JP2008063656A - 疲労特性に優れた自動車足回り部品用鋼材及びこれを用いた自動車足回り部品の製造方法 - Google Patents
疲労特性に優れた自動車足回り部品用鋼材及びこれを用いた自動車足回り部品の製造方法 Download PDFInfo
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- 239000010959 steel Substances 0.000 title claims abstract description 79
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- 238000000034 method Methods 0.000 title abstract description 13
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- 239000000463 material Substances 0.000 claims description 45
- 238000005452 bending Methods 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 13
- 229910052758 niobium Inorganic materials 0.000 claims description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims description 11
- 238000005496 tempering Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 description 12
- 238000005482 strain hardening Methods 0.000 description 8
- 238000009661 fatigue test Methods 0.000 description 7
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- 238000004881 precipitation hardening Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910020012 Nb—Ti Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 238000002844 melting Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G9/00—Resilient suspensions of a rigid axle or axle housing for two or more wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/051—Trailing arm twist beam axles
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/20—Semi-rigid axle suspensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
- B60G2206/202—Constructional features of semi-rigid axles, e.g. twist beam type axles with a radially deformed tube as a cross member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/70—Materials used in suspensions
- B60G2206/72—Steel
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Abstract
【解決手段】本発明の自動車足回り部品用鋼材は、Nb、Moが複合添加された鋼材であり、板外面の曲げRが板厚の2〜5倍となる曲げ成形を行った後の板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差が、50〜150ポイントである。表面硬度が高く中心部は硬度が低いので、疲労特性と成形加工性に優れる。なお、λ=T(20+log(t))で定義される焼き戻しパラメータλが14000〜19000となる条件(Tは絶対温度、tは時間(h)、温度上限は660℃)で焼鈍すれば、内部応力を緩和して疲労特性を更に向上させることができる。
【選択図】図3
Description
Claims (8)
- Nb、Moが複合添加された鋼材であり、板外面の曲げRが板厚の2〜5倍となる曲げ成形後の板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差が、50〜150ポイントであることを特徴とする疲労特性に優れた自動車足回り部品用鋼材。
- Nb、Moが複合添加された鋼材であり、板外面の曲げRが板厚の2〜5倍となる曲げ成形後、λ=T(20+log(t))で定義される焼き戻しパラメータλが14000〜19000となる条件(Tは絶対温度、tは時間(h)、温度上限は660℃)で焼鈍した後の板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差が、50〜150ポイントであることを特徴とする疲労特性に優れた自動車足回り部品用鋼材。
- 質量%で、C:0.05〜0.23、Si:0.05〜1.0、Mn:0.3〜2.0、P:0.03以下、S:0.01以下、Nb:0.01〜0.1、Mo:0.1〜0.5、Sol.Al:0.01〜0.05、N:0.006以下、残部Feの組成を有することを特徴とする請求項1または2に記載の疲労特性に優れた自動車足回り部品用鋼材。
- 質量%で、Ti:0.005〜0.03、V:0.005〜0.1、Cr:0.1〜0.5、Cu:0.001〜0.5、Ni:0.001〜0.5、B:0.0001〜0.003、Ca:0.0001〜0.003、Mg:0.0001〜0.004の何れか1種または2種以上を更に含有することを特徴とする請求項3に記載の疲労特性に優れた自動車足回り部品用鋼材。
- 質量%で、C:0.05〜0.23、Si:0.05〜1.0、Mn:0.3〜2.0、P:0.03以下、S:0.01以下、Nb:0.01〜0.1、Mo:0.1〜0.5、Sol.Al:0.01〜0.05、N:0.006以下、残部Feの組成を有する鋼材を、板外面の曲げRが板厚の2〜5倍となるように曲げ成形し、板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差を50〜150ポイントとすることを特徴とする疲労特性に優れた自動車足回り部品の製造方法。
- 質量%で、C:0.05〜0.23、Si:0.05〜1.0、Mn:0.3〜2.0、P:0.03以下、S:0.01以下、Nb:0. 01〜0.1、Mo:0.1〜0.5、Sol.Al:0.01〜0.05、N:0.006以下、残部Feの組成を有する鋼材を、板外面の曲げRが板厚の2〜5倍となる曲げ成形後、λ=T(20+log(t))で定義される焼き戻しパラメータλが14000〜19000となる条件(Tは絶対温度、tは時間(h)、温度上限は660℃)で焼鈍し、板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差を50〜150ポイントとすることを特徴とする疲労特性に優れた自動車足回り部品の製造方法。
