Cold Pressure Needle Test Method And Results

female crimp contact The test used the same and dissimilar metal butt joints with four typical metal crystal structures as analysis samples and welded them on a self-made LQ-25 automatic cold pressure welding machine. Metal combination: ① Same metal. ② Face-centered cubic-face-centered cubic, limited mutual solubility, Al-Cu. ③ Face-centered cubic-close-packed hexagonal, immiscible at room temperature, Al-Cd. ④ Face-centered cubic-tetragonal, limited mutual solubility at high temperature, Al-Sn. ⑤ Incoherent face-centered cubic-face-centered cubic, immiscible in both liquid and solid phases, Al-Pb. The purity, hardness, welding combination and mismatch between the combined metals of the test materials are shown in Table 1. After tensile, bending and flattening tests, the welded joints did not break or crack, meeting the mechanical properties requirements of the joints.