Study on the sintered characteristics and properties of nanostructured WC–15 wt% (Fe–Ni–Co) and WC–15 wt% Co hard metal alloys

Chang, Shih-Hsien; Chang, Ming-Feng; Huang, Kuo-Tsung

doi:10.1016/j.jallcom.2015.07.119

Cited by 83 publications

(28 citation statements)

References 22 publications

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“…This nding was in agreement with our previous studies. 14,20) Additionally, low-and high-magni cation SEM observations of the Cr-31.2 mass% Ti alloys after 1400 C sintering for 1 h are shown in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Chang

Huang³

2017

Mater. Trans.

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The aim of this work is to nd the optimal sintering parameters of Cr-31.2 mass% Ti alloys and simultaneously investigate the effects of the TiCr 2 Laves phases. In this study, Cr-31.2 mass% Ti alloys are fabricated by vacuum hot-press sintering. Different compositions of submicron titanium (760 nm) powders are added to micron chromium (4.66 μm) powders. The experiments utilize various hot-press sintering temperatures (1250, 1300, 1350 and 1400 C) with the pressure maintained at 20 MPa for 1 h, respectively. The experimental results show the optimal parameters of the hot-press sintered Cr-31.2 mass% Ti alloys to be 1400 C at 20 MPa for 1 h. The relative density reaches 99.96% and the hardness and TRS (transverse rupture strength) reach 81.93 HRA and 475.73 MPa, respectively. In addition, the increase in temperature of the hot-press sintering is effectively decreased the Cr 3 Ti 3 O and slightly enhanced TiCr 2 phases, which will lead to the better mechanical properties. Signi cantly, the optimal hot-press sintered Cr-31.2 mass% Ti alloys possess a dense microstructure, excellent mechanical property and good electrical conductivity value (1.51 × 10 4 S·cm

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Section: Resultsmentioning

confidence: 99%

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Chang

Huang³

2017

Mater. Trans.

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“…The grain size of the three composite binder phases prepared in this paper has decreased by 15%–28% compared with that. This is because partial or complete replacement of Co with Cr, Nb, and AlCoCrNiNb 0.5 can suppress grain growth 12,18,26 …”

Section: Resultsmentioning

confidence: 99%

“…11 Meanwhile, WC-Co-Ni-Fe has superior fracture toughness and lower sintering temperature than WC-Co, but the bending strength reduces slightly. 12 Moreover, adding Cr or Cr 3 C 2 to the Co-Ni composite phase can improve the room-temperature mechanical properties, corrosion resistance, and oxidation resistance of cemented carbides. [13][14] High-entropy alloy, because it can inhibit the WC grain growth, improves the oxidation resistance and mechanical properties of the cemented carbides, so it has become a new cemented carbide binder phase.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have demonstrated that adding Ni to Co can improve the corrosion resistance of the alloy and that the appropriate content of Ni instead of Co can inhibit WC grain growth 11 . Meanwhile, WC‐Co‐Ni‐Fe has superior fracture toughness and lower sintering temperature than WC‐Co, but the bending strength reduces slightly 12 . Moreover, adding Cr or Cr 3 C 2 to the Co‐Ni composite phase can improve the room‐temperature mechanical properties, corrosion resistance, and oxidation resistance of cemented carbides 13‐14 .…”

Section: Introductionmentioning

confidence: 99%

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Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Wang

