作者对原有四球机进行了局部的重新设计,将试样的点接触形式改成了面接触形式,并且增加了冷却系统,使下试样下部浸在循环冷却液中相对滑动,有效地抑制了高速重载强化试验条件下的摩擦温升。特殊的设计保证了平面与平面接触的充分贴合。试验结果表明,本装置对于不同的试样具有较好的灵敏性,对于相同的试样具有较好的重现性,因而试验结果比较可靠。 The author of the original four-ball machine was partially redesigned, the sample point contact form into surface contact form, and an increase of the cooling system, so that the lower part of the sample immersed in the circulating coolant relative sliding, effectively inhibit Friction temperature rise under high speed heavy load test. Special design ensures the plane and the plane contact fully fit. The test results show that the device has good sensitivity to different samples and better reproducibility for the same sample, so the test results are more reliable.