Hardness, abrasive wear of the

Abrasive wear is due to a friction surface of the convex part and the other hard- surface contact between the friction surface or both the hard particles exist in the event of relative movement of the two surfaces of the one surface or both surfaces of the material is  transferred  Mounted flap wheel signs of wear . (B ) abrasive and abrasive wear mechanism for the relative movement of the part surface , the abrasive force on the perpendicular to the surface of the decomposed component of the force parallel to the surface . 1 perpendicular to the surface embedded in the surface of the abrasive component , good material for the plastic surface indentation large dense , repeated action , resulting in fatigue and damage , the brittle  flap wheel materials do not produce distortion on the surface of brittle fracture . (2) parallel to the surface of the abrasive component tangential movement generated , resulting surface is scored , and the cutting groove is left , the plastic material , the abrasive cutting surface of the friction will cut a chip of brittle materials , abrasive cutting time cut from the surface a lot of debris.
Abrasive wear rate is very large, many major damage in the form of machinery and equipment . (C ) the main factors affecting abrasion 1 Abrasive wear particle size on the amount of wear of the metal with the increase of the size of the abrasive increases when the abrasive size increases after a certain size , the wear rate is constant 2 Abrasive the cutting and grinding disc  geometry of the impact on the wear of the sharp edges of abrasive abrasive wear than the sleek , high-speed , abrasive being blunt , the wear rate of decline , if the abrasive is ground , the grinding speed will increase by 3 . abrasive hardness on the amount of wear impact Thus, the enhanced surface hardness of the part approaches or exceeds the hardness of the abrasive , to improve the wear resistance of parts , but the high hardness of the material , will cause decrease in toughness , increased brittleness and other consequences. ( 1 ) Abrasive hardness is lower than the hardness components , the wear amount of the difference in hardness between the two , the difference increases, the wear rate decrease ( 2 ) parts abrasive hardness higher than the hardness , the wear serious , the difference in hardness between the less small , wear reduction .