6061T6 Ultra-High Hardness Flat Bar Quenching Process Development
6061T6 aluminium alloy material is widely used,and the market has higher and higher requirements for the hardness of the alloy,so the factory needs to overcome this difficulty.We found that the hardness of the material is closely related to the quenching method,and off-line quenching is better than online quenching.When the extruder outlet is far from the quenching area,the quenching transfer time is longer,and the supersaturation of the solid solution is reduced,resulting in low surface hardness.The coarse crystal on the surface is the secondary cause of the low surface hardness.High hardness 6061T6 aluminium can be obtained by 550℃high temperature solution heat treatment,and the standard recommended 529℃can be used as the solution heat treatment tempera-ture of ordinary hardness 6061T6 aluminium.
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