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金属材料FV520B冲蚀模型的建立与验证

DOI: 10.3969/j.issn.1006-7043.201401023

Keywords: 冲蚀模型, 微切削, 变形磨损, 正交试验, 回归拟合, FV520B

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Abstract:

为了用数学的方式描述金属材料的冲蚀率随靶材属性、颗粒属性、环境因素的变化规律, 从颗粒冲击靶材的碰撞过程入手, 通过求解颗粒运动方程和碰撞的能量方程, 建立了基于微切削和变形磨损的塑性材料冲蚀模型。借助金属材料FV520B的正交冲蚀试验结果, 利用回归分析法获得FV520B冲蚀率计算模型, 并通过方差分析和单因素冲蚀试验对计算模型进行了验证。方差分析结果表明, 该冲蚀率计算模型非常显著, 由模型获得的冲蚀率计算值与单因素试验结果吻合程度较高, 说明该模型在预测金属材料FV520B不同环境下的冲蚀磨损时具有较好的适应性和可靠性, 研究结果对叶轮材料FV520B冲蚀磨损寿命的评估具有指导意义。

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