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采用Gleebe 1 5 0 0热模拟机 ,对喷射沉积Al Fe V Si合金在温度为 35 0～ 5 5 0℃、应变速率为1× 1 0 - 4 ～ 1× 1 0 - 2 s- 1 、最大变形程度为 5 0 %的条件下 ,进行高温压缩热模拟实验研究 .在实验基础上 ,分析了合金高温变形时的变形激活能和应力指数以及流变应力与应变速率、变形温度之间的关系 ,为确定该合金的挤压温度提供了实验依据 .实验结果表明 ,该材料具有较高的应力指数和变形激活能 ,而且在 480℃下具有较低的变形抗力 ,又能保证挤压后产品有较好的力学性能 ,因此 ,可以考虑将挤压温度定在 480℃左右为宜
The Gleebe 1500 thermal simulator was used to simulate the spray deposition of Al Fe V Si alloy at the temperature of 35 0-550 ℃ and the strain rate of 1 × 10-4 ~ 1 × 10-2 s -1 Deformation degree of 50% under the conditions of high temperature compression heat simulation experimental study on the basis of the experiment, analysis of alloy deformation activation energy and stress at high temperature deformation index and flow stress and strain rate, the relationship between deformation temperature , Which provided an experimental basis for determining the extrusion temperature of the alloy.The experimental results show that the material has a high stress index and deformation activation energy, and has a lower deformation resistance at 480 ℃, but also ensure that the extruded product Have better mechanical properties, therefore, may consider the extrusion temperature is set at about 480 ℃ is appropriate