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How much do you know about welding materials? Super full inventory not to be missed!
Release time:
2023-08-11 20:04
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1. galvanized sheet
galvanized sheet should be a common welding material. The gasification temperature of zinc is far lower than the melting point of steel, so it will be easier to shape and weld during welding. Of course, it is precisely because of this that galvanized sheet will also have defects in the welding process. Zinc continues to evaporate, and the resulting steam will enter the weld, forming pores or undercuts. Suitable for laser welding.
2. stainless steel
stainless steel material we are also often heard, in the welding materials generally include austenitic stainless steel, ferritic stainless steel, and martensitic stainless steel.
1. Austenitic stainless steel
Austenitic stainless steel has better welding performance, low thermal conductivity but high absorption rate, fast welding speed and small heat input when applied to laser welding. Austenitic stainless steel is more used in the Cr-Ni series of stainless steel welding operations, while welding austenitic stainless steel more laser welding method, effectively avoid its deformation and residual.
2. Ferritic stainless steel The advantage of
ferritic stainless steel is its toughness and good ductility. In the welding process, the influence is small, such as austenite and martensite may produce cracks in laser welding, but ferrite effectively reduces this possibility.
3, martensitic stainless steel
martensitic stainless steel may be a little strange to everyone, because the performance of martensitic stainless steel is far inferior to austenitic stainless steel and ferritic stainless steel. Cold cracking often occurs when welding with martensitic stainless steel, and the welding effect is not ideal. Some of the lower requirements, low-cost welding projects are occasionally used, the frequency of use is not high.
3. alloy steel
alloy steel is also prone to cold cracks when welding, but the advantage is that it can be directly welded at room temperature and has a large hardness. For some applications with strict hardness requirements, alloy steel welding is a good choice. For the welding of alloy steel, laser welding method is mostly used. Some car transmissions, and even parts of aircraft engines, are welded to alloy steel.
Key words:
Welding materials
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How much do you know about welding materials? Super full inventory not to be missed!
Tens of millions of welding materials, what do you know in detail? Many small partners consult Xiaobian about the characteristics of some welding materials, as well as the application of some common materials and so on. After collecting and sorting out these problems, it is found that in fact, we do not have a very good understanding of some common welding materials, and even there are some misunderstandings. Today, Shuanghua welding and cutting will make a comprehensive inventory of common welding materials, and those who want to know must not miss it ~
Considerations for Welding Materials (Electrodes, Wires and Submerged Arc Flux)
1. Welding rod (1) Stainless steel welding rod usually has two kinds of titanium calcium type and low hydrogen type. Welding current as far as possible the use of DC power supply, is conducive to overcome the welding rod redness and penetration. The electrode of titanium calcium type drug skin is not suitable for all-position welding, only suitable for flat welding and flat fillet welding. The electrode of low hydrogen type drug skin can be welded in all positions.
Considerations for Welding Materials (Electrodes, Wires and Submerged Arc Flux)
1. Welding rod (1) Stainless steel welding rod usually has two kinds of titanium calcium type and low hydrogen type. Welding current as far as possible the use of DC power supply, is conducive to overcome the welding rod redness and penetration. The electrode of titanium calcium type drug skin is not suitable for all-position welding, only suitable for flat welding and flat fillet welding. The electrode of low hydrogen type drug skin can be welded in all positions.
Maintenance of welding materials
1. The welding material warehouse shall be kept at a suitable temperature and humidity, with a temperature of ≧ 5 ℃ and a relative humidity of ≦ 60%. The room shall be kept clean and dry, and harmful media shall not be stored. Every day after work, before work temperature and humidity inspection (not less than twice a day) and record.
Principles for selection of welding materials
The welding materials shall be selected according to the chemical composition, mechanical properties and welding performance of the base metal and in combination with the structural characteristics, service conditions and welding methods of the pressure vessel, and shall be determined through tests if necessary.
Application of Welding Materials
Electrodes can be divided into two categories: acid electrode and alkaline electrode. The acid electrode commonly used in production is titanium calcium electrode, and the alkaline electrode is low hydrogen electrode mainly composed of carbonate and fluorite. Acid electrode arc is more stable, strong adaptability, AC and DC welding machine can be applied, but the mechanical properties of the weld is general, crack resistance is poor. Alkaline electrode arc ignition is more difficult, arc is not stable, poor adaptability, only suitable for DC arc welding machine, but the mechanical properties and crack resistance of the weld is better, suitable for medium carbon steel, high carbon steel welding.
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