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| Effect of La
2O3 doping methods on the properties of MR14 plates |
| WANG Guangda1，2，3，ZHANG Danhua2，XIONG Ning2，KUANG Chunjiang2 |
| （1. Central Iron and Steel Research Institute，Beijing 100081, China; 2. Advanced Technology & Materials Co.,
Ltd，Beijing 100081, China） |
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Abstract La
2O3 can refine grain size, pin dislocations, and improve the strength of molybdenum. Rhenium can re‐
duce the ductile brittle transition temperature of molybdenum, improve its strength and elongation performance. In
order to fully utilize the fine grain strengthening effect of La2O3 and further improve the mechanical properties of
MR14 sheet, this article studied the effect of La2O3 doping methods on the properties of MR14 alloy through three
powder mixing processes: solid solid doping, solid liquid reduction doping, and liquid liquid doping. Research has
shown that both solid-liquid reduction doping and liquid-liquid doping can refine grain size, improve microhard‐
ness and room temperature mechanical properties, with small performance differences and a 50% higher elongation
than solid-liquid doped plates.
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Received: 10 December 2023
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2024, Vol. 34 
