相对冲磨角度对过流部件冲磨特性的影响

Influence of relative angle of grinding on the wear characteristics of overcurrent components

为研究相对冲磨角度对过流部件冲磨特性的影响,利用自主研制的固液两相流体的磨粒磨损实验设备,研究了相对冲磨角度对Q235、40Cr和ZL102三种金属过流件试样的影响规律.结果表明,随相对冲磨角度的增大,Q235、40Cr和ZL102三种材料的质量磨损强度和体积磨损强度增加到某一峰值后缓慢下降,其最大质量磨损强度和体积磨损强度分别出现在30°,45°和15°附近.在相对磨损角度0°～90°范围,出现最大磨损量对应的冲磨角度随材料硬度(脆性)增大而增大.用Q235材料制备的过流部件应避免出现20°～40°弯角,用40Cr材料制备的过流部件时需设计成低的冲磨角度,ZL102材料应避免小角度冲磨切削.

Water jet mill belongs to solid-liquid dual phase flow of abrasive wear.The occurrence of abrasive wear and abrasive particles and the characteristics of the equipment working conditions are closely correlated.Different working environment,the corresponding abrasive wear mechanism,wear characteristics will be different.In this paper,based on the transmission equipment of low-speed circulation,the abrasive wear experimental equipment of solid-liquid dual phase flow is designed.The influence law of relative grinding angle on the specimens of three typical metal flow parts is explored,and made the following conclusions.The characteristics of general metallic materials are between brittle materials and elastic materials,all of which are ductile materials.Therefore,the actual sample contains both cutting and deformation wear during the wear process.In the relative wear angle of0°~90°,the angle of wear corresponding to the maximum wear amount increases as the hardness(brittleness)of the material increases.Over-flow parts prepared with Q235material should avoid 20°~40°corners.When using over-flow parts made of 40Cr material,it should be designed to have a low angle of grinding.ZL102material should avoid small angle grinding.