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Tag Archives: Mig Welding Wires
A002 stainless steel welding rod
A002 stainless steel welding line GBE308L-16 rather AWS E308L-16
Mig Welding Wires
Description: A002 is a titanium calcium type coating of ultra-low carbon stainless steel electrode Cr19Ni10. The deposited metal carbon content ≤ 0.04%, has good resistance to intergranular corrosion, good welding performance, drug-resistant red skin, strength, good resistance to porosity. To AC and DC.
Uses: Used for welding low carbon Cr19Ni10 stainless steel structure, can also be used 0Cr19Ni11Ti temperature below 300 ℃ corrosion-resistant stainless steel, mainly used in synthetic fibers, fertilizer, petroleum equipment manufacturing.
Nickel Alloy Welding Wire
Weld metal chemical composition (%) chemical composition CMnSiSPCuNiMoCr
Guaranteed ≤ 0.040.5 ~ 2.5 ≤ 0.90 ≤ 0.030 ≤ 0.040 ≤ 0.759.0 ~ 11.0 ≤ 0.7518.0 ~ 21.0
Mechanical Properties of Deposited Metal pilot project σb (MPa) δ5 (%) to ensure that the value of ≥ 520 ≥ 35
Reference current (AC, DC) electrode diameter (mm) φ2.0φ2.5φ3.2φ4.0φ5.0
Welding current (A) 40 ~ 8050 ~ 10070 ~ 130100 ~ 160140 ~ 200
Stainless Steel Welding Wires
Note:
1. Welding electrodes shall be 200-250 ℃ baking 1h.
2. As far as possible dc power supply, current is not too large.
Energy-saving and environmentally friendly wire rod change
“Work with wire, not only saving work and effort, more importantly, energy is also environmentally friendly!” September 28, Yucheng Chint Machinery Co., Ltd. Manager Rong-hui said.
The company has been engaged in cutting and machining steel parts, electrode material is essential for the company. In the past, with 1000 kg per 100 kg of electrodes have to waste. To this end, the company and guide workers to engage in innovation, the successful production of wire. The new welding material, is small, conductive properties, easy to melt, weld of high quality, smooth surface and aesthetic advantages.
It is understood, the use of welding electrodes from 1.0 to 1.5KG per hour welding consumables, and difficult to control, influenced by the level of welding technology; the use of welding wire 10 to 15KG per hour welding consumables, welding consumables and effective utilization of 95 %.
Welding technology development in several directions
Welding technology has been invented over a hundred years of history, industrial production in a number of important products such as aviation, aerospace and nuclear industries are manufacturing products without welding. Currently, the development of new industries to force welding technology continues to advance and promote the development of the microelectronics industry, such as a micro-connection technology and equipment development; ceramic materials and composite materials development for the vacuum brazing, vacuum diffusion bonding, coating and bonding process development. Therefore, welding technology with the scientific and technological progress and continue to develop, mainly in the following areas:
1 energy
At present, the welding heat source is very rich, such as flame, arc, resistance, ultrasonic, friction, plasma in the electron beam, laser beam, microwave, etc., but the heat of welding research and development does not end, its new development can be summarized into three areas:
The first is the improvement of existing heat source, make it more effective, convenient, affordable, in this regard, the electron beam and laser beam welding of the development of more significant; followed by the development of better, more efficient heat source, using two heat superimposed in order to obtain greater energy density, such as electron beam welding, laser beam, etc. added; third is energy-saving technologies. As the welding energy consumption greatly, so there are a lot of the energy-saving target of new technologies such as solar welding, resistance spot welding in the development of electronic technology to improve the welding power factor and so on.
2 Computer Application in Welding
Arc welding equipment, microcomputer control system, the welding current, welding speed, arc length, and many other parameters for analysis and control of welding procedures and parameters to make changes in display and data retention, which gives the exact quality of welding information. At present the computer as the core of the establishment of various control systems including welding sequence control system, PID control system, optimal control and adaptive control systems. These systems are in arc welding, bonding and brazing of different welding method has been applied. Computer software technology in the welding of more and more to get people’s attention. At present, computer simulation technology has been used for welding thermal process, the process of welding metallurgy, welding stress and deformation of the simulation; database technology is used to create a database file management welders, welding symbols searchable database, welding procedure database, searchable database of welding materials, etc. ; in the field of welding, CAD / CAM applications are in constant development stage, the welding of flexible manufacturing systems have emerged.
