What are the welding difficulties of aluminum alloy

【Summary Description】 Welding difficulties What are the welding difficulties of aluminum alloy 1) Whether it is regular argon arc welding or brazing, if the forming method of aluminum alloy is casting, because it contains many impurities, it will add a lot of welding influence to the welding, so it is easy to produce pores when argon arc welding cast aluminum. At this time, it is necessary to use Welding materials such as low-temperature welding wire argon arc welding that can cover the pores. If it is brazing welding, the general Welding materials will lead to poor forming and welding failure, because the welding of castings is very poor, this time can be used 53 low temperature aluminum welding rod gas welding. 2) Aluminum alloy in special components such as aviation aluminum, with heat treatment state of 6 series aluminum alloy, they are prone to cracks in welding, welding requirements are very high, because the composition of these materials and heat treatment state makes the brazing performance becomes very poor. 3) In the process of welding, if this aluminum alloy is extruded or forged, it is better to weld, but aluminum is a relatively active metal, which is easy to oxidize at all times in the welding process, which is also an important reason for increasing the difficulty of aluminum welding. 4) Aluminum is a good thermal conductor and heat sink. Whether it is welding or brazing, the upper temperature of the temperature is much more troublesome than that of ferrous metals. There are several difficulties in aluminum alloy welding 1) Whether it is regular argon arc welding or brazing, if the forming method of aluminum alloy is casting, because it contains many impurities, it will add a lot of welding influence to the welding, so it is easy to produce pores when argon arc welding cast aluminum. At this time, it is necessary to use Welding materials such as low-temperature welding wire argon arc welding that can cover the pores. If it is brazing welding, the general Welding materials will lead to poor forming and welding failure, because the welding of castings is very poor, this time can be used 53 low temperature aluminum welding rod gas welding. 2) Aluminum alloy in special components such as aviation aluminum, with heat treatment state of 6 series aluminum alloy, they are prone to cracks in welding, welding requirements are very high, because the composition of these materials and heat treatment state makes the brazing performance becomes very poor. 3) In the process of welding, if this aluminum alloy is extruded or forged, it is better to weld, but aluminum is a relatively active metal, which is easy to oxidize at all times in the welding process, which is also an important reason for increasing the difficulty of aluminum welding. 4) Aluminum is a good thermal conductor and heat sink. Whether it is welding or brazing, the upper temperature of the temperature is much more troublesome than that of ferrous metals.

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