基于多种方法分析钒与稀土对合金性能的影响

Effect of Vanadium and Rare Earth on the Properties of Alloys Based on a Variety of Methods

针对合金性能,基于最小二乘法原理,构造拟合函数,分析单独添加微量元素钒、稀土和混合添加分别对合金抗拉强度、延伸率和热裂倾向值三方面性能的影响.利用层次分析法确定权重,运用非线性规划构造目标函数,确定单独添加微量的钒、单独添加微量的稀土以及混合添加微量的钒和稀土三种方案中使合金整体性能达到最优的方案.

According to the properties of the alloy, and based on the least square method, and struc- ture function, this paper analyzes the single addition of trace element vanadium, rare earths as well as the mixture of the two on the performance the three aspects of tensile strength, elongation and hot cracking tendency. We use the AHP to determine the weight and construct the objective function by u- sing nonlinear programming. Finally we determine which three schemes （the single addition of trace ele- ment vanadium, rare earths and the mixture of the two） to achieve optimal overall performance of alloy.