Studies of the Influence of High Temperatures and Aggressive Media on the Performance Properties of O-Rings Used in the Automotive Industry

2021 ◽  
Vol 410 ◽  
pp. 587-592
Author(s):  
Gulgena D. Shakirova ◽  
Natalya V. Romanova ◽  
Lenar N. Shafigullin
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
High Temperatures ◽  
Automotive Industry ◽  
High Heat ◽  
High Heat Resistance ◽  
Performance Properties ◽  
Air Atmosphere ◽  
Heat Stable ◽  
Fluorosilicone Rubber

The paper provides the results of the studies on the influence of high temperatures and aggressive media on the performance properties of O-rings having one name but made by different manufacturers. O-rings by supplier No. 1 are made from fluorosilicone rubber, and O-rings by supplier No. 2 are made from fluororubber. The analysis of O-rings showed that the color of O-rings made from fluorosilicone rubber changed and their physical mechanical properties decreased after operation when subjected to G-energy Si-OAT and G-energy SNF coolants. The comparative analysis of TGA curves of O-rings showed that O-rings made from fluororubber were more heat stable than O-rings made from fluorosilicone rubber, i.e. they can withstand higher operating temperatures in an air atmosphere. Fluoroelastomers can recover quickly and are used to manufacture products which should have a high heat resistance during operation and high resistance to aggressive coolants.

The Effect of the Deformation Method of the Billets on Mechanical Properties of Molybdenum Bars and Wire

2020 ◽  
Vol 864 ◽  
pp. 204-210
Author(s):  
Sergey Gorbatyuk ◽  
Dmitry Efremov ◽  
Sergei Albul ◽  
Natalya Kirillova
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
High Temperatures ◽  
Rolling Mill ◽  
Mechanical Characteristics ◽  
New Technology ◽  
Deformation Resistance ◽  
Helical Rolling ◽  
Deformation Method ◽  
High Deformation

A procedure has been developed for calculating the geometric, kinematic and energy-power parameters of helical rolling, which allows a comparative analysis of the processes carried out in stands of various designs. Based on the results of this analysis, a helical rolling mill was designed and manufactured which allows to roll materials with high deformation resistance at high temperatures. The results of the study of the mechanical characteristics of molybdenum bars and wires made by new technology are presented.

Mechanical Properties of Large-Scale Extruded Mg-Zn-Y Alloys

2010 ◽  
Vol 638-642 ◽  
pp. 1541-1545 ◽  
Author(s):  
Yuichi Ienaga
Keyword(s):  
Mechanical Properties ◽  
Fatigue Strength ◽  
Aluminum Alloys ◽  
Large Scale ◽  
High Strength ◽  
Casting Process ◽  
High Heat ◽  
Stir Casting ◽  
Extrusion Ratio ◽  
High Heat Resistance

In order to realize large-scale Mg-Zn-Y alloys with high strength and high heat resistance, we have developed a unique casting process to produce a large homogeneous ingot investigating the mechanical properties of the extruded alloys. First homogeneous ingots (335 mm x 850 mm) were prepared by a unique stir casting process. Then large-scale extruded alloys (100 mm) were prepared at 648 K with the extrusion ratio of 10. The Mg-Zn-Y alloys have exhibited higher yield and fatigue strengths than those of aluminum alloys. The yield strengths of the aluminum alloys have decreased drastically above 473 K, whereas those of the Mg-Zn-Y alloys have not. It is noteworthy that the yield strength (200 MPa) and the fatigue strength (75 MPa) of the Mg-Zn-Y alloys at 523 K are about twice and 1.2-1.4 times as high as those of the aluminum alloys respectively. Moreover, the creep strengths have been equivalent or higher than those of aluminum alloys. From the above results, we have verified that even being made by the large-scale extrusion, the Mg-Zn-Y alloys possess higher strength than those of heat resistant aluminum alloys.

scholarly journals Simulation of Physical and Mechanical Properties to Increase the Strength of the Cutting Ceramics

2018 ◽  
Vol 7 (4.38) ◽  
pp. 1193
Author(s):  
Alexey A. Moskvitin ◽  
Lyubov A. Gorovenko ◽  
Evgenia V. Kovriga ◽  
Olga A. Sumskaya ◽  
Akop S. Abelyan
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Heat Resistance ◽  
Cutting Tools ◽  
Physical And Mechanical Properties ◽  
High Heat ◽  
High Heat Resistance ◽  
Alloying Element ◽  
Cutting Ceramics

According to studies [1], cutting tools with plates made of cutting ceramics alloyed with carbide-forming elements have higher heat resistance than standard plates made of cutting ceramics in the delivery stage, since their properties do not meet the requirements. Cutting ceramics with the addition of a nickel alloying element to its main standard fraction has a low heat resistance. With the addition of the manganese alloying element, heat resistance and corrosion resistance and wear resistance of cutting tools equipped with cutting ceramics are reduced. The main alloying element is chromium, which, depending on its quantity, indicates increased or high heat resistance in cutting ceramics.  

