Research on contact fatigue resistance of Ni/P diamond composite coatings
Under high load and high frequency contact fatigue,the wear resistance,fatigue resistance and hardness of the material surface are very important to improve the life and reliability of mechanical parts.In order to provide excellent coating materials for many fields,the contact fatigue resistance of Ni/P diamond composite coating was studied by using the hardness and wear resistance of diamond.Ni/P diamond composite solution was prepared with 2µm,4µm,8µm diamond and Ni/P base plating solution,which was sprayed on 20 steel test blocks to make three kinds of coating samples.The properties of different samples were tested by contact fatigue tester and friction and wear tester.The results show that the samples with diamond particle size of 8µm have better anti-contact fatigue effect,longer characteristic life in contact fatigue test,smaller friction coefficient,stronger friction resistance,and higher hardness and corrosion resistance.When the temperature is 800℃,the hardness is still greater than 97 GPa.Therefore,it is concluded that the Ni/P diamond composite coating with a diamond particle size of 8µm has good contact fatigue resistance.
万方数据
维普
