The core and the drug electrode by the welding of two parts the skin. Metal welding electrode is external to the core coating (drug skin) evenly to carefully applied pressure on the core welding. Different types of welding rod, Welding Electrode core is different. Welding electrode metal core that is the core, in order to ensure the quality and performance of the weld, butt in the core content of the metal elements, there are stringent requirements, especially for harmful impurities (eg sulfur, phosphorus, etc.) content, there should be strict limitations, better than the base metal. Welding core components directly affect the weld metal composition and performance, so the welding core of the harmful elements to minimize welding carbon steel and low alloy steel welding core, low-carbon steel is generally used as a welding core, and fill up the manganese, silicon, chromium, nickel and other ingredients (see the national standard GB1300 an 77 wire). The reason one is low carbon low carbon steel wire plastic, wire drawing easier, on the other hand reducing gas to reduce CO content to reduce spatter or porosity, and increased the temperature of the weld metal solidification, beneficial to the overhead position welding. Other major alloying elements added to ensure the weld mechanical properties, while the welding performance and to remove impurities, also have a role. High-alloy steel and aluminum, copper, iron and other metal materials, its core components in addition to welding and welded metal similar requirements, but also have control of impurities, according to process requirements often adding certain alloying elements. Electrode is coated with a drug for skin melt welding electrodes used in arc welding, it is a drug and the skin-core solder composed of two parts. Drug in the skin are the front electrode of about 45 ° chamfer, which is to facilitate the arc. In the rear there is a bare core welding, welding rod length of about 1 / 16, to facilitate the welding clamp holding and help conduct electricity. Electrode diameter Chung actually refers to Mig Electrode core diameter) is usually 2,2. 5,3 2 or 4, 5 or 6mm and other types of specifications, used a small 3.2 small 4 small 5 three species, its length "L" is generally between 250 ^ -450 mm.
One is based on argon produced by the wire electrode process, strictly speaking, can not be used in laser welding mode; the other is specifically developed for laser welding and laser welding wire special (such as DSI and QUADE laser welding). Use of laser welding is not, so in Germany, only two or three manufacturers of laser welding is a professional manufacturer of laser welding wire. Most other brands of the manufacturers or argon welding electrode manufacturer, laser welding for the production has not yet dedicated professional.
The use of laser welding in China with a wire, from the material points can be divided into the following categories:
1, if you choose the same with the mold base material when the laser welding wire with a metal bar, metal microstructure after melt with the mold base material will be inconsistent, from the impact of welding quality.
2, if you choose stainless steel wire, or close to the laser Mig Electrodes of stainless steel material used, the same problems could occur, and can not guarantee that the hardness after welding. Because less carbon stainless steel, hardness is low, after the welding position welding easy to wear.
3, for different mold materials, the choice of model for the wire not very strict, as long as welding followed by melting the base metal hardness access is good and consistent, we can achieve good weld quality.
4, mainly made of high quality wire and wire imported from Germany and Taiwan CmCtw Moldt series of wire, wire the country lower prices, higher prices of the German wire.
Wire model is commonly used in Germany MOLD 10, MOLD 50, MOLD 55 and MOLD 90.
Taiwan CmCtw wire models are CMC-SDK series, CMC-8407, CMC-MS-3, CMC-PX5, etc.