Aluminium alloy solders commonsensible interlocution

Why does 1. make aluminium? How are they classified?
Answer: Industrial aluminium: ≥ of the quantity that contain aluminium 99.00% . Homebred brand: L1, L2, L3, L4, L5. World type: 1060, 1035, 1100, 1200, 1370 wait for brand of homebred welding wire: HS301
Why does 2. make aluminium alloy? How are they classified?
Answer: The alloying element such as magnesian, silicon, manganese, copper, zinc attends in aluminous material, form different organization and function, form different the aluminium alloy material of series, be like:
< 1 > aluminum-copper alloy (LY19201422192024)
< 2 > aluminous manganese alloy (LF21300330053105) brand of homebred welding wire: HS321
< 3 > aluminum-silicon alloy (LT14A1140434047) brand of homebred welding wire: HS311
< 4 > aluminum-magnesium alloy (LF2- - LF165005505251825356) brand of homebred welding wire: HS331
< 5 > alloy of aluminium magnesium silicon (LD2LD31606160636070)
< 6 > alloy of aluminous copper magnesian zinc (7005705070757475)
< 7 > alloy of aluminous copper magnesian lithium (8090) wait
3. why should be MIG solder aluminium used inferior does efflux transfer?
Answer: Inferior efflux transfers, debug in the electric arc composition that transfers in efflux piece 3, the short circuit of 5% transfers composition, ensure electric arc length is shorter, electric arc not drift, it is as good as cathode nebulization that gas is safeguarded, the inclination that produces air hole is little, quality of welding line connotation is high.
4. why is the technical difficult problem of MIG solder aluminium more?
Answer: The technical difficult problem of MIG solder aluminium basically has:
< 1 > the melting point of aluminium and aluminium alloy is low (aluminium 660 ℃ ) , appearance generates Gao Rong to order oxidation film (AL2O32050 ℃ ) , form simply solder not fusion.
< 2 > low melting point in all brilliant content and welding stress, happen simply solder hot crack.
< 3 > adsorbed water of film of oxidation of mother capable person, solder material is divided, welding line produces air hole simply.
< 4 > 3 times aluminous thermal conductivity is steel, the temperature field change of welding line bath is big, the difficulty that control welding line shapes is greater.
< 5 > solder be out of shape bigger.
5. why should MIG solder aluminium use Φ 1.2/ Φ 1.6 welding wire?
Answer: When MIG solder is aluminous, because the fused rate of welding wire is very rapid, rate sending silk is high; Tigidity of aluminous welding wire is small, contrast is soft, when pushing silk to send, fine welding wire piles silk simply to make a turn, the influence solders normally. Apply Φ 1.2/ Φ commonly so 1.6 aluminous welding wire.
What calls 6. clean width?
Answer: When TIG communication and MIG dc receive solder aluminium instead, negative electrode (mother capable person) the light fine zonule that the electron launchs centrally on appearance, " cathode pulverization area " , this area is clean width, arrange film of aluminous outside oxidation.

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