Duplex steel castings are commonly used in pumps, valves, fluid equipment, ship parts, chemical machinery, and marine engineering equipment, particularly in critical components subjected to corrosion, erosion, and certain loads. Haijin Stainless Steel specializes in precision casting, investment casting, and subsequent CNC machining of stainless steel. We can customize various duplex steel precision castings based on drawings, samples, or operating conditions. Common castable duplex steel grades: Duplex steel combines austenitic and ferritic microstructures, exhibiting high strength and excellent resistance to pitting and chloride ion corrosion. We can develop castings based on customer needs for 2205, 2507, 2304, 2101, 1.4462, 1.4…
Impurities are crucial factors affecting the purity and transparency of the oxide film on stainless steel precision castings. Its thickness, porosity, purity, and sealing quality all directly interfere with the mirror finish of the casting. For example, a higher impurity content in the oxide film reduces its purity and decreases the transparency of the casting. To ensure a mirror finish on stainless steel precision castings, the impurity content in the oxide film must be reduced. Therefore, the thickness, porosity, purity, and sealing quality of the film must be carefully controlled to minimize impact on processing. The impurities in the oxide film of stainless steel precision castings mainly originate from the casting itself, with some coming from the oxidation bath. …
The casting process for producing cast steel parts is advantageous due to its wide range of material applications, allowing for the manufacture of various precision cast steel parts, as well as castings from aluminum alloys, ferroalloys, and copper alloys. For brittle alloys with poor plasticity, such as ordinary cast iron, casting is the only viable forming process. Cast steel parts possess a certain dimensional accuracy, generally exceeding that of ordinary forgings and welded parts. Furthermore, the production cost of cast steel parts is low, offering good overall economic performance, and its energy and material consumption and production costs are unmatched by other metal forming methods. Cast steel has a high melting point…
The development of silica sol precision casting in China is relatively recent. The manufacturing process requires high precision, necessitating a deeper understanding of the process in both theory and practice, and continuous improvement of fundamental professional knowledge. Silica sol precision casting enriches practical experience, streamlining the entire precision casting production process and producing higher-quality products. During the filling process, the foam model needs to be liquefied and decomposed, generating many small-molecule gases and foam ash. These substances…
316 and 304 stainless steel castings are widely used in applications requiring corrosion resistance. They are used in all fields, from construction and medical to food processing equipment. Stainless steel castings are ideal for use in environments with high hygiene requirements. Firstly, they do not react with corrosive acids. Secondly, surgical instruments and tableware made of stainless steel are easy to clean and sterilize. Another reason for using stainless steel is that it does not require powder coating to resist corrosion and can maintain its aesthetic appeal. Of course, although they are called stainless steel castings, wear and corrosion are only a matter of time…
Stainless steel casting is a casting process with little or no cutting. It is an excellent technology in the casting industry with a wide range of applications, suitable for casting various types and alloys. Simply put, the stainless steel casting process uses fusible materials to create a fusible model, which is then coated with several layers of a special refractory coating. After melting and drying to form a monolithic shell, the model is melted away from the shell using hot water or steam. Stainless steel casting offers high dimensional accuracy. The investment casting process is complex, meaning many factors directly affect the dimensional accuracy of the castings. The shell is heated…
With years of experience in various projects, Haijin Precision Casting understands and complies with international material specifications, including but not limited to ASTM, AISI, ANSI, AS, BS, DIN, EN, JIS, KS, ISO, etc.
Measures to prevent oxide inclusions: Strictly control the smelting process, smelt rapidly, reduce oxidation, and thoroughly remove slag. Aluminum-magnesium alloys must be melted under a covering agent. The furnace body and tools should be clean, free of oxides, and preheated; paint should be dried after application. The designed casting system must have stable flow, buffering, and skimming capabilities. An inclined gating system should be used to ensure stable liquid flow and prevent secondary oxidation. The selected coating should have strong adhesion, and slag should form within the casting during pouring without peeling. Measures to prevent hot cracking: Localized overheating should be avoided in the actual gating system to reduce internal stress. The mold and core slope must ensure…
