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Metallurgical factors which may have an effect on the toughness of electroslag (consumable guide) welded joints have been examined in the case of C-Mn steel plates and martensitic stainless steel plates. With such a high heat input welding process, H.A.Z. toughness of C-Mn steels is strongly dependent upon carbon and nitrogen contents both in the as-welded and post-weld heat treated conditions. A reduction of phosphorus content only improves H.A.Z. toughness of post weld heat treated low heat input welds. A low level addition of titanium is beneficial to the H.A.Z. toughness of C-Mn steels with reduced nitrogen contents. The efficiency of titanium additions depends upon the size and distribution of titanium carbo-nitride precipitates. Slag-liquid metal reactions appear to be significantly different from other processes resulting in much reduced exchanges of elements between weld metal and flux. According to thermal analysis tests, martensitic stainless steels behave differently at high temperatures.

Additional information

Authors: DEVILLERS L, IRSID, Saint-Germain-en-Laye (FR);DONADILLE C, IRSID, Saint-Germain-en-Laye (FR);KAPLAN D, IRSID, Saint-Germain-en-Laye (FR);BOURGES P, Creusot Loire Industrie, Le Creusot (FR)
Bibliographic Reference: EUR 11510 FR (1988) MF, 144 pp., ECU 8, blow-up copy ECU 18.75
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