高温高强钨铼合金Gleeble热力模拟试验方法探讨  

Discussion on experimental method of thermal mechanical simulation for high-temperature high-strength tungsten-rhenium(W-Re)alloy with Gleeble system

作　　者：余建新[1] 王晓鹏[1] YU Jianxin;WANG Xiaopeng(Center of Analysis,Measurement and Computing,Harbin Institute of Technology,Harbin 150080,China)

机构地区：[1]哈尔滨工业大学分析测试与计算中心,黑龙江哈尔滨150080

出　　处：《物理测试》2021年第5期20-25,共6页Physics Examination and Testing

基　　金：国家自然科学基金资助项目(51971074)。

摘　　要：钨铼合金具有高熔点、高强度、高硬度、高再结晶温度等特点,作为结构材料广泛应用在特殊高温领域。针对采用Gleeble热力模拟试验机研究新型钨铼合金材料的高温热变形行为,存在热电偶焊接困难、钨铼合金强度高于碳化钨压头等问题,通过埋线法和耐高温无机胶固定热电偶,采用粉末热压烧结工艺制备碳化锆颗粒增强钨基复合材料作为高温高强压头进行解决,获得了钨铼合金在1500℃、应变速率1s^(-1)时压缩真应力-真应变曲线。该方法可用于测量钨铼合金真实高温强度,为钨铼合金工业生产过程中的热变形工艺参数确定提供准确数据。Tungsten-rhenium(W-Re)alloys have the characteristics of high melting point,high strength,high hardness,and high recrystallization temperature.As a kind of structural material,it has been widely used in special high temperature fields.In the process of studying the high-temperature hot deformation behavior of new W-Re alloy materials with Gleeble thermal mechanical simulation system,there are some problems such as the difficulty in thermocouple welding,and the higher strength of W-Re alloy than the tungsten carbide indenter.These problems were solved by the means of embedding wire and high-temperature resistant inorganic adhesive to fix thermocouple,and by employing power hot pressing sintering process to prepare ZrC_(p)/W composite material as high-temperature high-strength indenter.The compression true stress-true strain curve of W-Re alloy at 1500℃and strain rate 1 s^(-1) was obtained.The proposed method was applicable for the measurement of true strength of W-Re alloy at high temperature,and provided accurate data for the determination of thermal deformation process parameters in the industrial production.

关 键 词：钨铼合金 GLEEBLE 热力模拟 碳化锆颗粒增强钨基复合材料 压头 

分 类 号：TG146.411[一般工业技术—材料科学与工程]