Cu-4Ag合金微细丝拉拔极限预测模型%Prediction model for drawing limit of Cu-4Ag alloy microwires
河南科技大学材料科学与工程学院 河南森格材料科技有限公司 河南省科学院
2024-04-02
Cu-4Ag合金微细丝 屈服强度 抗拉强度 拉拔极限预测模型 MATLAB
采用三室真空冷型竖引连铸设备制备了Cu-4Ag合金铸态杆坯,并利用连续冷拉拔变形得到了不同线径的Cu-4Ag合金微细丝,通过拉拔实验获取了不同线径下材料的屈服强度和抗拉强度;基于线径与强度的关系,构建了微细丝拉拔极限预测模型.结果表明,在拉拔过程中,Cu-4Ag合金微细丝的线径与抗拉强度密切相关,具有明显的尺寸效应;修正后的拉拔极限模型能够较为准确地预测不同线径的Cu-4Ag合金微细丝能够达到的拉拔极限.将拉拔极限模型产出的数据导入MATLAB中,构建了三维曲面模型,可以更为直观地分析材料的拉拔极限.%Cu-4Ag alloy cast rod billets were prepared by using the three-chamber vacuum cold vertical lead continuous casting equipment,and Cu-4Ag alloy microwires with different wire diameters were obtained by continuous cold drawing deformation.The yield strength and tensile strength of materials with different wire diameters were obtained by drawing tests.Based on the relationship between wire diameters and strength,the drawing limit prediction model for microwire was established.The results show that during the drawing process,the wire diameter of Cu-4Ag alloy microwire is closely related to the tensile strength,and there is significant size effect;the modified drawing limit model can accurately predict the drawing limit that Cu-4Ag alloy microwires with different wire diameters can reach.The data generated by the drawing limit model was imported into MATLAB to construct the three-dimensional curved surface model,and it can more intuitively analyze the drawing limit of materials.
