Wear Resistance of Bronze-Matrix Samples of Diamond Tubular Drills with Ultrafine Diamond and Molybdenum Powder Reinforcement

2020 ◽  
Vol 58 (9-10) ◽  
pp. 608-612
Author(s):  
V.P. Umansky ◽  
N.P. Brodnikovsky ◽  
O.A. Bashchenko ◽  
A.S. Kulakov
Keyword(s):  
Wear Resistance ◽  
Molybdenum Powder ◽  
Ultrafine Diamond ◽  
Bronze Matrix

Development of Bronze Metal Matrix Composite for Automobile and Marine Applications

2019 ◽  
Vol 969 ◽  
pp. 415-420 ◽  
Author(s):  
Rohit U. Krishnan ◽  
Jithin Mohan ◽  
George Alex ◽  
J.P. Arjun ◽  
K.U. Dev Darshan ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Tensile Properties ◽  
Metal Matrix ◽  
Optical Microscope ◽  
Bronze Alloy ◽  
Marine Applications ◽  
Relevant Material ◽  
Bronze Matrix ◽  
Composite Samples

Bronze, an industrially relevant material, is always at a constant need for improvement in its properties. It should possess superior hardness, wear resistance and high tensile properties. The microstructure of the composite was characterized by using an optical microscope. The mechanical and tribological tests were carried out on the developed composite samples as per ASTM standards. It was observed that the hardness of the developed bronze composite increases with an increase in the reinforcement addition. The tensile properties were found to improve with addition of reinforcement particles into bronze matrix but, there observed a decrease in the ductility of the composite as compared to the regular bronze alloy. The wear rate of the developed composite was found to be low as compared to that of the regular bronze alloy

Microstructure and Properties of Mo-Based Composites Reinforced by Al2O3

2011 ◽  
Vol 120 ◽  
pp. 467-470 ◽  
Author(s):  
Shi Zhong Wei ◽  
Liu Jie Xu ◽  
Guo Shang Zhang ◽  
Ji Wen Li ◽  
Bao Zhu Dai
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Ball Mill ◽  
Raw Materials ◽  
Alumina Content ◽  
Wear Property ◽  
Molybdenum Powder ◽  
Micro Hardness ◽  
Molybdenum Alloys ◽  
Worn Surface

Mo-based composites with Al2O3 particles were developed in order to enhance the wear resistance of molybdenum alloys. Using Al2O3 power and pure Mo power as raw materials, the Molybdenum powders mixed with Al2O3 particles were prepared using planetary ball mill. And then the Mo-based composites with 3-10vol.% Alumina were prepared by compaction and sintering at 1840°C. The morphology of the Molybdenum powder and microstructure of the composites were analyzed by SEM and XRD. The micro-hardness, density and wear property of composites were researched. The results show that the microstructure of composites is composed of α-Al2O3 particles and Molybdenum matrix. With the increase of Alumina content, the microhardness of Molybdenum matrix increases, and the density first increases and then decreases. The friction coefficient of composite is scarcely affected by the alumina content. While the wear resistance of the composites rises with the increase of Alumina content. The wear failure is caused by abrasive wear characterized by obvious plow furrow and abrasive dust on the worn surface.

ULTRA-DISPERSED ADDITIVES IN THE NICKEL COLLOID-ELECTROLYTE BATHS

2020 ◽  
Author(s):  
L.A. Degtyar ◽  
◽  
I.N. Tyaglivaya ◽  
K.V. Ovchinnikova ◽  
A.A. Kuts ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Zirconium Diboride ◽  
Internal Stresses ◽  
Agricultural Machinery ◽  
Nickel Coatings ◽  
Ultrafine Diamond ◽  
Optimal Values

The article presents the results of investigates of the effect of ultrafine additives - zirconium diboride, silicon carbide, diamond on the physic-mechanical properties of composite electrochemical nickel coatings obtained from colloid-electrolyte baths. It is shown that precipitation containing ultrafine diamond possess optimal values of microhardness, wear resistance and internal stresses. These coatings can be used as an alternative to chrome coatings on parts of agricultural machinery.

