welding rods

( 1 ) easy arc , to ensure stable arc, little spatter during welding .( 2 ) coating melting speed should be slower than the speed of welding core melt to cause flared sleeve ( sleeve length should be less Nickel Welding Electrodes than the welding core diameter ) , is conducive toDroplet and the resulting protective atmosphere ;( 3 ) the proportion of slag should be less than the proportion of molten metal solidification temperature should be slightly lower than the solidification temperature of the slag shell should be easy to take off ;( 4 ) a blend of gold metallurgical treatment effect ;( 5 ) to adapt the position of the welding. var addthis_config = {"data_track_addressbar":true};

Depending on the situation , there are three kinds of welding electrodes classification methods: Classification by welding purposes , according to the main chemical components of drug skin classified , according to drug skin meltedCharacteristics of slag after classification .In accordance with the purpose of welding , there are two forms of expression , one of the original establishment of the Ministry of Machinery Industry , welding can be divided into: structural steel welding rod, Heat-resistant steel electrode, stainless steel welding rod, welding electrodes, low temperature steewelding, Copper Welding Electrodes Cast iron welding rod , nickel and nickel alloy welding rod , copper and copper alloys , aluminum and aluminum alloys and special purpose welding rod . Two as the national standardProvides for the carbon steel electrode , low alloy electrodes, stainless steel welding rod , heap Welding electrodes, cast iron welding rod , copper and copper alloys , aluminum and aluminum alloys . There is no principle difference between the two , the former with a commercial grade , said afterWere expressed by model .If the electrode coating in accordance with the main chemical components to classification, welding can be divided into: titania type electrode , titanium calcium type electrode, ilmeniteMine type electrode , welding rod of iron oxide , cellulose type electrode , low hydrogen typeElectrode, graphite electrode and the base type electrode.If you follow electrode coating melted slag characteristics to classify , welding can be divided into acidic and alkaline welding rod . Acid electrode drug skinMainly composed of acidic oxides such as silica , titania ,Ferric oxide and so on. Alkaline electrode covering the main component of alkaline oxides, such as marble and fluorite .Classification of welding in many ways, by use , respectively , slag basicity , the main component of electrode coating , welding performance characteristics of different anglesFor weldingclassification. By ApplicationChina's current electrode classification is primarily based on national standards and electrode prepared by the Ministry of Machinery Industry " welding material product samples ." Weld Article models according to national standards are divided into eight categories, divided according to purpose electrode grade 10 categories . var addthis_config = {"data_track_addressbar":true};

Electrode welding core and coating by the two parts. Metal welding electrodes in the outer core of the coating ( coating ) uniform pressure applied to carefully solder core. Welding rodDifferent types, welding core is different. Welding electrode core metal core , as Guarantee the quality and performance of the weld , butt in the core content of the metal elements have strict rules, especially harmful impurities ( such as sulfur, phosphorustc. ) content, should be strictly limited, than the base metal . Welding core into Of a direct impact on the composition and properties of the weld metal , Stainless Steel Electrode so the welding core harmful elements as little as possible . Welding carbon steel and low alloy steel welding core , are generally used as a low-carbon steel core wire and fill plus manganese, silicon , chromium, nickel and other ingredients ( see wire StatesHome standard GB1300 -77 ) . For one, using a low-carbon containing Low carbon steel plastic, wire drawing is easier , on the other hand reduce the CO content in the reducing gas , reducing splashing or pores, andIncreased weld metalsolidification temperature favorable for overhead welding . Join itsHis main alloying elements in order to ensure the comprehensive mechanical properties of the weld , while the welding performance and remove impurities, also have a role . High alloy steel as well as aluminum , copper, iron and other metal materials, welded to the core component in addition to the metal to be welded with similar requirements , the same also control the impurityContent , according to process requirements often adding certain alloying elementsElectrode is coated with a drug skin used for SMAW consumable electrode , it is by coating and welding core composed of two parts . In front electrode coatingThere are about 45 ° chamfer , which is to facilitate the arc . In the taiA bare core wire , rod length of about 1/16 , to facilitate welding clamp holding and contribute to conductivity . Diameter of the wire Chung actually refers welding core diameter ) throughOften for 2,2 . 5,3 . 2 or 4, 5 or 6mm , such as several specifications, Used is a small 3.2 , four small , a small 5 three, the length "L" in general between 250 ^ -450 mm . var addthis_config = {"data_track_addressbar":true};

electrode (covered electrode) welding or welding melt filled Stainless Steel Electrode workpiece when the junction metal strip . Welding rod(coveredelectrode), is in the metal core welding outside the paint ( coating ) uniform , to the heartGround pressure applied to the solder core. Welding electrode core metal core , in order to ensure the quality and performance of the weld , butt in the core content of the metal elements areStrict regulations , particularly harmful impurities ( such as sulfur, phosphorus, etc.) Content, should be strictly limited, than the base metal . var addthis_config = {"data_track_addressbar":true};