Part sixteen: unqualified mechanical property analysis and quality control method

Part sixteen: unqualified mechanical property analysis and quality control method

Part sixteen: unqualified mechanical property analysis and quality control method

The mechanical properties of aluminum extruded products such as HB and HV do not meet the requirements of technical standards or are very uneven, which is called unqualified mechanical properties.

Main causes of unqualified mechanical properties

1. The main elements of the chemical composition of aluminum alloy exceed the standard or the ratio is unreasonable;

2. The aluminum extrusion process or heat treatment process is unreasonable;

3. Poor quality of aluminum billets or mill finish aluminum profiles;

4. The online quenching did not reach the quenching temperature or the cooling rate was not enough;

5. Improper artificial aging process.

Quality control measures and solution

1. Strictly control the chemical composition according to the standard or formulate an effective internal standard;

2. Use high-quality aluminum billets or mill finish aluminum profiles;

3. Optimize aluminum extrusion process;

4. Strictly implement the quenching process system;

5. Strictly implement the manual aging system and control the furnace temperature;

6. Strict temperature measurement and temperature control.

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