Accession Number : AD0290635


Title :   VACUUM ARC MELTING OF A TUNGSTEN ALLOY (TUNGSTEN-MOLYBDENUM-COLUMBIUM)


Corporate Author : WESTINGHOUSE ELECTRIC CORP BLAIRSVILLE PA


Personal Author(s) : REIMANN,GEORGE A


Report Date : Oct 1962


Pagination or Media Count : 1


Abstract : A satisfactory melting technique was established for the production of fine-grained, homogeneous, high quality, W base alloy ingots. The 88W-6Mo6Cb alloy originally selected for the program was discarded because of ingot cracking and replaced by a 92W-6Mo-2Cb alloy. The redcution of columbium from 6 to 2% permitted the production of sound 3-1/2 inch diameter ingots, 6 to 9 inches in length. Macroexamination revealed a mixture of fine, equiaxed grains and short, thin columnar grains. Seven ingots of the 92-6-2 composition were extruded successfully at 4000 F, using ratios of 4.4;1, 5.7:1, and 7.5:1. The extruded material was forged and rolled to determine workability. A time, temperature, recrystallization study was conducted on forged specimens of the 92-6-2 alloy. (Author)


Descriptors :   *TUNGSTEN ALLOYS , CRYSTALLIZATION , ELECTRIC ARCS , EXTRUSION , FORGING , GRAIN STRUCTURES(METALLURGY) , MICROSTRUCTURE , MOLYBDENUM ALLOYS , NIOBIUM ALLOYS , ROLLING MILLS , VACUUM FURNACES


Distribution Statement : APPROVED FOR PUBLIC RELEASE