With the transformation of China's large enterprise welding, gas shielded solid Types Of Welding Wires in the metal structure is widely used in manufacturing, such as Taiyuan Heavy Machinery (Group) Company, First Heavy Machinery Co., Ltd., Dalian Heavy Industry Group Co., Ltd., CITIC Yang West Mine Factory, Beijing Factory and other enterprises of coal, gas welding complete welding metal structure of its total weight of 50 to 80% in large-scale enterprises in the metal structure play an irreplaceable role. Gas welding is mainly used for manufacturing large-scale bridge and gantry cranes ,4-23m3 mechanical excavator ,1-6m3 hydraulic excavators, large-scale gasifier and coke oven and other processing equipment and large gear, hoist, pile reclaimer, bar forging equipment, oxygen bottles press, satellite launchers and other large equipment. Gas welding technology in recent years, the application of small and medium enterprises have also made great development.
The early 1980s to the late 1980s, China for the time Q235, 16Mn and other major steel production 490MPa grade CO2 gas shielded solid wires, some self-sufficiency has been achieved, but most rely mainly on gas-shielded welding wire from the United States, Japan, Germany and other countries imports, China's current CO2 gas shielded solid wires has formed a certain scale of production, yield and quality have greatly improved, for Q235, Q345 and Q390 steel structures such as CO2 gas shielded welding solid wires, metal structure manufactured to meet requirements, using the most solid wires are ER49-1 and ER50-6 are two kinds of specifications are φ1.2mm, φ1.6mm two kinds of carbon steel wire production in the domestic oversupply situation, gas shielded arc welding solid wires of very different quality. At present, a certain production scale, quality manufacturers have relatively stable Kam Tai Metal Industrial Co., Ltd., Atlantic Wire Co., Ltd., Yichang Monkey King Copper Alloy Welding Wire Co., Lion Welding Materials Co., Ltd., Changzhou Hua Tong Wire Co., Ltd., Ezhou Special Welding Materials Co., South Tower, Weir Welding Co., Ltd. Harbin. 600MPa high strength steel, stainless steel, aluminum and aluminum alloy solid wires of several manufacturers of quality is relatively stable (such as the Lion Welding Company, South specialty welding company, etc.). More than 700MPa grade high strength steel wire, heat-resistant steel wire manufacturers less (such as Will welding companies, etc.), for 800MPa grade high strength steel, high alloy, high toughness steel and other special steel solid wires is still mainly rely on imports.
In our country the "Plan" and the "Plan" period, my company has with the United States, Germany, Japan and other countries to produce for the national key projects to provide a number of heavy machinery and equipment. In order to better meet the quality requirements of co-products, in the early 1980s, the successful introduction of CO2 gas shielded welding method, in which Japan Panasonic S series gas-welding equipment, nearly 100, the United States Miller CY-650 welder 12. In recent years, technological transformation, respectively, to buy Tangshan Matsushita KR â…¡ 500 welder 50, Euro-hope CPX-500 welder 35 units. Currently, CO2 gas shielded welding method soldered in more than 80%, and has become the primary means of welding, all kinds of wire in the dosage of 200 to 300 tons, a variety of domestic and foreign varieties of solid wire, specifications for the φ1 .2 mm, φ1.4mm, φ1.5mm. Mainly CO2 gas shielding gas. Mixed with a small amount of argon-rich gas. Most of the wire strength of 500 ~ 800MPa structural steel with a wire, as well as stainless steel, heat-resistant steel, hardfacing, non-ferrous metal wire. Before welding wire from Japan, Germany, the Netherlands and other countries imports. In recent years, with the development of China's CO2 welding wire, in addition to co-products, have been entirely made of welding materials, effectively reducing the manufacturing costs.
Conventional Welding Wires is copper production, drawing process using copper rust treatment, but will bring plating, copper plating waste of pollution, environmental pressure, in addition to welding fumes in the high Cu content of toxic substances; spatter large ; poor weld shape; copper layer is easy to peel off, causing the wire feed hose is clogged, affecting the wire. Production of the new wire using Na Shike better. Nashi Ke Corrosion Inhibitor is a water-soluble paste also, drawing production, uniform coating on the wire surface cleaning, drying treatment, drying to form a transparent film, and then using thermoplastic sealed packaging, can achieve the desired anti- rust effect. Corrosion resistance of three months, six months, a four-year and 2 years. The mechanism is: the use of single molecules adsorbed on the metal surface sediment, blocking the metal surface occurs in the atmosphere in the role of micro-batteries, the electrolyte corrosion inhibition occurs. Nashi Ke Corrosion Inhibitor formation is a thin protective film invisible single molecule. Without the removal, metal surface processing to maintain character and self-repair and self-healing function, to prevent the occurrence of localized corrosion and pitting. And copper, the copper is less than the electrochemical corrosion of iron to achieve. Practical applications, the manufacturers drawing lubricant used in accordance with different ways of closing lines, in the original process route, based on the design of alternative anti-rust copper heat treatment methods, and simple and easy. The Nashi Ke Corrosion Inhibitor treatment of wire and Copper Alloy Welding Wire, in the PH, 8.2. Salinity of 1% after 4h treatment, copper wire appeared more dense yellow rust, and rust-treated Na Shike, only a small amount of yellow rust. At the same time saving production cost per ton $ 400. The law makes welding more streamlined business processes and efficient.