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軸承圈 軌道面 SEM photos of the raceway.
Flap:小薄片. 剝落/翹起的鉄屑被鋼珠碾壓成一薄片( f 圍住,無砂輪磨痕的區域)---可能只有2~3um厚. 鋼珠在這些凹凹凸凸的軌道面滾動, 不生噪音也難. 你們說是嗎? Spalled chips flattened by balls rolling over them and make chips into flaps. These flaps maybe just a few um thick only, but they, along with pits, make the raceway a bumpy road for steel balls to roll. Loud bearing noise is a matter of course.
液析碳化物區域 就是碳化物剝離/脫落之處.
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