Experimental Investigation and Optimization of Dry Sliding Wear Parameters on Solid Lubricant Reinforced Bronze Matrix Composites - A Taguchi Approach

2016 ◽  
Vol 852 ◽  
pp. 435-445 ◽  
Author(s):  
P. Sangaravadivel ◽  
N. Natarajan ◽  
V. Krishnaraj
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Sliding Wear ◽  
Solid Lubricant ◽  
Volume Fraction ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Matrix Composites ◽  
Parameter Values ◽  
Bronze Matrix

This present study aims to investigate the dry sliding wear behaviour of tungsten disulfide (WS2) particle reinforced bronze matrix composite against surface hardened steel and to discover the optimum wear parameter values such as applied load, sliding distance, sliding velocity and volume fraction of reinforcement to reduce the specific wear rate. The composite specimens were fabricated by liquid metallurgy route by varying the volume fraction of solid lubricant particles and prepared as per American Society for Testing of Materials (ASTM) G99-95. The experiments were carried out based on Taguchi design of experiments technique with L27 orthogonal array. The wear tests were conducted in pin-on disc wear testing machine for different loads - 20N, 40N and 60N, sliding velocities - 2.09m/s, 2.62 m/s and 3.14m/s and sliding distances of 600m, 1200m and 1800m in unlubricated conditions. The significant influence of wear parameters on sliding wear, interactions and optimum combination of wear parameter values to minimize the wear rate were obtained by signal-to-noise (S/N) ratio and analysis of variance (ANOVA). The results demonstrated that inclusion of tungsten disulfide particles decreased the wear rate of bronze and also the increases in amount of secondary phase increase the wear resistance of composites. The effect of solid lubricant particle on interfacial temperature was also studied and reported. It was found that percentage of solid lubricant and load are the most significant factors influencing the friction and wear properties of composites. The results revealed that, WS2 particle reinforced bronze matrix composites were the potential component can be replaced for pure bronze products in wear resistance applications.

The effects of β-Si3N4 whiskers and Fe–Cr–C alloy on the tribological properties of bronze matrix composites

2020 ◽  
pp. 135065012092980
Author(s):  
Jiaming Pan ◽  
Jinwei Yin ◽  
Yongfeng Xia ◽  
Dongxu Yao ◽  
Hanqin Liang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Interfacial Bonding ◽  
Matrix Composites ◽  
Friction Performance ◽  
Coefficient Stability ◽  
Bronze Matrix ◽  
Properties Of Composites

In order to improve the wear resistance, Fe–Cr–C alloy and β-Si3N4 whiskers were chosen as the hard phases in bronze-graphite to prepare self-lubricating composite. Friction behaviors were tested with counter material 45# steel to evaluate the tribological properties of composites. The results indicated that Fe–Cr–C alloy and β-Si3N4 whiskers played different roles in composites. β-Si3N4 whiskers can obviously decrease the wear rate by excellent wear resistance. While the Fe–Cr–C alloy had better wettability with matrix, which improved the interfacial bonding and provided a continuous wear resistance. Moreover, Fe–Cr–C alloy also played a role in maintaining the friction coefficient stability, and this effect was more significant in the conditions of high rotational speeds. The composite containing 12.5 vol.% β-Si3N4 whiskers and 2.5 vol.% Fe–Cr–C alloy in this research showed good friction performance.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Abrasive wear of polymer/steel gear drives

2008 ◽  
Vol 4 (1) ◽  
pp. 1-26
Author(s):  
Gábor Kalácska
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Material Selection ◽  
Solid Particles ◽  
Soil Types ◽  
General View ◽  
Modern Engineering ◽  
Clean Environment ◽  
Engineering Polymers ◽  
Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

Comparative high-temperature wear resistance of CHS88U-VI alloy and H30N50YU5T2 satellite

2014 ◽  
Vol 0 (4) ◽  
Author(s):  
Oleksandr M. Kostin ◽  
Anastasiia Yu. Butenko ◽  
Volodymyr O. Martynenko
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
High Temperature Wear

Tempering and wear resistance of laser cladded MMC coating for corrugated rollers

2007 ◽  
Author(s):  
Zhaoyong Qian ◽  
Minlin Zhong ◽  
Wenjin Liu ◽  
Dongye Zhang ◽  
Ruiquan Kang
Keyword(s):  
Wear Resistance

INCREASING THE WEAR RESISTANCE OF ELEMENTS AND COMPONENTS OF FORGING AND STAMPING EQUIPMENT (FOR EXAMPLE, PERFORMING SEPARATION OPERATIONS)

2020 ◽  
Author(s):  
K.O. Kobzev ◽  
◽  
S.A. Vyalov ◽  
E.S Bozhko ◽  
I.A. Zolotuhina ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Technological Capabilities ◽  
Recoil Force ◽  
The Press ◽  
Strength And Durability

The article describes the possibilities of increasing the durability of crank presses. The influence of the main parameters of the press on the value of the recoil force was studied. Based on the analysis of this topic, the types of expansion of technological capabilities of crank presses and their strength and durability were summarized.

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