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在奥氏体不锈钢与铜合金异种材料摩擦焊接过程中,采用响应面方法优化摩擦焊接工艺参数,以获得抗拉强度最大和界面硬度最小的焊接接头。采用三因素、五水平中心复合正交矩阵来确定实验条件。得到20个焊接接头,测定了焊接接头的抗拉强度和界面硬度。采用方差分析(ANOVA)方法来确定起显著作用的、主要的及相互作用的参数,使用回归分析得到经验关系模型。用设计专家软件构造响应图和等高线图来优化摩擦焊接工艺参数。用得到的经验关系模型可以有效地预测焊接接头的抗拉强度和界面硬度,其置信水平达95%。从形成的等高线图可以得到所需的摩擦焊接的最佳条件。
In the process of friction welding austenitic stainless steel and copper alloy dissimilar materials, the response surface method is used to optimize the friction welding process parameters to obtain the welded joint with the largest tensile strength and the smallest interface hardness. A three-factor and five-level center composite orthogonal matrix was used to determine the experimental conditions. Twenty welded joints were obtained and the tensile strength and interface hardness of the welded joints were measured. An analysis of variance (ANOVA) method was used to identify significant, major, and interacting parameters, and a regression model was derived using empirical analysis. Use design expert software to construct response maps and contour plots to optimize friction welding process parameters. The obtained empirical relationship model can effectively predict the tensile strength and the interface hardness of the welded joints, with a confidence level of 95%. From the resulting contour map can get the best friction welding conditions.