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The choice of bearing material impact on the performance of the bearing

by：Waxing 2020-09-12

When testing the virtues of chrome steel and stainless steel as a bearing material, found that they are not only have antirust function. Chrome steel is one of the most common bearing material. It is more hard than stainless steel, so the service life is longer. At higher temperatures, however, its performance is not good. Under the high temperature of 120 c, it will happen enormous deformation, load decrease. Continues the high temperature of 150 c it also can stand, but the moment 150 c or higher temperature will reduce the service life of bearing. Heat treatment can make the bearing instant high temperature of 170 c. The most common used in bearing stainless steel, 440, it's hard and strong enough to load, Less than 20%) brass steel , but it can rust, can endure instant high temperature of 250 c and 300 c of the continuous high temperature. We often mistake as all of the stainless steel are no magnetic, 440 stainless steel is a magnetic, it is not completely rust, but under the influence of salt, acid, alkali. 316 grades of antirust performance is very good, no magnetic, but softer so load less, because it is not strong, so 316 bearing accuracy is not high, feel is rough.

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