Mechanical Properties of Submerged Arc Welds with Metal Powder Addition

摘要

The paper deals with welding procedure test results achieved with submerged arc welding (SAW) employing metal powder addition. The test materials were two microalloyed structural steels FeE355HEW and FeE460TM welded with Mn, MnMo and TiB-type consumables. Improvements of 50-100% in productivity were possible without any noticeable loss in the mechanical properties of the welded joints. Sound, fusion and crack-free welds were produced with both methods studied. The decrease of penetration due to metal powder feeding was compensated for by increasing the welding current by 100-200 A above the adequate level for conventional SA welding tested for reference. Charpy-V notch and CTOD tests indicated that the toughness of joints welded with metal powder addition was either improved or remained practically unchanged in comparison with conventional SAW.