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1. (WO2018180342) SHAFT MEMBER
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Pub. No.: WO/2018/180342 International Application No.: PCT/JP2018/009027
Publication Date: 04.10.2018 International Filing Date: 08.03.2018
IPC:
C22C 38/00 (2006.01) ,C22C 38/60 (2006.01) ,F16C 3/02 (2006.01) ,C21D 1/06 (2006.01) ,C21D 1/10 (2006.01) ,C21D 9/28 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
60
containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
3
Shafts; Axles; Cranks; Eccentrics
02
Shafts; Axles
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
1
General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering
06
Surface hardening
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
1
General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering
06
Surface hardening
09
by direct application of electrical or wave energy; by particle radiation
10
by electric induction
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
9
Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor
28
for plain shafts
Applicants:
愛知製鋼株式会社 AICHI STEEL CORPORATION [JP/JP]; 愛知県東海市荒尾町ワノ割1番地 1, Wano-wari, Arao-machi, Tokai-shi, Aichi 4768666, JP
Inventors:
宇佐美 健 USAMI Takeshi; JP
水野 浩行 MIZUNO Hiroyuki; JP
福田 康弘 FUKUDA Yasuhiro; JP
Agent:
特許業務法人あいち国際特許事務所 AICHI, TAKAHASHI, IWAKURA & ASSOCIATES; 愛知県名古屋市中村区名駅3丁目26番19号 名駅永田ビル Meieki Nagata Building, 26-19, Meieki 3-chome, Nakamura-ku, Nagoya-shi, Aichi 4500002, JP
Priority Data:
2017-06770830.03.2017JP
Title (EN) SHAFT MEMBER
(FR) ÉLÉMENT D'ARBRE
(JA) シャフト部材
Abstract:
(EN) A shaft member includes 0.20 – 0.45% C, 0.03 – 1.50% Si, 0.070% or less S, 0.50 – 2.00% Mn, 0.30 – 2.50% Cr, 0.010 – 0.100% Al, 0.0070 – 0.0200% N, 0 – 0.30% V, 0 – 0.50% Mo, with the remainder formed from Fe and unavoidable impurities, and satisfies formula 1: 19[C] + 2.3[Mn] + 1.4[Cr] + 13[Mo] + 25[V] > 11. The shaft member is provided with a first hardened layer for which the concentration of C is 0.50% or greater and the hardness is 700 HV or greater, a second hardened layer for which the hardness is 450 HV or greater, and an inner layer for which the hardness is 300 HV or greater. The thickness of the first hardened layer is 0.20 mm or greater, and the inside edge of the second hardened layer is positioned at a depth of 0.1 parts or greater of the diameter of the shaft member from the outermost surface. The shaft member can include more than 0% to 0.10% or less Ti and more than 0% to 0.0050% or less B as necessary, thereby improving fatigue strength.
(FR) La présente invention concerne un élément d'arbre qui comprend de 0,20 à 0,45 % de C, de 0,03 à 1,50 % de Si, de 0,070 % ou moins de S, de 0,50 à 2,00 % de Mn, de 0,30 à 2,50 % de Cr, de 0,010 à 0,100 % d'Al, de 0,0070 à 0,0200 % de N, de 0 à 0,30 % de V, de 0 à 0,50 % de Mo, le reste étant formé de Fe et d'impuretés inévitables et répond à la formule 1 : 19[C] + 2,3[Mn] + 1,4[Cr] + 13[Mo] + 25[V] > 11. L'élément d'arbre comporte une première couche durcie pour laquelle la concentration de C est supérieure ou égale à 0,50 % et la dureté est supérieure ou égale à 700 HV, une seconde couche durcie pour laquelle la dureté est supérieure ou égale à 450 HV et une couche interne pour laquelle la dureté est supérieure ou égale à 300 HV. L'épaisseur de la première couche durcie est supérieure ou égale à 0,20 mm et le bord intérieur de la seconde couche durcie est positionné à une profondeur supérieure ou égale à 0,1 partie du diamètre de l'élément d'arbre à partir de la surface la plus extérieure. L'élément d'arbre peut comprendre de plus de 0 % à moins de 0,10 % de Ti et de plus de 0 % à moins de 0,0050 % de B si nécessaire, ce qui permet d'améliorer la résistance à la fatigue.
(JA) C:0.20~0.45%、Si:0.03~1.50%、S:0.070%以下、Mn:0.50~2.00%、Cr:0.30~2.50%、Al:0.010~0.100%、N:0.0070~0.0200%、V:0~0.30%、Mo:0~0.50%を含有し、残部がFeおよび不可避不純物からなり、式1:19[C]+2.3[Mn]+1.4[Cr]+13[Mo]+25[V]>11を満足する。C濃度が0.50%以上であると共に硬さが700HV以上である第1硬化層と、硬さが450HV以上である第2硬化層と、硬さが300HV以上である内部層とを備える。第1硬化層の厚みは、0.20mm以上であり、第2硬化層の内側端は、最表面から上記シャフト部材の直径の0.1倍以上の深さ位置にある。必要に応じTi:0%超え0.10%以下、B:0%超え0.0050%以下を含有することにより疲労強度をさらに改善できる。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, 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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)