公开(公告)号：EP3045556A4

公开(公告)日：2016-12-28

申请号：EP14844852

申请日：2014-09-11

申请人： JFE STEEL CORP ,  SUMIHATSU CO LTD ,  NHK SPRING CO LTD

发明人： HONJO MINORU ,  UWAI KIYOSHI ,  ENDO SHIGERU ,  YAMASHITA KATSUTOSHI ,  TSURU KOEI ,  FUJIE KEIICHI ,  TANGE AKIRA

IPC分类号： C22C38/00 ,  C21D1/18 ,  C21D1/25 ,  C21D6/00 ,  C21D8/06 ,  C21D9/02 ,  C21D9/52 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/60 ,  F16F1/02

CPC分类号： C22C38/60 ,  C21D1/18 ,  C21D1/25 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/06 ,  C21D8/065 ,  C21D9/02 ,  C21D9/525 ,  C22C38/00 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  F16F1/02

摘要： Provided is high strength steel for springs that, compared to conventional high strength steel for springs, has excellent decarburization resistance and scale exfoliation property, by optimization of the added amounts of C, Si, Mn, and Cr as well as of Sb and Sn. The steel for springs contains C: more than 0.45 mass% and less than 0.65 mass%, Si: 0.15 mass% or more and 0.70 mass% or less, Mn: 0.10 mass% or more and 1.00 mass% or less, Cr: 0.20 mass% or more and 1.50 mass% or less, P: 0.025 mass% or less, S: 0.025 mass% or less, O: 0.0015 mass% or less, Sb: 0.010 mass% or more and less than 0.030 mass%, and Sn: 0.010 mass% or more and 0.030 mass% or less, under predetermined conditions.

摘要翻译： 本发明提供了与传统的弹簧用高强度钢相比，通过优化C，Si，Mn，Cr以及Sb和Sn的添加量，具有优异的耐脱碳性和抗剥离性。 弹簧钢含有C：0.45质量％以上且0.65质量％以下，Si：0.15质量％以上且0.70质量％以下，Mn：0.10质量％以上且1.00质量％以下，Cr：0.20 质量％以上且1.50质量％以下，P：0.025质量％以下，S：0.025质量％以下，O：0.0015质量％以下，Sb：0.010质量％以上且小于0.030质量％，以及 Sn：0.010质量％以上且0.030质量％以下。

公开(公告)号：EP2816130A4

公开(公告)日：2015-08-19

申请号：EP13749053

申请日：2013-02-14

申请人： JFE STEEL CORP

发明人： HONJO MINORU ,  UWAI KIYOSHI ,  MITAO SHINJI

IPC分类号： C22C38/00 ,  C21D8/06 ,  C21D9/02 ,  C22C38/60

CPC分类号： C22C38/60 ,  C21D6/008 ,  C21D8/06 ,  C21D9/02 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

公开(公告)号：EP2980231A4

公开(公告)日：2016-12-21

申请号：EP14774063

申请日：2014-03-25

申请人： JFE STEEL CORP

发明人： KIMURA TATSUMI ,  UWAI KIYOSHI ,  ENDO SHIGERU ,  YAMAGUCHI MORIYASU

IPC分类号： C21D9/04 ,  C21D8/00 ,  C22C38/00 ,  C22C38/18 ,  C22C38/50

CPC分类号： C22C38/28 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/00 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50

摘要： A method of manufacturing a pearlitic rail according to the present invention includes: hot rolling a billet including in % by mass: 0.70% to 0.90% of C; 0.1% to 1.5% of Si; 0.01% to 1.5% of Mn; 0.001% to 0.035% of P; 0.005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities, so as to achieve a finishing rolling temperature of not lower than 900°C to form a rail material; and cooling the rail material in an accelerated manner at a cooling rate of 2°C /s to 30°C /s from a temperature of 770°C to 500°C, reheating the resultant or subjecting the resultant to secondary heating to a temperature within the range of 530°C to 580°C, holding the resultant at the temperature range for 20 s to 100 s, and cooling the resultant in an accelerated manner at a cooling rate of 2°C /s to 10°C /s to a temperature within the range of not higher than 450°C.

