我厂在生产某聚乙烯醇工程第五精馏塔的任务中曾进行了Gr18Nil2Mo2Ti不锈钢板的埋弧自动焊工艺试验。根据该设备的操作条件(设计压力0.4公斤/厘米~2,工作温度126℃,介质为醋酸、水,乙烯醛)作了接头的机械性能、金相及晶间腐蚀试验。在此基础上投产了三台设备,获得以下粗浅认识,现简述如下。 I plant in the production of a polyvinyl alcohol fifth rectification tower task Gr18Nil2Mo2Ti stainless steel plate has been carried out submerged arc welding technology test. According to the equipment operating conditions (design pressure 0.4 kg / cm ~ 2, working temperature 126 ℃, the medium is acetic acid, water, vinyl aldehyde) as a joint mechanical properties, metallographic and intergranular corrosion test. On this basis, put into operation three devices, access to the following superficial understanding, are summarized as follows.