由湖南大学和茶陵电焊条厂共同研制的铸278电焊条不久前问世。铸278电焊条在铸件刚度不很大的情况下,焊缝不开裂,容易进行机加工。不少单位进行了对比试验,认为铸278电焊条焊缝抗裂性能和机械加工性能,以及焊条工艺性能等均超过目前我国其它种类的铸铁芯铸铁焊条(铸278电焊条也是一种铸铁芯类型的铸铁电焊条),能在焊前不预热、焊后不 Casting 278 welding electrodes jointly developed by Hunan University and Chaling Welding Rod Factory came out recently. Cast 278 welding electrode in the case of castings is not very large, the weld is not cracking, easy machining. Many units conducted a comparative test, that cast 278 welding seam weld cracking resistance and mechanical processing performance, and electrode technology performance are more than the current other types of cast iron cast iron electrode (cast 278 welding electrode is also a cast iron core type Cast iron welding rod), can not be preheated before welding, not after welding