Water Lubricated Bearing Molding Technology Impact on Bearing Bush Material Performance

2011 ◽  
Vol 382 ◽  
pp. 408-413
Author(s):  
Jin Min Peng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Production Process ◽  
Induction Period ◽  
Bearing Material ◽  
Molding Temperature ◽  
Time Points ◽  
And Performance

Water lubricated plastic alloy bearing molding technology determines the mechanical properties and performance of the product. The influence of molding temperature and time are significant on the performance of water lubricated bearing. The experiment selected five vulcanization temperatures from 110°C-190°C, and five time points from 5-25min to assess their influence on the tensile strength, stretching strength and abradability of bearing material. The corelation between temperature and time is analyzed and a vulcanization curve of plastic alloy production in the situation of 170°C (vulcanization temperature), 2Mpa (vulcanization pressure). The curve realizes a long vulcanization induction period at a fast vulcanization speed with a broad vulcanization plateau that reduces the vulcanization time in the production process and enhances efficiency massively.

scholarly journals The potential use of lightweight cellular concrete in pavement application: a review

2020 ◽  
Vol 13 (6) ◽  
pp. 686-696
Author(s):  
Frank Mi-Way Ni ◽  
Abimbola Grace Oyeyi ◽  
Susan Tighe
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ease Of Use ◽  
Potential Candidate ◽  
Actual Performance ◽  
Freeze Thaw ◽  
Lower Weight ◽  
And Performance ◽  
Potential Use ◽  
Cellular Concrete

AbstractProtecting the pavement subgrade to increase the service life of road pavements is an aspect currently being explored. Several alternative pavement subbase materials are being considered, including Lightweight Cellular Concrete (LCC). Due to its lower weight, LCC incorporating industrial by-product, making it sustainable, and ease of use amongst other benefits, is seen as a potential candidate. This paper reports reviewing the potential application of LCC within the pavement structure with a specific application as a subbase. It examines the various properties such as modulus of elasticity, compressive and tensile strength, Water absorption, and freeze-thaw resistance necessary for pavement application. It also assesses its use in the field in Canada considering the design methods utilized. Some limitations and gaps for LCC application in pavements are also established and recommendations on how to further its use and performance. This review concludes that LCC possesses potential as a pavement subbase alternative; however, other mechanical properties like LCC’s fatigue life is essential. A comparative field study is also recommended to monitor actual performance and various factors on performance.

Affection of Manufacture Parameters and Mixture Material on Plastic Alloy Bearings

2012 ◽  
Vol 164 ◽  
pp. 37-41
Author(s):  
Cheng Yun Yang ◽  
Jin Min Peng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Process Parameters ◽  
Peel Strength ◽  
Manufacture Process ◽  
Orthogonal Experiments ◽  
And Performance ◽  
Orthogonal Tests ◽  
Tearing Strength ◽  
Optimal Formula

Manufacture process parameters will be obtained from experiments in research. Molding technology determines the mechanical properties and performance of the product. The influence of molding temperature and time are significant on the performance of water lubricated bearing, the plastic alloy is based on latex material, synthesized with different fillings, accelerators and other matters, and displays great mechanical and friction properties. The main performance included peel strength, tensile strength and wearing capacity. Optimization of manufacture process parameters and the orthogonal experiments on them were carried out by integrating the results of experiments and finally the optimal manufacture process was achieved. In the experiment, three-leveled orthogonal tests were conducted for the three systems to test the tensile strength, tearing strength, stress at definite elongation, hardness and tensile rate. The impacts of the respective systems were analyzed and the content of each component are determined to get the optimal formula.

Effect of over Tempering at UHSLA Steel ARMOX 500

2014 ◽  
Vol 875-877 ◽  
pp. 1324-1328
Author(s):  
Igor Barényi ◽  
Peter Lipták ◽  
Sergej Vojtovič
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Production Process ◽  
High Hardness ◽  
Specific Production ◽  
Cooling Process ◽  
Secondary Processing ◽  
Degradation Of Mechanical Properties ◽  
Quenching And Tempering

ARMOX steels are armored steels used for protect devices and facilities against blasts and explosions. Due to this purpose the ARMOX 500 steel has excellent mechanical properties as are high hardness, tensile strength and good toughness. These properties result from specific production process finished with rolling ant then quenching and tempering. The producer of ARMOX steels recommend their secondary processing (cutting, welding, shaping) at temperatures lower than 200°C due to over tempering and degradation of mechanical properties in heat affected areas. The paper describes the mechanism and reason of this degradation including the simulation of cooling process with ARMOX 500 steel.

scholarly journals The effect of changing injection temperature on some mechanical and morphological properties for polypropylene material (PP)

