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    • 2. 发明专利
    • Steel plate and method of manufacturing the same
    • AU2018430608B2
    • 2021-02-04
    • AU2018430608
    • 2018-08-20
    • NIPPON STEEL CORP
    • TAKAMINE FUMITOSHIFURUYA HITOSHIKAWABATA NORIMASAMIYAKE TAKUMI
    • C21D8/02
    • (12) ]i 8$ - t'~ T] 40 ;1 J IT d- 51 (19)tl- [ J r i i ( (10) (43) P9Wm> PIHWO 00 398A 2020*2f 27H(27.02.2020) WO 2020/039485 A1 (51) ;'t &I-: -I-IN(FURUYA Hitoshi); T1008071 ANVF C22C 38/00 (2006.01) C22C38/54(2006.01) It F9 E: A ) T F1 6 * 1 -q V H 1; 4 C21D 8/02 (2006.01) AgToh Tokyo (JP). )II ai #IIE(KAWABATA (21) 2 PCT/JP2018/030676 Norimasa); T1008071 A T :7 It flJ 0) TF1 6*1 -q ftH ]A iT Tokyo (22)IiH RtJ : 2018l8) A20H(20.08.2018) (JP)_ -- A tf (MIYAKE Takumi); ~T1008071 (26) pf 0 l: H $H IMA 4 $1 Tokyo (JP). (71)t AX:H a 4% (NIPPON STEEL (74) tiXA : 44 | At, (TANAI Sumio et al.); CORPORATION) [JP/JP]; T1008071 WA#+ T 1006620 W 32TT S :7 I E T IF E Ao T H 6 * 1 - Tokyo (P). 9 2 Tokyo (P). (81)tt(0t\IR) 0t0i t (72)#HB3#:ih d$ 5k (TAKAMINE Fumitoshi); t A GMT U ~i~1008071 ~~ ~ ~ 9 fibST t EM TE6) : AE, AG, AL, AM, AO, AT, AU, AZ, T1008071 3 0:7 I 4 $X:A0 T 6 ( - BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, 1 -q ft E 21tW-4PTok yoJP). tr (54) Title: STEEL SHEET AND PRODUCTION METHOD THEREFOR (54) RME P 0) -: ]t4)1 J t OYiWAtm - 13 12 1mm . . . .5mm co - 5rnhf 1mm 12 13 IC(57) Abstract: One embodiment of the present application pertains to a steel sheet having a chemical composition that falls within a prescribed range, wherein: the central part of the steel sheet in the thickness direction contains martensite and bainite in a total area fraction of at least 99%; in the central part in the sheet thickness direction, the average value of en. 4 prior austenite grains is less than 80 pm, Ceq equals 0.750%-0.800%, Al x N is at least 2.0 x 10- , Ti/N is at most 3.4, and 4 x f > 9.00 is satisfied; in the central part in the sheet thickness direction, the three point average of a C-direction Charpy test is not less than 47 J at -20°C; and a surface layer W O 2020/039485 A 1 ||||||||||||||||||||||||||||||||||1|1||||||||||||||||||||||||||||||||||||| CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) L\(0 pU) & Jgg Jg A fib): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), .a-5 7 (AM, AZ, BY, KG, KZ, RU, TJ, TM), - ' (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, Fl, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). and the sheet-thickness-direction central part have an HB hardness of at least 350 and a sheet thickness of over 200 nun. t /+-f 4 R &y /1Z^t f 4 ) V111 -6--t [MAR% *- 9 9 % L), - T 'J 4 M FP Ij L t, I El tJ 7 t -f 0 $), CeqbC0. 750-~0. 800%T& '), AIX N bC 2. O X 1 0 L'.),L C ), T i / N bC 3. 4.0L' -F -b, 4 X f 9. 0 0 4B4 6a&5 Tff-, E~ rPj 8: t6 - 2 0°'C T 0) C 2rdJ np J E° - 0 3 15itbC 4 7 J L),T ), -eb Y -rB 1-0 So& h f-FPb N) kb H B T 3 5 0 L),kLT M,b $ bM 2 0 0 m m M T 76.o
    • 3. 发明专利
    • METHOD FOR MANUFACTURING Ni-CONTAINING STEEL HAVING EXCELLENT SURFACE QUALITY
    • 制造具有优异表面质量的含镍钢的方法
    • JP2009074123A
    • 2009-04-09
    • JP2007243062
    • 2007-09-19
    • Nippon Steel Corp新日本製鐵株式会社
    • SAITO NAOKIFURUYA HITOSHI
    • C21D8/02C22C38/00C22C38/08C22C38/58
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing a Ni-containing steel, which prevents surface flaws from being produced on the steel sheet originating in AlN in boundaries among former γ-grains having existed in a material to be heated and rolled, in order to reduce a load of a caring process for surface flaws on the Ni-containing steel sheet, which is an obstacle for production in a manufacturing site.
