Effect of deep cryogenic treatment on the fracture toughness and wear resistance of WC-Co cemented carbides

Weng, Zeju; Gu, Kai; Liu, Xuanzhi; Cai, Huikun; Wang, Junjie

doi:10.1016/j.ijrmhm.2019.105059

Cited by 26 publications

(10 citation statements)

References 25 publications

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“…So, it is hypothesized that the transformation of cobalt from FCC to HCP structure resulted in improved tool life. An increase in the coercive force value and a corresponding improvement in the wear properties of WC-Co hardmetal were seen by other researchers as well [28,29]. The presence of higher slip system in cubic lattices makes the material ductile.…”

Section: Metallurgical Evaluationmentioning

confidence: 55%

Investigation on the effect of cryogenic treatment on tungsten carbide milling insert with 11% cobalt (WC–11%Co)

Muthuswamy¹,

Dinakaran

2020

SN Appl. Sci.

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The objective of this research is to evaluate the performance of cryogenically treated cemented carbide milling inserts with 11% cobalt content in face milling of EN19 steel. Two different deep cryogenic treatments at temperature of around − 193 °C were performed on the inserts, namely cryogenic treatment and cryogenic treatment and tempering. Uncoated tungsten carbide face milling inserts with 11% cobalt content were used in this research. Machining tests were conducted at the catalog recommended cutting parameters, and flank wear and nose wear of untreated, cryogenically treated and cryogenically treated and tempered inserts were compared to study the performance. The experimental investigation revealed that both cryogenic treated and cryogenic treated and tempered inserts showed 4-7% lesser flank and nose wear than the untreated inserts. The metallurgical examinations using indirect measurement technique revealed the phase transformation of cobalt from FCC to HCP which could have resulted in increased hardness, reduced friction coefficient and improved tool life.

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Section: Metallurgical Evaluationmentioning

confidence: 55%

Investigation on the effect of cryogenic treatment on tungsten carbide milling insert with 11% cobalt (WC–11%Co)

Muthuswamy¹,

Dinakaran

2020

SN Appl. Sci.

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“…Clearly, more grains abnormally grow in the alloy after the fourth sintering. These grains are more brittle and break faster under the same stress 30 . As shown in Figure 6C,D, the crack path is almost straight.…”

Section: Resultsmentioning

confidence: 83%

“…These grains are more brittle and break faster under the same stress. 30 As shown in Figure 6C,D, the crack path is almost straight. Moreover, the excessively coarsened WC grains behavior and the ceramic propert larly in the Sejnène region, northw the chemical composition, these c terized by high iron contents who of the ceramic materials is well k of fluxing agents as alkali and alk are necessary for low temperatur considered materials consist entir containing impurities, mostly ill iron, which serve as fluxing agen at low temperature [3][4][5][6] and appeare physical and mechanical propertie ramic materials.…”

Section: Mechanical Propertiesmentioning

confidence: 82%

Microstructure and properties of WC‐8Co cemented carbides prepared by multiple spark plasma sintering

Chen

Wang

et al. 2021

Int J Applied Ceramic Tech

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In this study, WC‐8Co cemented carbides were prepared by spark plasma sintering. When the samples sintered at 1300℃ were cooled to room temperature, the samples were sintered multiple times at 1250℃. The changes in microstructure and mechanical properties of WC‐8Co cemented carbides prepared by multiple spark plasma sintering were studied. The hardness of cemented carbides increased in the first two sintering, reaching 16.5 GPa. However, the hardness decreased seriously in the last two sintering. The attenuation rates of hardness were 6.2% and 2.5% due to the abnormal coarse grains. Furthermore, the crack path along the grain boundary was almost straight, causing a decrease in the indentation fracture toughness of cemented carbides. Additionally, the grains of cemented carbides were abnormally coarsened, and the morphologies of grains became unstable due to multiple sintering.

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“…117 Weng et al in their research shown that cryogenically treated WC-Co (-196⁰C) cemented carbide samples had higher fracture toughness K IC value as a result there were a formation of twists and turns during crack propagation as shown in supplementary Figure 18(b). which directly indicated higher energy consumption in cryogenically treated WC-20Co cemented carbide samples 168 that made more difficult for crack to propagate in DCT sample than untreated sample.…”

Section: Fatigue Strengthmentioning

confidence: 94%

Effect of cryogenic treatment on properties of materials: A review

Singh

Pandey

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The objective of this review paper is to introduce Cryogenic temperature effect on different properties of materials. Results showed that cryogenic operation improves properties like hardness, fatigue strength, tensile strength, toughness and resistance to wear in comparison to conventional operations. The improvement is a result of microstructural changes at cryogenic temperature which helps in conversion of austenite to martensite and carbide nucleation. The results also showed that doing tempering before or after cryogenic operation has significant influence on material properties which helps to achieve better carbide distribution. Different heat treatment sequences which involve tempering before or after Deep Cryogenic Treatment (DCT), provides varied results. Soaking time at cryogenic temperature also has an important role in refinement of microstructure and affect material properties.

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Effect of deep cryogenic treatment on the fracture toughness and wear resistance of WC-Co cemented carbides

Cited by 26 publications

References 25 publications

Investigation on the effect of cryogenic treatment on tungsten carbide milling insert with 11% cobalt (WC–11%Co)

Investigation on the effect of cryogenic treatment on tungsten carbide milling insert with 11% cobalt (WC–11%Co)

Microstructure and properties of WC‐8Co cemented carbides prepared by multiple spark plasma sintering

Effect of cryogenic treatment on properties of materials: A review

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