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采用两种合金钢进行模拟磨料磨损犁削模型的单颗粒犁削试验。同时,在ML-10销盘式磨损试验机上进行两体磨料磨损试验。由犁削试验获得广义载荷-位移曲线,从中求出在三维不等压缩应力状态下材料的屈服应力(σ-3s)和极限应力(σ-3b)以及在犁削过程中,初压区的能车消耗(E_1)、犁削区的能E量消耗(E_2)和总量消耗(E_t)。利用力学参数群[σ-3s、σ-3b、E_1、E_2、E_t]来描述犁削过程中材料的变形、断裂等力学行为。结果表明,材料在三维不等应力状态下的加工硬化能力明显高于简单拉伸应力状态下的加工硬化能力。根据磨损过程中能量消耗的动态变化可以直接判别材料的耐磨性。
Two kinds of alloy steel were used to simulate single-particle plow cutting of abrasive wear plow model. At the same time, two-body abrasive wear test was conducted on the ML-10 pin-on-disc wear tester. The generalized load-displacement curve is obtained from the plow test. The yield stress (σ-3s) and the ultimate stress (σ-3b) of the material under three-dimensional unequal compressive stress are obtained. Energy consumption (E_1), energy E consumption (E_2) and total energy consumption (E_t) in the plow area. The mechanics parameter group [σ-3s, σ-3b, E_1, E_2, E_t] is used to describe the mechanical behaviors such as deformation and fracture of the material in the process of plowing. The results show that the work hardening ability of the material in three-dimensional unequal stress state is obviously higher than that of the simple tensile stress state. According to the dynamic changes of energy consumption in the wear process can directly determine the wear resistance of the material.