求翻译：采用机械合金化+热压工艺制备了Cr-9Nb，而后分别在800，1000，1200℃对Cr-9Nb进行了不同时间的真空热暴露，研究了热暴露对Cr－9Nb组织及性能的影响。是什么意思？

By mechanical alloying + hot pressing process to prepare a cr-9nb, then be in 800,1000,1200 ° C cr-9nb vacuum heat exposure for different times to study the influence of thermal exposure on microstructure and properties of cr-9nb.

mechanical alloying + preheat process produced the Nb Cr - 9 respectively, and then in 1200, 800,1000 to Cr °C Nb - 9 for a different time of the study, vacuum heat exposure to the Thermal exposure Nb Cr - 9 organizations and performance.

Used the mechanical alloy + thermo-compression craft to prepare Cr-9Nb, after but in 800,1000,1200℃ has separately carried on the different time vacuum hot exposition to Cr-9Nb, has studied the hot exposition to the Cr-9Nb organization and the performance influence.

+ Hot-pressing process of mechanical alloying preparation of Cr-9Nb, and Cr-9Nb are respectively 800,1000,1200 ¡æ a different period of vacuum exposure, study on the effect of heat exposure on the microstructure and properties of Cr-9Nb.

正在翻译，请等待...