Design and application of friction pair surface modification coating for remanufacturing

Abstract

Friction, wear, and contact fatigue are the main causes of energy loss, material waste, and equipment failure. The aim of remanufacturing is to repair and modify the damaged equipment surface, and the surface coating is the major material that allows the remanufactured parts to be used in a new round of operation. Thus, the design and preparation of surface coatings are very important to repair, strengthen, or modify the friction pairs, in order to ensure long-term operation of the remanufactured parts. Recently, a lot of research on designing and preparing friction pair surface modification coatings has been conducted by the National Key Laboratory for Remanufacturing (NKLR). The research conducted achieved the following goals: the mechanism of micro/nano multilayer surface modification coatings with long-term efficacy life was revealed, and the corresponding design considerations and preparation methods of nanocrystalline micro tribological coatings were innovatively developed. A series of new "two-step" processes to prepare sulfide solid lubricating coatings were developed. The competitive failure mechanism of the surface coating in simultaneous wear and fatigue conditions was revealed, and some composite coatings with dual properties of wear resistance and fatigue resistance were prepared. Based on the stress distribution of friction surface contact areas and the piezoelectric effect, a failure warning intelligent coating is designed and developed. These coatings have been successfully applied to critical friction components, such as the spindle of large centrifugal compressors, engine cylinder piston components, and driver gear pairs.

A review of recent advances in tribology

“…Some of the coatings associated with superlubricity have been introduced in the superlubricity section and are not covered in detail again. Here, several new advances in tribological-related coating technology are briefly introduced, such as oxide coating [183][184][185][186], metal coating [187,188], composite coating [183,185,189,190], ceramic coating [191,192], and so on.…”

“…Wang et al [183,189] designed and prepared carbon nanotubes reinforced TiO 2 coatings, and found that a small content of CNTs could enhance the tribological properties of plasma sprayed ceramic coating remarkably, indirectly by influencing microstructure of coating and directly by tribo-effects of CNTs during tribotest, including structure strengthening, triboreorientation, tribo-protruding, tribo-film, and tribodefection as shown in Fig. 17.…”

Overview of Materials Used for the Basic Elements of Hydraulic Actuators and Sealing Systems and Their Surfaces Modification Methods

“…The most common causes of damage and failure of hydraulic actuators are three factors: abrasive wear, material fatigue, and friction [ 24 ].…”

Advances in the application of biomimetic surface engineering in the oil and gas industry

“…However, differing from oil/gas storage and transportation, the application of a biomimetic marine surface needs to focus on the marine environment and biological resource protection. Therefore, a new environmentally material or coating [121] will be the focus of research in the near future.…”