Sun

et al. 2020

Int J Applied Ceramic Tech

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In order to develop a new high-performance binder phase, four different alloys Co-Ni-Fe, Co-Ni-Cr, Co-Ni-Nb, and AlCoCrNiNb 0.5 were used as a binder in cemented carbides. The room-temperature mechanical properties and high-temperature flexural strength of cemented carbides were studied. The results show that the optimal mechanical properties for the WC-8(Co-Ni-Fe, Co-Ni-Cr, Co-Ni-Nb, and AlCoCrNiNb 0.5) can be obtained at the sintering temperatures of 1200°C, 1350°C, 1350°C, and 1300°C, respectively. Compared with cemented carbides with Co as binder phase, the hardness of the four kinds of alloys is increased, the WC grain size becomes finer, but the fracture toughness is slightly decreased. When the temperature is under 600°C, there is no visible oxidation of the four kinds of cemented carbides, and their bending strengths are basically not reduced. When the temperature increased from 600°C to 900°C, the WC-8(Co-Ni-Nb) and WC-8(Co-Ni-Fe) samples present the better high-temperature bending resistance compared with the WC-8(Co-Ni-Cr) and WC-8AlCoCrNiNb 0.5 samples, with respective decrease in bending strength of 11.7% and 7.3%. K E Y W O R D S carbides, composite binder phase, mechanical properties, spark plasma sintering How to cite this article: Yu B, Wang Z, Sun N, et al. Effects of composite binder phase on microstructure and mechanical properties of ultrafine-grained cemented carbides.

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“…İkinci önemli karakteristik özelliği ise, kobalt, nikel ve demirle iyi ıslatabilirliğe ve birleşme eğilimine sahip olmasıdır. Bu elementlerle yüksek ıslatabilirliği, WC' ün kompozit yapı oluşturmasını mümkün kılar [86][87][88][89][90]. Kobalt oranı %4-28 arasında değişir.…”

Section: Ki̇myasal Bi̇leşi̇m Ve Mi̇kroyapininunclassified

Çeliklerin işlenebilirliği: kimyasal bileşim, mikroyapı, mekanik özellikler ve işlenebilirlik ilişkisi

Özçatalbaş

2020

Politeknik Dergisi

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ÖZ "İşlenebilirlik" işlenen malzemenin bir özelliğidir ve ancak malzemenin nitelikleri değiştirilerek işlenebilirliği değiştirilebilir. Bu durum ise, malzemenin kimyasal ve fiziksel özelliklerindeki değişimle sağlanır. Derleme niteliğindeki bu çalışma ile "İşlenebilirlik" kavramını kapsamlı şekilde açıklamak ve çeliklerin işlenebilirliğini geliştirmek amaçlı yapılan çalışmaları tartışmak amaçlanmıştır. İşlenebilirlik değerlendirmelerinde, genel olarak çeliklerin mekanik özellikleri ve esasen sertlikleri dikkate alınır. Sertliği arttıran esas element olan karbon miktarı ve ısıl işlemlerle oluşturulan mikroyapılarına bağlı işlenebilirlik değerlendirilir. Bununla birlikte, mekanik özelliklerde belirgin bir değişiklik oluşturmaksızın işlenebilirliği artıran S, Pb, Bi ve Te gibi elementlerin ilavesi, talaşlı işlenebilirliği önemli oranda geliştirir. İşlenebilirlik değerlendirmesi ise, talaş kaldırma sürecinde oluşan kesme kuvveti, takım ömrü, yüzey kalitesi ve talaş biçimi dikkate alınarak derecelendirilir. Kimyasal bileşim ve mikroyapının çeliklerin işlenebilirlik derecelendirmesine etkisi, malzeme ve metalürji bilimi alanında en çok çalışılan konulardan biridir. Çeliğin üretim sürecindeki değişkenlerinin yanında, ısıl işlemlerle oluşturulan mikroyapıya bağlı işlenebilirlik değerlendirmeleri de önemlidir. Belirtilen işlemlerle sağlanan mikroyapıdaki fazların heterojen dağılımları, işlenebilirlik değerlendirmelerinde göz ardı edilmemelidir.

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Study on the sintered characteristics and properties of nanostructured WC–15 wt% (Fe–Ni–Co) and WC–15 wt% Co hard metal alloys

Cited by 83 publications

References 22 publications

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Çeliklerin işlenebilirliği: kimyasal bileşim, mikroyapı, mekanik özellikler ve işlenebilirlik ilişkisi

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