3 welding robots and intelligent
Welding robot is revolutionary advances in welding automation, welding it broke the traditional rigid automation, to develop a new way of flexible automation, welding robot’s main advantages are: stability and improve the welding quality to ensure uniformity of welding products ; improve productivity, a day to 24 hours of continuous production; in hazardous environments long-term work to improve the workers’ labor conditions; reduces workers to operate the technical requirements; can achieve low-volume products welding automation; for welding flexible production line to provide a technical basis. To improve the automation of the welding process, in addition to control the automatic tracking of the weld arc, but also real-time control of weld quality, which requires detection of the welding process, welding groove conditions, such as the melting width, penetration and back
Bead shape, in order to be able to promptly adjust the welding parameters to ensure good welding quality, which is intelligent welding. Intelligent welding of the first focus of development in the visual system, which is the key technology is the sensor technology. Although intelligence is still in its infancy, but has broad prospects, is an important direction of development. Expert system for welding engineering in recent years has been more in-depth study at home and abroad, and has launched or prepared to launch some of the commercial welding expert system. Welding expert system is the equivalent of experts with knowledge and experience level, and has the ability to solve the problem of welding the scope of special computer software system. Developed on this basis, the welding quality of computer integrated management system in the welding has been applied, which includes information on the product’s initial testing and data analysis, product quality inspection, sales supervision, the software including databases, expert systems, specific applications of technology.
4 to improve welding productivity
Improve welding productivity is to promote the development of welding technology, a key driver. There are two ways to increase productivity aspects: One is to increase the weld deposition rates. Manual arc welding of iron, gravity welding, welding and other craft lie; in the multi-wire submerged arc welding, hot wire welding fall into this category, the effect is remarkable. For example, three-wire submerged arc welding, the process parameters were 2200AX33V; 1400AX40V1100AX45V, using a smaller cross-section groove, the back of plate or liner ,50-6mm steel plate can be a penetration shape, welding speed to 0.4m/min above, the deposition efficiency is 100 times higher than hand welding. Second, is to reduce the groove cross-section and the amount of deposited metal, the past 10 years the most prominent achievements is the narrow gap welding. Narrow gap welding using gas welding, based on the use of a single wire, double wire or three wire welding. No matter how the joint thickness, can be used docking form. For example, the plate thickness from the 50-300mm, 13mm gap can be designed around, and thus the amount of deposited metal into the required times, reducing the number of times, thus greatly improving productivity. Narrow gap welding of the main key technology is how to ensure both sides of the arc center to ensure penetration and automatic tracking in the groove center line. To address these two problems, developed countries in the world many different options, resulting in a wide variety of narrow gap welding. Electron beam welding, laser beam welding and plasma arc welding, butt joints can be used, and the waves do not open the mouth, it is an ideal narrow gap welding, it is their widespread importance of the important reasons.
State Key Laboratory of Harbin Institute of Welding Technology assessment
Beijing Automotive Research Institute March 12, 10 experts and three staff members on-site evaluation team for HIT Welding Production Technology State Key Laboratory on-site assessment. The assessment of the specific work commissioned by the National Natural Science Foundation of Science and Technology Commission.
It is understood, Harbin Institute of Advanced Welding Production Technology State Key Laboratory approved by the state in 1989, started in 1992, put into trial operation in October 1995 passed the state inspection in 1998 by the State Education Commission’s assessment, 2003 organized by the Ministry of Science and on the first assessment. So far, Harbin Institute of Advanced Welding Production Technology State Key Laboratory has five kinds of automatic welding production line put into production in the factory, in the aerospace business to achieve the project demonstration.
Robot automation in the welding laboratory of computer-aided design and optimization, space surface weld line programming, three-dimensional seam tracking technology has made a technological breakthrough, realize the welding automation products, high quality products for the aerospace, rapid manufacturing provides key technical support.
Britain says China welding technology is mature, “over and over can be made aircraft carrier.”
British “China Defence Today” website has the “ability to build new facilities to provide carrier” in the title, claiming that China will be built in Shanghai Changxing shipbuilding base construction 1 2 5 6-ton medium-sized aircraft carrier, and said the first ship aircraft developed by China is expected to enter the Navy in 2015.
“Today, China’s defense,” explained: before the mid-20th century, all welding technology as an alternative technology for the riveting, split the hull can easily be connected together, so it was a sub-type shipbuilding technology and processes. Ships are built with high-strength low-alloy steel, and steel plate thickness is often thinner than the civilian ships, with ships of the compartment is generally ten times more than the civilian vessels, but also because of the speed and number of complex equipment installation requirements, the steel cutting, bending and welding on both linear high demand.
