Explanation

oxy-acetylene welding is a manual weld method that uses the flame generated by the combustion of acetylene and oxygen as the heat source. Its flame temperature can reach up to 3150 ° C, which is the highest among various gas flames. The main equipment of oxy-acetylene welding includes oxygen cylinder, acetylene generator (or acetylene cylinder) and welding torch. Compared with arc welding, oxy-acetylene welding has lower flame temperature, more dispersed heat, and it is easy to control the temperature of weld molten pool. This method is suitable for weld thin plates and low melting point metals, and is also convenient for preheating and post heating, so it is often used for repair welding and field construction. However, oxy-acetylene welding also has its disadvantages, including low productivity, large heat affected zone and easy to cause serious deformation. In addition, the microstructure of weld and heat affected zone is usually coarse, resulting in poor mechanical properties of joints. The main process parameters include the strength of the flame and the diameter of the filler welding wire used. These parameters are usually determined according to the thickness of the weldment.

Classification