Improve the Welding Rod industry's technology level. Production scale, and in recent years, the reorganization of assets and strong alliance has been formed more than 100,000 tons of annual output electrode Bridge in Tianjin, Tianjin Golden Bridge and Sichuan Atlantic three large electrode production enterprise groups. The annual output electrode [tons or more enterprises] 5. Days, Thai, Chinese Taiwan, the United States Lincoln, Japan's Kobelco also has established in Mainland China, the welding consumables production base. National electrode production over 1 million tons in 2001, the world's total electrode total output of more than 1/4, becoming the first electrode in the world's largest producer of the calendar year, welding rod production are shown in Table 1-1. The proportions of the various types of electrode are roughly: 87 justice of the treaty of ordinary structural steel welding, low hydrogen type structural steel welding treaty 7.59 stainless steel welding treaty 1,4 Free. Electrode varieties, but also the development of imitation by the beginning of the liberation to the independent development of various types of electrode, and can basically meet the need to the Gao pressure containers, ships, offshore platforms from the general machinery and other important .1: Cheng construction. Now officially listed in Welding Electrode material unified product samples species has over 300 kinds, the variety of all types of electrode changes are shown in Table 1-2. China is still the original "first painted and cut" technology batch production diameter ^ (丨.!)? 1.4] 111111 special thin electrode. In product quality from the past can only be used for general welded structure can basically meet the matching of the major domestic construction projects, and still have 10 million tons of welding rod exports. Marine electrode has been made in recognition of China 0 ^ 3, [foot UK, USA and Norway XV and Japan XX and other internationally known classification societies. Carbon steel electrodes, Low alloy steel and stainless steel electrode standard equivalent to the corresponding standard (6 \ 51 from the double six 5.1〗 such as electrode quality indicates that China has reached or close to the international level since 1985. , welding industry has become the national economy is an important and indispensable supporting departments. Of course, an electrode-producing countries, but not the electrode of each electrode of the production of power plant busy reduce costs, and that price, product development, investment, ordinary electrode, resulting in fewer species of special electrodes, the quality has not been able to have a major breakthrough. 2 Some quality high electrode also to rely on imports. Plus colleges and universities to exit most of the areas of research of the Xi-pass welding consumables, scientific research units to reduce the input of the conventional welding consumables developed, wide skull of the large amount of welding consumables and production level gap with foreign countries to further increase. Recently, two pairs join the belly of the World Trade Organization (sector 0> after the new situation, influential companies in the welding rod industry in China already Jian began to realize the seriousness of the situation, active United Nations forces, established in order to achieve technological innovation, improve technological content of products for the 13 standard, enterprise technical center construction. new pharynx technical innovation operational mechanisms to promote the long-term stable and healthy development.
The cross sectional shape of the welding rod Various electrode coating has a certain thickness, usually the drug skin quality factor "electrode drug skin share in the electrode mass ratio. Drug skin quality silk-foot (4): drugs with drug skin leather, quality components the Hui core quality muscle - Skin-like drug quality factor of 3596? 55 it varies with the Welding Electrode drug leather types and the use of purpose, mention Gao welding efficiency Gao efficiency of a large number of iron, iron powder electrode in the drug skin or through drug skin-doped some alloy welding electrodes, drug skin quality factor can be more than 10 096. The following describes the role and composition of the weld core and drug skin. Welding core role is mainly conductive to the formation of the arc at the electrode end. At the same time, the core of welding rely on Arc hot melt, cooling form has a certain composition of the deposited gold dust. At present, the electrode of the hundreds of varieties, but for manufacturing electrode welding core But dozens of species. In order to ensure the deposited gold dust has the required alloy composition, generally through two blending gold method to achieve: one is the use of low-carbon steel core, the transition through the drug skin, this method is mainly used in low-carbon steel electrode, low- alloy steel electrodes and welding electrodes, etc.; Another is the use of the alloy core, drug skin to supplement a small amount of alloy cable, this method is mainly used in stainless steel welding rod, non-ferrous metal electrode and Gao alloy steel electrodes. Of course, this distinction is not absolute, the use of low-carbon steel core, can also be made of stainless steel Welding Rod. But no matter what kind of case, the composition of the solder core directly affect the composition and performance of the deposited metal and therefore requires welding core to try to reduce the harmful content of the cord. With the development of metallurgical industry, butt the control of the content of harmful elements in the core of increasingly stringent requirements, in addition to the usual 3,? Some electrode has asked the welding core control such as, holes, 311. In addition to the cast welding core, core welding, generally in the open hearth, converter, or electric smelting, melting certain alloys can also be used in high frequency furnace and cast ingot after hot rolling, and then pull to the desired size cut off from.