公开(公告)号：WO2021254722A1

公开(公告)日：2021-12-23

申请号：PCT/EP2021/063494

申请日：2021-05-20

Applicant: SSAB TECHNOLOGY AB

Inventor： KESTI, Vili ,  LIIMATAINEN, Tommi ,  HEMMILÄ, Mikko ,  SUIKKANEN, Pasi ,  NYMANN, Erik ,  LIND, Martin ,  NILSSON, Robin ,  PYYKKÖNEN, Juha

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/32 ,  C22C38/38 ,  C22C38/58 ,  C23C2/00 ,  C23C2/40 ,  C23C30/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28 ,  C21D2211/005 ,  C21D8/0426

Abstract: A hot-rolled strip steel product having a chemical composition consisting of, in terms of weight percentages (wt. %): 0.025%-0.070% C, 0%-1.10% Si, 0.50%-2.0% Mn,

公开(公告)号：WO2019145196A1

公开(公告)日：2019-08-01

申请号：PCT/EP2019/051006

申请日：2019-01-16

Applicant: SSAB TECHNOLOGY AB

Inventor： LIIMATAINEN, Tommi ,  HEMMILÄ, Mikko ,  HIRVI, Ari ,  LIMNELL, Teijo ,  SAARINEN, Tuomo ,  ANTOLA, Tuomas ,  LEHTIKANGAS, Pasi ,  KESTI, Vili ,  TIHINEN, Sakari ,  MARTINMÄKI, Saija

IPC: C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C21D6/00 ,  C21D8/02 ,  C21D1/18 ,  C21D9/46

CPC classification number: C22C38/001 ,  C21D1/18 ,  C21D1/20 ,  C21D1/25 ,  C21D6/004 ,  C21D6/005 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/0263 ,  C21D8/0447 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

Abstract: Hot-rolled steel having a yield strength (Rpo. 2 ) of at least 1100 MPa along and/or transverse to a rolling direction which has a chemical composition containing (in mass- %): C: 0.10 - 0.2, Si: 0 - 0.7, Mn: 1.1 - 2.2, Nb: 0 - 0.06, Ti: 0 - 0.15, V: more than 0.03 and ≥0.25, Al: 0.01 -0.15, B: 0.0005 - 0.010, Cr: 0.1 - 1.7, Mo: 0.15-0.8, Cu: 0 - 1.5, Ni: 0.3 - 2.5, P: 0 - 0.015, S: 0 - 0.008 Zr: 0 - 0.2, Ca: 0 - 0.004, preferably N 0-0.01, the balance Fe and unavoidable impurities, whereby a) when 0.1 0.14 and Mo ≥ 0.5 (in mass-%), b) when 0.11 ≤ C 0.11, then Mn≥ 1.3 and Mo ≥ 0.15 (in mass-%) or when C ≥ 0.15 and V 0.03 - 0.11, then Mn > 1.3 and Mo > 0.15 and Nb > 0.02 and Cr+Cu+Ni >1.4 (in mass-%).

公开(公告)号：WO2020201438A1

公开(公告)日：2020-10-08

申请号：PCT/EP2020/059424

申请日：2020-04-02

Applicant: SSAB TECHNOLOGY AB

Inventor： HEMMILÄ, Mikko ,  LIIMATAINEN, Tommi ,  VIROLAINEN, Esa ,  SUIKKANEN, Pasi

IPC: C21D8/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54

Abstract: A hot-rolled steel strip product comprising a composition consisting of, in terms of weight percentages, 0.17 % to 0.38 % C, 0 % to 0.5 % Si, 0.1 % to 0.4 % Mn, 0.015 % to 0.15 % Al, 0.1 % to 0.6 % Cu, 0.2 % to 0.8 % Ni, 0.1 % to 1 % Cr, 0.01 % to 0.3 % Mo, 0 % to 0.005 % Nb, 0 % to 0.05 % Ti, 0 % to 0.2 % V, 0.0008 % to 0.005 % B, 0 % to 0.025 % P, 0.008 % or less S, 0.01 % or less N, 0 % to 0.01 % Ca, and the remainder being Fe and inevitable impurities, wherein the steel product has a Brinell hardness in the range of 420 - 580 HBW, and a corrosion index (ASTM G 101 -04 ) of at least 5.

