scholarly journals Effect of WC Nanoparticles on the Microstructure and Properties of WC-Bronze-Ni-Mn Based Diamond Composites

2018 ◽  
Vol 8 (9) ◽  
pp. 1501 ◽  
Author(s):  
Siqi Li ◽  
Zhe Han ◽  
Qingnan Meng ◽  
Xinzhe Zhao ◽  
Xin Cao ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Metal Matrix ◽  
Bending Strength ◽  
Strengthening Mechanism ◽  
Experimental Results ◽  
Microstructure And Properties ◽  
Diamond Tools ◽  
Grinding Ratio

Metal matrix-impregnated diamond composites are widely used for fabricating diamond tools. In order to meet the actual engineering challenges, researchers have made many efforts to seek effective methods to enhance the performance of conventional metal matrices. In this work, tungsten carbide (WC) nanoparticles were introduced into WC-Bronze-Ni-Mn matrix with and without diamond grits for improving the performance of conventional impregnated diamond composites. The influence of WC nanoparticles on the microstructure, densification, hardness, bending strength and wear resistance of matrix and diamond composites were investigated. The results showed that the bending strength of matrix increased up to approximately 20% upon nano-WC addition, while densification and hardness fluctuate slightly. The grinding ratio of diamond composites increased significantly by about 100% due to nano-WC addition. The strengthening mechanism was proposed according to experimental results. The diamond composites with 2.8 wt% nano-WC addition exhibited the best overall properties, thus having potential to apply to further diamond tools.

scholarly journals Improvement in Hardness and Wear Behaviour of Iron-Based Mn–Cu–Sn Matrix for Sintered Diamond Tools by Dispersion Strengthening

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1774
Author(s):  
Elżbieta Cygan-Bączek ◽  
Piotr Wyżga ◽  
Sławomir Cygan ◽  
Piotr Bała ◽  
Andrzej Romański
Keyword(s):  
Wear Resistance ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Material ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Diamond Tools ◽  
Abrasion Wear ◽  
Sintered Diamond ◽  
Abrasive Stone

The work presents the possibility of fabricating materials for use as a matrix in sintered metallic-diamond tools with increased mechanical properties and abrasion wear resistance. In this study, the effect of micro-sized SiC, Al2O3, and ZrO2 additives on the wear behaviour of dispersion-strengthened metal-matrix composites was investigated. The development of metal-matrix composites (based on Fe–Mn–Cu–Sn–C) reinforced with micro-sized particles is a new approach to the substitution of critical raw materials commonly used for the matrix in sintered diamond-impregnated tools used for the machining of abrasive stone and concrete. The composites were prepared using spark plasma sintering (SPS). Apparent density, microstructural features, phase composition, Young’s modulus, hardness, and abrasion wear resistance were determined. An increase in the hardness and wear resistance of the dispersion-strengthened composites as compared to the base material (Fe–Mn–Cu–Sn–C) and the commercial alloy Co-20% WC provides metallic-diamond tools with high-performance properties.

Wear Characteristics of Various Diamond Tools in Cutting of Tungsten Carbide

2011 ◽  
Vol 325 ◽  
pp. 153-158 ◽  
Author(s):  
Akihiko Kubo ◽  
Yasushi Mochida ◽  
Junichi Tamaki ◽  
Katsuko Harano ◽  
Hitoshi Sumiya ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Vapour Deposition ◽  
Diamond Tool ◽  
Chemical Vapour ◽  
Polycrystalline Diamond ◽  
Wear Characteristics ◽  
Diamond Tools ◽  
Flank Face ◽  
Monocrystalline Diamond

Face cutting of tungsten carbide was conducted using two monocrystalline diamond tools and three polycrystalline diamond tools to investigate the wear characteristics in terms of the crystal structure and composition of the diamond. It was found that the wear of the monocrystalline diamond tool depends on the crystal planes that form the rake face and flank face of the cutting tool, and a cleavage fracture occurs when the cutting force acts as a shear force on the (111) crystal plane. The binderless nano-polycrystalline diamond tool exhibits excellent wear resistance beyond those of the sintered polycrystalline diamond tool and chemical vapour deposition polycrystalline diamond tool, as well as better wear resistance than the monocrystalline diamond tool.