      SOLUTION: The method for manufacturing the Ni-containing steel comprises the steps of: preparing a slab as a material to be rolled, which comprises, by mass%, 0.03 to 0.2% C, 0.02 to 0.5% Si, 0.3 to 2.0% Mn, 0.0005 to 0.02% P, 0.0001 to 0.006% S, 1.0 to 10% Ni, 0.01 to 0.08% Al, 0.002 to 0.006% N, 0.0005 to 0.004% O and the balance Fe with unavoidable impurities, and includes former austenite grains with an average diameter of 500 μm or smaller in a layer 2 to 20 mm deep from the surface layer; heating the slab at 1,000 to 1,180°C; and rolling the slab.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 解决的问题:提供一种制造含镍钢的方法,其防止在存在于待加热材料中的前γ粒子之间的边界中源自AlN的钢板上产生表面缺陷, 轧制,以减少在制造现场制造的障碍物的含Ni钢板上的表面缺陷的照料工艺的负荷。 解决方案:制造含Ni钢的方法包括以下步骤:制备作为轧制材料的板坯,其质量%为0.03〜0.2%的C,0.02〜0.5%的Si,0.3〜 2.0%Mn,0.0005〜0.02%P,0.0001〜0.006%S,1.0〜10%Ni,0.01〜0.08%Al,0.002〜0.006%N,0.0005〜0.004%O,余量为不可避免的杂质, 在距离表面层2〜20mm的层中平均直径为500μm以下的奥氏体晶粒; 在1000〜1180℃下加热板坯; 并轧制板坯。 版权所有(C)2009,JPO&INPIT
    • 4. 发明专利
    • Steel sheet superior in toughness, weldability and producibility, and manufacturing method therefor
    • 钢板厚度,焊接性和生产能力及其制造方法
    • JP2006193817A
    • 2006-07-27
    • JP2005009281
    • 2005-01-17
    • Nippon Steel Corp新日本製鐵株式会社
    • FURUYA HITOSHISAITO NAOKI
    • C22C38/00C21D8/02C22C38/28C22C38/54
    • PROBLEM TO BE SOLVED: To provide a steel sheet superior in toughness and weldability, and to provide a manufacturing method therefor. SOLUTION: The base metal of the steel sheet includes each predetermined amount of C, Si, Mn, P, S, Cr, Mo, Al, N and Ti, and further Nb, V, Cu, Ni, B, REM, Ca, Zr and Mg which are added as needed, so as to have X1 expressed by X1=Si/3+Mo+Cr/3-Mn/3 controlled to 0 or more and X2 expressed by X2=C+(Mn+Cu+Cr)/20+Si/30+Ni/60+Mo/15+V/10+5×B controlled to 0.24 or lower. The manufacturing method for the steel sheet mainly includes the steps of heating, rolling and air cooling the base metal. Thus manufactured steel sheet has a tensile strength of about 780 MPa at a comparatively high rolling temperature, and thereby acquires superior toughness, weldability and even producibility. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供韧性和焊接性优异的钢板,并提供其制造方法。 钢板的基体金属包括C,Si,Mn,P,S,Cr,Mo,Al,N和Ti中的每一个预定量,还有Nb,V,Cu,Ni,B,REM ,Ca,Zr和Mg,以使X1 = Si / 3 + Mo + Cr / 3-Mn / 3表示的X1为0以上,X2 = C +(Mn + Cu + Cr)/ 20 + Si / 30 + Ni / 60 + Mo / 15 + V / 10 + 5×B控制在0.24以下。 钢板的制造方法主要包括加热,轧制和空气冷却贱金属的步骤。 这样制造的钢板在较高的轧制温度下的拉伸强度为约780MPa,因此获得了优异的韧性,可焊性和均匀的生产率。 版权所有(C)2006,JPO&NCIPI
    • 7. 发明专利