Simultaneously achieving superior foldability, mechanical strength and toughness for transparent healable polysiloxane films through building hierarchical crosslinked networks and dual dynamic bonds

2018 ◽  
Vol 6 (46) ◽  
pp. 23425-23434 ◽  
Author(s):  
Youhao Zhang ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Mechanical Properties ◽  
Heat Resistance ◽  
Mechanical Strength ◽  
High Heat ◽  
Self Healing ◽  
High Heat Resistance ◽  
Superior Mechanical Properties ◽  
Crosslinked Networks ◽  
Strength And Toughness

Novel transparent and foldable polysiloxane films simultaneously showing superior mechanical properties, repeatable self-healing ability and high heat-resistance have been developed.

scholarly journals Effect of Y Addition on the Microstructure and Mechanical Properties of ZM31 Alloy

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 583 ◽  
Author(s):  
Xue Ye ◽  
Hongshuai Cao ◽  
Fugang Qi ◽  
Xiaoping Ouyang ◽  
Zhisong Ye ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Phase I ◽  
Hot Extrusion ◽  
High Heat ◽  
Dispersion Strengthening ◽  
Lpso Phase ◽  
Fine Grain ◽  
Heat Stable ◽  
Second Phases

Effects of different Y contents (0, 0.3, 0.7, 1.5, 3, 5 and 10 wt.%) on the microstructure, thermal stability and mechanical properties of Mg-3Zn-1Mn (ZM31) alloys were systematically studied. The existence form and action mechanism of Y in the experimental alloys were investigated. The results revealed that with the change of Y content, the main phases of the ZM31-xY alloys changed from Mg7Zn3 phase, I-phase, I + W-phase, W-phase, W + LPSO phase to LPSO phase. When Y content was low (≤1.5%), hot extrusion could break up the residual phases after homogenization to form dispersed fine rare-earth phase particles, and fine second phases would also precipitate in the grain, which could inhibit the grain growth. When Y content was high (≥3%), the experimental alloys were only suitable for high-temperature extrusion due to the formation of the high heat stable rare-earth LPSO phase. In addition, Y could evidently enhance the mechanical properties of the as-extruded ZM31 alloy, of which the ZM31-10Y alloy had the best mechanical properties, that is, the tensile and yield strengths are 403 MPa and 342 MPa. The high strengths of the alloys were mainly determined by fine grain strengthening, rare-earth phase strengthening and dispersion strengthening of fine α-Mn particles.

scholarly journals THE INVESTIGATION ON THERMAL OXIDATIVE DESTRUCTION AND ASSESSMENT OF RUBBER SERVICE PERIOD BASED ON TRIPLE COPOLYMER OF TETRAFLUOROETHYLENE, VINYLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE

2020 ◽  
pp. 113-117
Author(s):  
I. M. Baev ◽  
T. V. Sclyarova ◽  
S. V. Borisov ◽  
I. M. Gres ◽  
M. A. Vaniev
Keyword(s):  
Vinylidene Fluoride ◽  
Arrhenius Equation ◽  
Oxidative Degradation ◽  
High Heat ◽  
Thermal Oxidative Degradation ◽  
Oxidative Destruction ◽  
High Heat Resistance ◽  
Air Atmosphere ◽  
Service Period ◽  
Thermal Oxidative Destruction

By thermogravimetric analysis it was studied the thermal oxidative degradation of rubber based on a triple copolymer of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene. It was found that the object is characterized by a sufficiently high heat resistance, which is proven by the rather high temperature of loss of 5% of the initial mass of the sample (412 ° C). The service life of the tested unloaded material in air atmosphere, according to the Arrhenius equation, is 2084, 450 and 107 days at the temperature of 185, 200 and 215 ° C respectively.

Effects of Blowing Ar on Inclusion and Properties of AZ61 Magnesium Alloy

2016 ◽  
Vol 725 ◽  
pp. 416-420 ◽  
Author(s):  
Yan Qing Lu ◽  
Xue Jin Zhu ◽  
Xiao Dong Hu ◽  
Yao Yao ◽  
Han Cai
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
High Heat ◽  
Low Density ◽  
Light Weight ◽  
High Heat Resistance ◽  
Micro Structure ◽  
Mixed Gas ◽  
Inclusion Removal ◽  
Az61 Magnesium Alloy

Magnesium alloys have low density, light weight, strength, stiffness, high heat resistance, good shock absorption, convenient recycling use and other characteristics, which make it have the potential of widely using in aerospace, transportation, weapons, 3C products and other fields. AZ61 magnesium alloy melt was purified by using composite refining technology. The AZ61 micro-structure and mechanical properties were studied after casting, rolling and annealing. Using SF6 and Ar mixed gas to protect melting AZ61 magnesium alloy, the effect was good, and size of inclusion was all blow 50μm. The effect of blowing Ar on inclusion removal was obviously. The inclusion contents were decreased from an initial 1.37% to a final 0.58%. Alloy elongation was increased obviously, which was from an initial 4.02% to a final 7.09%.

PRESSURDIE-1

Alloy Digest ◽  
1967 ◽  
Vol 16 (4) ◽  
Keyword(s):  
High Temperature ◽  
Die Casting ◽  
Heat Treating ◽  
High Heat ◽  
Strength Properties ◽  
High Temperature Strength ◽  
High Heat Resistance ◽  
Die Steel ◽  
Temperature Performance ◽  
Steel Industries

Abstract PRESSURDIE-1 is an air-hardening hot work tool and die steel having high heat resistance and good high temperature strength properties. It is recommended for die casting dies, extrusion and forging dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-191. Producer or source: Continental Copper & Steel Industries Inc..

PEERLESS LCT2

Alloy Digest ◽  
1963 ◽  
Vol 12 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
High Heat ◽  
High Heat Resistance ◽  
Steel Company ◽  
Temperature Performance ◽  
Crucible Steel ◽  
High Degree

Abstract PEERLESS LCT2 is a hot work steel which possesses high heat resistance and a high degree of working hardness at elevated temperatures. This steel is best applied where hardness and resistance to abrasion are of more importance than toughness. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-140. Producer or source: Crucible Steel Company of America.

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