Hardness and strength quality control

Hardness Test

Hardness test in aluminium alloy die casting process can effectively assess the mechanical properties of castings, quality stability and surface treatment effect, for optimizing the process and improve product quality to provide key data support.

1. assess the mechanical properties of castings: hardness is closely related to the material's resistance to deformation and wear, is an important index of mechanical properties. Through the hardness test, the wear resistance and compression resistance of aluminium alloy castings can be assessed to ensure that they can withstand the expected mechanical stress and friction in the application and prolong the service life.

2. Detecting the quality stability of castings: in the process of aluminium alloy die-casting, the composition of the material, cooling rate, heat treatment and other factors will affect the hardness of the castings. Hardness test can reflect the impact of these factors on the quality of castings, help verify whether the process is stable, to ensure that the performance of each product in mass production is consistent.

3. Determine whether heat treatment is required: Some aluminium alloy castings require heat treatment to improve strength and hardness. Hardness testing can help determine whether the heat treatment has achieved the desired effect, avoiding performance problems caused by inadequate or excessive heat treatment, and ensuring that the casting reaches the optimal hardness state.

4. Monitoring material defects: Hardness testing can help to identify defects within the material, such as porosity, shrinkage or inclusions. These defects can lead to a localised reduction in the hardness of the casting, making it susceptible to failure in service. Through hardness testing, deviations in hardness in these areas can be detected, which can then be traced and the process improved.

5. Verify the effect of surface treatment: The surface of aluminium alloy castings may need to be treated with anodic oxidation, electroplating, etc. to enhance hardness and corrosion resistance. Hardness testing can verify whether these treatments have achieved the effect of enhancing hardness and ensure the effectiveness of the surface treatment process.

6. Meet customer and industry standards: many customers and industry standards on aluminium alloy die casting hardness have clear requirements, hardness test results are an important basis for assessing whether the product meets these requirements. Through the hardness test, to ensure that the casting quality meets customer expectations, improve product qualification rate and market competitiveness.