Laser welding of light and heat energy is highly concentrated in very small (0.2mm ~ 2.0mm) spot in the moment (0.5ms ~ 20ms) wire and die base metal to melt. Melt cooling the welded part of the microstructure with the mold base metal, you can ensure welding quality; and if not, may occur trachoma, cracks, or adhesive is not strong and fall off. Choice affects welding quality welding consumables: If you choose to strips of metal with the mold base metal laser welding, the microstructure of the molten metal will be inconsistent with the mold base metal, weld quality from the impact.If you choose to stainless steel wire, or close to the stainless steel material when the laserWelding Electrode with the same above problem, and can not guarantee that the hardness after welding. Less because the carbon content of stainless steel, low hardness after welding, the welding of easy to wear.German imports of wire, there are different models for different mold materials. However, laser welding is different from arc welding, laser welding is a highly concentrated light and heat welding wire model choice is not very strict, as long as welding followed by the base metal fusion splicing and consistent hardness can be to achieve good weld quality. Wire to save: Laser welding alloy material, stainless steel wire, save the poor will be likely to rust. Some laser welding a thin layer of rust-proof material on the surface plating, but the anti-rust plated layer is too thick, otherwise it will affect theWelding Wire quality, because this anti-rust layer is equivalent to impurities in the welding process. The welding wire of the mirror mold, but not suitable for anti-rust layer plating. Wire to use to seal the bag, put the moisture beads, stored in a dry environment. On the long-term air-conditioned environment, can be stored for six months to a year will not rust. If the wire rust, surface rust with sandpaper layer hit bright, you can use without affecting the welding quality. The more common German wire model is MOLD10, MOLD50, MOLD55, and MOLD90. Where a diameter of 0.3mm, 0.4mm and 0.5mm common wire stock in the domestic stock. If you want to order a special wire is from the German order, depending on order quantity and delivery in a week to three weeks. Wire model of choice, mainly based on the use and hardness of the mold. However, each use of laser welding parameters to the wire when choosing a wire model, instructions for use as a reference, based on the laser welding parameters and operating habits.
1 level characteristics of welding power source, DC reverse polarity (Welding Wire connected the cathode)(2) generally use pure argon (purity 99.99%) or Ar +2% of O2, the flow 20 ~ 25L/min appropriate.3 arc length, stainless steel MIG welding, generally down in the conditions of the spray transfer welding voltage to be adjusted to the extent of the arc length in the 4 ~ 6mm.(4) wind. MIG welding is susceptible to the influence of wind, sometimes breeze air hole, and wind speed in 0.5m/sec above the place, should take precautions.The stainless steel flux cored wire welding points for attention:1 level characteristics of welding power source, DC welding with reverse polarity. General CO2 welder welding wire feed wheel pressure slightly loosen.2 shielding gas is usually carbon dioxide gas, the gas flow 20 ~ 25L/min more appropriate.(3) Welding Electrode the distance between the tip and the workpiece to 5 ~ 25mm is appropriate.Dry stretch the length of the welding current of 250A the following about 5mm above 250A about 20 ~ 25mm more appropriate.