Solid state bonding of spheroidal graphite cast irons. (Report 3). Fatigue strengths of solid state bouded joints of spheroidal graphite cast irons.

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Other Title
  • 球状黒鉛鋳鉄固相接合材の疲労強度
  • Solid State Bonding of Spheroidal Graphite Cast Irons (Report 3)
  • 球状黒鉛鋳鉄の固相接合(第3報)

Abstract

Fatigue strengths of diffusion bonded joints of spheroidal graphite cast irons and the spheroidal graphite cast iron to a mild steel have been investigated using the rotating bending fatigue test machine. The results obtained are as follows; (1) When tensile strength of the base metal of the spheroidal graphite cast iron was 500 to 800 MPa, the fatigue limit of these joints was a nearly constant value of 240 to 250 MPa though that of the base metal increased as the tensile strength of the base metal increased. (2) Fa-tigue strength at 105 and 106 cycles in the spheroidal graphite cast iron joint which was annealed to be changed the structure from ferrite+pearlite to all ferrite was almost the same as that of the base metal of the ferritic spheroidal graphite cast iron. However, the fatigue limit of the joint was lower than that of the base metal by 20 MPa. (3) Fatigue strengths at 105 and 106 cycles in the joint of the cast iron to the mild steel and after ferritizing of the joint were almost the same as that of the base metal of the ferritic spheroidal graphite cast iron. (4) When the joint of spheroidal graphite cast iron having the tensile strength of about 500 MPa was heat-treated at 950°C for 21.6 ks, the fatigue limit was improved up to that of the base metal.

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Details 詳細情報について

  • CRID
    1390001204722102528
  • NII Article ID
    130003764816
  • DOI
    10.2207/qjjws.6.374
  • ISSN
    24348252
    02884771
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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