高温共晶点坩埚耐用性研究  

Research on the durability of high temperature eutectic point crucible

作　　者：孟苏[1,2] 胡艳青 任佳[1] 高祎 崔海佟 MENG Su;HU Yanqing;REN Jia;GAO Yi;CUI Haitong(Changcheng Institute of Metrology&Measurement,Beijing 100095,China;Chinese Aeronautical Establishment,Beijing 100012,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095 [2]中国航空研究院,北京100012

出　　处：《计测技术》2023年第5期83-90,共8页Metrology & Measurement Technology

摘　　要：高温共晶点坩埚因采用石墨材料制作,结构强度较低,在复现试验后易发生破裂,造成高温共晶点的损坏。坩埚耐用性问题已成为制约高温共晶点加入下一代温标的主要障碍之一。为了解决上述问题,本文依据ANSYS对坩埚受力情况进行分析,明确了坩埚主要受力点的理论位置,之后结合多种高温共晶点的实际破裂情况,分析了不同种类共晶点坩埚破裂的原因,并有针对性的提出了两种高温共晶点坩埚改进方案:改进型Hybrid结构和导流盖结构。最后使用改进结构的坩埚灌注了新的高温共晶点/包晶点,复现试验后未出现损坏问题,初步验证了方案的有效性。The high-temperature eutectic point(HTEP)crucible is made of graphite material with low structural strength,so it is prone to fracture after reproducing test,causing HTEP crucible damage.Durability of crucibles has become one of the main obstacles for HTEP to enter the next generation of temperature scale.In order to solve this problem,in this article,the stress situation of the crucible is analyzed based on ANSYS,and the theoretical positions of the main stress points of the crucible are clarified.Then,combined with the actual fracture situation of various HTEPs,the reasons for the fracture of different types of eutectic point crucibles are analyzed.Two improvement plans for HTEP crucibles are proposed:improved Hybrid structure and flow-guide-cover structure.Finally,some new high-temperature eutectic/peritectic points are made by using an improved structure crucible,and no damage issues are found after reproducing test,which has preliminarily verified the effectiveness of the improvement.

关 键 词：高温共晶点 坩埚 受力分析 耐用性 温度计量 

分 类 号：TB942[一般工业技术—计量学]