江苏省冶金研究所研制的“二氧化碳气体保护焊专用铜管”,“铜铬锆合金板材”和“JD镀层铬铁头”等三项新产品于1991年7月份先后通过省级鉴定。一.二氧化碳气体保护焊专用铜管二氧化碳气体保护焊具有高效、节能、全位置的焊接等优点,在不少领城已取代了埋弧焊,而用其代替手工焊的场合更是屡见不鲜。在国外已普遍采用这种新工艺,在国内,国家科委则为重点推广项目。此法焊咀材料是关键,直接影响二氧化碳焊接法的效率和生产成本,是推广二氧化碳气体保护焊接法要解决的重要课题。本材料在铜锆铬合金中加入了微量元素,并 Jiangsu Province Metallurgical Institute developed “carbon dioxide gas welding for copper,” “copper chromium zirconium alloy plate” and “JD coated chrome iron head” and other three new products in July 1991 has passed the provincial appraisal. A carbon dioxide gas welding dedicated copper tube carbon dioxide gas shielded welding with high efficiency, energy saving, all-position welding and other advantages in many cities have replaced the submerged arc welding, welding instead of using it instead of the occasion is even more commonplace. In foreign countries have generally adopted this new technology, in China, the State Science and Technology Commission is focused on promoting the project. This method of welding Tsui material is the key, a direct impact on the efficiency of carbon dioxide welding and production costs, is to promote the carbon dioxide gas welding method to be solved an important issue. The material is added to the copper zirconium-chromium alloy trace elements, and