2019 ◽  
Vol 24 (24) ◽  
pp. 20-24
Author(s):  
Ali Al-Zubiedy ◽  
Ruaa M. Muneer
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Injection Molding ◽  
Physical And Mechanical Properties ◽  
Surface Damage ◽  
Morphological Properties ◽  
Sem Images ◽  
Molding Temperature ◽  
Operation Temperature ◽  
Injection Temperature

Abstract This is a study of a medical injection factory-Babylon carried out in order to achieve proper mechanical and morphological properties, PP has been injection molded by using cold runner injection molding machine with temperature variation (198, 200, 203……220°C) for ten samples. The physical and mechanical properties of PP product were examined. It has been found that the Shore hardness decreases linearly with injection molding temperature increasing. The tensile strength has a similar behavior to the hardness. However, it has been found that the MIF (Melt Index Flow) rates increases with the increase of injection molding temperature. The density of PP has been found for both virgin PP and the samples, it has been found that the density decreases with increasing operation temperature. FTIR (Fourier Transmission Infrared) spectra were taken for both samples with high and low operation temperature. Besides the SEM (Scanning Electronic Microscopy) test shows the difference in the morphology of the product surface and the PP product at high and low operation temperature. Moreover, for all these properties, the PP product exhibits good mechanical properties (hardness, tensile strength, density) for the samples produced at temperature lower than 207°C. While the physical properties such as MIF improved with injection temperature increasing, additionally, the SEM images show that the sample produced in low temperature have surface damage.

scholarly journals Determination of the Tensile Properties and Biodegradability of Cornstarch-Based Biopolymers Plasticized with Sorbitol and Glycerol

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3709
Author(s):  
M. M. Harussani ◽  
S. M. Sapuan ◽  
A. H. M. Firdaus ◽  
Yaser A. El-Badry ◽  
Enas E. Hussein ◽  
...  
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Food Packaging ◽  
Young's Modulus ◽  
Casting Process ◽  
Biodegradable Materials ◽  
And Performance

In this study, the effects of various quantities of sorbitol and glycerol plasticizers (0%, 30%, 45%, and 60%) on cornstarch-based film were examined to develop a novel polymer for usage with biodegradable materials. The film was prepared using the casting process. According to the test findings, the application of the plasticizer concentrations affected the thickness, moisture content, and water absorption of the film. When plasticizer concentrations were increased to 60%, the tensile stress and Young’s modulus of plasticized films dropped regardless of plasticizer type. However, the thin film with addition of 30% sorbitol plasticizer demonstrated a steady value of Young’s modulus (60.17 MPa) with an increase in tensile strength (13.61 MPa) of 46%, while the lowest combination of tensile strength and Young’s modulus is the film that was plasticized with 60% glycerol, with 2.33 MPa and 16.23 MPa, respectively. In summary, the properties and performance of cornstarch-based film were greatly influenced by plasticizer types and concentrations. The finest set of features in this research appeared in the film plasticized with 30% sorbitol, which achieved the best mechanical properties for food packaging applications.

Influence of Electromagnetic Force on Solidification of Cu-Cr-Zr Alloy

2015 ◽  
Vol 817 ◽  
pp. 545-549 ◽  
Author(s):  
Wen Bin Wang ◽  
Lin Zhang ◽  
Chong Luo ◽  
En Gang Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electromagnetic Force ◽  
Experimental Results ◽  
Electromagnetic Stirring ◽  
Second Phase ◽  
And Performance ◽  
Zr Alloy ◽  
Zr Alloys

In order to improve the distribution of second phase and performance the Cu-Cr-Zr alloy was processed by solidification under the effect of electromagnetic stirring (EMS) and in situ drawing deformation. Study of Cu-Cr-Zr conductivity and mechanical properties under different deformation strains was also carried out, to analyze the effect of EMS on Cu-Cr-Zr alloys. The experimental results showed that the Cr dendrites tended to be smaller and shorter in Cu-10Cr-0.1Zr alloy solidified with EMS (16Hz, 100A). Since electromagnetic stirring have the role to break dendrite,it’s beneficial to increase the amount of dendrites and decrease the size of dendrites. The tensile strength of Cu-10Cr-0.1Zr wire solidified with EMS was higher than that solidified without EMS.

