不锈钢自保护药芯焊丝脱渣性研究

为了定量分析药芯焊丝渣系组分对不锈钢自保护药芯焊丝脱渣性的影响,采用极端顶点混料回归设计方法,利用stat-ease公司出品的Design Expert 8.0软件进行试验设计与结果分析,试验中,将渣系中七种组分作为自变量,焊缝的脱渣率作为目标函数,建立了脱渣率与渣系组分的数学模型;并且根据二维等值图与三维响应曲面图直观的观察当固定4种组分的含量时,其它3种组分对因变量的影响情况;利用软件的优化求解功能,得出脱渣率最高的渣系组分理论配比,经实际验证,方程拟合良好,实际脱渣率与预测脱渣率相近,说明该方法对药芯焊丝渣系设计具有指导意义。

Slag detachability of stainless steel self shielded flux cored wire

In order to quantitatively analyze the effect of slag components of self-shielded flux-cored wire on the slag detachability, the method of extreme vertex mixing regression and the Design Expert 8.0 software of stat-ease company were used to make experiment design and result analysis. In the experiment, the mathematic model of slagging rate and slag composition was established by using the seven components in the slag as the independent variables and the deslagging rate of the weld as the objective function. when the content of the four components is kept to be unvaried, the effect of the other three components on the dependent variable can be intuitively observed by two-dimensional contour map and the three-dimensional response surface diagram. The optimal slag composition was obtained by the function of optimization solution of the software. The experimental results show that the method has a good reference to the slag design of flux cored wire. The fitted equation to predict slag removal rate was similar to the actual slag removal rate by actual validation, which indicates that the method has some guiding significance for design of slag components of flux-cored wire.