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Welding difficulties of aluminium alloy plate

  • Author:Dong Xing
  • Release on:2017-10-12
Aluminum alloy with high strength, high thermal conductivity, corrosion resistance, good physical and mechanical properties, so it is widely used in various industries. When in use, the welding is commonly used in machining operation, but there are some difficulties in this process. The aluminium alloy manufacturers to introduce you to the welding difficulty:

1. It is easy to oxidize. The surface of aluminum alloy plate is easy to form alumina film. It is easy to absorb moisture. When welding, it hinders the fusion, and it is easy to form defects such as blowhole, slag inclusion, incomplete fusion and so on, which results in the decrease of weld performance. Harbin Dong Xing Aluminum Co., Ltd is a competent and reliable Aluminum sheet manufacturer china.

2, easy to produce porosity. Aluminium alloy welding is generated when the porosity is the main reason of hydrogen, because a lot of liquidaluminum can be dissolved hydrogen, and solid aluminum hardly dissolved hydrogen, so when the rapid cooling and solidification of molten pool temperature, hydrogen can escape easily in the weld together to form pores.
3, the weld deformation and crack formation tendency. The shrinkage coefficient and crystallization is two times bigger than steel aluminum expansion line, easy to produce welding deformation of large internal stress, the structure rigidity will lead to hot cracks.

4, the heat conductivity of aluminum is large, welding alloy aluminum plate, it will consume more heat. Harbin Dong Xing Aluminum Co., Ltd could provide you with 7075 aluminum plate  on sale.

5, the evaporation loss of alloy elements. Aluminium alloy containing low boiling point elements (such as magnesium, zinc, manganese, etc.) in high temperature arc action, extremelyeasy evaporation loss, thereby changing the chemical composition of weld metal, the weld performancedegradation.

6, high temperature strength and low plasticity. High temperature aluminum alloy strength and plasticity is very low, destruction of the forming of weld metal, sometimes easy to cause the weld metal Caveand welding wear phenomenon.

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