Production technology of metallopolymer rolling bearings

Li, R. I.; Kiba, M. R.

doi:10.1134/s1995421216020131

Cited by 13 publications

(3 citation statements)

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“…Rolling bearings are an important part of contemporary mechanical equipment [1][2][3], which are widely used in automobiles, home appliances, medical equipment and other fields [4,5]. As one of the important components of the bearing, the roundness error of the bearing ring is a significant quality index for evaluating the quality of the bearing ring [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of cold treatment process on roundness of bearing ring

Shao

Peng

Chen

2022

Mater. Res. Express

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In the heat treatment of the bearing ring, due to the different degree of thermal expansion of the outer surface and inner metal of the bearing ring, and the large thermal stress and tissue stress generated in the ring, resulting in serious deformation of the ring in the diameter direction and increased roundness error. For these problems, the heat treatment test of the bearing ring was carried out, with the cold treatment process added to the heat treatment. The effect of cold treatment on the residual stress, retained austenite and roundness of the bearing ring was analyzed. The research results show that: because the degree of deformation of the bearing ring is affected by the residual stress, the cold treatment process can significantly improve the residual stress on the bearing ring surface and reduce the deformation. The cold treatment process can accelerate the transformation from retained austenite to martensite in the bearing ring, reduce the content of retained austenite, refine the martensite structure and promote the precipitation of network carbide. The cold treatment after quenching also can improve the roundness accuracy of the bear outer ring and the bearing ring raceway, and ensure the processing quality and dimensional stability, which will be a significant benefit in industrial applications.

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Section: Introductionmentioning

confidence: 99%

Effect of cold treatment process on roundness of bearing ring

Shao

Peng

Chen

2022

Mater. Res. Express

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“…Thus, enhancing the antifouling performance of polyamide RO membrane is a necessary and signicant endeavour. [9][10][11] Membrane contamination is a process where dirt settles down or is adsorbed on the membrane surface, depending on multi-interactions between membrane surface and dirt. 12 Numerous studies show that membranes with low hydrophilicity and modication surface have good antifouling performance.…”

Section: Introductionmentioning

confidence: 99%

Tailor-made high-performance reverse osmosis membranes by surface fixation of hydrophilic macromolecules for wastewater treatment

Liu

Guo²,

Zhang

et al. 2019

RSC Adv.

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Polyamide aromatic (PA) reverse osmosis (RO) membranes are currently the most important materials in the seawater desalination and wastewater treatment industry. This study used hydrophilic macromolecular polyvinylpyrrolidone (PVP) in a PA selective layer to develop a new polyamide thin-film composite (TFC), namely PA-g-PVP RO, which will be used for water treatment. The TFC is prepared via an interfacial polymerisation process, and TFC-based PVP can be transplanted on a PA surface by radiation. PA-g-PVP RO was characterised by ATR-FTIR, SEM, XPS, AFM and contact angle test and then evaluated by determining its permeability, salt retention and antifouling performance, among other properties. Resultsshow that the chemical composition and surface morphology of the polyamide film significantly changed. A PVP brush grafted on an RO membrane surface significantly enhanced the hydrophilicity and antifouling performance of the membrane. When the PVP concentration was increased in an aqueous solution to 2%, the water contact angle of the sacrificial layer of the modified membrane decreased to 24.3 , the fouling recovery ratio to 93.4% and the salt retention increased to 99.5% at a small flux change. This combined technology can also be used for other macromolecules to modify the membrane and study the preparation and modification of ultra-filtration and nano-filtration membranes. Fig. 9 (a) Filtration performance (water fluxs and salt rejections) and (b) separation layer structure (surface roughness and thickness) of the composite membranes by varying the PVP concentration while keeping the irradiation dose (20 kGy) constant.This journal is

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“…Repair of worn-out base members decreases significantly the cost for car repair and reduces the environmental load owing to lower power consumption, metal consumption, and environmental pollution. There is a wide range of techniques for repairing base members of cars [1][2][3][4][5][6]. Among their diversity, repairing base members with polymer materials is advantageous because of its simplicity, low energy consumption, and reduced costs while it prolongs lifetime of base members and bearing units.…”

mentioning

confidence: 99%