How to weld cast iron

【Summary Description】 Cast iron welding How to weld cast iron When it comes to cast iron welding rod, we must all know, because we often encounter the fracture of the machine base and cover in our life. At this time, we need to use cast iron welding rod to weld the broken part. Xiao Bian, now let's give you a specific introduction to the welding methods and precautions of cast iron welding rods. One. Thermal welding method of cast iron electrode The so-called thermal welding method is to heat the cast iron welding rod for welding. First of all, before welding, we will heat all the objects to degrees. During the welding process, the temperature of the whole welding part cannot be lower than degrees. But after welding, we can wait for it to cool down. The method of thermal welding is generally gas welding and electric welding, and the tools needed are hot furnaces and Welding tools. The process is generally as follows: the first is to preheat, clean the entire welded parts until the metal is exposed, and then put them into the furnace for heating. After that, welding is carried out. Generally, neutral flame welding is used. When the metal is melted through, the welding rod is put in. Then when white spots appear, the welding agent is put in. The welding agent must be put in an appropriate amount, and then welding is carried out. But in the process of welding should pay attention to the weld smooth. Finally, it is good to cool down. During the cooling process, pay attention to the cover plate to avoid cracks. II. Cold welding method of cast iron electrode The welding method of cold welding is generally electric welding. The first step of cold welding and hot welding is the same. First clean up until the metal is exposed, and then start welding. During the welding process, both the electrode and the current should be as small as possible to avoid wasting the electrode, and it is best to keep the current stable during the welding process, and do not affect the welding because of the temperature. When welding, it is best to follow the principle of first inside and then outside, spread the welding, and weld the second layer after welding the first layer. It is best to check whether there are any pores or cracks left during welding. It is good to weld carefully in this way. Besides. Three. Welding Precautions First of all, one of our more important points is that in the process of welding, we must first clean up the sundries on it. For the hot welding electrode, we must also remove the oxide on it. The second is to pay attention to, when welding cracks, pay attention to observe the shape of the cracks and so on, choose a good electrode, and one more thing is, if you choose cold welding, you should preheat it first, then choose the appropriate current, and keep the current stable. The welding method of cast iron welding rod is probably like this, but whether it is hot welding or cold welding is a very dangerous process, we should pay attention to safety in the process of welding, but also pay attention to the matters needing attention when welding. The above is a brief introduction to the welding method of cast iron welding rod, hoping to help everyone!

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