公开(公告)号：WO2018138270A1

公开(公告)日：2018-08-02

申请号：PCT/EP2018/051971

申请日：2018-01-26

Applicant: SSAB TECHNOLOGY AB

Inventor： LIIMATAINEN, Tommi

IPC: C22C38/12 ,  C21D1/18 ,  C21D1/56 ,  C21D1/60 ,  C22C38/04 ,  C21D8/02 ,  C22C38/06

Abstract: The present invention relates to a hardenable steel, hardened steel components made from the same, and methods for forming the same. The steel contains relatively high levels of molybdenum in comparison to chromium, silicon and manganese, with the molybdenum providing an excellent combination of hardness and impact strength in the hardened steel. The steel can be cold formed then reheat-quenchhardened with water as the quenching agent with no cracking and optionally no tempering. The steels formed have Vickers hardness levels of over 630 Hv10 (e.g. over 700 Hv10), and impact strengths of over 3 J/cm 2 (e.g. over 20 J/cm 2 ).

公开(公告)号：WO2021254719A1

公开(公告)日：2021-12-23

申请号：PCT/EP2021/063421

申请日：2021-05-20

Applicant: SSAB TECHNOLOGY AB

Inventor： KESTI, Vili ,  HIRVI, Ari ,  LIIMATAINEN, Tommi ,  HEMMILÄ, Mikko ,  SUIKKANEN, Pasi ,  NYMANN, Erik ,  LIND, Martin ,  NILSSON, Robin ,  PYYKKÖNEN, Juha

IPC: B32B15/01 ,  C21D8/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/38 ,  C22C38/46 ,  C22C38/58 ,  C23C2/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  B32B15/013 ,  C21D2211/005 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263

Abstract: A hot-rolled strip steel product having a chemical composition consisting of, in terms of weight percentages (wt. %): 0.030%-0.10% C, 0%-1.10% Si, 0.50%-2.0% Mn,

公开(公告)号：WO2020120563A1

公开(公告)日：2020-06-18

申请号：PCT/EP2019/084620

申请日：2019-12-11

Applicant: SSAB TECHNOLOGY AB

Inventor： TAST, Jouni ,  PIKKARAINEN, Teppo ,  LIIMATAINEN, Tommi ,  RYTINKI, Kati

IPC: C21D8/02 ,  C22C38/12 ,  C22C38/14

Abstract: A high-strength steel product comprising a composition consisting of, in terms of weight percentages, 0.02 % to 0.05 % C, 0.1% to 0.6 % Si, 1.1 % to 2.0 % Mn, 0.01 % to 0.15 % Al, 0.01 % to 0.08 % Nb, 0.5 % or less Cu, 0.5 % or less Cr, 0.7% or less Ni, 0.03 % or less Ti, 0.1 % or less Mo, 0.1 % or less V, 0.0005 % or less B, 0.015 % or less P, 0.005 % or less S, and the remainder being Fe and inevitable impurities, wherein the steel product has a microstructure comprising a matrix consisting of, in terms of volume percentages, 40 % to 80 % quasi-polygonal ferrite,20 % to 40 % polygonal ferrite, 20 % or less bainite, and the remainder being pearlite and martensite of 20%or less.The steel product has a yield strength of at least 400 MPa, an ultimate tensile strength of at least 500 MPa, and a Charpy-V impact toughness of at least 34J/cm 2 at a temperature in the range of -50 °C to -100 °C.

公开(公告)号：WO2020099473A1

公开(公告)日：2020-05-22

申请号：PCT/EP2019/081149

申请日：2019-11-13

Applicant: SSAB TECHNOLOGY AB

Inventor： HEMMILÄ, Mikko ,  LIIMATAINEN, Tommi ,  HIRVI, Ari

IPC: C21D6/00 ,  C21D9/46 ,  C21D1/02 ,  C21D1/19 ,  C21D1/22 ,  C21D1/25 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C21D8/02

Abstract: Hot-rolled steel strip having a tensile strength greater than 875 MPa and containing in mass-%: C 0.06-0.12, Si 0-0.5, Mn 0.70-2.20, Nb 0.005-0.100, Ti 0.01-0.10, V 0.11-0.40, whereby the total amount of V + Nb + Ti is 0.20-0.40 Al 0.005-0.150, B 0-0.0008, Cr 0-1.0, whereby the total amount of Mn + Cr is 0.9−2.5, Mo 0-0.5, Cu 0-0.5, Ni 0-1.0, P 0-0.05, S 0-0.01, Zr 0-0.1 Co 0-0.1 W 0-0.1 Ca 0-0.005, N 0-0.01, balance Fe and unavoidable impurities, and having a microstructure at ¼ thickness that is: • at least 90% martensite and bainite with island-shaped martensite-austenite (MA) constituents, preferably at least 95% and more preferably over 98%, the remainder being: • less than 5% polygonal ferrite and quasi-polygonal ferrite, preferably less than 2%, 30 more preferably less than 1%, • less than 5% pearlite, preferably less than 2%, more preferably less than 1%, • less than 5% austenite, preferably less than 2%, more preferably less than 1% so that the total area percentage is 100%.