工艺参数对6005A合金力学性能及粗晶层的影响

Effect of Process Parameters on Mechanical Properties and Coarse Grain Layer of 6005A Alloy

通过化学成分检测、拉伸性能测试、金相组织观察,研究挤压速度和入淬火区温度对在线淬火6005A铝型材力学性能和粗晶层深度的影响。结果表明,6005A合金挤压时其他工艺参数不变,挤压速度越小,合金的抗拉强度和屈服强度越小,断后延伸率有小幅上升;当挤压速度不变时,入淬火区温度越低,抗拉强度和屈服强度越小,断后延伸率略有提升;6005A合金随着挤压速度降低,粗晶层厚度减小;当挤压速度不变时,入淬火区温度越低,粗晶层厚度越小。

The effects of extrusion speed and quenching temperature on mechanical properties and coarse grain layer depth of 6005A aluminum profile are studied by chemical composition test,tensile property test and metallographic structure observation.The results show that the tensile strength and yield strength of 6005A alloy decrease with the decrease of extrusion speed,and the elongation after fracture increases slightly;when the extrusion speed is constant,the lower the temperature in the quenching zone,the smaller the tensile strength and yield strength,and the elongation after fracture is slightly increased.With the decrease of extrusion speed,the thickness of the coarse grain layer decreases.When the extrusion speed is constant,the lower the temperature in the quenching zone,the smaller the thickness of the coarse grain layer.