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从工业生产的不锈钢大型锻件上取样,在应变速率0.01~10s-1、变形温度850~1250℃条件下采用Gleeble-3500热模拟试验机进行了压缩热变形试验,研究了一种高强度奥氏体不锈钢热变形力学行为和再结晶规律,测得热变形激活能为455kJ/mol,并列出了这种高强度奥氏体不锈钢的热变形方程ε=4.173·1016[sinh(α·σp)]4.06exp(-455000/RT).基于动态材料模型建立了其在常见形变量之下的热加工图(Processing Map).试验结果说明,该奥氏体不锈钢具有较高的动态再结晶温度,在1150℃变形能量消耗效率达到最大值0.4.

参考文献

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