Second, vacuum carburization uniformity
Table 1, Table 2, and Table 3 are the results of the uniformity test of some furnaces in the series of double chamber vacuum carburizing furnaces. The measurement point is consistent with the temperature uniformity specified by the national standard at the 5-point temperature measurement. According to the data in the table, the depth of the layer is ±0. 08 mm, and the carbon concentration is ±0.05%.
Third, the application of vacuum carburizing
1. Application of gear parts
Figure 4 shows the appearance of the 20CrMo gear parts after vacuum carburizing, the depth of the layer is 0. 38mm, 0. 64mm. Table 4 shows the deformation and hardness.
The accuracy grades of the various types of gears shown in Figure 4 are JB179 - 60 and 8DC grades. After heat treatment, they are no longer ground and directly assembled, so the deformation should be as small as possible. When the deformation is large, the motor speed is high (1450r/min), which will increase the noise and even make the assembly impossible (the inner involute spline hole cannot be processed again). 0毫米。 Within the range of 0. 05mm.
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