超高炭素クロム鋼のすべり摩耗特性

抄録

The sliding wear performance of high carbon-chromium steels has been investigated. The specimens were prepared by hot forging and isothermal rolling in order that the sizes of grains and size, shape and distributed carbide particles were varied. The wear tests were carried out by changing contact load, hardness of specimen and contact ring without lubricant. The wear resistance was determined by weight loss after 100 h sliding.
The results obtained were as follows:
1) The wear loss of quenched and tempered structure increased with increasing the contact load, decreasing the hardness of specimen and decreasing the ring hardness.
2) For as-worked structure, forged or pearlite structure had more improved wear resistance than rolled or ferritic structure. While wear resistance of rolled structure was better than that of forged one in the case of quenched-and-tempered structure.
3) As-forged structure which consisted of pearlite showed as much waer resistance as quenched structure.
4) Wear surface was flat in the case of hard specimen against hard ring, whereas combination of soft-soft tended to become rough. The thickness of wear damaged layer was almost constant in spite of hardness or structure.