What is the pure aluminum wire? How are they classified?
A: Industrial pure aluminum: aluminum content ≥ 99.00%.
International model: 1060, 1035, 1100, 1200, 1370, etc.
China welding wire number: HS301
2. What is called aluminum alloy wire? How are they classified?
A: The addition of magnesium, silicon, manganese, copper, zinc and other alloying elements to aluminum forms a different Organization and performance, forming a different series of aluminum alloy materials, such as:
<1> Aluminum-copper alloy (LY192014 22192024)
<2> Al-Mn alloy (LF21 3003 30053105)
China welding wire number: HS321
<3> Al-Si Alloy (LT14A11 40434047)
China welding wire number: HS311
<4> Aluminum Magnesium Alloy (LF2--LF16 5005 505251825356 )
China welding wire number: HS331
<5> Al-Mg-Si alloy ( LD2LD31 6061 60636070
<6> Aluminum Copper Magnesium-Zinc Alloy ( 7005 70507075 7475 )
<7>Al-Cu-Mg-Li alloy (8090)
3. Why it is difficult in Mig Aluminum welding wire ?
A: The technical difficulties of MIG welding aluminum are:
<1>The melting point of aluminum and aluminum alloys is low (purity of aluminum is 660°C), and high melting point oxygen is generated on the surface.
The film (AL2O3 2050°C) is liable to cause the welding not to fuse.
<2> Low-melting eutectic and welding stress are prone to weld hot cracks.
<3> The oxide film of the base metal and welding material absorbs moisture, and the weld seam easily generates pores.
<4>The thermal conductivity of aluminum is 3 times that of steel. The temperature field of the weld pool varies greatly. Control welding
4.Why usualy use Φ1.2/Φ1.6 size Aluminum welding wire in Mig welding?
A: When the MIG welding aluminum, due to the melting speed of the wire is very fast, the wire feeding speed is high; aluminum wire Small rigidity, relatively soft, when the push wire is fed, the fine wire is easy to build and bend, affecting the normal welding. So generally use Φ1.2/Φ1.6 aluminum wire