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Fujiwara, Yoshio; Ueda, Humihiro; Masatomi, Hiroaki; Suzuki, Hisashi

doi:10.2497/jjspm.27.181

Cited by 15 publications

(2 citation statements)

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“…To improve toughness of the alloy, powder metallurgy (PM) technique is applied. PM is effective for the fine and uniform distribution of the carbides [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Application of the Sinter-HIP Method to Manufacture Cr–Mo–W–V–Co High-Speed Steel via Powder Metallurgy

2022

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1.2C–4Cr–4Mo–10W–3.5V–10Co–Fe high-speed steel (JIS SKH57; ISO HS10-4-3-10) is often manufactured via casting and forging. By applying powder metallurgy, the properties of the abovementioned material can be improved. In this study, the effects of sintering conditions on the formation of precipitates and pores are evaluated. Additionally, strength with and without hydrostatic pressure during sintering is evaluated via static bending and impact tests. Sintering via hot isostatic pressing (HIP) at 1463 K can effectively eliminate pores and prevent the coarsening of precipitates. Toughness and strength improved by 50% by applying HIP.

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“…To improve toughness of the alloy, powder metallurgy (PM) technique is applied. PM is effective for the fine and uniform distribution of the carbides [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Application of the Sinter-HIP Method to Manufacture Cr–Mo–W–V–Co High-Speed Steel via Powder Metallurgy

2022

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“…On the other hand, studies on the fatigue behavior of hardmetals are relatively limited, even though the knowledge of fatigue mechanism is essential in the development of advanced hardmetals. Fujiwara et al [3] investigated the fatigue fracture properties of hot isostatic pressed WC-12%Co alloys. They indicated that the fatigue strength increases with the WC particle size, whereas the flexural stress decreases with an increase in the WC particle size.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cobalt Content on the Fatigue Strength of WC-Co Hardmetals

Nakajima

Hosokawa

Shimojima

2007

MSF

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The behavior of hardmetals under cyclic loads is investigated. Unnotched specimens were employed to obtain practical information regarding fatigue in hardmetals. All the tested hardmetals exhibit an increase in the number of cycles until failure with a decrease in the maximum stress, i.e., the hardmetals exhibit a high fatigue sensitivity. The fatigue strength increases with the cobalt content. Although distinct fatigue limits, as observed in metals, cannot be observed, the calculated fatigue limit stress at 107 cycles is found to be approximately 70% of the flexural strength, and the stress value exhibits a linear relationship with the flexural stress.

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