公开(公告)号：EP2762587A4

公开(公告)日：2015-04-08

申请号：EP12835952

申请日：2012-09-27

申请人： JFE STEEL CORP ,  NTN TOYO BEARING CO LTD

发明人： HONJO MINORU ,  UWAI KIYOSHI ,  MITAO SHINJI

IPC分类号： C22C38/00 ,  C21D8/06 ,  C22C38/22 ,  C22C38/54

CPC分类号： C21D8/005 ,  B22D7/00 ,  C21D1/26 ,  C21D7/13 ,  C21D9/0081 ,  C21D9/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  F16C33/121

摘要： A method is provided with which a bearing steel, even when obtained from an ingot, is made to have a segregation part reduced in the degree of segregation and maximum inclusion diameter. The ingot contains 0.56-0.70 mass% C, 0.15-0.50 mass%, excluding 0.50 mass%, Si, 0.60-1.50 mass% Mn, 0.50-1.10 mass% Cr, 0.05-0.5 mass% Mo, up to 0.025 mass% P, up to 0.025 mass% S, 0.005-0.500 mass% Al, up to 0.0015 mass% O, and 0.0030-0.015 mass% N, with the remainder comprising Fe and incidental impurities. The ingot has a degree of segregation of 2.8 or less and a predicted value of the maximum diameter of inclusions present in 30,000 mm 2 of the ingot, as calculated by extreme value statistics, of 60 µm or less.

摘要翻译： 提供了一种方法，其中轴承钢甚至当由锭获得时被制成具有偏析程度和最大夹杂物直径减小的偏析部分。 该锭含有0.56-0.70质量％C，0.15-0.50质量％，不包括0.50质量％，Si，0.60-1.50质量％Mn，0.50-1.10质量％Cr，0.05-0.5质量％Mo，至0.025质量％P ，高达0.025质量％的S，0.005-0.500质量％的Al，至多0.0015质量％的O和0.0030-0.015质量％的N，其余的包括Fe和附带的杂质。 该锭的偏析度为2.8以下，通过极值统计计算出的铸锭的30,000mm 2的夹杂物的最大直径的预测值为60μm以下。

公开(公告)号：EP2647734A4

公开(公告)日：2014-04-30

申请号：EP11845154

申请日：2011-11-24

申请人： JFE STEEL CORP

发明人： HIRAI YASUMASA ,  UWAI KIYOSHI

IPC分类号： C22C38/00 ,  C21D1/18 ,  C21D1/32 ,  C21D8/00 ,  C21D9/18 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  F16C33/30 ,  F16C33/62

CPC分类号： C22C38/44 ,  C21D1/18 ,  C21D1/32 ,  C21D8/005 ,  C21D9/40 ,  C22C1/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  F16C33/30 ,  F16C33/62 ,  F16C2204/66 ,  F16C2204/70

公开(公告)号：EP2647733A4

公开(公告)日：2014-01-15

申请号：EP11844108

申请日：2011-11-29

申请人： JFE STEEL CORP

发明人： HIRAI YASUMASA ,  UWAI KIYOSHI

IPC分类号： C22C38/00 ,  C21D1/32 ,  C21D6/00 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/60 ,  F16C33/62

CPC分类号： C22C38/60 ,  C21D1/32 ,  C21D6/002 ,  C21D9/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/44 ,  C22C38/58 ,  F16C33/62

公开(公告)号：EP3040437A4

公开(公告)日：2016-12-21

申请号：EP14840690

申请日：2014-07-10

申请人： JFE STEEL CORP

发明人： IMANAMI YUTA ,  IWAMOTO TAKASHI ,  UWAI KIYOSHI

IPC分类号： C23C8/02 ,  C21D1/06 ,  C21D9/32 ,  C22C38/00 ,  C22C38/32 ,  C22C38/60 ,  C23C8/22

CPC分类号： B21K1/30 ,  C21D1/06 ,  C21D1/26 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D9/32 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C23C8/02 ,  C23C8/22 ,  F16H55/06 ,  F16H55/17

摘要： A mechanical structural component is a toothed component obtained by performing cold forging and carburizing treatment on a steel having a chemical composition that includes, in % by mass: 0.10% to 0.35% C; 0.01% to 0.13% Si; 0.30% to 0.80% Mn; 0.03% or less P; 0.03% or less S; 0.01% to 0.045% Al; 0.5% to 3.0% Cr; 0.0005% to 0.0040% B; 0.003% to 0.080% Nb; and 0.0080% or less N, wherein Ti mixed in the chemical composition as an impurity is limited to 0.005% or less, and the chemical composition has a balance including Fe and incidental impurities, in prior austenite grains after the carburizing treatment, an area ratio of crystal grains of 50 µm or less is 80% or more, and an area ratio of crystal grains exceeding 300 µm is 10% or less, and a total helix deviation of teeth after the carburizing treatment satisfies Formula (1) B max / L × 10 3 ‰¤ 5 where B max is a maximum total helix deviation in all teeth in mm, and L is a face width in mm. Such a toothed mechanical structural component has excellent dimensional accuracy.

