工业化生产中大规格2D70铝合金棒材淬透性的实验方法

采用多路温度控制仪监测材料淬火过程不同部位的温度变化的试验方法，通过对材料硬度和力学性能指标的测试分析，描绘出大规格2D70铝合金棒材截面上距离边部不同距离的硬度和力学性能变化曲线，对比分析了该试验条件和工业化生产条件下合金的硬度和力学性能变化曲线，探讨了本试验方法应用到工业化生产中检测材料淬透性的可能性。研究结果表明，淬火过程中2D70铝合金Ф250mm×250mm的棒材边部和心部的温度基本均匀，淬火过程中总的冷却速率为4℃／s，可满足合金充分固溶的要求，工业化生产的250mm棒材已经完全淬透。

Experiment Method of 2D70 Aluminum Alloy Larger Dimension Bar Hardenability in Commercial Process

The variation curve of hardness and mechanical property with different distance from core of the 2D70 aluminum alloy larger dimension bar has been drawn by monitoring different site temperature changes on the same cross section during quenching process in lab ,and through testing and analyzing hardness and mechanical property of the materials. The same variation curve of the same specification material which produced by commercial process has been described. The curves of different material have been compared and analyzed. The feasibility of the experiment method applied to commercial process product has been discussed. The study shows that the temperature of core and edge on the cross section of the 2D70 aluminum alloy of 250mm×250mm during quenching process is uniform. The general cooling velocity during quenching process is 4℃/s, The sufficiency solution has been occurred. The quenched depth of the alloy is greater than 125mm.