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汽轮机隔板的焊接,我厂多年来,一直采用手工电弧焊。因其材质多是ZG15CrMo V,ZG20CrMO,及15CrMo A等耐热钢,焊前均需予热至250～300℃,所以焊工劳动强度很大,手工焊由于规范不易掌握,因此焊后产品的几何尺寸很难保证。焊后修磨浪费很多工间。手工电弧焊已远远满足不了汽轮机制造业的发展,为此我们决定用CO_2气体保护自动焊来焊接隔板。经过一年多的实验证明:这种焊接方法对于焊接工作温度在355℃～240℃的9～14级汽轮机隔板是完全可行的。这种方法不但能
Turbine separator welding, I plant over the years, has been using manual arc welding. Because of its material mostly ZG15CrMo V, ZG20CrMO, and 15CrMo A and other heat-resistant steel, before welding are required to be heated to 250 ~ 300 ℃, so a large labor intensity welder, hand welding due to the specification is not easy to grasp, so after welding product geometry Size is difficult to guarantee. After grinding grinding waste a lot of workroom. Manual arc welding has far failed to meet the steam turbine manufacturing industry, for which we have decided to use CO_2 gas welding to protect the automatic welding separator. After more than a year of experiments, it has been proved that this welding method is totally feasible for the 9-14-level turbine diaphragm with working temperature of 355-240 ℃. This method not only can