The reactor fuel assembly is a key component of the reactor core, whose main function is to protect the dye pellets from coolant erosion, release energy, and shield the leakage of strong radioactive substances. Therefore, the mechanical properties and corrosion resistance of the nuclear fuel assembly should have quite high performance requirements. Among them, zirconium niobium alloy is widely used in heavy water reactor, nuclear power plant and submarine reactor shell material, but the current zirconium niobium alloy product quality is not satisfactory, there are the following problems: 1. (2) corrosion resistance and mechanical properties have room for improvement.
The purpose of this technology is to provide a zirconium niobium lead alloy smelting system to overcome the shortcomings of the existing technology. To achieve the above purpose, this technology adopts the following technical scheme: a smelting system of zirconium niobium lead alloy, including successively connected processing device of zirconium niobium lead electrode block, vacuum argon filled welding box and vacuum consumable electric arc furnace. Preferably, the processing device of zirconium, niobium and lead electrode blocks is a pressing machine, which is connected with a mixing machine with a feeding port, which is connected with a niobium chip processing device, a sponge zirconium feeding pipe and a lead powder feeding pipe, respectively. The niobium chip processing device is further optimized as a crusher. Further preferably, the crusher is connected with an electron beam furnace. Further preferably, the sponge zirconium feeding pipe is connected with the sponge zirconium pretreatment device, which comprises a cleaning tank and a vacuum dryer, and a plurality of spray heads for deionized water are arranged above the cleaning tank. (1) the niobium strip is processed into niobium chip, which is mixed with sponge zirconium and lead powder and pressed into several electrode blocks of the same size. The electrode blocks are transferred to a vacuum argon filled welding box and welded into a consumable electrode by argon arc welding. (2) obtained by melting in a vacuum consumable arc furnace; Among them, the mass ratio of sponge zirconium, niobium bar and lead powder is 5 ~ 8:1:0.
