The 11th China International Fluid Machinery Exhibition (CFME) was grandly held at the National Convention and Exhibition Center (Shanghai) from March 7th to 10th. This exhibition attracted more than 600 exhibitors. As a provider of surface repair and remanufacturing of workpieces in the fluid machinery industry, Huirui joined hands with Haoli Valve Industry, a leader in the domestic fluid control equipment manufacturing industry, at booth No.I52 in Hall 1.1H Wonderful appearance.

In view of the application characteristics of laser cladding technology in the fluid machinery industry, Huirui exhibited exquisitely designed mobile laser cladding equipment and the latest technology applications for valve repair and enhancement at this exhibition, which won the approval of exhibition organizers, exhibitors, industry organizations and The visitors spoke highly of it and came to visit and communicate one after another. It received unanimous praise from industry experts and customers, demonstrating Huirui’s comprehensive strength as a leading domestic provider of high-performance metal parts additive manufacturing equipment and technical services.

Application background

Various acid-resistant stainless steel valves are widely used in petroleum, petrochemical, LNG, electric power, and nuclear power plants. Since various media in the production process are highly corrosive and even radioactive, the corrosion result will not only damage the sealing surface of the valve and greatly shorten the service life of the valve, but also the leakage of the medium may cause a shutdown of production, pollute the environment and even cause A vicious accident. Most of the valves retired from the production line fail due to corrosion and scratches on the sealing surface or damage to the internal parts. The strength of the valve body is still strong. This is the premise and basis for valve repair and remanufacturing. Therefore, laser cladding technology has broad applications in this field. prospect.

Defects in traditional craftsmanship

• Welding repair: Enhanced repair cannot be carried out. The workpiece is prone to deformation, cracks, pores, slag inclusions, and other secondary defects. It is only suitable for repairing small local defects. Due to the problem of the combination of the welding material and the surrounding coating, the repaired workpiece will The service life is short.
• Supersonic flame spraying repair: The coating and the substrate are mechanically bonded, with poor impact resistance; poor corrosion resistance, and oxidation resistance; uneven coating structure, and unstable performance.
• Electroplating repair: It can only withstand the load evenly distributed on the surface of the workpiece, and the workpiece is easily damaged under the action of the concentrated impact force; as the thickness of the chromium coating increases, the strength and fatigue strength of the coating also decrease; because the chromium coating has a mesh crack, making it difficult to protect the base metal from corrosion.

Advantages of laser cladding technology

• Increase service life: Laser-strengthened valves have better resistance to friction, wear, erosion, and corrosion, which reduces production shutdown losses caused by valve sealing surface accidents and improves the safety and reliability of the production line.
• Meet the requirements of working conditions: the cladding layer forms a metallurgical bond with the base material, the cladding layer is uniform and dense, and the structure has no defects such as cracks, pores, unfusion, inclusions, and undercuts.
• Good repair flexibility: special materials with specific properties can be designed and configured according to the working conditions of the parts; in addition, cladding repairs can also be carried out on key parts of the parts, which can save a large amount of precious metal materials and even strategic materials.
• On-site partial repair: For large-diameter pipeline valves, traditional repair welding and surfacing repair methods have large heat-affected zones, causing thermal deformation of the sealing parts; laser cladding technology can directly repair local damaged parts of the valve on the pipeline. repair.

HAOLI Group has been deeply involved in the domestic fluid control equipment manufacturing industry for more than 20 years. With its product automation, intelligent production lines, and mature technology, it has been highly recognized by customers. Multiple countries and regions. Choosing Huirui as a partner was mainly due to the fact that Huirui has a relatively complete process system in terms of high-strength workpieces, high wear resistance, and high impact toughness, and has rich cladding practice cases in the fluid machinery industry. The use of Huirui laser cladding technology has greatly facilitated the on-site maintenance of Holi’s large-diameter pipe fitting valves, reduced on-site maintenance costs, improved valve maintenance efficiency, and also improved the service life and safety and reliability of the valves. . ——Recognition and praise from Haoli Group

In the future, Huirui will use its years of professional experience in metal additive manufacturing technology to meet the application needs of various industrial fields, explore and deepen the field of metal additive manufacturing, strive to promote the innovation of manufacturing methods, and provide our customers with high-quality metal additive manufacturing solutions. plans to enable them to quickly achieve high-quality development.