High-Quality Welding Stud Bolt
Materials and Key Performance Characteristics
Common Materials: For general applications, low-carbon steels such as SWRCH15A and ML15AL are often used due to their moderate cost and good weldability. Stainless steel is used in applications requiring corrosion resistance, such as food processing and medical equipment. Aluminum welded studs are used in some lightweight applications. Surface treatments such as galvanizing or copper plating are often applied to enhance corrosion resistance.
Core Performance Characteristics: The connection strength relies on the metallurgical bond. Tensile strength is no less than 400MPa, and yield strength is no less than 240MPa. It can withstand vibration and impact loads and is less prone to loosening compared to traditional bolt connections. Furthermore, the welded joint can form a sealed structure, making it suitable for applications requiring leak prevention.
Key Points of Welding Process
Specialized Equipment: For small-diameter studs of 8mm and below, use an energy storage stud welding machine for fast welding speeds, completing the process in milliseconds. For studs with diameters above 8mm, use an arc stud welding machine paired with a deoxidizing arc heat-resistant ceramic seat ring to ensure stable arc light and weld quality.
Key Process: First, clean the surface of the studs and workpiece, removing oil, rust, and other impurities. Place the ceramic seat ring in the welding position, align the welding torch with the stud, and tighten it. After energizing, ignite the arc to generate high temperature, melting the stud tip and the base material to form a molten pool. Then, tighten the stud against the molten pool, de-energize, and allow it to cool to complete the fixation. Finally, clean the ceramic ring and inspect the weld.
Quality Inspection: Visually inspect whether the studs are vertical and whether the weld is uniform and full. For defective studs, hammer them 15° in the opposite direction of the defect; if the weld does not crack, it is acceptable; otherwise, repair welding is required nearby.
Typical Application Scenarios
Building Engineering: A core connector between steel structures and concrete, such as weld studs on the outer layer of steel profiles in high-rise building stiffeners, strengthening the connection between the steel and the encasing concrete. It is also used in composite floor slabs for bridges and industrial plants, fixing profiled steel sheets, studs, and steel components through penetration welding.
Automotive Manufacturing: Widely used in body frames, engine compartments, etc., to secure body panels, wiring harness brackets, insulation layers, and other components. Welded connections withstand continuous vibrations during vehicle operation, ensuring component stability.
General Equipment: In household appliances such as refrigerators and air conditioners, it is used to secure control panels, compressors, and other components. In electrical control cabinets and server racks, it can securely mount rails and internal components, saving installation space while ensuring a robust connection.
