Molybdenum alloys with improved workability

将钪对钼液良好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化工艺。结果表明：(1)建立了在非耗材电极半连续电弧熔炼炉上熔化钼与钪的工艺。(2)用该工艺熔出的钼、钼-0.5% V和钼-0.1% Zr合金锭，加入少量钪，经间歇退火温加工成薄板和/或线材。通过加钪，获得了良好的铸锭加工性。(3)然后，对Mo-0.5% V合金板材进行拉伸性能测试，获得不可热处理钼合金的技术数据。(4)同时对Mo-0.1% Zr合金板材和线材进行内氮化处理，并进行拉伸试验。该合金具有优于TZM的高强度，处理前易于加工。(5)金相检查表明，含钪钼合金焊件中未见空洞，而P/M钼焊件中有较大的空洞，锆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.