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钢球表面强化工序安排在硬磨工序后,强化后的钢球表面硬度要求能提高1～3HRC,并要求硬度均匀。本试验结果得出强化时间与硬度值增量的近似关系式为△H=t/ct+1.45,式中,△H—硬度值增量(HRC);t—强化时间(小时);C—钢球型号系数。最佳强化时间应是球内硬度最大极差和球间硬度最大极差降到最低值时的那个时间,对≥3/8吋钢球最佳强化时间为4小时左右,<38吋球则为6小时左右。
Steel ball surface strengthening process arranged in the hard grinding process, the strengthened steel ball surface hardness requirements can improve 1 ~ 3HRC, and require uniform hardness. The results of this test show that the approximate relation between the hardening time and the increment of hardness value is ΔH = t / ct + 1.45, where ΔH - hardness increment (HRC); t - strengthening time (hours) Ball model factor. The best reinforcement time should be the ball maximum hardness and maximum difference between the ball to the minimum when the hardness of the minimum time, for ≥ 3/8 inch steel ball optimum strengthening time of about 4 hours, <38-inch ball About 6 hours.