Low content and free cobalt matrixes for diamond tools

Spriano, Silvia Maria; Chen, Qiuping; Settineri, Luca; Bugliosi, S.

doi:10.1016/j.wear.2005.02.076

Cited by 46 publications

(18 citation statements)

References 10 publications

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“…1, weight; 2, pin chuck; 3, steel pin; 4, sample; 5, vice; 6, hand lever (a) and setup of a testing device according to West [93]. 1, weight; 2, pin guide; 3, steel pin; 4, sample; 5, vice sled; 6, hand crank (b) [92,94]. …”

Section: Powder Metallurgy -Fundamentals and Case Studiesmentioning

confidence: 99%

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Peter¹,

Rosso²

2017

Powder Metallurgy - Fundamentals and Case Studies

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Among other materials, hard metals represent an important family of functional materials. They show properties that are combinations of those of their constituents. The general idea while using hard metals is to exploit their excellent properties in terms of hardness, toughness, wear resistance, and chemical stability. These characteristics made hard metals as promising candidate for use as a cutting tool, which constitutes their main area of application. Depending on the particular use, the most important properties can be achieved: (i) by properly selecting the constituents made up the whole composition, (ii) by varying the relative composition of the phases, or (iii) by applying a suitable hard metal coating layer on the top of the cutting tool. This chapter presents a general overview of the actual scenario concerning different tool materials, including a short history and description of state-of-the-art techniques as regards their composition, their manufacturing routes and their most important properties. Some results of the own research in this field are carried out during the years will integrate this part.

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Section: Powder Metallurgy -Fundamentals and Case Studiesmentioning

confidence: 99%

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Peter¹,

Rosso²

2017

Powder Metallurgy - Fundamentals and Case Studies

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“…Severe service conditions (impact stresses, hydro-abrasive wear, and elevated temperature) and cost reduction demand that the mechanical properties and wear resistance be improved [8]. Several kinds of new metal matrixes have been introduced into impregnated diamond tool fabrication in recent years [9,10,11]. However, the properties of these metal matrices are difficult to adapt to different rocks and, hence, wear out much faster than diamond grits when processing hard and abrasive rocks.…”

Section: Introductionmentioning

confidence: 99%

The Effect of ZrO2 Nanoparticles on the Microstructure and Properties of Sintered WC–Bronze-Based Diamond Composites

Sun

et al. 2016

Materials

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Metal matrix-impregnated diamond composites are widely used in diamond tool manufacturing. In order to satisfy the increasing engineering requirements, researchers have paid more and more attention to enhancing conventional metal matrices by applying novel methods. In this work, ZrO2 nanoparticles were introduced into the WC–bronze matrix with and without diamond grits via hot pressing to improve the performance of conventional diamond composites. The effects of ZrO2 nanoparticles on the microstructure, density, hardness, bending strength, and wear resistance of diamond composites were investigated. The results indicated that the hardness and relative density increased, while the bending strength decreased when the content of ZrO2 nanoparticles increased. The grinding ratio of diamond composites increased significantly by 60% as a result of nano-ZrO2 addition. The enhancement mechanism was discussed. Diamond composites showed the best overall properties with the addition of 1 wt % ZrO2 nanoparticles, thus paving the way for further applications.

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“…Not only Co but also Cobalt-Bronze (Co-CuSn) and Fe-Co are used in this kind of diamond cutting tools for cutting marbles [2]. Owing to high toxicity of Co, danger of the inhale of metal powders or metal dust during the cutting processes, and great variations of trade price, Co is, thus, no longer for the best choice in some diamond tools' application [2,3]. To avoid these negative things, researchers have tried to develop new alloy materials that tend to be used as metal matrix in diamond cutting tools, aiming for minimization of the Co content.…”

Section: Introductionmentioning

confidence: 99%

Effect of Decreasing of Cobalt Content in Properties for Diamond∕Cemented Carbide Tools

Waratta¹,

Hamdi²,

Ariga³

et al. 2010

AIP Conference Proceedings

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High magnetostriction and coupling coefficient for sintered cobalt ferrite derived from superparamagnetic nanoparticles Appl. Phys. Lett. 101, 072405 (2012) Electrical and thermoelectric properties of single-wall carbon nanotube doped Bi2Te3 Appl. Phys. Lett. 101, 031909 (2012) The effect of Peltier heat during current activated densification Appl. Phys. Lett. 101, 013113 (2012) Studies of sintered MRE-Fe-B magnets by DyF3 addition or diffusion treatment (MRE=Nd+Y+Dy) J. Appl. Phys. 111, 07A736 (2012) Properties of hydrogenation-disproportionation-desorption-recombination NdFeB powders prepared from recycled sintered magnets Abstract. Powder metallurgy plays a role in manufacturing such as automotive and cutting tool applications. Diamond/cemented carbide tools are also made from this technique. Diamond particle and other matrix materials were employed in this study. The purpose is to investigate the physical and mechanical properties of different Cobalt (Co) content samples by using Taguchi's method. The materials used in the experiments were mixed by using a ball-mill machine. The mixed powders were pressed by conventional method. Then the green samples were sintered in a vacuum furnace. After reaching 500 º C, the samples were sintered with Argon (Ar) gas. The sintered samples were investigated density by immersion method, porosity by water saturation method, and hardness by Vicker hardness tester. It was found that with 59.5% Co content, plain diamond type, sintering temperature of 950ºC, sintering time of 40 minutes, and pressure of 625 MPa, density, porosity, and hardness got the best result in this study. From the Taguchi's analysis, the significant factors effected the performance were composition, sintering temperature, and sintering time.

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Low content and free cobalt matrixes for diamond tools

Cited by 46 publications

References 10 publications

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

Manufacturing, Composition, Properties and Application of Sintered Hard Metals

The Effect of ZrO2 Nanoparticles on the Microstructure and Properties of Sintered WC–Bronze-Based Diamond Composites

Effect of Decreasing of Cobalt Content in Properties for Diamond∕Cemented Carbide Tools

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