Accession Number : ADA954364

Title :   Arc Welding of Alloy Steels. Study of Base Cracks Associated with Effects of Arc Welding Process,

Corporate Author : WATERTOWN ARSENAL MA

Personal Author(s) : Herres,S. A.

Report Date : 12 JUN 1943

Pagination or Media Count : 48

Abstract : To determine factors influencing formation of cracks in the heat-affected zone of arc welded alloy steels. Root cracks (base metal cracks parallel and very close to the fusion zone) occur only when the weld heating and quenching cycle produces a martensitic type structure in the vase metal immediately adjacent to the fusion line. They are observed only when ferritic electrodes with hygroscopic organic type coatings are used. It is demonstrated that root cracks may be eliminated by heating electrodes in an oven immediately before use, presumably driving off absorbed and combined moisture.

Descriptors :   ALLOYS, ARC WELDING, BASE METAL, CRACKS, CYCLES, ELECTRODES, FERRITES, FUSION WELDING, HEAT, HEATING, HYGROSCOPICITY, MARTENSITE, ORGANIC COATINGS, QUENCHING, STEEL, STRUCTURAL PROPERTIES, WELDS, ZONE MELTING

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE