Accession Number : AD0715856

Title :   Feasibility Study of Refractory-Base Weld-Backing Materials.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Snyder,George J.

Report Date : OCT 1970

Pagination or Media Count : 36

Abstract : The report describes the investigation of a promising weld-backing method where common, refractory-base mixtures are consolidated into expendable replica preforms of any required joint underside-contour by thermally responsive binders. Such preforms then serve as supporting cushions for the root bead, particularly during arc-side butt-joining operations. Ease of installation before welding and ready removal after welding help to promote simplification of welding cycle, whereas other capabilities of the backing include a mass production method of manufacture and survival of long-term storage with deterioration. In this investigation, the method was applied in conjunction with automatic GMA and GTA processes to the preparation of a series of longitudinal butt welds. Individual effects of operational parameters upon root-bead penetration behavior were explored with each of a wide variety of joint configurations. These were of mild- or low-alloy steel origin, either 1/4, 1/2, or 1 inch in thickness. In each case, fully penetrated deposits were obtained once suitable operational requirements had been established. (Author)

Descriptors :   (*SUPPORTS, WELDING), REFRACTORY MATERIALS, WELDS, FEASIBILITY STUDIES, METAL JOINTS

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE