개량형 C95600 청동의 기계적 성질과 미세조직에 미치는 퀜칭 열처리의 영향

다국어 초록 (Multilingual Abstract)

Modified C95600 bronze contains Fe component if 0.7 weight percentage besides Cu-7Al-2.5Si composition. The shape of centrifugal cast is a circular pipe with thick wall. Specimens machined from the centrifugal cast were quenched in oil after isothermal holding at a given heat treatment temperature in the range of 700-900 ℃. Mechanical properties and structural morphology are depended on the quenching heat treatment temperature regardless of isothermal holding time. Tensile strength or Brinell hardness is increased with increasing heat treatment temperature. The microstructure caused by quenching contains mixing phases of α+β’+ FeSi+κ, which martensite if β’ phase has been transformed from β phase. Effect of isothermal holding temperature on mechanical properties in case of quenching heat treatment attributes to the change if volume fraction if β on the structural morphology. Mechanical characteristics of specimen, initially quenched fram 850 ℃, and then tempered at 500 ℃, does not show an obvious softerning indication, because disappearance of β’ during tempering process can be compensated by precipitation of brittle phase ?.

참고문헌 (Reference)

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