An Experimental Study on Mechanism of Cermet Grinding

Zheng, H.W.; Cai, Guang Qi; Wang, S.L.; Yuan, Suo Xian

doi:10.1016/s0007-8506(07)62717-6

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…2 Tagliabue 3 conducted resin-bonded diamond grinding of mixed carbide cermets in the form of inserts and characterised cermet grinding as a low material removal and high power-consuming process. Zheng et al 4 aptly described the process of dry diamond grinding of cermets as the removal of a ductile material having numerous hard brittle pellets in the form of chips, which was attributed to the intermittent manner of softening of the metal phase present in the cermet. For another cermet (Ti(CN)), hybrid diamond wheels could be successfully employed with flood cooling (using commercial coolants and water separately).…”

Section: Introductionmentioning

confidence: 99%

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Paul

Ghosh

2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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In contrary to the common notion that MoS2 is ineffective in water environment, this study evidentially justifies the potential of aqueous MoS2 nanofluid as a cutting fluid in grinding application. The ceramic-metal composite, WC-Co has been ground under small quantity cooling lubrication environment using this nanofluid. Parameters like grinding forces, surface roughness, chip, surface morphology and residual stress were under the focus of the study to assess the performance of the nanofluid beside commonly used soluble oil. The suitability of aqueous MoS2 nanofluid as a lubricant and coolant was first evaluated by conducting tribological and hot plate experiments, respectively. The cooling capability of MoS2 nanofluids, when dosed in aerosol form at the grinding interface extended grit sharpness which led to prolonged shearing action of the grits as compared to rapid grit dulling observed in alternative environments like flood cooling and small quantity cooling and lubrication using soluble oil. The chips formed during MoS2 nanofluid aerosol were also finer due to strain hardening of the cobalt phase leading to premature, stunted ductile fracture of the material. The residual stress of ground surface under nano-small quantity cooling lubrication environment was less compressive than small quantity cooling lubrication with soluble oil due to reduced rubbing by sharper grits. The overall outperformance of aqueous MoS2 nanofluid over soluble oil as cutting fluid is thus established.

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Section: Introductionmentioning

confidence: 99%

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Paul

Ghosh

2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…It was also found that for increasing grain size or increasing cobalt content, the hardness decreases. Grinding experiments were performed on cemented carbides under various conditions such as dry grinding, wet grinding or even electrochemical grinding [7,8,9]. Here, we focus on the grinding of WCs with a fixed amount of cobalt with various grain sizes.…”

Section: Introductionmentioning

confidence: 99%

Grinding of WC–Co hardmetals

Hegeman¹,

Hosson²

2001

Wear

160

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“…Machine : Cemented carbide cylinders are machined using various grinding machines and conditions (such as dry and wet) [ 16 , 60 ]. Conventional grinding often employs a wheel with diamond abrasive grains of varying sizes, ranging from hundreds (roughing) to a few (polishing) μm, which are embedded in a metal or resinoid binder [ 16 ].…”

Section: State Of the Art Of Wc-co Grinding Sludge Recycling Methodsmentioning

confidence: 99%

Direct Recycling of WC-Co Grinding Chip

et al. 2023

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Grinding is a finishing process for high precision, high surface quality parts, and hard materials, including tool fabrication and sharpening. The recycling of grinding scraps, which often contain rare and costly materials such as tungsten carbide (WC-Co), has been established for decades. However, there is a growing need for more energy-efficient and environmentally friendly recycling processes. Currently, grinding sludges, which are a mixture of abrasives, lubricants, and hard metal chips, are only treated through chemical recycling. Direct recycling (“reuse” of chips as raw material) is the most effective but not yet viable process due to the presence of contaminants. This paper presents an oil-free dry grinding process that produces high-quality chips (i.e., oil-free and with few contaminants, smaller than 60 mesh particle size) that can be directly recycled, as opposed to the oil-based wet grinding that generates sludges, which require indirect recycling. The proposed alternative recycling method is validated experimentally using WC-Co chips from a leading hard metals’ processing specialized company. The contaminant level (oxygen 0.8 wt.%, others < 0.4 wt.%), granulometry (chip D50 = 10.4 µm with grain size < 3 µm) and morphology of the recycled chips’ powder is comparable to commercial powders proving the research and industrial potential of direct recycling. The comparison of sintered products using recycled and commercial powder provided equivalent characteristics for hardness (HRA of 90.7, HV30 of 1430), porosity grade (A02-04) and grain size (<3 µm).

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An Experimental Study on Mechanism of Cermet Grinding

Cited by 9 publications

References 2 publications

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Grinding of WC–Co hardmetals

Direct Recycling of WC-Co Grinding Chip

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An Experimental Study on Mechanism of Cermet Grinding

Cited by 9 publications

References 2 publications

Suitability of aqueous MoS2 nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Suitability of aqueous MoS2 nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Grinding of WC–Co hardmetals

Direct Recycling of WC-Co Grinding Chip

Contact Info

Product

Resources

About

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets

Suitability of aqueous MoS₂ nanofluid for small quantity cooling lubrication–assisted diamond grinding of WC-Co cermets