球墨铸铁端盖铸件焊补工艺控制流程概述  

Overview on Welding Repair Process Control Flow of Nodular Iron End Cap Castings

作　　者：田学森 TIAN Xue-sen(Kocel Machinery Co.,Ltd.,Yinchuan 750021,China)

机构地区：[1]共享装备股份有限公司,宁夏银川750021

出　　处：《现代铸铁》2021年第4期7-10,38,共5页Modern Cast Iron

摘　　要：针对球墨铸铁端盖铸件易出现的缺陷外露问题,在特定条件允许的情况下,对缺陷部位采用手工电弧冷焊方式进行焊补。通过对焊补工艺WPS确定、WPQR焊接工艺认定和焊接过程相关参数选择进行确定,规范了焊接过程控制流程和要求,明确了焊接过程的控制要点和注意事项,提高了球墨铸铁件一次焊补合格率,降低了焊接过程的风险,提高了焊补可靠性,使得焊补后的端盖铸件能够达到最终装配和使用要求。通过试验得出结论:采用镍铁合金焊条进行球墨铸铁焊补时,在焊接后采用磁粉探伤方法将会导致错判,焊补完成后采用渗透探伤可以避免类似问题。In view of the defect exposure problem of nodular iron end cover castings,manual electric arc cold welding was used to repair the defective parts under certain conditions.By determining the welding repair process WPS,WPQR welding process identification and welding process related parameter selection,the welding process control process and requirements were standardized,the control points and precautions of the welding process were clarified,and the one-time welding repair rate of nodular iron castings was improved.The risk of the welding process was reduced,and the reliability of welding repair was improved,so that the end cover casting after welding repair could meet the requirements of final assembly and usage.It was concluded through the experiment that when using nickel-iron alloy welding rod for nodular iron welding,the use of magnetic particle inspection method after welding would cause misjudgment.After welding repair was completed,penetrant testing could avoid similar problems.

关 键 词：球墨铸铁 端盖铸件 焊补工艺 

分 类 号：TG255[金属学及工艺—铸造]