This article provides an overview of domestic and foreign gas shielded Aluminium Alloy Welding Wiredevelopment, gas shielded solid wires in the metal structure of the industry, promote the application status, state gas shielded solid wires trends
Domestic and foreign gas shielded solid wires Development of
Gas shielded arc welding process for its unique advantages, widely used in the manufacturing of industrial countries. Development so far, U.S. gas shielded solid wires roughly 31% of the total welding consumables, Japan 41%, Western Europe 53%. The development of gas protection welding and metal structure manufacturing inseparable. Increasing the proportion of welded structural components, in the United States, Japan, Europe and other developed countries and regions, accounting for about 50% of the total weight of the welding material to 75% of consumption of welding gas shielded arc welding of metallic materials weight. The development of the gas metal arc welding technology, which greatly improved the level of manufacturing technology of the metal structure of the industry.
The China gas shielded solid wires research and development began in the 1950s, but always remain in the research stage. For nearly 10 years, the rapid development of gas-shielded solid wires, the national gas shielded solid wires production of more than 150 companies from countries such as Germany, Sweden, Canada, Japan and Taiwan regions, the introduction of a variety of nearly 50 sets of production equipment, domestic or equipment more than 100 self-developed, the production capacity of an annual output of more than 20 tons. In 2002 the total production of about 150 million tons of welding consumables. Solid wire production of about 250,000 tons, accounts for about 17% of the total amount of welding consumables, but comparison with foreign countries, there is a great gap.
1 gas shielded solid wire application status
1.1 gas shielded solid wire
Gas shielded solid wires associated with the development and growth of the metal structure welding technology, in our country, "the Sixth and Seventh Five-Year Plan" period, the introduction of foreign advanced welding technology and equipment to meet the national key projects of large mechanical equipment manufacturing requirements, technological innovation, the backbone of large machinery enterprises and large metal structure manufacturing enterprises, large metal structure manufactured by multinational companies to cooperate with the United States, Germany, Japan and other countries, the bulk purchase of foreign gas shielded arc welding equipment, welding consumables and equipment, and carry out the welder training. With foreign gas protection welding mature technology and production processes, the formation of gas shielded arc welding a large metal structure industry production capacity, from the metal structure of the industry has fundamentally changed the level of manufacturing technology, and promote the development of our gas shielded arc welding technology. Nearly 10 years since the early 1990s, to the 1992 1st National CO2 welding technology popularization and application sharing sessions "as an opportunity, gas shielded arc welding promote the use of technology in the metal structure industry is booming, gas shielded arc welding technology development and application ability to increase applications from large machinery enterprises extended to small and medium-sized enterprises, large machinery enterprises gas shielded arc welding applications from the cooperation of production, promotion to the ordinary production, gas shielded arc welding equipment, welding consumables, accessories and basic domestic supply, the number of welding equipment, welding materials, protection of gas producers and accessories to seize the market opportunity to grow quickly, and gradually formed a gas shielded arc welding industry in China.
1.2 gas shielded solid wire applications
With the the welding technological transformation of the large backbone enterprise in China, gas shielded Stainless Steel Welding Wireshas been widely used in the manufacture of metal structures, such as Taiyuan Heavy Machinery (Group) Company, First Heavy Machinery Co., Ltd., Dalian Heavy Industry Group Co., Ltd., CITIC Xiyanghe enterprise of mining machinery, Coal Factory, gas shielded arc welding the completed weld metal structure accounted for 50 to 80% of the total weight, in a large metal structure enterprises play an irreplaceable role. Gas shielded arc welding is mainly used for the manufacture of large-scale bridge and gantry crane a ,4-23m3 mechanical excavator ,1-6m3 hydraulic excavators, large-scale gasifier and coke oven processing equipment as well as large-reducer, hoist, stacker reclaimer, bar forging equipment, the oxygen cylinder press, satellite launchers and other large equipment. Gas shielded arc welding technology has made considerable progress in recent years, the application of small and medium-sized enterprises.
The early 1980s to the late 1980s, China Q235, 16Mn structural steel production of 490MPa grade CO2 gas shielded solid wires have been part of the self-sufficiency, but most rely mainly on gas shielded welding wire from the United States, Japan, Germany and other countries. imports, China's CO2 gas shielded solid wires has formed a certain scale of production, productivity and quality have greatly improved the structural steel for the Q235, Q345 and Q390 CO2 gas protection welding solid wires, metal structure manufacturing to meet requirements, using the most solid wire ER49-1 ER50-6 two kinds of specifications mainly φ1.2mm, φ1.6mm two domestic carbon steel wire production in the oversupply situation, GMAW there are big differences in the quality of the solid wire. Currently, a certain production scale, the quality relatively stable manufacturer Kam Tai Metal Industrial Co., Ltd., the Atlantic Welding Wire Products Co., Ltd., Yichang Monkey King Welding Wire Co., Ltd., Lion Welding Materials Co., Ltd., Changzhou Huatong Welding Wire Co., Ezhou the Namtha special welding materials Co., Ltd., Harbin Weir Welding Co., Ltd.. 600MPa grade high-strength steel, stainless steel, aluminum and aluminum alloy solid wire several manufacturers quality is relatively stable the (Lion welding consumables, South Tower, special welding consumables company, etc.). Above 700MPa grade high strength steel wire, less heat-resistant steel wire manufacturers (as Will welding companies, etc.), still rely mainly on 800MPa grade high strength steel, high alloy steel, high toughness steel and other special steel solid wire imports.
In our "Plan" and the "Plan" period, the company has co-production with the United States, Germany, Japan and other countries, the number of heavy machinery and equipment for key state projects. Successfully introduced in the early 1980s in order to better meet the the cooperative product quality requirements, CO2 gas protection welding method, of Japan Panasonic S series gas shielded welding equipment nearly 100 units, Miller CY-650 welder 12 units. In recent years, technological transformation purchased separately Tangshan Matsushita KR â…¡ 500 welder 50, Euro-Greek CPX-500 welder 35 units. Currently, CO2 gas shielded welding process for welding products, accounting for more than 80%, become the primary means of welding production, the annual amount of 200 to 300 tons of all kinds of wire, a variety of domestic and international solid wire varieties, specifications φ1 .2 mm, φ1.4mm, φ1.5mm. The protective gas main CO2 gas. With a small amount of argon-rich gas mixture protection. Most of the strength of the wire to the wire 500 ~ 800MPa structural steel wire, stainless steel, heat resistant steel, hardfacing, non-ferrous metals. Before welding wire mainly imported from Japan, Germany, the Netherlands and other countries. In recent years, with the development of our country's CO2 wire, in addition to cooperation products, has been to achieve full localization of welding materials, and reduce manufacturing costs.