铸铁件常在加工后发现有气孔、砂眼等缺陷,这时用热焊修补将造成铸件不能允许的变形,而采用冷焊又必须采用昂贵的高镍焊条。环氧塑料很适宜修补加工后发现缺陷的铸铁件。一、修补前的准备铸件修补前应将待修补的缺陷部位用錾子或钻头扩伤,使之露出金属光泽,然后用丙酮或四氧化碳清洗除油及灰尘,以免影响塑料与铸件本体的粘接。为了让塑料能更好地浸润铸件缺陷表面, Cast iron parts often found after processing holes, trachoma and other defects, then repaired with hot welding will cause deformation of castings can not be allowed, and the use of cold welding and expensive nickel electrodes must be used. Epoxy plastic is very suitable for repairing defects found in cast iron pieces. First, the preparation before repair Casting defects should be repaired before the site of repair with prickly heat or drill bit, so that the metal luster, and then use acetone or carbon tetrachloride to remove oil and dust, so as not to affect the plastic and cast body Bonding. In order for the plastic to better infiltrate the surface of the casting defect,