Effect of Quenching Cooling Method on Microstructure and Properties of 7A52 Aluminum Alloy Square Pipe
The effects of on-line air cooling quenching,on-line water tank quenching and off-line quench-ing ways on the microstructure and mechanical properties of 7A52 aluminum alloy square pipe with a wall thickness of 5 mm were studied by metallographic observation and room temperature mechanical properties test.The results showed that with cooling method of on-line water tank quenching,the tensile strength of 7A52 aluminum alloy square pipe was 483 MPa,yield strength after fracture was 431 MPa and elongation after fracture was 13％,which could not only meet the strength requirements of products,but also reduce the production cost.
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