Metal Fluid Equipment: A Precision Combination of Casting and CNC Machining. Metal fluid equipment plays a crucial role in modern industry, widely used in energy, chemical, water treatment, and pharmaceutical fields. This type of equipment typically needs to withstand high pressure, high temperature, or corrosive media, thus placing extremely high demands on its material properties, manufacturing precision, and structural integrity. To meet these stringent standards, casting and CNC machining have become two indispensable core processes in the manufacture of metal fluid equipment. Casting: Shaping the Basic Form of the Equipment. Casting is the first step in the manufacture of metal fluid equipment. It involves injecting molten metal into a pre-prepared…

I. Current Development Status of the Stainless Steel Industry Currently, stainless steel has become an indispensable material in modern industry, with applications spanning construction, petroleum, chemical, food, aerospace, and medical fields. With the development of society, economy, and technology, the application of stainless steel is becoming increasingly widespread. In 2019, global stainless steel production exceeded 50 million tons, with China's production exceeding 29 million tons, accounting for nearly 60% of global stainless steel production, making it the world's largest stainless steel producer. However, the stainless steel industry also faces some problems, such as market supply and demand imbalances, imperfect industry standards, and technological limitations…

I. Definition and Types of Tolerances Tolerance refers to the maximum allowable deviation range of a part, and is one of the indicators for measuring the precision requirements of a part. Although stainless steel has excellent corrosion resistance, some deviations can still occur during processing, therefore tolerance control is crucial. Common tolerance types include ordinary tolerances, limiting tolerances, basic tolerances, and grade tolerances. Ordinary tolerances are those without specific specifications; limiting tolerances are those with specified tolerances; basic tolerances are the tolerance limits for achieving a certain precision grade; and grade tolerances are those specified according to grade standards. II. Calculation of Tolerances…

I. What is Precision Casting of Stainless Steel? In the production of stainless steel products, some products have unusual shapes that cannot be produced using processes like pipe bending. To produce these irregularly shaped products (hollow or solid inside), a process is used: wax mold → sand mold → liquid material filling and molding. Advantages: A variety of styles can be created based on different wax molds. Disadvantages: The precision of the molded blank is not high, and the surface roughness is relatively large. II. Precision Casting Process Flow 1. Making molds according to different product shapes. Molds are divided into upper and lower concave molds, completed through a combination of processes such as turning, planing, milling, etching, and EDM. Concave shapes…

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. …

1. Precision castings are parts formed by pouring molten metal into a mold and then cooling it. There are many casting processes for precision castings, including metal mold casting, pressure casting, investment casting, lost foam casting, and V-process casting, etc. Precision casting produces relatively precise finished parts that require little or no further machining. Furthermore, precision casting can produce castings with complex shapes and thin thicknesses, easily handling both small and large castings. Currently, the world's precision casting industry…