High Cycle Fatigue and Abrasive Wear Resistance Properties of PDI, Gas-Carburizing-Treated PDI and ADI

With a gas carburizing treatment processed to pearlitic ductile cast iron (CPDI), the investigations were carried out about its high cycle fatigue strength and abrasive wear resistance. The high cycle fatigue strength were evaluated by rotating bending fatigue tests, and the fatigue strength was imp...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series A Vol. 64; no. 625; pp. 2333 - 2338
Main Authors DOI, Shigeru, IKEDA, Hideo, UESAKA, Shujirou, MITSUNAGA, Kouichi
Format Journal Article
LanguageEnglish
Japanese
Published The Japan Society of Mechanical Engineers 1998
Subjects
Gas Carburizing
High Cycle Fatigue
Martensite Structure
Pearlitic Ductile Cast Iron
Rotating Bending
Wear-Resistance
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Summary:With a gas carburizing treatment processed to pearlitic ductile cast iron (CPDI), the investigations were carried out about its high cycle fatigue strength and abrasive wear resistance. The high cycle fatigue strength were evaluated by rotating bending fatigue tests, and the fatigue strength was improved about 20 MPa greater than virgin test pieces not-carburized (PDI). The crack initiating point and fracture is from irregular graphites of surface or from microdefects in casting, which PDI and CPDI specimens were not in an inner type fracture. Furthermore, a good result was obtained in the abrasive wear resistance test than in that of austempered ductile cast iron (ADI). Those were expressed by the difference of matrix structures. Its matrix structure of CPDI is transformed a martensite structure from SEM observation.
ISSN:0387-5008
1884-8338
DOI:10.1299/kikaia.64.2333