    • Steel sheet superior in workability and producibility, and manufacturing method therefor
    • 钢铁生产能力和生产能力及其制造方法
    • JP2006193816A
    • 2006-07-27
    • JP2005009280
    • 2005-01-17
    • Nippon Steel Corp新日本製鐵株式会社
    • FURUYA HITOSHISAITO NAOKI
    • C22C38/00B21B1/26C21D8/02C22C38/34C22C38/54
    • PROBLEM TO BE SOLVED: To provide a steel sheet superior in workability and producibility, and to provide a manufacturing method therefor.
      SOLUTION: The base metal of the steel sheet includes each predetermined amount of C, Si, Mn, P, S, Cr, Mo, Nb, Al and N, and further Ti, V, Cu, Ni, B, REM, Ca, Zr and Mg which are added as needed, so as to have X1 expressed by X1=(Si/5+Mo+Cr/2)/(C+Mn/6) controlled to 0.5 or more and X2 expressed by X2=0.006t+0.8-Mn controlled to 0 or more. The manufacturing method for the steel sheet indispensably includes a water cooling step. Thus manufactured steel sheet has a region having a Vickers' hardness of 170 HV or lower so as to occupy 30% to 90% in a structure composing the steel, and a region having a Vickers' hardness of 350 HV or higher so as to occupy 10% to 70%; and thereby acquires superior workability.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供优异的加工性和可制造性的钢板,并提供其制造方法。 钢板的基体金属包括C,Si,Mn,P,S,Cr,Mo,Nb,Al和N各自的预定量,并且还包括Ti,V,Cu,Ni,B,REM ,Ca,Zr和Mg,以使X1 =(Si / 5 + Mo + Cr / 2)/(C + Mn / 6)表示的X1被控制为0.5以上,X2表示为X2 = 0.006t + 0.8-Mn控制在0以上。 钢板的制造方法不可缺少地包括水冷却步骤。 这样制造的钢板具有维氏硬度为170HV以下的区域,在构成钢的结构中占据30%〜90%,维氏硬度为350HV以上的区域占据 10%至70%; 从而获得优异的可加工性。 版权所有(C)2006,JPO&NCIPI
    • 8. 发明专利
    • Steel plate excellent in machinability, toughness and weldability, and method for production thereof
    • 机械性,韧性和焊接性优良的钢板及其生产方法
    • JP2005290554A
    • 2005-10-20
    • JP2005059314
    • 2005-03-03
    • Nippon Steel Corp新日本製鐵株式会社
    • FURUYA HITOSHISAITO NAOKI
    • C21D8/02C22C38/00C22C38/06C22C38/54
    • PROBLEM TO BE SOLVED: To provide a steel plate excellent in machinability, toughness and weldability, and to provide a method for production thereof. SOLUTION: The steel plate has a composite structure of a soft structure consisting essentially of ferrite and a hard structure consisting essentially of bainite and martensite, in which a ferrite proportion is ≥30% or the region where micro-Vickers hardness is ≤170 HV is ≥0.2, and further, the Vickers hardness of the steel is 165 to 300 HV. The steel plate is produced by a method comprising using a steel having the contents of C, Si, Mn, P, S, Al and N being limited to prescribed