H13钢在铝液中的熔蚀-磨损行为与交互作用机理

摘要

通过对比分析H13钢在高温干摩擦磨损及熔蚀-磨损两种条件下的磨痕形貌、磨损产物及材料流失特征,研究H13钢在铝液中的熔蚀-磨损行为以及腐蚀与磨损的交互作用机理.结果表明:H13钢在铝液中熔蚀-磨损的材料流失量远高于其单纯腐蚀及单纯磨损条件下材料流失量之和.在本实验条件下,熔蚀与磨损的交互作用率均不小于93.9％.对已生成界面金属间化合物为典型腐蚀特征的这一类材料而言,其在铝液中的熔蚀-磨损性能主要由界面金属间化合物的性质、生成速度及其与基体的界面结合情况所决定.%Through analyzing and comparing the surface morphologies,wear debris and material loss of H13 tool steel both under high temperature dry sliding wear and corrosion-wear in molten aluminum conditions,the corrosion-wear behavior and synergy mechanism between corrosion and wear of H 13 tool steel in molten aluminum were investigated.The results show that the material loss of corrosion-wear is much higher than the total material loss of purely corrosion and purely wear.The synergy rate of corrosion-wear is not less than 93.9％ in our experiments.For those materials,the typical corroded feature is to generate intermetallic compound layer between the substrate and molten aluminum,the corrosion-wear resistance of material is depended on the formation rate and characterization of interrnetallic compound layer,as well as the combination between the substrate and the intermetallic zone.