氧化物掺杂对钼铼合金板材力学性能的影响  

Effect of oxide doping on mechanical properties of molybdenum‒rhenium alloy plates

作　　者：王广达[1,2] 熊宁[2] 况春江[2] WANG Guangda;XIONG Ning;KUANG Chunjiang(Central Iron and Steel Research Institute,Beijing 100081,China;Advanced Technology&Materials Co.,Ltd.,Beijing 100081,China)

机构地区：[1]钢铁研究总院有限公司,北京100081 [2]安泰科技股份有限公司,北京100081

出　　处：《粉末冶金技术》2025年第2期233-238,247,共7页Powder Metallurgy Technology

基　　金：国家重点研发计划专项资助项目(2022YFB3705400)。

摘　　要：通过在钼铼合金中加入La_(2)O_(3)和ZrO_(2),研究了氧化物掺杂对烧结坯料相对密度以及最终轧制板坯室温力学性能的影响,比较了两种氧化物的不同作用。研究发现,掺杂氧化物可以明显降低合金粉末粒度、细化晶粒,掺杂ZrO_(2)的钼铼合金晶粒尺寸最小,但会因晶型相变降低烧结坯的相对密度。轧制变形可以提高合金板材的硬度和强度,掺杂La_(2)O_(3)的钼铼合金可以获得更高的强度并且塑性几乎不变,掺杂ZrO_(2)的钼铼合金则在强度提高的同时塑性降低。掺杂ZrO_(2)的钼铼合金抗拉强度和屈服强度最大,分别为1034 MPa和888.2 MPa。The La_(2)O_(3) and ZrO_(2) were doped in the molybdenum‒rhenium alloys,the effects of oxide doping on the relative density of the sintered billets and the mechanical properties of the final rolled plates at room temperature were studied in this paper.The results show that,the doped oxide can significantly reduce the particle size of the alloy powders.The grain size of molybdenum‒rhenium alloys doped with ZrO_(2) is the smallest,but the relative density of the sintered billets is reduced due to the crystalline phase transformation.The rolling deformation can improve the hardness and strength of the alloy plates,the molybdenum‒rhenium alloys doped with La_(2)O_(3) can obtain the higher strength with the plasticity almost unchanged,while the molybdenum‒rhenium alloys doped with ZrO_(2) show the increase of strength but the decrease of plasticity.The tensile strength and yield strength of the molybdenum‒rhenium alloys doped with ZrO2 are the highest,which are 1034 MPa and 888.2 MPa,respectively.

关 键 词：钼铼合金 稀土氧化物 陶瓷氧化物 弥散强化 力学性能 

分 类 号：TF123[冶金工程—粉末冶金]