Hot-rolled and normalized steel in low-alloy high-strength structural steel and alloy structural steel species with a low total content of alloying elements, and the mass fraction of carbon is generally less than 0.25%. Therefore, on the whole, the weldability is better. The general strength level i

Many methods of joining stainless steels are able to be applied well to ferritic stainless steels, mainly including.(1) Melt welding By melting the base material and the filler metal after recrystallization so that the two or more materials separated from each other to achieve a complete bond.(2) So

Heat exchanger, as the heat transfer equipment that transfers part of the heat from the hot fluid to the cold fluid between materials, has a wide range of applications in people's daily life and in petroleum, chemical, power, pharmaceutical, atomic energy and nuclear industries. It can be used as in

When welding with tungsten arc welding equipment, the following steps should be followed.① Turn on the main power source, cooling water source and gas source, and check if they are in normal condition.② Switch the switch in the welding power source to the "on" position and the welding changeover swi

Welding can choose AC welding machine, can also choose DC welding machine. When using a DC welder, there are positive and negative connections, taking into account factors such as the welding rod used, the condition of the construction equipment and the quality of the weld.Compared with the AC power

In the welding process, if the carbon dioxide gas in the cylinder contains high moisture, serious porosity will occur during the welding process. So measures should be taken at the welding site to reduce the water content of the gas as much as possible.The methods are as follows.1. Turn the carbon d

High-carbon steel refers to w (C) higher than 0.6% of carbon steel, which has a greater tendency to harden than medium carbon steel, and the formation of high-carbon martensite, more sensitive to the formation of cold cracks.At the same time, the martensite organization formed in the welded heat-aff

High Frequency WeldingHigh-frequency welding uses solid resistance heat as the energy source. The welding uses the resistance heat generated by the high frequency current in the workpiece to heat the surface layer of the welded area of the workpiece to a molten or near plastic* state, followed by th

Computer software systems in the field of welding are mainly used in the following areas: 1.1. Computer simulation techniques including simulation of the welding thermal process, welding metallurgical processes, welding stress and deformation. Welding is a complex process involving the disciplines o

1) Laser power. There is a laser energy density threshold in laser welding, below which the depth of melt is shallow, and once this value is reached or exceeded, the depth of melt increases substantially. Only when the laser power density on the workpiece exceeds the threshold (material dependent),