Hard-solder brazing filler metal suitable for TC4 titanium alloy thin-wall honeycomb structure and preparation method thereof and brazing method

• Main Authors: XIE XIUMIN, JIN SHUNYAO, GUO QINGMIAO, LIU XINQIN, LYU XINYU, LEI KUN, YIN ZHIXING, LI BO
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2020
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention discloses hard-solder brazing filler metal suitable for a TC4 titanium alloy thin-wall honeycomb structure and a preparation method thereof and a brazing method. The brazing filler metalis prepared from the following chemical components in percentage by weight: 12%-15% of Ni, 15%-18% of Cu, 9%-12% of Zr, less than or equal to 0.5% of Be, and the balance of Ti. The preparation methodof the brazing filler metal comprises the steps of material preparation; vacuum smelting; and pressure melt-spinning. The brazing method using the brazing filler metal comprises the steps of pre-brazing treatment of parts; and brazing, wherein the brazing temperature is 910 DEG C-930 DEG C, the heat insulation time is 0.5 h-1 h, and the parts are cooled after brazing. The brazing filler metal takes both melting point and diffusivity into account, the strength of a brazed joint is improved, especially the shear strength of the brazed joint interface, so that the reliable connection of the brazed interface is effectivel