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1. WO2016186033 - SPRING STEEL

Publication Number WO/2016/186033
Publication Date 24.11.2016
International Application No. PCT/JP2016/064319
International Filing Date 13.05.2016
IPC
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/54 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
54with boron
C21D 8/06 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
06during manufacturing of rods or wires
CPC
C21D 1/18
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening
C21D 8/06
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
06during manufacturing of rods or wires
C21D 8/065
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
06during manufacturing of rods or wires
065of ferrous alloys
C21D 9/02
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
02for springs
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
Applicants
  • 新日鐵住金株式会社 NIPPON STEEL & SUMITOMO METAL CORPORATION [JP]/[JP]
Inventors
  • 鈴木 崇久 SUZUKI Takahisa
  • 久保田 学 KUBOTA Manabu
  • 小澤 修司 KOZAWA Shuji
  • 宮本 裕嗣 MIYAMOTO Hirotsugu
Agents
  • 志賀 正武 SHIGA Masatake
Priority Data
2015-10000815.05.2015JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) SPRING STEEL
(FR) ACIER À RESSORT
(JA) ばね鋼
Abstract
(EN) This spring steel has a chemical composition of, in unit mass%, C: 0.40-0.60%, Si: 0.90-2.50%, Mn: 0.20-1.20%, Cr: 0.15-2.00%, Ni: 0.10-1.00%, Ti: 0.030-0.100%, B: 0.0010-0.0060%, N: 0.0010-0.0070%, Cu: 0-0.50%, Mo: 0-1.00%, V: 0-0.50%, and Nb: 0-0.10%, wherein P, S, and Al are limited to less than 0.020%, less than 0.020%, and less than 0.050%, respectively, the remaining portion comprises Fe and impurities, the chemical composition satisfies ([Ti] - 3.43 × [N]) > 0.03 when [Ti] and [N] represent Ti content and N content in unit mass%, respectively, and the density of the total number of Ti carbide and Ti carbonitride having a diameter of 5-100 nm is higher than 50/µm3.
(FR) L'invention concerne un acier à ressort qui présente la composition chimique suivante, en % de masse unitaire : 0,40-0,60 % de C, 0,90-2,50 % de Si, 0,20-1,20 % de Mn, 0,15-2,00 % de Cr, 0,10-1,00 % de Ni, 0,030-0,100 % de Ti, 0,0010-0,0060 % de B, 0,0010-0,0070 % de N, 0-0,50 % de Cu, 0-1,00 % de Mo, 0-0,50 % de V et 0-0,10 % de Nb. Les proportions de P, S et Al sont limitées à moins de 0,020 %, moins de 0,020 % et moins de 0,050 %, respectivement, la partie restante comprenant du Fe et des impuretés. La composition chimique satisfait la relation ([Ti] - 3,43 × [N]) > 0,03 lorsque [Ti] et [N] représentent la teneur en Ti et la teneur en N en % de masse unitaire, respectivement, et la densité de la quantité totale de carbure de Ti et de carbonitrure de Ti présentant un diamètre de 5-100 nm est supérieure à 50/µm3.
(JA)  このばね鋼は、化学成分が、単位質量%で、C:0.40~0.60%、Si:0.90~2.50%、Mn:0.20~1.20%、Cr:0.15~2.00%、Ni:0.10~1.00%、Ti:0.030~0.100%、B:0.0010~0.0060%、N:0.0010~0.0070%、Cu:0~0.50%、Mo:0~1.00%、V:0~0.50%、Nb:0~0.10%、を含み、P:0.020%未満、S:0.020%未満、およびAl:0.050%未満に制限し、残部がFeおよび不純物からなり、[Ti]および[N]それぞれがTi含有量およびN含有量を単位質量%で表す場合、前記化学成分が([Ti]-3.43×[N])>0.03を満たし、直径が5nm以上100nm以下のTi炭化物及びTi炭窒化物の合計個数密度が50個/μm超である。
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