, shaft keyway up; quenched into the nitrate salt 180 ℃, the keyway up; quenched into the nitrate salt at 150 ℃ cooling, shaft slightly larger shaft; Quenched to 120 ℃ nitrate