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选用典型的非均质脆性材料刚玉质超低水泥耐火材料为靶材,进行常温冲蚀磨损试验,借助有限元动力分析软件ANSYS/LS-DYNA建立单粒子冲蚀模型,参照试验条件模拟半径为0.39 mm的碳化硅球形粒子以3.97×10–6(kg.m)/s的动量对靶材的冲蚀过程,计算得到不同冲蚀角下靶材残余应力分布,对冲蚀后的靶材表面进行显微结构分析,研究了不同冲蚀角下靶材的冲蚀机制。结果表明:靶材冲蚀磨损率和最大残余应力均随冲蚀角的增加而增大,90°时达到最大值,分别为8.88 mm3/g和3.237 MPa;30°冲蚀角下冲蚀机制为磨料对靶材表面的微切削,90°冲蚀角下冲蚀机制主要包括基质微切削、粗骨料沿晶断裂和细骨料穿晶断裂。
Select the typical heterogeneous brittle material corundum ultra-low cement refractory as the target, at room temperature erosion wear test, with the help of finite element dynamic analysis software ANSYS / LS-DYNA single particle eclipse model, with reference to the experimental conditions of simulation radius 0.39 mm silicon carbide particles to 3.97 × 10-6 (kg.m) / s momentum on the target erosion process to calculate the different erosion angle target residual stress distribution of the target surface after erosion Microstructure analysis was carried out to study the erosion mechanism of target under different erosion angles. The results show that the erosion rate and the maximum residual stress increase with the increase of erosion angle and reach the maximum at 90 °, which are 8.88 mm3 / g and 3.237 MPa respectively. The erosion mechanism under 30 ° erosion angle For the micro-cutting of the surface of the target, the erosion mechanism mainly includes the micro-cutting of the substrate, the intergranular fracture of the coarse aggregate and the transgranular fracture of the fine aggregate.