In the early 21st century, it spread into China, and has gradually replaced the traditional argon welding and cold welding of the trend, but in Europe and other developed countries such as Germany, the technology has matured in the 1990s and has developed into a rigorous level of the industrial system. Total is well known, precision welding is different from other parts mold welding, its very strict quality control, and repair parts cycle must be as short as possible. Conventional argon welding heat affected zone of a large, resulting in collapsed around the welding, deformation probability is very high, for high precision welding area of ??the mold must be heated warm-up, at a specific temperature for welding, but also natural temperature annealing, so toss down the cost and time are not accepted by users; and cold welding and welding is not strong and there is loss and other defects.
The argon laser welding and cold welding welding without these deficiencies, it gradually has been widely used. In Germany there are imbalances in industrial development, the most advanced industries are concentrated in West Germany, and technology from the former Soviet Union, East Germany, several industrially developed cities mainly refers to Munich, Frankfurt and Stuttgart and so on. Similarly, the industry pioneer in laser welding are also concentrated in West Germany. In China, the most commonly used laser welding is laser welding in Germany dedicated ghj often, manufacturers in the world-famous industrial city - Stuttgart.
Back in the early 1990s, has been engaged in welding technology, laser repair ghj mold manufacturers have realized the huge market, buy a few German-produced precision laser welding repair of external mold, becoming the first professional to provide precise Germany Laser production of mold remediation service providers, and by constantly try and improve, with metallurgy and cold-drawn technology to produce ghj brand of laser welding. ghj manufacturers have been using their own production of Welding Wire China repair mold, auto mold factory Mercedes-Benz and BMW manufacturers are ghj regular clients. In China, just two years ghj wire market share has reached 60%. Germany also has other brands of wire, but because of the lack of welding experience, its quality has been plagued by doubts, for welding similar to polishing, striae, and through special heat treatment of the mold, there is always quality problems; and some wire manufacturers in East Germany, The production technology is mainly inherited in Russia, wire prices are relatively cheap, but quality is always after the welding process to the end user so bruised and battered.
China's current domestic use wire varied, with 90, # 90, m90, and so on. Some dealers for profit, the stainless steel wire, welding of thin wire pull wire to sell such as a laser, or even pretending to sell German ghj brand wire. As competition in the domestic market is not standardized, leading brand wire has not been fully utilized, which also led to domestic wire quality and mold laser welding technology for a long time does not improve. This Chinese laser repair technology behind the advanced countries die more than a decade one of the reasons. To identify the many ways the German brand of laser welding, mainly in the following ways:
1, welding grinding, no blisters, cracks, black and other poor weld quality, weld hardness consistent with the base material;
2, good quality welding surface of metallic luster, toughness, absorb moisture easily rust, will not rust the wire because of its thick surface coating of rust, or the material close to the stainless steel components, welded or easily prone to trachoma deformation off, or very low hardness. Laser can melt, burn, or vaporize almost all of the material. If you are using Copper Alloy Welding Wire containing heavy metals, or wire coated with anti-rust layer containing toxic ingredients, these gases and vapors may endanger human health. We recommend that the majority of users of laser welding of vigilance, not to use laser welding consumables, laser welding operators to ensure the health, and improve China's technical quality of laser welding mode.
In the early 1950s began to develop gas shielded flux cored Welding Wires already asked the city, but in 1957 began to be widely commercially available. Such an approach can be taken from the submerged arc welding with CO2 (referring to solid) of the advantages of a combination of flux inside and wrapped in wire protection by external CO2 gas welding can produce more soft and stable arc and low spatter its characteristics. Early stage of development only the large wire diameter wire (2.0-4.0mm), for significant parts of the flat welding and horizontal welding. Until 1972, began to develop a small wire diameter wire was greatly expanded the use of flux-cored areas.
Gas-shielded flux cored wire is self shielded flux cored Nickel Alloy Welding Wire in the city was soon asked to be developed but also soon be widely recognized in industry specific purposes.
The biggest difference between the two points in the second unit has been stated, this unit will make the whole discussion.