EXPLANATION OF THE RELATION BETWEEN PHYSICAL PROPERTIES OF MATERIAL AND EROSION

为了研究由韧性金属材料的硬度(力学性能)或熔点(物理性能)等常用材料特性来预测材料冲蚀速率的可能性，在气流存在的情况下，在相对较低的冲击速度(40m/S以下)和30°~90°的冲击角度下进行了角状颗粒和球形颗粒的冲蚀试验。主要研究结果如下：(1)冲蚀速率W与材料特性C的某一指数n成正比(方程为W~C^n)，颗粒形状对冲蚀速率的影响大于撞击角度或速度等撞击条件。(2)研究发现，当试件受到角状颗粒的冲刷时，这种相互关系比受球形颗粒冲刷时更为明显。因此，根据常用的材料特性来预测延性材料的冲蚀速率是可能的。

To study if it is possible to predict erosion rate of material from popular material characteristics such as hardness (mechanical properties) or melting point (physical properties) on erosion in ductile metals, the experiment was conducted at relative low impingement velocities of under 40m/s and at impingement angles of 30°to 90°by angular particles and spherical particles under the existence of air stream. The main results are as follows.(1) It is confirmed that erosion rate W is proportional to a certain exponent n of material characteristics C (the equation is W〜C^n) and that shape of particle has more effects on the relation than impingement condition such as impingement angles or velocities.(2) It found that the mutual relation is more evident when specimen is eroded by angular particles than by spherical particles.As a conclusion, to predict erosion rate of ductile material from popular material characteristics seems to be possible.