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利用光学金相显微镜、扫描电镜(SEM)、X射线衍射(XRD)仪和材料试验机分析Be/HR-1和Be/Cu/HR-1不锈钢真空热静压接头扩散区高温形变的组织结构和性能,探讨形变组织结构与压力和性能的关系。研究表明:热静压的作用使试样产生扩散性蠕变和晶界滑动,影响扩散焊区的晶粒大小和金属间化合物的数量;热静压应不得在使基体晶粒最大的临界压力或临界应变量下进行,适当降低压力和缩短时间可减少沿晶生成金属间化合物的数量,提高连接接头质量;Be/Cu/HR-l不锈钢热静压反应扩散生成的新相熔点大大低于原基材,适当降低温度或压力可有效控制连接工件的变形。
The structure of high temperature deformation in Be / HR-1 and Be / Cu / HR-1 stainless steel vacuum hot hydrostatic joint was analyzed by optical microscope, scanning electron microscope (SEM), X-ray diffraction (XRD) and material testing machine And performance, to explore the relationship between deformation organizational structure and stress and performance. The results show that the thermal static pressure causes the sample to have diffusive creep and grain boundary sliding, which affects the grain size and the amount of intermetallic compounds in the diffusion zone. The thermal hydrostatic pressure should not exceed the maximum critical pressure Or critical strain, the appropriate pressure and time can be reduced to reduce the number of intermetallic compounds and improve the quality of joints. The melting point of Be / Cu / HR-l stainless steel produced by hydrothermal pressure reaction is much lower than The original substrate, appropriate to reduce the temperature or pressure can effectively control the deformation of the connection workpiece.