Dalian castings are workpieces obtained by injecting metal or alloy into the mold through casting technology, solidification, and cooling. It has the characteristics of manufacturing complex shaped parts, low cost, and high material utilization, and is widely used in mechanical manufacturing, construction, automotive, aerospace and other fields. With the continuous progress of technology and the improvement of processes, the production technology and quality level of castings will be further improved, making greater contributions to the development of various industries.
The manufacturing process of castings mainly includes processes such as mold preparation, melting casting alloys, pouring, cooling, demolding and cleaning. Design and manufacture suitable molds based on the shape and requirements of the parts, usually using materials such as sand molds, metal molds, ceramic molds, etc. Then, an appropriate amount of metal or alloy material is melted, usually using equipment such as electric furnaces, gas furnaces, and stoves, and an appropriate amount of alloy elements are added during the melting process to improve the material's performance. Next, pour the molten metal or alloy material into the mold to fill the entire mold and form the desired part shape.
What are the quality inspection methods for Dalian castings?
Visual inspection: By visual observation and comparison, check for defects on the outer surface of castings, such as sand holes, pores, inclusions, cracks, etc. This method is simple to operate and cost-effective, but it can only detect defects on the outer surface and cannot comprehensively evaluate the quality of castings.
Size measurement: By measuring the size of the casting, determine whether its geometric shape meets the design requirements. The commonly used methods for measuring dimensions include straightedge measurement, caliper measurement, and coordinate measurement. This method can comprehensively understand the geometric shape of castings, but is not suitable for detecting internal defects or material issues.
Material testing: By analyzing the material composition and properties of castings, it is determined whether they meet the standard requirements. Common material testing methods include spectroscopic analysis, metallographic analysis, and hardness testing. This method can detect the chemical composition and metallographic structure of castings, but the test results require experience and professional knowledge to interpret.
Physical performance testing: By testing the physical properties of castings, such as tensile strength, hardness, impact toughness, etc., to evaluate whether their mechanical properties meet the requirements. The commonly used physical performance testing methods include tensile testing, hardness testing, and impact testing. This method can directly evaluate the mechanical properties of castings, but the testing equipment and methods require professional equipment and technical support.
Castings have the following characteristics. Castings can manufacture large and complex shaped parts to meet the needs of different fields. Secondly, the cost of castings is relatively low and the production efficiency is high. In addition, the material utilization rate of castings is high, recyclable and environmentally friendly. The performance of castings can be improved through reasonable design and process control, enhancing their mechanical properties and surface quality.
Castings have a wide range of applications in fields such as automotive manufacturing, mechanical manufacturing, and aerospace. In automobile manufacturing, engine blocks, suspension parts, and body parts are all manufactured through casting technology. In the field of mechanical manufacturing, various types of machine tool parts, pump valve parts, bearing seats, etc. are also cast parts.
