cast iron nails

The reason why there are black spots in wire mesh welding is that the action of wire feeding should be timely filled in the melting time, and the development should be appropriate. There is no argon gas, long burning, large current, long distance, blunt tungsten needle and high molten pool temperature are the fundamental reasons for blackening. Continuous burning, is about active welding machine energy selection, machine welding will appear black spots.

Life said “wire”, in fact, is “low carbon steel wire”, carbon content in 0.2% below. The surface is usually coated with zinc coating because it is easy to rust. Under atmospheric conditions, the galvanized layer will not rust before most of the fall off, relatively soft. Life said “steel wire”, is the carbon content of about 0.6% of the “carbon steel wire”, or carbon content of about 0.8% of the “high carbon steel wire”, they have enough hardness and elasticity after appropriate heat treatment, high strength. The use of words such as winding ordinary spring and so on.