scholarly journals Mechanical and Wear Behaviour of Severe Plastic Deformed Al6063-Nano Al2O3 Composites Processed by Constrained Groove Pressing (CGP)

2020 ◽  
Vol 8 (5) ◽  
pp. 4648-4655
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Crystalline Structure ◽  
Metal Matrix ◽  
Bending Strength ◽  
Matrix Alloy ◽  
Aluminium Matrix ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Weight Percentage

Metal matrix composites have been developed to meet the demand for lighter materials with high specific strength, stiffness and wear resistance. Particulate reinforced aluminium matrix composites are attractive materials due to their strength, ductility and toughness. The aluminium matrix is strengthened when it is reinforced with hard ceramic phases. Most of the metal matrix compound undergoes severe plastic deformation (SPD). SPD is a method to obtain fine crystalline structure in different bulk metals and alloys which possess different crystalline structure. The objective of the present work is to synthesize Al-6063 alloy by stir casting method and varying weight percentage of nano Al2O3 in steps of 2, 4, and 6 wt %. The composites are prepared using the process of compressed groove pressing (CGP) with extreme plastic deformation. The composite is characterized for mechanical and wear behaviour. SEM microphotographs confirmed the distribution of nano Al2O3 particles in the Al6063 Matrix alloy. In addition, SEM micrographs of Al6063 alloy with nano Al2O3 after constrained groove pressing shown grain refinement. Improvements in Hardness, UTS, yield strength, bending strength, percentage elongation and wear resistance of the Al-6063 matrix are obtained with the addition of Al2O3 particulates and also the properties are further enhanced with CGP. The developed metal matrix nano composite may be an alternative material for manufacturing of bearings.

Study on Pr6O11-Doped Superfine-Grained WC-Co Cemented Carbides

2014 ◽  
Vol 529 ◽  
pp. 57-61
Author(s):  
Jun Wang ◽  
Qi Kun Yang
Keyword(s):  
Grain Growth ◽  
Bending Strength ◽  
Experimental Results ◽  
Cemented Carbide ◽  
Cemented Carbides ◽  
Microstructure And Properties

Effect of Pr6O11addition on the microstructure and properties of superfine-grained WC-Co cemented carbide was studied by experiments. The experimental results show that Pr6O11can inhibit WC grain growth. In addition, the η phase firmed when the content of Pr6O11was more than 0.8%. When Pr6O11dopant amount is 0.4% and 0.8%, the alloy has the best bending strength and the best hardness respectively.

scholarly journals Effect of Deep Cryogenic Treatment on Microstructure and Properties of Sintered Fe–Co–Cu-Based Diamond Composites

2019 ◽  
Vol 9 (16) ◽  
pp. 3353
Author(s):  
Siqi Li ◽  
Wenhao Dai ◽  
Zhe Han ◽  
Xinzhe Zhao ◽  
Baochang Liu
Keyword(s):  
Bending Strength ◽  
Great Increase ◽  
Cryogenic Treatment ◽  
Strengthening Mechanism ◽  
Strength Test ◽  
Deep Cryogenic Treatment ◽  
Grinding Ratio ◽  
Overall Performance ◽  
Fracture Morphologies ◽  
Composite Samples

Metal-matrix-impregnated diamond composites are used for fabricating many kinds of diamond tools. In the efforts to satisfy the increasing engineering requirements, researchers have brought more attention to find novel methods of enhancing the performance of impregnated diamond composites. In this study, deep cryogenic treatment was applied to Fe–Co–Cu-based diamond composites to improve their performance. Relative density, hardness, bending strength, and grinding ratio of matrix and diamond composite samples were measured by a series of tests. Meanwhile, the fracture morphologies of all samples after the bending strength test were observed and analyzed by scanning electron microscope. The results showed that the hardness and bending strength of matrix increased slightly after deep cryogenic treatment. The grinding ratio of impregnated diamond composites exhibited a great increase by 32.9% as a result of deep cryogenic treatment. The strengthening mechanism was analyzed in detail. The Fe–Co–Cu-based impregnated composites subjected to deep cryogenic treatment for 1 h exhibited the best overall performance.

