scholarly journals Regulation Features of Structure of Linear Block-Copolyurethane Composites of High Wear Resistance

2021 ◽  
Vol 15 (1) ◽  
pp. 33-39
Author(s):  
Volodymyr Anisimov ◽  
◽  
Volodymyr V. Anisimov ◽  
Keyword(s):  
Molecular Weight ◽  
Wear Resistance ◽  
Structural Parameters ◽  
High Wear Resistance ◽  
Complex Approach ◽  
Tribotechnical Characteristics ◽  
Linear Block

The influence of the main structural parameters (molecular weight and hard blocks content) as well as methods of filling linear block-polyurethanes and their compositions on their strength, deformation, rheological and tribotechnical characteristics has been studied. A complex approach to produce polyurethane compositions of improved wear resistance has been suggested.

scholarly journals Ultra-High-Molecular-Weight-Polyethylene (UHMWPE) as a Promising Polymer Material for Biomedical Applications: A Concise Review

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 323 ◽  
Author(s):  
Muzamil Hussain ◽  
Rizwan Ali Naqvi ◽  
Naseem Abbas ◽  
Shahzad Masood Khan ◽  
Saad Nawaz ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Wear Resistance ◽  
High Molecular Weight ◽  
Polymer Material ◽  
Biomedical Applications ◽  
Mechanical Performance ◽  
Surface Modifications ◽  
High Wear Resistance ◽  
Concise Review ◽  
Ultra High Molecular Weight

Ultra-High Molecular Weight Polyethylene (UHMWPE) is used in biomedical applications due to its high wear-resistance, ductility, and biocompatibility. A great deal of research in recent decades has focused on further improving its mechanical and tribological performances in order to provide durable implants in patients. Several methods, including irradiation, surface modifications, and reinforcements have been employed to improve the tribological and mechanical performance of UHMWPE. The effect of these modifications on tribological and mechanical performance was discussed in this review.

Tribotechnical properties of ultra-high molecular weight polyethylene filled with sulfur, diphenylguanidine and 2-mercaptobenzothiazole

2020 ◽  
pp. 91-98
Author(s):  
S. N. Danilova ◽  
A. A. Dyakonov ◽  
A. P. Vasiliev ◽  
Y. S. Gerasimova ◽  
A. A. Okhlopkova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Wear Resistance ◽  
Surface Layer ◽  
Ir Spectroscopy ◽  
High Molecular Weight ◽  
High Wear Resistance ◽  
Carbonyl Groups ◽  
Tribotechnical Properties ◽  
Ultra High Molecular Weight

The paper studies tribotechnical properties, hardness and density of composites based on ultra-high molecular weight polyethylene (UHMWPE) filled with sulfur, diphenylguanidine (DFG) and 2-mercaptobenzothiazole (MBT) and their mixtures. It has been established that the introduction of selected fillers has practically no effect on hardness and density of the composites, but leads to a significant (by 2–3 times) increase in the wear resistance of materials. Using electron microscopy, it has been established that secondary structures are formed in composites containing MBT that protect the surface layer of the material from wear. Using IR spectroscopy, it was established that tribochemical reactions occur during the wear of composites with the formation of hydroxyl and carbonyl groups. The developed materials UHMWPE / MBT and UHMWPE / FGD / MBT have high wear resistance and can be used as materials for tribological purposes.

LUCEFIN GROUP 16MnCr5 (1.7131), 16MnCrS5 (1.7139)

Alloy Digest ◽  
2020 ◽  
Vol 69 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Fatigue Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Medium Size ◽  
Case Hardening ◽  
Low Carbon

Abstract Lucefin Group 16MnCr5 and 16MnCrS5 are low-carbon, 1.2Mn-1Cr, alloy case-hardening steels that are used in the carburized or carbonitrided, and subsequently quench hardened and tempered condition. In general, these steels are used for small and medium size parts requiring high wear resistance and fatigue strength. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-864. Producer or Source: Lucefin S.p.A.

AIR-4

Alloy Digest ◽  
1963 ◽  
Vol 12 (2) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Bethlehem Steel Corporation ◽  
Steel Corporation ◽  
Machining Characteristics

Abstract BETHLEHEM AIR-4 is a medium alloy air-hardening tool steel having low deformation, high wear resistance and hardness, deep hardening properties and adequate toughness for severe service. It has excellent free-machining characteristics. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-129. Producer or source: Bethlehem Steel Corporation.

BÖHLER M261 EXTRA

Alloy Digest ◽  
2015 ◽  
Vol 64 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Compressive Stress ◽  
Precipitation Hardening ◽  
Heat Treating ◽  
Steel Grade ◽  
High Wear Resistance ◽  
Hardened Condition

Abstract Böhler (or Boehler) M261 Extra is a precipitation hardening steel grade for plastic molds with good machinability in the precipitation hardened condition. It is used in the processing of plastics by offering high compressive stress and high wear resistance. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-732. Producer or source: Böhler Edelstahl GmbH & Company KG. See also Alloy Digest TS-736, September 2016.

YSS HAP72

Alloy Digest ◽  
2019 ◽  
Vol 68 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Tool Steel ◽  
High Speed ◽  
High Wear Resistance ◽  
Bend Strength ◽  
Temperature Performance ◽  
Very High

Abstract YSS HAP72 is a powder metallurgy high-speed tool steel with a very high wear resistance. This datasheet provides information on composition, hardness, and bend strength. It also includes information on high temperature performance. Filing Code: TS-779. Producer or source: Hitachi Metals America Ltd.

FINKL WF-XTRA

Alloy Digest ◽  
2000 ◽  
Vol 49 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Optimum Diameter ◽  
High Production ◽  
Operating Temperatures

Abstract Finkl WF-XTRA has high wear resistance while retaining moderate fracture toughness. The alloy is recommended for larger die blocks. The optimum diameter for hardenability is 838 mm (33 in.). It is appropriate for use in high-production hammers where die temperatures may be above average or in presses with moderately high operating temperatures. This datasheet provides information on composition, microstructure, hardness, and tensile properties as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: TS-570. Producer or source: A. Finkl & Sons Company.

Effect of cluster-gradient architecture of nanostructured topocomposites on features of tribointeraction with heterophased material

2020 ◽  
pp. 130-135
Author(s):  
D.N. Korotaev ◽  
K.N. Poleshchenko ◽  
E.N. Eremin ◽  
E.E. Tarasov
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Energy Dissipation ◽  
Phase Structure ◽  
Diffusion Processes ◽  
Structural Phase ◽  
High Wear Resistance ◽  
Wear Characteristics ◽  
And Diffusion

The wear resistance and wear characteristics of cluster-gradient architecture (CGA) nanostructured topocomposites are studied. The specifics of tribocontact interaction under microcutting conditions is considered. The reasons for retention of high wear resistance of this class of nanostructured topocomposites are studied. The mechanisms of energy dissipation from the tribocontact zone, due to the nanogeometry and the structural-phase structure of CGA topocomposites are analyzed. The role of triboactivated deformation and diffusion processes in providing increased wear resistance of carbide-based topocomposites is shown. They are tested under the conditions of blade processing of heat-resistant titanium alloy.

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