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采用Gleeble 3800热模拟试验机研究了317L-Cu奥氏体抗菌不锈钢在950~1150℃,0.01~10s-1条件下的热变形行为,确定了在该区域的热变形方程.依据动态材料模型建立了317L-Cu奥氏体抗菌不锈钢在不同应变量下的热加工图.结果表明,317L-Cu奥氏体抗菌不锈钢的热变形激活能为483 kJ/mol,不同真应变下热加工图的差异主要体现在失稳区的位置变化,失稳主要以局部流变形式存在.真应变为0.4时,在960~1030℃范围内,应变速率为0.01~0.045s-1的较低温低应变区域,能量耗散效率η值最大为0.46,容易发生动态再结晶,是较优的热加工工艺窗口.

参考文献

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