Effects of TiH2 on the Properties of Fe-Based Diamond Composites

2005 ◽  
Vol 291-292 ◽  
pp. 27-32 ◽  
Author(s):  
Qiu Lian Dai ◽  
Xi Peng Xu
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Metal Matrix ◽  
Experimental Results ◽  
Bending Test ◽  
The Matrix ◽  
Base Matrix ◽  
Circular Sawing ◽  
Saw Blade ◽  
Worn Surface

Effects of TiH2 on the mechanical properties and microstructures of Fe-based diamond composites as well as the performance of diamond segments in circular sawing of granites are presented in this paper. Experimental results reveal that the addition of 2%TiH2 into the Fe-based matrix leads to decreases in the mechanical properties of both matrix and diamond composites. The wear resistance of the saw-blade segments decreases by 7.3%. Microscope observations reveal that the specimen without TiH2 shows fewer pores and denser structures in the base matrix. The fracture surfaces of the bending test specimens exhibit ductile cup and cone behavior and strong bonding between the matrix and diamond. SEM micrographs indicate that there are much more pull-outs of diamond grits, much more serious wear of diamond particles and erosion of metal matrix on the worn surface of saw-blades segments with 2% TiH2 in the matrix.

Effect of different reinforcement on the microstructure and mechanical properties of AA2024-based metal matrix nanocomposites

2020 ◽  
Vol 111 (5) ◽  
pp. 416-423
Author(s):  
Abdullah Hasan Karabacak ◽  
Aykut Çanakçı ◽  
Fatih Erdemir ◽  
Serdar Özkaya ◽  
Müslim Çelebi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Hot Pressing ◽  
Metal Matrix ◽  
Bending Strength ◽  
Experimental Results ◽  
Metal Matrix Nanocomposites ◽  
Microstructure And Mechanical Properties ◽  
Matrix Nanocomposites

Abstract In this study, AA2024-B4C and AA2024-SiC nanocomposites were successfully produced by hot pressing and consolidation methods. The effects of different SiC and B4C contents on the mechanical properties and microstructure of the nanocomposites were investigated. The bending and tensile strength of AA2024-2 wt.% B4C nanocomposites reached up to 1286.7 MPa and 392.9 MPa, respectively. The bending strength of 676.7 MPa and tensile strength of 377.7 MPa were obtained for AA2024-2 wt.% SiC nanocomposites. The addition of the reinforcement can increase the bending strength of the nanocomposites even if porosity increases. Comparing the experimental results showed that B4C reinforced nanocomposites exhibited better mechanical properties than those of SiC reinforced nanocomposites. The type of Al2Cu phase plays a major role in the improvement of mechanical properties of the composites.

scholarly journals Mechanical and tribological properties of As-cast Al6061-Tungsten carbide metal matrix composites

2010 ◽  
Vol 7 (2) ◽  
pp. 355-368 ◽  
Author(s):  
A. R. K. Swamy ◽  
A. Ramesha ◽  
J. N. Prakash ◽  
G. B. Veeresh Kumar
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Alloy ◽  
Matrix Alloy ◽  
Mechanical Tests ◽  
Matrix Composites ◽  
Abrasive Resistance ◽  
Casting Technique

