Molybdenum alloys with improved workability

将钪对钼液优良脱氧能力的初步基础实验结果应用于钼及其合金Mo-0.5% V和Mo-0.1% Nb合金的半连续电弧熔炼过程。研究结果如下：（1）建立了非自耗电极半连续电弧炉熔炼钪钪精矿的工艺。(2)通过该方法熔化的具有少量钪的钼、Mo-0.5%V和Mo-0.1%Zr合金锭通过间歇退火温加工成薄板和/或线材。钪的加入使铸锭具有良好的加工性能。(3)然后，测试Mo-0.5%V合金板的拉伸性能以获得作为不可热处理的钼合金的技术数据。(4)同时，Mo-0.1%Zr合金板材和线材被内部氮化，随后它们被拉伸测试。该合金经热处理后，强度上级优于TZM，且加工性能好。(5)金相分析表明，添加钪的钼合金焊件中无孔洞，而粉末冶金钼焊件中有较大的孔洞，钪是钼焊件的晶粒细化元素。

The results of preliminary fundamental experiment on the excellent deoxidation ability of scandium for the molten molybdenum was applied to the semi-continuous arc melting process of the metal and its alloys, Mo-0.5% V and Mo-0.1 Nb % alloys. Results obtained are as follows:(1) The melting process of molybdeum with scandium by the non-consumable electrode semi-continuous arc melting furnace was established.(2) Molybdenum, Mo-0.5% V and Mo-0.1% Zr alloy ingots melted by this process with small amounts of scandium were warm-worked to thin sheets and/or wire with intermittent annealing. Good workability of the ingots was obtained by the scandium addition.(3) Then, the Mo-0.5% V alloy sheet was tested for tensile properties to obtain technical data as a non-heat treatmentable molybdenum alloy.(4) Meanwhile, the Mo-0.1% Zr alloy sheet and wire were internally nitrided, and subsequently they were tensile tested. A high strength superior to TZM was obtained in this alloy which was easy workable before the treatment.(5) Microscopic examination showed that the no voids were observred in the weldment of molybdenum alloys melted with scandium, while large voids were found in the weldment of P/M molybdenum, and that zironium is a grain refining element of molybdenum weldment.