METHOD FOR PRODUCING A WELDED STEEL BLANK AND ASSOCIATED WELDED BLANK

Abstract: a method for producing a welded blank () includes providing two precoated sheets (), butt welding the precoated sheets () using a filler wire. the precoating () entirely covers at least one face () of each sheet () at the time of butt welding. the filler wire () has a carbon content between 0.01 wt. % and 0.45 wt. %. the composition of the filler wire () and the proportion of filler wire () added to the weld pool is chosen such that the weld joint () has (a) a quenching factor ft: ft−0.9 ft≥0, where ftis a quenching factor of the least hardenable substrate (), and ftand ftare determined: ft=128+1553�c+55�mn+267�si+49�ni+5�cr−79�al−2�ni−1532�c−5�mn−127�si−40�c�ni−4�ni�mn, and (b) a carbon content c<0.15 wt. % or, if c≥0.15 wt. %, a softening factor fasuch that fa≥5000, where fa=10291+4384.1�mo+3676.9si−522.64�al−2221.2�cr−118.11�ni−1565.1�c−246.67�mn.

Inventor(s): Cristian ALVAREZ, Thierry Lizon, Maria Poirier

CPC Classification: B62D21/15 (MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements ; wheels, castors, axles, increasing wheel adhesion ; vehicle tyres, tyre inflation or tyre changing ; connections between vehicles of a train or the like ; vehicles for use on rail and road, amphibious or convertible vehicles ; suspension arrangements ; heating, cooling, ventilating or other air treating devices ; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use ; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards ; electric equipment or propulsion of electrically-propelled vehicles ; power supply for electrically-propelled vehicles ; passenger accommodation not otherwise provided for ; adaptations for load transportation or to carry special loads or objects ; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general ; vehicles, vehicle fittings or vehicle parts not otherwise provided for ; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, ; brake arrangements, brake control systems or parts thereof ; air-cushion vehicles ; motor-cycles, accessories therefor , ; testing of vehicles ))

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