公开(公告)号：EP2878695A4

公开(公告)日：2015-12-30

申请号：EP13823507

申请日：2013-07-22

申请人： JFE STEEL CORP ,  JFE BARS & SHAPES CORP

发明人： OMORI YASUHIRO ,  UWAI KIYOSHI ,  MITAO SHINJI ,  IWAMOTO TAKASHI ,  ANDO KEISUKE ,  TOMITA KUNIKAZU

IPC分类号： C22C38/22 ,  C21D1/06 ,  C21D6/00 ,  C21D8/06 ,  C21D9/32 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60 ,  C23C8/04 ,  C23C8/32

CPC分类号： C23C8/32 ,  C21D1/06 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/06 ,  C21D8/065 ,  C21D9/32 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60 ,  C23C8/04

摘要： The present invention provides a steel for nitrocarburizing having excellent mechanical workability before nitrocarburizing, and showing excellent fatigue properties after nitrocarburizing, which is suitable for applying in mechanical structural components for automobiles etc. prepared by adjusting the composition so that it contains in mass%, C: 0.01 % or more and less than 0.10 %, Si: 1.0 % or less, Mn: 0.5 % to 3.0 %, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.3 % to 3.0 %, Mo: 0.005 % to 0.4 %, V: 0.02 % to 0.5 %, Nb: 0.003 % to 0.15 %, Al: 0.005 % to 0.2 %, and Sb: 0.0005 % to 0.02 %, and the balance including Fe and incidental impurities, and setting the area ratio of bainite phase to the whole microstructure to more than 50 %.

公开(公告)号：EP2816128A4

公开(公告)日：2015-05-20

申请号：EP13748467

申请日：2013-02-15

申请人： JFE BARS & SHAPES CORP ,  JFE STEEL CORP

发明人： IWAMOTO TAKASHI ,  ANDO KEISUKE ,  TOMITA KUNIKAZU ,  OMORI YASUHIRO ,  UWAI KIYOSHI ,  MITAO SHINJI

IPC分类号： C22C38/00 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60 ,  C23C8/32

CPC分类号： C23C8/32 ,  C21D6/002 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60

摘要： According to the present invention, it is possible to obtain steel for nitrocarburizing having a predetermined chemical composition, a bainite area ratio exceeding 50 % and excellent machinability by cutting before nitrocarburizing, and having strength and toughness equivalent to conventional steel, such as SCr420 carburized steel material, and excellent fatigue properties after nitrocarburizing.

公开(公告)号：EP1905849A4

公开(公告)日：2011-01-05

申请号：EP06768024

申请日：2006-07-10

申请人： NTN TOYO BEARING CO LTD ,  JFE STEEL CORP

发明人： HIRAI ISAO ,  YOSHINO KOHEI ,  TAKUBO TAKAYASU ,  YOSHIDA KAZUHIKO ,  HASE KAZUKUNI ,  KIMURA HIDETO ,  UWAI KIYOSHI ,  TOYOOKA TAKAAKI

IPC分类号： C21D9/40 ,  B21J1/06 ,  B21K1/05 ,  B60B27/00 ,  B60B35/02 ,  C21D1/02 ,  C21D1/19 ,  F16C19/18 ,  F16C33/62 ,  F16C33/64

CPC分类号： F16C33/62 ,  B21K1/40 ,  B60B27/00 ,  C21D1/02 ,  C21D1/19 ,  C21D9/40 ,  C21D2221/00 ,  F16C33/64 ,  F16C2326/02 ,  Y10T29/49492 ,  Y10T29/49496 ,  Y10T29/49497 ,  Y10T29/49643 ,  Y10T29/49657 ,  Y10T29/497

摘要： A method is directed to a production of a bearing device for a wheel including an inner member (1) and an outer member (2) rotatable relative to each other through a plurality of rolling elements (3), in which a component part forming one of the inner member (1) and the outer member (2) is a hot forged product. In the practice of this method, during or at the end of a hot forging step for hot forging the component part, a portion of the component part is cooled by spraying a coolant or by controlling an atmospheric temperature, to thereby render a matrix of the component part to represent a standard structure and render a surface portion of the component part to represent a non-standard structure (30).