Welding is a process in which the material of the workpiece to be welded (same or dissimilar) is combined with atoms to form a permanent connection through heating or pressure or both, and with or without filling materials. So what are the points of stainless steel welding and notes? What electrode is used to weld…
Common gas mixtures are as follows: 1. The advantages of Ar+He argon are very stable arc combustion and minimal spatter. The advantages of helium gas are high arc temperature, large heat input of base metal and fast welding speed. Using argon as the matrix and adding a certain amount of helium, the advantages of both…
Why is thorium tungsten, the most widely used electrode, so popular? Thorium tungsten electrode for argon arc welding tungsten needle has excellent comprehensive performance. Can withstand overload current; Long service life, oxidation resistance, not easy to deformation; Easy to start arc, continuous arc in the welding process, arc stability, not scattered arc. But I’m sure…
Selection of welding joint coefficient Φ welded joint coefficient refers to the butt welded joint strength and ratio of material strength, to reflect due to factors such as weld defects and welding residual stress in welding joint strength is weakened, is a comprehensive reflection of welded joint mechanical properties. The weld joint coefficient shall be…
Heat-resistant steel refers to steel that has both thermal stability and thermal strength under high temperature conditions. Thermal stability refers to the ability of steel to maintain chemical stability (corrosion resistance, non-oxidation) under high temperature conditions. Thermal strength means that steel has sufficient strength at high temperatures. The heat resistance is mainly guaranteed by alloy…
Welding characteristics ① Compared with the fixed pipe, it is easy to operate and ensure the weld quality; ② It can be continuously welded with high efficiency; ③ Additional turning device is required; Welding position ① Vertical welding position: it can ensure good root fusion and penetration, and is suitable for the situation with small…
What is the nature of welding? Welding is a method of joining two separated solids by heating or pressurizing, or by heating and pressurizing. The essence of welding is metallurgical combination, that is to say, the two workpieces are combined by the combination force between atoms, and the crystal structure of the connecting part of…
The bars with high carbon content have been broken many times, such as 45 × steel shaft, which will break in a short time. It is often impossible to find out the cause of the fracture by sampling and metallographic analysis. That is to say, it is far fetched to find some reasons, not the…
Gas welding and gas cutting is to use the heat from combustion of combustible gas and auxiliary gas as heat source for welding and cutting of metal materials. There are many types of flammable gases, such as acetylene, hydrogen, natural gas, and liquefied petroleum gas (LPG) (mainly propane). The most commonly used gas is…
With the rapid development of electric power industry, high parameter and large capacity units are emerging, which can put forward higher requirements for the high temperature creep performance and stress corrosion resistance of steel pipe materials. For this reason, a large number of researches have been carried out in the world’s major industrial developed countries,…