The Aluminum (Al) and its alloys are finding extensive applications in industries like automobile, aerospace and marine fields. Aluminum-based Metal Matrix Composites (MMC?s) reinforced with hard particulates offer superior operating performance and resistance to wear. Al based MMC materials provide higher abrasive resistance and provide a longer service life compared to other materials. The popularity of composites may be the reason that these composites possess good mechanical properties, good corrosion resistance, wear resistance in addition they are light-in-weight. In this paper it is aimed to present the experimental results of the studies conducted related to hardness, tensile strength, and compression strength of Al6061-Tungstan Carbide (WC) composites. The composites were prepared using the liquid metallurgy technique (stir casting technique), in which 0-4 wt. % of reinforcing tungsten carbide particulates were dispersed into the base matrix alloy in steps of 1%. The obtained cast composites of Al6061-WC and unreinforced base alloy was subjected mechanical tests and composites were subjected to microstructural examination. The test results reveal that the hardness and strength of the alloy has increased monotonically. The wear resistance obtained using computerized pin on disc wear tester with counter surface as EN31 steel disc (HRC60) and the composite pin as specimens, demonstrated the superior wear resistance property of the composites.

Performance of Drill String Hardfacings

1984 ◽  
Vol 106 (2) ◽  
pp. 278-281 ◽  
Author(s):  
J. S. Williamson ◽  
J. Bolton
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Tungsten Carbide ◽  
Drill String ◽  
Abrasive Wear Resistance ◽  
Experimental Results ◽  
Casing Wear ◽  
And Tungsten

Drill string hardfacings are composites of steel and tungsten carbide applied by welding techniques. This paper discusses the important variables involved and gives experimental results for casing wear and abrasive wear resistance.

scholarly journals Microstructure and Abrasive Wear Resistance of Metal Matrix Composite Coatings Deposited on Steel Grade AISI 4715 by Powder Plasma Transferred Arc Welding Part 2. Mechanical and Structural Properties of a Nickel-Based Alloy Surface Layer Reinforced with Particles of Tungsten Carbide and Synthetic Metal–Diamond Composite

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2805
Author(s):  
Artur Czupryński
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Abrasive Wear ◽  
Tungsten Carbide ◽  
Metal Matrix ◽  
Abrasive Wear Resistance ◽  
Spherical Particles ◽  
Hard Phase ◽  
Diamond Composite ◽  
Synthetic Metal

The article is the continuation of a cycle of works published in a Special Issue of MDPI entitled “Innovative Technologies and Materials for the Production of Mechanical, Thermal and Corrosion Wear-Resistant Surface Layers and Coatings” related to tests concerning the microstructure and mechanical properties of innovative surface layers made using the Powder Plasma Transferred Arc Welding (PPTAW) method and intended for work surfaces of drilling tools and machinery applied in the extraction industry. A layer subjected to tests was a metal matrix composite, made using powder based on a nickel alloy containing spherical fused tungsten carbide (SFTC) particles, which are fused tungsten carbide (FTC) particles and spherical particles of tungsten-coated synthetic metal–diamond composite (PD-W). The layer was deposited on the substrate of low-alloy structural steel grade AISI 4715. The results showed that the chemical composition of the metallic powder as well as the content of the hard phase constituting the matrix enabled the making of a powder filler material characterised by very good weldability and appropriate melting. It was also found that the structure of the Ni-WC-PD-W layer was complex and that proper claddings (characterised by the uniform distribution of tungsten carbide (WC)) were formed in relation to specific cladding process parameters. In addition, the structure of the composite layer revealed the partial thermal and structural decomposition of tungsten carbide, while the particles of the synthetic metal–diamond composite remained coherent. The deposited surface layer was characterised by favourable resistance to moderate dynamic impact loads with a potential energy of 200 J, yet at the same time, by over 12 times lower metal–mineral abrasive wear resistance than the previously tested surface layer made of cobalt-based composite powder, the matrix of which contained the hard phase composed of TiC particles and synthetic metal–diamond composite. The lower abrasive wear resistance could result from a different mechanism responsible for the hardening of the spherical particles of the hard phase susceptible to separation from the metal matrix, as well as from a different mechanism of tribological wear.

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