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),

For manual arc welding "single-sided welding double-sided forming" process according to the method of operation, can be divided into continuous welding method and intermittent arc extinguishing welding method.In low carbon steel and low alloy steel welding the first layer almost always use intermitt

Cold cracking is a more common type of cracking in welding production, which occurs when the weld is cooled to a lower temperature, for low-alloy high-strength steels, around the martensitic transformation temperature. The three elements of cold crack formation are the hardening tendency of the stee

This type of steel as a high-strength welded structural steel, the carbon content is limited to low, usually less than 0.18% carbon mass fraction, and in the design of the alloy composition are also considered weldability requirements, so low carbon tempered steel welding is basically similar to nor