Multiple Composite Rare Earth Tungsten Electrode Welding And Cutting Green

China's " multiple composite rare earth tungsten electrodes and preparation technology " results recently passed expert appraisal. The study by Beijing University and Beijing General Research Institute of Mining and Metallurgy Beijing Tungsten & Molybdenum Material Factory co-developed multi-composite rare earth tungsten electrodes series of new products , manufacturing process and equipment, and testing equipment , such as full industrial technology , products, overall performance is better than radioactive thorium tungsten electrode to solve China's relevant materials industry is a major technical problems.

Tungsten is a kind of widely used welding, plasma welding, spraying, cutting technology and metallurgical industry in the critical heat source material , tungsten electrodes used worldwide each year the total consumption over 1600 tons . But currently using tungsten electrodes that there is still more than 70% of radioactive contamination thoriated tungsten electrodes , seriously polluting the environment and endanger human health. "multiple composite rare earth tungsten electrodes and preparation technology" project independently developed a diverse composite rare earth tungsten electrode material , not only integrated performance , but because they do not use radioactive elements thorium , to achieve a non-radioactive contamination in the field of green production and be used.

Chen Yunbo other three by the Academy of Sciences, 863 new materials technology special functional materials such as technical subject matter expert Chow head 13 experts appraisal committee believes that the project overall technology has reached the international advanced level. Project main features and innovations embodied in the establishment of a composite rare earth tungsten electrode burning model , explaining the electrodes wear mechanism reveals multiple composite rare synergy mechanism , proposed the use of rare earth complex synergistic composition design principles , invented the integrated welding performance is better than the existing multi- thoriated tungsten electrode composite rare earth tungsten electrodes ; proven rare earth tungsten electrodes multivariate powder metallurgy and plastic processing and other preparation processes were investigated to develop a diversified preparation of rare earth doped tungsten electrodes directly APT complex, large temperature gradient reduction , low current vertical melt sintering technology , the formation of rare earth tungsten electrodes for industrial production processes ; integrated innovation developed production line key equipment , to achieve efficient production and process quality control, industrial production yield than the current thorium tungsten 5% higher than the class -leading levels of materials processing , and the establishment of domestic rare earth 's first multi-composite tungsten electrode production lines with annual production capacity of 120 tons .


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