公开(公告)号：US3846903A

公开(公告)日：1974-11-12

申请号：US37902473

申请日：1973-07-13

Applicant: US AIR FORCE

Inventor： RUPERT E ,  MEYER M ,  UHLAND G

IPC: B23K1/00 ,  B23K1/008 ,  B23K35/32 ,  B23K1/04

CPC classification number: B23K35/32 ,  B23K1/0014 ,  B23K1/008 ,  B23K2201/02

Abstract: A process is provided for fabricating a structure by vacuum brazing tantalum alloy elements in which a columbium-vanadium brazing foil is placed between surfaces of the elements to be joined; a coating of yttria powder is applied to surfaces of elements that will be in contact with a tungsten hearth plate and tungsten pellets; the structure is positioned on the tungsten hearth plate in a vacuum heating zone with tungsten pellets disposed on top of the portion of the upper element to be joined so as to exert pressure thereon and control the gap between the surfaces to be joined; the elements are heated under a vacuum in the vacuum heating zone to a temperature sufficient to melt the brazing foil; and after soaking at that temperature for several minutes the elements are gradually cooled to room temperature. The vacuum brazing process is particularly suitable for use in fabricating honeycomb sandwich panels, utilizing tantalum alloy structural elements.

Abstract translation: 提供了一种通过真空钎焊钽合金元件制造结构的方法，其中将铌钒钎焊箔放置在待接合元件的表面之间; 将氧化钇粉末的涂层施加到将与钨炉底板和钨颗粒接触的元件的表面; 该结构位于真空加热区域的钨炉底板上，其中钨颗粒设置在待接合的上部元件的部分的顶部上，以在其上施加压力并控制要接合的表面之间的间隙; 将元件在真空加热区域中在真空下加热到足以熔化钎焊箔的温度; 并在该温度下浸泡数分钟后，将元件逐渐冷却至室温。 真空钎焊工艺特别适用于制造使用钽合金结构元件的蜂窝夹层板。