Accession Number : AD0255467

Title :   FLOW OF COPPER BASE FILLER ALLOYS FOR WELDED OVERLAY ROTATING BANDS

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA PITMAN-DUNN RESEARCH LABS

Personal Author(s) : ANTES,H.W. ; EDELMAN,R.E.

Report Date : MAR 1961

Pagination or Media Count : 1

Abstract : An arc melting apparatus was constructed to study the flow of 9 copper bse alloys under imulated arc welding conditions. Arc melted deposits were made on ae 1020 steel plates in Ar, He, and Ar-1/4% O atmospheres. Wetted area was measured from a minimum of four deposits made in a He atmosphere for each alloy. All of the alloys wet about the same amount (approximately 0.7 sq m for a 0.6-g depoit). The wetted area depends on the heat input to the steel base aterial and the heat transfer in the steel. Wetting can be increased by increasing the het input or radial heat flow in the steel base material. Radial flow of the copper deposit occurs apidly and is limited to an area that is bounded by a critical isothem. The location of the critical isotherm s at the extremities of the heat affected zone in the steel. This behavior was observed also for arc welded copper ovelays on 30 mm shell. The presence of arc stabilizers reduces the span of the critial isotherm and thus reduces lateral flow. Surface roughness of the steel base material has little or no influence on the extent of flow. (Author)

Descriptors :   *COPPER ALLOYS, *ROTATING BANDS, ARC WELDING, ARC WELDS, FLUID FLOW, LIQUID METALS, PROJECTILES, STEEL, WELDING, WELDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE