基于交互正交试验的304不锈钢冲蚀磨损性能的影响因素研究

Research on Factors Affecting Erosion Wear Performance of 304 Stainless Steel Based on Interactive Orthogonal Experiment

设计了带交互作用的L 8(27)多因素/因子正交试验方案,利用自制旋转式冲蚀磨损试验机系统研究了冲击速度(V)、料浆温度(T)和硫酸浓度(C)三个因素及其交互作用因子(V×T,V×C,T×C,V×T×C)对304不锈钢冲蚀磨损性能的影响,采用极差和方差分析考察了各因素/因子对冲蚀磨损性能的影响程度,并利用SEM观察了冲蚀磨损后试样的表面形貌,分析了冲蚀磨损机理。结果表明:对304不锈钢冲蚀磨损性能的影响程度依次为T>C>T×C>V>V×T×C>V×T>V×C,其中T、C、交互作用T×C、V四项的影响高度显著,三因素之间的交互作用V×T×C也表现出一般显著,其余因素/因子不显著。在多因素影响的正交试验研究时,不应忽略因素间的交互作用。

Amulti-factors L8(27)orthogonal test scheme with interaction was designed to study the effect of three factors i.e.impact velocity,slurry temperature and sulfuric acid concentration as well as their interaction on erosion wear performance of 304 stainless steel by using a homemade rotary erosion wear tester.Range analysis and variance analysis of orthogonal experimental results were performed to investigate influence of each factor on erosion wear property.Surface morphologies of the samples after erosion wear tests were observed by SEM to analyze erosion wear mechanism.The results show that the order of influence of the parameters on erosive wear properties of 304 stainless steel is ranked as T>C>T×C>V>V×T×C>V×T>V×C.Among these factors,the four namely T,C,T×C as well as V are highly significant factors.The interaction of the three factors(V×T×C)has generally significant effect,other factors are not significant.When multi-factor orthogonal experiment is carried out,the interactions among factors should not be ignored.