Effect of Nd on the Microstructure and Mechanical Properties of High Aluminum Zinc-Based Alloy

2011 ◽  
Vol 391-392 ◽  
pp. 564-568
Author(s):  
Ai Li Wei ◽  
Kun Yu Zhang ◽  
Xian Rong Li ◽  
Wei Liang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elevated Temperatures ◽  
Grain Refining ◽  
Micro Hardness ◽  
Microstructure And Mechanical Properties ◽  
Hardness Tests ◽  
And Performance ◽  
Microstructure And Performance ◽  
High Aluminum

This work mainly investigated the influence of element Nd on the microstructure and mechanical properties of the Zn-25Al-5Mg-2.5Si alloys with different Nd contents. The tensile and hardness tests were carried out at room and elevated temperatures. The results show that the addition of element Nd leads to the grain refining and the formation of Al2Nd and NdZn2 phases in the microstructure, and the mechanical properties of the alloys rise at first and then drop with the increasing of Nd content. The optimization of microstructure and performance especially the tensile strength at high temperature is obtained when Nd content is 0.8 wt.%. It can result in increase of tensile strength by 48.8% and micro-hardness by 67.4% at 180。C.

Effects of Si on Structure and Properties of Mg-Sn Alloy

2013 ◽  
Vol 320 ◽  
pp. 303-307 ◽  
Author(s):  
Hao Ran Geng ◽  
Peng Liu ◽  
Hua Wei Jiang ◽  
Bo Teng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Testing ◽  
Chinese Character ◽  
Cast Alloy ◽  
Grain Refining ◽  
Structure And Properties ◽  
And Performance ◽  
Si Content ◽  
Si Addition

Magnesium alloys are becoming ever more prevalent in automotive and aerospace industries as energy conservation and performance demands increase. However, it is limited on further application in the automotive field for its low strength compared with steel and aluminum alloys. Effects of Si addition on microstructure and mechanical properties of as-cast Mg-5%Sn magnesium alloy were also studied using SEM, XRD and tensile testing. The results show that the phases of as-cast alloy are composed of α-Mg, Mg2Sn; Mg2Si. The addition of Si suppresses the precipitation of the Mg2Sn, Product Chinese character shape phases of Mg2Si. With the increase of Si content, the effect becomes more apparent. When Si content is up to 1.25wt%, the grain refining effect reached best level. The average alloy grain size reduced from 90μm to 30μm, the tensile strength is the highest. The average tensile strength increased from 128 MPa to 156 MPa. When the Si added at 1.25wt% or less, the hardness and strength were improved with the increase of Si. When 1.25% Si was added, grain did not become further refinement. While Si content was continue to be increase, the tensile strength decreased.

scholarly journals Investigation of Wood Flour Size, Aspect Ratios, and Injection Molding Temperature on Mechanical Properties of Wood Flour/Polyethylene Composites

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3406
Author(s):  
Mohammad E. Golmakani ◽  
Tomasz Wiczenbach ◽  
Mohammad Malikan ◽  
Reza Aliakbari ◽  
Victor A. Eremeyev
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Injection Molding ◽  
Polymer Composites ◽  
Impact Energy ◽  
Wood Flour ◽  
Impact Testing ◽  
Molding Temperature ◽  
Aspect Ratios

In the present research, wood flour reinforced polyethylene polymer composites with a coupling agent were prepared by injection molding. The effects of wood flour size, aspect ratios, and mold injection temperature on the composites’ mechanical properties were investigated. For the preparation of the polymer composites, five different formulations were created. The mechanical properties including tensile strength and the modulus, flexural strength and the modulus, and impact energy were measured. To investigate the changes in the properties resulting from different compositions, mechanical static and impact testing was performed. The obtained results indicate that by reducing the flour size, the tensile strength and modulus, flexural strength, and impact energy were reduced. In contrast, the flexural modulus increased. Furthermore, with the increment of injection molding temperature, the tensile strength and the modulus and the impact energy of the specimens were reduced. On the other hand, the flexural strength and the modulus increased. Thus, an optimized amount of injection molding temperature can provide improvements in the mechanical properties of the composite.

Study on the Structure and Performance of the Large Diameter PPS/PA6 Blending Monofilaments

2011 ◽  
Vol 233-235 ◽  
pp. 1694-1699
Author(s):  
Hai Yan Ma ◽  
Zhao Feng Liu ◽  
Jun Zhang ◽  
Hai Jun Ma
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Comparative Analysis ◽  
Large Diameter ◽  
Acid Resistance ◽  
Alkali Resistance ◽  
Acid And Alkali Resistance ◽  
And Performance

PPS and PA6were blended to improve the mechanical properties of the large diameter PPS monofilaments. The influence of the structure of the blends on the blending monofilaments, the comparative analysis with relevant polymer monofilaments and the acid and alkali resistance were studied in this article. The results demonstrated that: the mechanical properties of the PPS monofilaments were improved. The tensile strength and the collaboration strength of the monofilaments increased. The toughness of the PPS monofilaments increased. Simultaneously, the acid resistance and the alkali resistance of the PPS monofilaments were retained in the PPS/PA6blending monofilaments.

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