ranges and optionally further containing Mo, Cr, Nb, Ti, V, Cu, Ni, B, REM, Ca, Zr and Mg, and in which X1 expressed by X1=C+(Mn+Cu+Cr)/20+Si/30+Ni/60+Mo/15+V/10+5×B is ≤0.24, and X2 expressed by X2=(Si/5+Mo+Cr/2)/Mn is 0.15 to 10.0, and comprising strictly controlling the conditions in rolling, washing with water, and the like, and is excellent in machinability, toughness and weldability. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供可加工性,韧性和焊接性优异的钢板,并提供其制造方法。 钢板具有基本上由铁素体和主要由贝氏体和马氏体组成的硬质结构的软结构的复合结构,其中铁素体比例≥30%或微维氏硬度≤ 170 HV≥0.2,此外,钢的维氏硬度为165〜300HV。 该钢板是通过将含有C,Si,Mn,P,S,Al,N的含量限制在规定范围内的钢的方法制造的,任选地还含有Mo,Cr,Nb,Ti,V,Cu, Ni,B,REM,Ca,Zr和Mg,其中X1 = C +(Mn + Cu + Cr)/ 20 + Si / 30 + Ni / 60 + Mo / 15 + V / 10 + 5×B ≤0.24,X2 =(Si / 5 + Mo + Cr / 2)/ Mn表示的X2为0.15〜10.0,包括严格控制轧制条件,用水洗涤等,切削性优异 ,韧性和焊接性。 版权所有(C)2006,JPO&NCIPI
    • 10. 发明专利
    • Steel plate excellent in weldability and earthquake resistance, and its production method
    • 钢板优良的耐焊接性和抗电弧性能及其生产方法
    • JP2004162076A
    • 2004-06-10
    • JP2002322743
    • 2002-11-06
    • Nippon Steel Corp新日本製鐵株式会社
    • FURUYA HITOSHIKUMAGAI TATSUYAFUJIOKA MASAAKI
    • C21D8/02C22C38/00C22C38/14C22C38/58
    • PROBLEM TO BE SOLVED: To provide a method for producing a steel plate excellent in weldability and earthquake resistance. SOLUTION: The steel plate contains, in terms of mass%, 0.005-0.2% C, 0.0001-0.01% N, 0.001-0.1% Al, 0.01-1% Si, 0.1-2% Mn, 0.02% or lower P, 0.02% or lower S, at least one element selected from among 0.001-0.1% Ti, 0.001-0.2% V, and 0.001-0.1% Nb, and the balance being Fe and unavoidable impurities. In the steel plate, the density of number of particles of carbides, carbonitrides, and nitrides containing at least one element selected from among Ti, Ni and V and having an equivalent circle diameter of 50-10,000 nm is lower than 5.0×10 6 /mm 2 ; and a quotient obtained by dividing the density of number of particles by the total amount of added alloy elements contained by carbides, carbonitrides, and nitrides of Ti, Nb, and V, i.e., the objectives of calculating the density of number, is 5.0×10 7 /(mm 2 ×mass%). COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种焊接性和抗震性优异的钢板的制造方法。 钢板以质量%计含有0.005-0.2%C,0.0001-0.01%N,0.001-0.1%Al,0.01-1%Si,0.1-2%Mn,0.02%或更低 P,0.02%以下的S,选自0.001-0.1%Ti,0.001-0.2%V和0.001-0.1%Nb中的至少一种元素,余量为Fe和不可避免的杂质。 在钢板中,含有选自Ti,Ni和V中的至少一种元素的碳化物,碳氮化物和氮化物颗粒的数量密度低于5.0×10 6 /毫米 2 ; 将由Ti,Nb,V的碳化物,碳氮化物和氮化物所添加的合金元素的总量除以粒子数的密度,即计算密度的目的,得到的商为5.0× 10 7 /(毫米 2 ×质量%)。 版权所有(C)2004,JPO