Study On The Low Temperature Nitriding And Character Of Frictional Wear Of Hydropost

The hydraulic prop is prone to be eroded very severely with obvious character of galvano-chemistry, because of being on the moist and eroded circumstance. Nitriding, ripeness of manufacturing technique and lower cost, may improve surface hardness, abradability and erosion resistance of the hydraulic prop. With the antiseptic treatment, the nitriding hydraulic prop may gain operating requirements. Nano technology affords advantageous auspice for resolving high tempering brittleness. The hydraulic prop achieves low temperature gas nitriding by surface nanocrystalline treatment which optimizes the texture and performance of materials surface, and resolving the high tempering brittleness of nitriding hydraulic prop.In this paper, we mostly study the low temperature nitriding process of 27SiMn by surface nanocrystalline pretreatment and the frictional wear character after nitriding. The task mainly includes three parts:First, we utilize alternating current to treat 27SiMn in electrolyte at different parameter for forming nanostructure on the sample surface, and characterize the sample by multiplicate test methods. Secondly, the samples are nitridinged respectively at 300℃, 400℃ ,460℃ and characterized by multiplicate test methods. Lastly, we study the frictional wear character of nitriding samples at different wear conditions, and probe into the mechanics of forming nanostructures and low temperature nitriding.We carry out an experiment on nitriding samples using friction wear testing machine WWM-1. On the condition of oil lubrication and flooding system lubrication, the friction factor of the samples after nitriding fall down and the wear extent decrease comparing with that of original samples. It is obvious that the low temperature nitriding process improve the abrasion-resistance of hydraulic prop.