The article studies the differences in the microstructure,mechanical properties and fracture morphology of molybdenum-tungsten alloy plates with different high tungsten content.The results show that at the annealing tem-perature of 1 500℃,the Mo-50W alloy plate completes grain recrystallization,the Mo-70W alloy plate begins to recrystallize,and the pure tungsten plate grains further grow;the hardness of the molybdenum-tungsten alloy plate increases with the annealing temperature.The increase shows a downward trend.At the same annealing tempera-ture,the hardness value of molybdenum-tungsten alloy plate increases with the increase of W content;the tensile strength of molybdenum-tungsten alloy plate is lower than that of pure tungsten plate at 1 200℃and below,and higher than that of pure tungsten plate at 1 300℃and above.
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