This paper presents the properties of the U-joint spiders and the worms of recirculating ball steering gear which made from a low quenchability steel 60D, as well as their testing results on the road.
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然后采用不同直径的试样测定其临界淬透直径,用金相法观察其组织变化,分析其低淬透性原因。
The structure was observed with the metallograph. The reason of low hardenability of steel Cf53 is analysed.