李恒,田保红,周孟,马紫鹏,景柯,刘勇

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

采用内氧化-快速热压烧结方法制备了Al_2O_3-Cu/25Cr复合材料，利用Gleeble-1500D型热模拟试验机对其进行热变形试验(变形温度为600～900℃,变形速率为0.001～1 s~(-1)),绘制了其真应力-真应变曲线，根据双曲正弦模型计算了复合材料的热变形激活能和本构方程，得到了Al_2O_3-Cu/25Cr复合材料热变形过程的热加工图。结果表明：Al_2O_3-Cu/25Cr复合材料的热变形激活能为287.227 kJ/mol,根据热加工图，确定了复合材料最佳的热加工工艺参数为变形温度为800～900℃、变形速率为0.25～1 s~(-1)。

关键词(KeyWords)： Al_2O_3-Cu/25Cr复合材料;热变形;本构方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071134);; 河南省自然科学基金(232300420089);; 河南省高校科技创新团队支持计划(22IRTSTHN001)

作者(Author): 李恒,田保红,周孟,马紫鹏,景柯,刘勇

DOI: 10.13289/j.issn.1009-6264.2023-0423

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