With civilian vessels in recent years increasingly fierce market competition, the pursuit of efficiency, reduce costs, civilian vessels in the fine have been great breakthroughs in shipbuilding, which in turn promoted the warship construction technology and process development. Such as the U.S. may start construction this year, next-generation aircraft carrier – CVN-21, the study will be allocated a large amount of money CNC laser cutting and welding, eliminating the sub-thick steel plate welding distortion, high-strength steel welding, metal processing demand concept, titanium shipbuilding technology such as composite applications and processes, which is part of the expenses, but also in the construction process similar to using a large number of computers and other sophisticated commercial technology equipment development fee savings to make up.
Which profits from the global support of high-tech to traditional manufacturing industries, in turn, the status of blood transfusion, it is a lot to catch up with the dream of a big manufacturing country.
Heavy machinery to enhance the welding of metal structures soon
Welding technology is the metal structure of heavy machinery and construction equipment manufacturing and installation of one of the key technology, heavy machinery manufacturing industry in industrial countries has been widely used.
Currently, the industrial countries and territories have adopted the welded structure increasing the ratio of increase, in which automation and mechanization of gas welding and multi-wire submerged arc welding processes such as high consumption of welding consumables welding metals accounting for about 50 total % to 70% of its production using mechanized welding, automated and efficient welding processes, welding, high efficiency, good welding quality results for all to see, a strong international competitiveness.
Heavy machinery and welding technology in China and the United States (such as P & H companies), Germany (such as SMS’s, etc.), France (such as VAI, etc.), Japan (such as Mitsubishi Heavy Industries, Komatsu Ltd., etc.) and other enterprises in developed countries there is a big gap.
For a long time, heavy machinery and metal structure of China’s most sophisticated use of domestic and foreign steel, carbon steel series such as Q235, Q345, Q390 series of low-alloy steel, 20g, 16MnR pressure vessel steel. In recent years, with the development of national key projects and product structure adjustment, the type of welded steel varieties increased significantly. Welded structure has its unique advantages, replacing the riveted structure, replacing the cast structure, as heavy machinery industry, the dominant structure of metal structures and equipment.
Metal structure in the heavy machinery industry in China, although the gas-shielded welding, double-wire submerged arc welding, gantry welding, electroslag welding and other welding processes and efficient structure in a large metal manufacturing companies in the growing number of applications, and efficient method to complete the welding of metal structural parts accounted for the total weight of 50% to 80% in small and medium enterprises, CO2 gas shielded solid wires, submerged arc welding and other methods have also been some applications, but, overall, China’s heavy machinery manufacturing labor the advantage of low wages being low productivity, high quality and cost offset by the huge gap, which should lead to business enough attention.
Welding engineering technology to explore new high-strength steel plate welding test success
Yangtze River Seiko Steel (Group) Co., Ltd. Welding Technology Research Institute recently conducted robot automatic welding of high strength steel plate test, and achieved success.
With the large number of high-strength steel plate in the field of steel construction widely used, has brought new developments in welding technology, welding urgent need for new steel production projects for the experimental data for parameter guide. Yangtze River Seiko three aspects of high strength steel plate using a robot for automatic welding test. One plate of 50 mm single-sided “V” shaped groove welding forming principle. Through the “V” shaped groove welding molding trials and research, analysis, the smallest value of the safest groove, narrow gap groove in order to determine the key parameters. Second, the technology for robot welding performance test, to promote the field of automatic welding in steel applications. Third, the robot plate welding procedure qualification, experience as a business technology, applied directly to steel welding engineering in the future.
Earlier, in the National Stadium (Bird’s Nest) steel project in the Yangtze River has been successfully used Seiko made welding robot. The high strength steel plate of the Yangtze River Seiko automatic welding test the robot, in similar enterprises in the steel construction is the first time.
Welding Technology History: Shang Dynasty began in the Spring and Autumn period tomb of Bo
Metal welding applications with the emergence of the ancient methods of welding is cast welding, brazing and forge welding. Chinese Shang Dynasty bronze ax blade made of iron, copper, cast iron and is welded parts, the surface of copper and iron fusion line meandering twists and turns, good bonding. Spring and Autumn period tomb built in the drum seat has many copper dragon is made of sub-brazing.
After analysis, the use of modern soft solder composition is similar.
“Heavenly Creations”
Manufacture of the Warring States period swords, blades of steel, the knife blade is wrought iron, welding is generally made after plus hot forging. According to Ming Sung book “Heavenly Creations” recorded in the book: Ancient Chinese copper and iron into the furnace with heating, manufactured by forged knife, ax; Wong or sieve with a fine spread at the interface of aging on the wall of soil, sub- a large section of calcined welding anchor. Middle Ages, in Damascus, Syria has used forge welding manufacturing weapons.
