EP 3494242 A1 20190612 - METHOD FOR MANUFACTURING A STEEL PART, INCLUDING THE ADDITION OF A MOLTEN METAL TO A SUPPORTING PART, AND PART THUS OBTAINED
Title (en)
METHOD FOR MANUFACTURING A STEEL PART, INCLUDING THE ADDITION OF A MOLTEN METAL TO A SUPPORTING PART, AND PART THUS OBTAINED
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES STAHLBAUTEILS, EINSCHLIESSLICH DER ZUGABE EINER METALLSCHMELZE AN EINEM TRÄGERTEIL UND SO HERGESTELLTES TEIL
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE PIÈCE D'ACIER COMPORTANT L'ADDITION D'UN MÉTAL FONDU SUR UNE PIÈCE SUPPORT, ET PIÈCE AINSI OBTENUE
Publication
Application
Priority
IB 2016054686 W 20160803
Abstract (en)
[origin: WO2018025063A1] The invention relates to a steel part including a supporting part (1) and a portion (17) formed by a solder (2; 7), in the form of molten metal (5; 12), on the supporting part (1), forming a heat affected zone (HAZ) (6) thereof and a molten area (21) between the HAZ (6) and the portion (17) formed by the addition of molten metal (5; 2). The supporting part (1) is made of 70-100 % steel with martensitic microstructure, the composition of which consists of: 0.01 % ≤ C ≤ 1.5 %; 0.01 % ≤ N ≤ 0.2 %; 0.2 % ≤ Mn ≤ 1.2 %; 0.2 % ≤ Si ≤ 1.2 %; traces ≤ Al ≤ 0.1 %; traces ≤ S + P ≤ 0.05 %; 5.0 % ≤ Cr ≤ 16.5 %; traces ≤ Ni ≤ 3.5 %; traces ≤ Mo + W ≤ 2.0 %; traces ≤ Cu ≤ 3.0 %; traces ≤ Ti + Nb + Zr + V + Ta ≤ 2 %; traces ≤ Co ≤ 0.5 %; traces ≤ Sn + Pb ≤ 0.04 %; traces ≤ B ≤ 0.01 %; the remainder being iron; and complies with the conditions: A = % Mn + % Ni + % Cu + 30*(% C + % N) - 3*(% Ti + % Nb) ≥ 1.5 %; B= % Cr + % Mo + 5*% V + % W + % Si + % Al ≥ 9 %. The composition of the solder (2; 7) prior to being used consists of: 0.01 % ≤ C ≤ 0.1 %; 0.01 % ≤ N ≤ 0.2 %; 0.2 % ≤ Mn ≤ 2.0 %; 0.2 % ≤ Si ≤ 1.2 %; 15.0 % ≤ Cr ≤ 19.0 %; 6.0 % ≤ Ni ≤ 13.0 %; traces ≤ Mo + W ≤ 3.0 %; traces ≤ Cu ≤ 3.0 %; traces ≤ Co ≤ 0.5 %; traces ≤ B ≤ 0.01 %; traces ≤ S + P ≤ 0.05 %; traces ≤ Ti + Nb + Zr + V + Ta ≤ 2 %; traces ≤ Sn + Pb ≤ 0.04 %; the remainder being iron. The hardness of the HAZ (6) is no more than 20 % lower than that of the rest of the supporting part (1), and the martensite content of the HAZ (6) is no less than 70 %. The molten area (21) has a dilution rate of 50 wt % to 95 wt %, preferably of 75 wt % to 85 wt %. The invention also relates to a finished steel part thus produced, at least one of the portions formed by a process for adding molten metal (5; 12) being a reinforcement element (17; 24, 25, 26) for the supporting part (1; 22).
IPC 8 full level
C22C 38/40 (2006.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
B23K 26/342 (2015.10 - US); B23K 35/0244 (2013.01 - EP KR US); B23K 35/0288 (2013.01 - EP KR US); B23K 35/3086 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP US); C22C 38/008 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/40 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/52 (2013.01 - EP US); C22C 38/54 (2013.01 - EP KR US); C22C 38/60 (2013.01 - EP US)
Citation (search report)
See references of WO 2018025063A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2018025063 A1 20180208; BR 112019001807 A2 20190507; CA 3032268 A1 20180208; CN 109563602 A 20190402; EP 3494242 A1 20190612; JP 2019532816 A 20191114; KR 20190034222 A 20190401; MX 2019001258 A 20190704; RU 2019102734 A 20200731; RU 2019102734 A3 20200731; US 2019160602 A1 20190530
DOCDB simple family (application)
IB 2016054686 W 20160803; BR 112019001807 A 20160803; CA 3032268 A 20160803; CN 201680088331 A 20160803; EP 16757349 A 20160803; JP 2019505413 A 20160803; KR 20197003535 A 20160803; MX 2019001258 A 20160803; RU 2019102734 A 20160803; US 201616321741 A 20160803