Incoloy 825合金管材熱擠壓力研究

Study on Hot-extrusion Pressure for Incoloy 825 Alloy Tube

摘要: 采用Gleeble 1500 熱變形模擬試驗機，研究溫度、應變速率和變形抗力之間的關系，利用主應力法建立Incoloy 825 合金擠壓力的計算公式并計算擠壓力值；利用Deform 有限元軟件模擬合金在擠壓變形中各處的應力和應變速率，研究整個擠壓過程中擠壓力的變化情況。研究結果表明：對比軟件模擬、理論計算以及實際生產(chǎn)數(shù)值，最大擠壓力均出現(xiàn)在擠壓突破階段，理論計算的結果與實際生產(chǎn)的擠壓力差別較小。

Abstract: With the Gleeble 1500 hot-deformation simulation testing machine,the relationship between the temperature, the strain rate and the deformation resistance are investigated. And the computation formula for the extrusion pressure for the Incoloy 825 alloy is set up,and the pressure value is worked out. The changing status of the extrusion pressure during the whole extrusion process is studied by means of simulating the stress and strain rate as present at all points in the said process via the FE software Deform. As a result it is identified that comparing relevant data resulting from the software-made simulation,the theoretical calculation and the actual operation, it is found that all the max.extrusion pressures occur at the breakthrough stages,and that the theoretical extrusion pressure is slightly different from the one as used for actual operation.