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As a core flow component in fluid machinery, guide vanes are extensively used in critical equipment such as water turbines, pumps, and compressors. Their performance directly impacts the efficiency, stability, and service life of the entire system. These components must withstand complex hydrodynamic loads, material corrosion, and temperature fluctuations, requiring stringent specifications for material properties, structural precision, and surface quality. Casting serves as the primary manufacturing method for guide vanes, involving multiple critical processes including material selection, mold design, melting and casting, heat treatment, and quality inspection. The quality of the casting process directly determines the final product's performance. This article will delve into the technical aspects, process optimization, and quality control of cast guide vanes.

Our company organizes study sessions on the classic works of Kazuo Inamori to cultivate a leadership team that drives high-quality corporate development.

Dalian Jiachuang Metal Manufacturing Co., Ltd., a leading domestic supplier of pump components, recently successfully passed the rigorous certification process of TÜV Rheinland. This marks a significant breakthrough in the company's quality management and international market access, laying a solid foundation for its products to enter the global high-end market.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.

Abstract: This paper systematically analyzes the causes, common processes and locations of sand hole defects in the sand casting process of BB3 type multistage pump bodies in cast steel parts, and proposes targeted solutions. Through literature review and case analysis, it was found that the defects of sand holes mainly result from insufficient strength of the molding sand, design flaws of the gating system and improper operation, and are prone to occur in the molding, core setting, closing and pouring processes. The specific locations include gates, risers, thick parts of castings and inner cavities. By optimizing the proportion of molding sand, improving the design of the gating system and strengthening process control, the occurrence rate of sand holes can be effectively reduced and the quality of castings can be improved.

At present, the company is mainly to pump valve, blower, compressor, steam turbine, propeller and other fluid mechanical parts casting, Covering oil, petrochemical, shipbuilding, coal chemical industry, water treatment, gas control, automobile manufacturing, cement, spraying, printing, LNG, power and other fields of main engine device components, Including GB, ASME / ASTM, EN, ISO, JIS, Including ordinary carbon steel, austenitic stainless steel, ferrite stainless steel, martenitic stainless steel, precipitation hardened stainless steel, double-phase stainless steel, Lewmet, Inconel, Incoloy, Hastelloy, and Monel and other nickel-based alloys, Cr26, Ni-hard and other anti-wear white mouth cast iron, involving corrosion-resistant, wear-resistant, high-temperature resistance and other high-end materials.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.

Recently, Dalian Jiachuang Metal Manufacturing Co., Ltd. (hereinafter "Jiachuang Metal") has made a critical breakthrough in sand casting of steel casting impellers—the core of OH pumps—via independently developed patents.

In order to comprehensively enhance the all-round capabilities of employees, consolidate the foundation of the company and assist in the steady implementation of strategic goals, the company has carried out multiple training sessions covering core areas such as safety management, professional skills, management skills, quality system, and information management. The training scope for the year 2025 covers employees from various departments, with a doubling of training time and the number of participants is three times compared to the same period last year, achieving a breakthrough in both training scale and effectiveness, injecting strong momentum into the company's high-quality development.

With the release of their 2025 semiannual reports, statistics compiled from 12 internationally renowned pump companies show that their total sales in the first half of 2025 reached approximately RMB 150.8 billion, a 19.2% year-on-year increase compared to RMB 126.46 billion in the same period last year. Of these 12 companies, only one achieved strong double-digit growth, while ten saw year-on-year increases.