Quality Requirements for Aluminum Alloy Forgings and Die-Forgings
Aluminum alloy forgings and die-forgings are widely used in industrial production and engineering construction due to their light weight, good corrosion resistance, favorable plasticity and processability, and abundant raw material resources. Therefore, in the production of aluminum alloy forgings and die-forgings, it is necessary to come up with standardized quality inspection requirements in order to ensure the production quality and efficiency of the products.
Aluminum alloy forgings and die-forgings are subjected to internal and external quality control requirements. The internal quality control refers to the control of product shape, size, cold working performance and surface quality according to the product specifications and performance requirements. External inspection includes chemical composition, tensile strength and welding performance, which are inspected by non-destructive methods such as x-ray or magnetic particle testing.
The quality specifications of aluminum alloy forgings and die-forgings should be based on the product performance requirements and engineering construction specifications. Generally speaking, their product shape, size and cold mechanical properties should meet the requirements of relevant product standards. Their chemical composition should match the requirements in the relevant product standards. The Tensile Strength should also be in accordance with the relevant product standards and the requirements of engineering construction.
In addition to meeting the relevant product standards and engineering construction requirements, aluminum alloy forgings and die-forgings need to meet the following those below medical requirements. The surface quality of products should meet the surface quality requirements of relevant product standards, the surface cracks should be less than 0.3 mm, and the surface should be free of pores, sand holes, slag holes, bumps, slag inclusions and other defects. After welding, the appearance of the weld seam should meet the appearance requirements of product standards, and the height difference and weld seam leveling should meet the welding requirements.
The surface finish of aluminum alloy forgings and die-forgings should meet the requirements stipulated by their relevant product standards. The surface roughness, smoothness and edge shape should be beautiful, without damage or defects. The machined product edge should be stable and crisp after grinding, which should meet the surface requirements of product standards.
In general, the quality of aluminum alloy forgings and die-forgings should be inspected before they are delivered. However, it is necessary to conduct spot checks at various stages of production and carry out non-destructive testing to ensure that the product is up to the standard and can be delivered without defects.
