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Research on the wear resistance of wear-resistant plates treated under different systems
Wear-resistant plates have been widely used in various fields of engineering machinery due to their high strength, low density, and good extrusion processing performance. However, ordinary wear-resistant plates have low hardness and poor wear resistance, and are easily corroded in harsh environments. Therefore, if wear-resistant plates are to be more widely used, corresponding surface treatment technology must be available to improve these shortcomings. Wear-resistant plate surface treatment technology can generate a layer of wear-resistant layer in situ on the surface of the wear-resistant plate with excellent properties such as high hardness, good wear resistance and corrosion resistance, and strong bonding force with the matrix. This technology can effectively solve the defects of low surface hardness, poor wear resistance, and easy corrosion of wear-resistant plates, thereby significantly extending the service life of wear-resistant plates. At present, scientific researchers have done a lot of research on wear-resistant plates, but they still encounter many problems in practical applications. This article selects the optimal samples under the three systems, and then conducts friction and wear comparison tests with the substrate.
The experimental material is a new high-strength wear-resistant plate developed by JFE Steel. First, a cast aluminum alloy sample of 30.5 mm × 10 mm × 8 mm was obtained by wire cutting, and then polished with sandpaper from coarse to fine, and finally degreased with acetone and cleaned with an ultrasonic cleaner. Self-made micro-arc oxidation equipment was used to conduct micro-arc oxidation experiments on the sample solution formulations in aluminate, phosphate, and silicate systems.
This experiment uses the MMS-2A screen display friction and wear testing machine to evaluate the wear resistance of the ceramic layer. The wear resistance and friction coefficient of the micro-arc oxidation sample and the substrate were measured under reciprocating motion. In this experiment, GDL steel was used as the counter-wear material, and the outer dimensions were the same as the aluminum alloy sample. The friction type is sliding friction, the lubricating oil is special hydraulic refrigeration oil, and the oil dripping speed is 40d/min. The load is 100N, the rotation speed is 200r/min, and the experimental time is 30min. After the test is completed, clean and dry the sample repeatedly and accurately weigh the mass of the sample after the test. Calculate wear mass loss.
The results found that the wear resistance of the wear-resistant plate sample treated by micro-arc oxidation was significantly improved compared with the matrix, and the wear resistance in the aluminate system, phosphate system, and silicate system was improved. The amplitude gradually weakens.
