The so-called product quality means that the products provided need to comprehensively and reasonably meet product performance and user requirements. The entire processing process from material selection to later stages requires careful preparation and implementation. In the product production process, it also needs to be checked at all levels and measured accurately, so as to ultimately achieve relevant technical indicators in all aspects. Aluminum alloy materials, like most other products, have quality indicators including the following aspects:
1. Chemical composition: Aluminum alloy has improved many aspects of performance due to the addition of alloying elements, and the addition and ratio of different alloying elements have a great impact on the performance of the material. Therefore, the requirements of relevant technical standards or technical protocols must be strictly followed.
2. Internal structure: mainly includes the size, morphology and distribution of grains. The number, size and distribution of the second phase. The amount, size and distribution of metal and non-metal inclusions. Distribution of porosity and gas content, internal cracks and other continuity defects. Metal ripples and streamlines should comply with the relevant requirements of technical standards or technical agreements.
3. Surface quality: In accordance with the requirements of relevant technical standards, the internal and external surfaces should be clean, smooth, and consistent in color. Achieve a certain smoothness. There should be no cracks, abrasions, scratches and corrosion marks, and there should be no bubbles, pores, spots, pockmarks, waves, etc.
4. Performance: According to technical standards or user requirements, reasonable physical, chemical properties, corrosion resistance, mechanical properties, processing performance, and other special performance indicators should be achieved.
5. Dimensional tolerance and geometric accuracy: including the dimensional tolerance of the cross-section and the geometric accuracy of the product (such as curvature, plane gap, twisting, flaring, parallel opening, plate shape, wave, etc.), they should comply with relevant technical standards. and usage requirements.