Method for welding platinum/niobium composite plate and niobium screw

The invention discloses a method for welding a platinum/niobium composite plate and a niobium screw, which adopts a water-cooling copper tool with a pressing device to reduce the thermal deformation of the composite plate. Low-melting-point titanium alloy wires capable of being mutually melted with metal niobium are selected as filler welding wires, and the temperature of a welding pool is reduced; and intermittent welding is adopted, and welding is conducted repeatedly till a circle is welded. According to the welding method for the platinum/niobium composite anode plate and the niobium screw, the technical problems that when an existing platinum/niobium composite anode plate and the niobium screw are welded, the temperature is too high, so that a composite plate deforms, and a platinum coating is peeled off or fails to melt are solved. 本发明公开了一种铂/铌复合板与铌螺杆的焊接方法，该方法采用带压紧装置的水冷铜工装，减小复合板热变形；选用能与金属铌互熔的低熔点钛合金丝作为填充焊丝，降低焊接熔池温度；采用间歇焊接，反复多次施焊，直至焊满一周。本发明的铂/铌复合阳极板与铌螺杆的焊接方法，解决了现有的铂/铌复合阳极板与铌螺杆焊接时温度过高导致复合板变形、铂覆层剥落或熔化失效的技术难题