Accession Number : AD0430386


Title :   THE FABRICATION OF BERYLLIUM POWDER FORGING,


Corporate Author : WYMAN-GORDON CO WORCESTER MASS


Personal Author(s) : Orrell,N G


Report Date : Jan 1963


Pagination or Media Count : 48


Abstract : The powder forging process as applied to beryllium is described. About 2000 powder forgings in 18 configurations ranging in weight form 5 to 1200 lb were produced during the past 4 years. Carefully selected Be powder is placed in a can, basically a light-gage welded container of steel, with a design depending on the shape of the finished part and provided with loading and vent ports. The cans are vibrated as the powder is added and about 50% of full density is obtained. The powder cans are retreated long enough to permit the inner mass to reach about 1000 F, at which time out-gassing is completed and the ports are closed by welding. The powder cans are then heated from 4 to 5 hours at 1800 F, transferred to a hydraulic press, and forged in one pass to final shape. After slowly cooling in air the can is removed by pickling or mechanical means and the forging machined to specifications. The mechanical properties of powder forged Be are intermediate between those produced by press sintering and by solid forging. (Author)


Descriptors :   *BERYLLIUM , *POWDER METALS , MATERIAL FORMING , FORGING , POWDER METALLURGY , HIGH PRESSURE , CONTAINERS , QUALITY CONTROL , PARTICLE SIZE , HEATING , DEGASIFICATION , HYDRAULIC PRESSES , HOT WORKING , DIES , MECHANICAL PROPERTIES , TENSILE PROPERTIES , CHEMICAL ANALYSIS , SYMPOSIA


Distribution Statement : APPROVED FOR PUBLIC RELEASE