Friction Stir Welding (FSW) is a new type of solid-phase welding method. It uses a special type of mixing head to insert the workpiece to be welded, and rotates the stirring head at high speed to friction stir the workpiece.

For new structures, the purpose of non-destructive testing and identification includes verifying project quality, handling engineering quality incidents, and evaluating new structures, new materials, and applications for new processes.

Recently, two sets of 600,000 KW coal-fired power plants in Haiyang, Vietnam, which can be built and built by China, have become the first batch of projects to implement Chinese standard NDT testing in Vietnam

When argon arc welding is used to weld austenitic stainless steel, there are many accidental or inevitable factors that cause some poor soldering defects. Analysis of the causes and remedies are a means to improve the yield.

Because the boiler needs to withstand higher temperatures and pressures during use, it is easy to explode, threatening the safety of the society, enterprises and employees, and life safety.

Austenitic stainless steel is one of the most widely used metal materials in petrochemical production, and its welding performance is good, but it is also prone to many problems during the welding process. For example: cracks, joints are not fused, sl