Aluminium 5052 h32 sheet
Aluminium 5052 h32 has many advantages. With the development of related industries such as machinery and automobiles, the demand for 5052 aluminum sheet is increasing, and its research is mainly focused on alloy welding process. Now let’s take a look at the aluminum-magnesium alloy welding characteristics of 5052 h32 aluminum sheet plate:
Aluminium 5052 h32 has a strong reduction capacity
The affinity of aluminum and oxygen is very strong. Aluminum is easily combined with oxidation in the air to form a dense and strong aluminum oxide film with a thickness of about 0.1 μm; the melting point of aluminum oxide is as high as 2050°C, which is much higher than that of aluminum and aluminum alloys (500-600 ℃). In the welding process, the oxide film will hinder the good bonding between the metals, and it is easy to cause slag inclusions. The aluminum oxide film will also absorb moisture, which will cause the weld to generate pores during welding.
Higher thermal conductivity and specific heat capacity
The thermal conductivity and specific heat capacity of aluminium 5052 h32 are more than twice that of carbon steel and low alloy steel. During the welding process, a large amount of heat is quickly transferred into the base metal. Therefore, when welding aluminum and aluminum alloys, the heat is consumed In addition to melting the metal, more unnecessary consumption of other parts of the metal.
aluminium 5052 h32 hot cracking tendency
The coefficient of linear expansion of aluminum is about 22.9 x 10-6/ ℃, iron is 11.7 x10-6/ ℃, the coefficient of linear expansion of aluminum and aluminum alloy is about twice that of carbon steel and low alloy steel. The volume shrinkage of aluminum during solidification is relatively large, up to 6.5%, and iron is 3.5%. Therefore, aluminum and aluminum alloys are prone to shrinkage, shrinkage, thermal cracking and high internal stress when welding. This requires more attention.
High stomata sensitivity
Aluminum and aluminum alloy liquid molten pools easily absorb gases such as hydrogen. A large amount of dissolved gas at high temperature is too late to precipitate during the cooling and solidification process after welding, and it will form pores in the weld. The moisture in the arc column atmosphere, the moisture absorbed by the welding material and the oxide film on the surface of the base material are all important sources of hydrogen in the weld.
The above is about some characteristics of aluminum 5052 h32 and aluminum alloy, I hope this is useful. If there is anything you need to add, or are interested in aluminum 5052, welcome to communicate in time.