Abstract: Deburring cutter,which is a special purpose cemented carbide tool for cutting off.burr mom welded seam on inner and outer surface of welded tube,has been strictly required for its geometric accuracy, inherent quality of alloy and property targets. The present paper has outlined the cemented carbide deburring cutter developed for completing the whole set of tube welding production line imported by our country. By strengthening ball grinding,adding elements etc. the alloy developed has fine grain structure and superior high temperature Performance,thus and so has been used for replacing imported products and exhibited obvious economic and socisl efficiency.