- 質量%で、C:0.05〜0.23、Si:0.05〜1.0、Mn:0.3〜2.0、P:0.03以下、S:0.01以下、Nb:0.01〜0.1、Mo:0.1〜0.5、Sol.Al:0.01〜0.05、N:0.006以下を含有し、更にTi:0.005〜0.03、V:0.005〜0.1、Cr:0.1〜0.5、Cu:0.001〜0.5、Ni:0.001〜0.5、B:0.0001〜0.003、Ca:0.0001〜0.003、Mg:0.0001〜0.004の何れか1種または2種以上を含有し、残部Feの組成を有する鋼材を、板外面の曲げRが板厚の2〜5倍となるように曲げ成形し、板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差を50〜150ポイントとすることを特徴とする疲労特性に優れた自動車足回り部品の製造方法。
- 質量%で、C:0.05〜0.23、Si:0.05〜1.0、Mn:0.3〜2.0、P:0.03以下、S:0.01以下、Nb:0.01〜0.1、Mo:0.1〜0.5、Sol.Al:0.01〜0.05、N:0.006以下を含有し、更にTi:0.005〜0.03、V:0.005〜0 .1、Cr:0.1〜0.5、Cu:0.001〜0.5、Ni:0.001〜0.5、B:0.0001〜0.003、Ca:0.0001〜0.003、Mg:0.0001〜0.004の何れか1種または2種以上を含有し、残部Feの組成を有する鋼材を、板外面の曲げRが板厚の2〜5倍となる曲げ成形後、λ=T(20+log(t))で定義される焼き戻しパラメータλが14000〜19000となる条件(Tは絶対温度、tは時間(h)、温度上限は660℃)で焼鈍し、板厚中心のビッカース硬さと、表面から0.5mm以内のビッカース硬さの最高値との差を50〜150ポイントとすることを特徴とする疲労特性に優れた自動車足回り部品の製造方法。
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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JP2007197348A JP4282731B2 (ja) | 2006-08-11 | 2007-07-30 | 疲労特性に優れた自動車足回り部品の製造方法 |
EP07792533.7A EP2050835B1 (en) | 2006-08-11 | 2007-08-08 | Steel for automobile undercarriage component excelling in fatigue performance and process for manufacturing automobile undercarriage component using the steel |
KR1020127002108A KR101253327B1 (ko) | 2006-08-11 | 2007-08-08 | 피로 특성이 우수한 자동차 차대 부품용 강재 |
PCT/JP2007/065893 WO2008018624A1 (fr) | 2006-08-11 | 2007-08-08 | Acier pour composant de train roulant d'automobile présentant d'excellentes performances en fatigue et procédé de fabrication d'un composant de train roulant d'automobile utilisant cet acier |
US12/310,033 US8828159B2 (en) | 2006-08-11 | 2007-08-08 | Steel material for automobile chassis parts superior in fatigue characteristics and method of production of automobile chassis parts using the same |
CN201110048056.0A CN102174684B (zh) | 2006-08-11 | 2007-08-08 | 疲劳特性优异的异型截面形状的汽车行走部件 |
CN2007800297995A CN101501233B (zh) | 2006-08-11 | 2007-08-08 | 疲劳特性优异的汽车行走部件用钢材以及使用该钢材的汽车行走部件的制造方法 |
KR1020097002638A KR101141764B1 (ko) | 2006-08-11 | 2007-08-08 | 피로 특성이 우수한 자동차 차대 부품용 열간 압연 강재의 제조 방법 |
US13/300,970 US8778261B2 (en) | 2006-08-11 | 2011-11-21 | Steel material for automobile chassis parts superior in fatigue characteristics and method of production of automobile chassis parts using the same |
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JP2006219737 | 2006-08-11 | ||
JP2007197348A JP4282731B2 (ja) | 2006-08-11 | 2007-07-30 | 疲労特性に優れた自動車足回り部品の製造方法 |
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JP2009063887A Division JP5258642B2 (ja) | 2006-08-11 | 2009-03-17 | 疲労特性に優れた異形断面形状の自動車足回り部品 |
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JP4282731B2 JP4282731B2 (ja) | 2009-06-24 |
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US (2) | US8828159B2 (ja) |
EP (1) | EP2050835B1 (ja) |
JP (1) | JP4282731B2 (ja) |
KR (2) | KR101141764B1 (ja) |
CN (1) | CN102174684B (ja) |
WO (1) | WO2008018624A1 (ja) |
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US11498107B2 (en) | 2017-10-04 | 2022-11-15 | Nippon Steel Corporation | Torsion beam manufacturing method and torsion beam manufacturing apparatus |
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KR20120025620A (ko) | 2012-03-15 |
EP2050835A1 (en) | 2009-04-22 |
WO2008018624A1 (fr) | 2008-02-14 |
EP2050835A4 (en) | 2011-10-12 |
KR101253327B1 (ko) | 2013-04-11 |
US20090277542A1 (en) | 2009-11-12 |
KR101141764B1 (ko) | 2012-07-12 |
KR20090035700A (ko) | 2009-04-10 |
CN102174684A (zh) | 2011-09-07 |
EP2050835B1 (en) | 2018-10-03 |
US8778261B2 (en) | 2014-07-15 |
US8828159B2 (en) | 2014-09-09 |
US20120093678A1 (en) | 2012-04-19 |
CN102174684B (zh) | 2016-08-24 |
JP4282731B2 (ja) | 2009-06-24 |
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