Welding process of stainless steel seamless steel pipe

Stainless steel seamless steel pipe is a long strip of steel with a hollow section and no joints around it. It is a steel pipe that is resistant to weak corrosive media such as air, steam, and water, and chemically corrosive media such as acid, alkali, and salt. Also known as stainless acid-resistant steel pipe. Seamless steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.

Introduction of stainless steel seamless welding process

The welding principle of stainless steel seamless pipe is gas shielded arc welding, referred to as gas shielded welding or gas electric welding, which uses the arc as a heat source and gas as a protective medium for fusion welding; during the welding process, the shielding gas creates a gas protective layer around the arc, The molten pool is separated from the air to prevent the influence of harmful gases and ensure the stable combustion of the arc; due to the different types and materials of stainless steel, it needs to be determined according to the actual situation. Commonly used stainless steel fusion welding methods include manual arc welding, submerged arc automatic welding, tungsten electrode Inert gas shielded welding, MIG, ion arc welding, etc.

Stainless Steel Seamless Welding Features

1. Seamless laser welding is easy to cooperate with computer numerical control system or manipulator and robot to realize automatic welding and improve production efficiency.

2. The laser can be precisely controlled, the focusing spot is small, it can be positioned with high precision, and precision machining can be realized.

3. The laser energy is highly concentrated, the thermal influence is small, and the thermal deformation is small.

4. Seamless laser welding is non-contact processing and has no external force on the welded parts.

5. The welding process does not pollute the environment, it can be directly welded in the air, and the process is simple.

6. Seamless laser welding equipment can weld high melting point, refractory and difficult to weld metals, such as titanium alloys, aluminum alloys, etc. Welding between certain dissimilar materials can be achieved.

7. The welding spot of seamless laser welding is small, the welding seam is narrow, neat and beautiful, and there is no need for processing or simple processing after welding. The weld structure is uniform, the pores are less, and the defects are less, which can reduce and optimize the miscellaneous parent material. The mechanical strength of the weld is often higher than that of the base metal. The mechanical properties, corrosion resistance and electromagnetic properties of laser welding are superior to conventional welding methods.