Ancient long-term stay in the cast welding technology welding, forge welding and brazing level, the use of heat is the fire, the temperature is low, the energy to concentrate, can not be used for large cross-section, long seam weld the workpiece, can only be used making decorations, simple tools and weapons.
Early 19th century, Britain’s Davis found that two kinds of arc and oxyacetylene flame can heat the local high-temperature molten metal; 1885 – 1887, Russia’s other Naerduosi invented the carbon arc pole clamp; appeared in 1900 aluminum heat welding.
Early 20th century, carbon arc welding and gas welding very applied, but also appeared thinner coated electrodes arc welding, arc more stable, by the slag to protect the weld pool, welding quality is improved, the manual metal arc welding into the practical stage, arc welding from the 1920s became an important welding method.
During this period, the United States the use of arc voltage control electrode Noble gave speed, automatic arc welding machine made, making welding mechanization and automation of the start. 1930 American Robin Ivanov invention using the submerged arc welding wire and flux, welding mechanization has been further developed. 40 years, to meet the aluminum, magnesium alloy and alloy steel welding needs, and tungsten inert gas welding melt one after another.
1951 Barton Welding Institute of the Soviet Union to create electroslag welding, a large thickness of the workpiece and efficient welding. In 1953, the Soviet Union Liu Buff Chomsky, who invented the carbon dioxide gas shielded arc welding, gas shielded arc welding to promote the use and development, such as the emergence of a mixed gas arc welding, flux-cored arc welding and gas residue from the Joint shielded arc welding and so on.
In 1957 the United States invented plasma arc welding Gage; 40 years in Germany and France invented the electron beam welding, but also practical and 50′s has been further developed; 60 years appeared laser welding, plasma, electron beam and laser welding method of the emergence of signs a high energy density welding of new development, greatly improved the weldability of materials, many difficult to use other methods of welding materials and structures to be welded.
Other welding techniques as well in 1887, the United States, Thompson invented the resistance welding and spot welding and seam for sheet metal welding; seam welding is a bonding in the first semi-mechanized welding, seam welding process as carried out by two parts Push the wheel forward; the twentieth century, the 1920s started using flash butt welding method of welding rods and chains. At this point resistance welding into the practical stage. In 1956, the United States, Jones invented the ultrasonic welding; the Soviet Union Hill season Cove invention friction welding; 1959, the U.S. success of the explosion welding Stanford Research Institute; the late 1950s the Soviet Union has made a vacuum diffusion bonding equipment.
15 Yetong bus welding process improvement success
Recently, Jiangxi Copper Group Guixi potroom eastward expansion and installation works, 15 the rule of two copper bus bar welding process improvement company success.
Large-scale installation of electrolytic copper busbar installation in the workshop is an important work, but also the electrolysis plant installation and construction of a core technology, has been using a carbon arc welding technology. Although the construction techniques and low cost, but the operation of workers labor-intensive, high-temperature soldering and copper vapor on the human body has certain hazards, welding quality assurance is not easy.
15 Ye two companies from the scientific development, people-oriented principle, in order to encourage enterprises to new technologies, new processes to speed up development, they undertake to Guixi at the beginning of the eastward expansion of the installation after the electrolysis, the focus for improvements copper bus bar welding process, requiring undertake the task of construction of the two O three UNRWA set up a QC team to tackle the problems. After more trial and QC team, from welding, CO2 gas shielded welding, submerged arc welding process, select the submerged arc welding process. Into June, and after trial and QC team to work overtime, from selection of equipment, homemade car, wire, flux, welding process parameters, and finally a complete success. Improved welding quality welding process stability and no visible welding, hot gas and copper vapor, greatly improved the operation of the workers working environment for China 15 Ye added to the copper smelting industry, a core technology.
June 2 Asia stock quotes and dynamic analysis of ethylene glycol
Glycol market basically did not change much, due to end-users to focus on in the PTA industry. Less than 8,000 tons of changes in market supply, only the two end-user purchase two items alone for the price of 535 U.S. dollars / ton (CFR China main port), one of which is bonded cargo.
Many sellers had expected first half of June may be tight supply and strictly control the prices they offer down. Although ‘Made in China’ export slowdown, China’s polyester and textile market is still break even or balanced. Polyester operating rates remain at 70-80%, some as high as 90-100%, while sales remained at a daily production of about 60-80%. The steady increase in product inventory.
Middle East outage rumors plane only to incite the enthusiasm of the market. Worry about the price rise may be unexpected, and some end users begin to shorten holiday supply for first half of June to find disk.
Market observers said that promote inter-market speculators face. Similarly, even if the term may see prices increasing due to excess supply and declining market, the downstream market downturn, these short-term traders with a chance to make quick decisions.