What do I need to apply for a work permit for argon arc welding?

Without a separate argon arc welding license, you need to go to the safety supervision bureau or the welding skill training school set up by the safety supervision bureau for skills and safety training in advance. After passing the physical examination in the designated hospital, bring your ID card, one-inch blue-background photo and training fee for centralized training examination. There are two major items: computer answering and actual welding operation.

General welder's operation certificate (special operation certificate for welding and hot cutting) includes covered electrode manual arc welding, TIG welding, secondary shielded welding, air plasma cutting, gas cutting, electro-slag welding, submerged arc welding and other projects.

Argon arc welding, a welding technology using argon as shielding gas. Also known as argon shielded welding. Argon shielding gas is introduced around arc welding to isolate the air in the welding zone and prevent the welding zone from oxidation.

Argon arc welding technology is a kind of welding technology developed on the basis of ordinary arc welding principle. Argon gas is used to protect metal welding materials, and the welding materials are melted into liquid on the welded substrate by large current to form a molten pool, so that the welded metal and welding materials can achieve metallurgical bonding.

Fusion welding and hot cutting operations (electric welding, gas welding, arc welding, electric welding and gas cutting, etc. ) also called work permit. The issuing agency-Work Safety Supervision Administration has the necessary employment certificate. You don't work without a certificate. It is divided into fusion welding and hot cutting operations, pressure welding operations and brazing operations. The certificate is a magnetic card, which is used nationwide.

The operation certificate of special operations personnel is a certificate issued by the State Administration of Work Safety to implement the access filing system for special industries according to the requirements of the Regulations on the Administration of Work Safety in Construction Projects, which can prove that the holder has been trained in professional safety technology, laws and regulations and professional ethics, and registered in the local work safety bureau.

Extended data

Welding technology is mainly used for metal substrates, such as arc welding, argon arc welding, CO2 shielded welding, oxygen-acetylene welding, laser welding and electroslag pressure welding. Non-metallic materials such as plastics can also be welded. There are more than 40 kinds of metal welding methods, which are mainly divided into three categories: fusion welding, pressure welding and brazing.

Fusion welding is a method of heating the workpiece interface to a molten state without increasing pressure during welding. When welding, the heat source quickly heats and melts the interface between two workpieces to be welded, forming a molten pool. The molten pool moves forward with the heat source, and after cooling, it forms a continuous weld to connect the two workpieces into a whole.

Pressure welding is to combine two workpieces in solid state under pressure, which is also called solid state welding. The commonly used pressure welding process is resistance butt welding. When the current passes through the connection end of two workpieces, the temperature there rises due to the large resistance, and when it is heated to a plastic state, it is connected into a whole under the action of axial pressure.

Brazing is a method that uses a metal material with a melting point lower than that of the workpiece as a brazing filler metal, heats the workpiece and the brazing filler metal to a temperature higher than or lower than the melting point of the workpiece, wets the workpiece with liquid brazing filler metal, fills the interface gap, and realizes mutual diffusion between atoms with the workpiece, thus realizing welding.

The weld formed when welding two connectors is called weld. When welding, both sides of the weld will be affected by welding heat, and the structure and properties will change. This area is called the heat affected zone.

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