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Disqualification cause of the mechanical properties of aluminum and solutions

2015-05-11

 ① Aluminum extrusion temperature is too low, too slow extrusion speed, temperature profile at the outlet of the extruder reach the solution temperature, would not achieve the solid solution strengthening effect;

 

Profiles at the outlet of a small wind turbine, wind enough, resulting in slow cooling profile can not be reduced in the shortest possible time below 200 , so that premature precipitation of coarse Mg2Si, so that the solid solution phase decreased, affecting the profile after the heat treatment mechanical properties;

 

Ingot component failure, the ingot of Mg, Si content is not up to standard requirements;

 

Ingot homogenization treatment is not so Ingots Mg2Si precipitated phase can not be re-dissolved in the relatively short period of time squeeze, resulting solution is not sufficient to affect the product performance;

 

Improper aging process, hot air circulation or thermocouple mounting position is incorrect, resulting in inadequate or over-aging aging.

 

 

Solutions

 

Reasonable control of extrusion temperature and extrusion speed, so that profile in the extruder outlet temperature is maintained at a temperature above the minimum solution;

 

Strengthen air-condition, conditional factory atomization cooling device can be installed, in order to meet the minimum requirements for 6063 cooling gradient;

 

Strengthen ingot quality management;

 

Ingot uniform treatment;

 

Reasonably determine the aging process, thermocouples installed correctly, properly placed profiles to ensure the smooth circulation of hot air. 

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