Friction and Wear Behavior of 45# Steel with Different Plant Abrasive
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The wear behavior of different plant abrasive to 45# steel was studied by using an abrasive rubber wheel tester. The worn surface of the frictional samples morphology was observed by using Scanning Electron Microscopy, and the wearing mechanism of different abrasive to 45# steel was analyzed. The results show that: on the experiment conditions, the wear loss from big to small is alfalfa abrasive, corn abrasive and wheat abrasive, and the wear rules of corn abrasive and wheat abrasive are similar, but the wear loss of alfalfa abrasive is much higher than the former two. The wear dominant mechanism of the wheat abrasive to 45# steel is mechanical polishing, the wear dominant mechanism of the corn abrasive to 45# steel is mechanical polishing and adhesive wear, the wear dominant mechanism of the alfalfa abrasive to 45#steel is micro-cutting and adhesive wear.Keywords:
Adhesive wear
Single-crystal sapphire (α-Al2O3) is an important material and widely used in many advanced fields. The semi-fixed abrasive grain processing method based on solid-phase reaction theory is a prominent processing method for achieving ultra-precision damage-free surfaces. In order to develop the proposed method for polishing sapphire, the basic characteristics of the semi-fixed abrasive grains polishing tool for polishing sapphire were determined. Weight analysis was used to study the influence rules of parameters on surface roughness and material removal rates using an orthogonal experiment. Then, the optimized polishing tool was obtained through a mixture of abrasive particle sizes to reduce the difficulty in molding the polishing tool. Finally, polishing experiments using different polishing tools were carried out to investigate polishing performance by considering the surface roughness, material removal rate and the surface morphology during polishing. The results showed that (1) external load affects the surface roughness and material removal rate the most, followed by abrasive particle size, sand bond ratio, revolution speed of the workpiece and he polishing tool; (2) the difficulty in manufacturing the polishing tool could be reduced by mixing larger abrasive particles with small abrasive particles; (3) the polishing tool with 200 nm and 1 μm particle sizes performed best in the first 210 min polishing.
Chemical Mechanical Planarization
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Abrasion (mechanical)
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This study is paid attention to Electro-abrasive Polishing method which has both above electro polishing method and abrasive polishing method advantages to achieve high efficiency and high definition polishing processing, and conductive lapping tape was developed. Electro-abrasive Polishing for pure titanium materials by utilizing its tape was performed, and expectation and polishing characteristics experimentally were investigated. In this paper, abrasive materials which were applied to conductive lapping tape were changed and performed Electro-abrasive Polishing for pure titanium, effects of the abrasive materials on the polishing characteristics were cleared.
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Chemical Mechanical Planarization
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The necessity of fixed abrasive CMP in polishing semiconductor materials processing was analyzed. Compared the shortcomings of traditional free abrasive polishing with the advantages of fixed abrasive polishing, the applications of fixed abrasive polishing technology in semiconductor processing were described. A variety of fixed abrasive polishing pad production methods were introduced. The development trend of fixed abrasive polishing was prospected.
Chemical Mechanical Planarization
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This project conducts a study on wear performance and frictional behaviour of selected metals against stainless steel counterface under dry contact condition. The chosen materials for conducting this study are mild steel, copper and aluminium. The parameters used for inspection and analysis of this project are applied load (0-90N) and sliding distance (0-14 km). Block on ring machine was used to conduct the adhesive wear testings. The worn surfaces are examined and wear mechanisms are categorized using scanning electron microscopy. The results reveal that copper shows better wear properties and aluminium shows less friction. Mild steel exhibits a high rate of wear and material removal. All three materials revealed three different wear mechanisms; aluminium (abrasive and adhesive), mild steel (abrasive and ploughing), copper (adhesive).
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The electrical sliding wear of the Cu-0.8Cr-0.14Zr-0.06Mg alloy are studied by loading different lining speed and electric current in this article.The alloy sliding worn surfaces and wear mechanism are observed and analyzed by optical microscopy and SEM.The results show that the alloy solved at 920 ℃ for 30 min and aging at 450 ℃ for 180 min behaves a linear relationship between the wear volume and running speed,and the wear mechanism is adhesive wear and abrasive wear.The wear mechanism becomes adhesive wear,abrasive wear and arc induced wear after loading current.And as the current increases,the adhesive wear and arc induced wear is becoming increasingly serious.
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An investigation on the tribological properties of GCr15 sliding against NM600 was carried out using a high-temperature friction and wear tester. As the temperature rose from room temperature to 300 °C, the average friction coefficient of NM600 increased rapidly, then decreased rapidly, and then became stable. The wear volume and specific wear rate of NM600 increased rapidly, then decreased rapidly, and then increased slowly. The wear mechanism and matrix properties of the tested steel at different temperatures are the main reasons for the above results. At 20-50 °C, the main wear mechanism was adhesive wear, fatigue wear, and abrasive wear. At 100-150 ℃, the wear mechanism was mainly adhesive wear, fatigue wear, abrasive wear, and oxidation wear. At 200-300 °C, the wear mechanism was mainly oxidation wear and abrasive wear.
Adhesive wear
Lubricity
Wear coefficient
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