EA017741B1 - Steel for producing machine components formed from solid stock - Google Patents

Steel for producing machine components formed from solid stock Download PDF

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Publication number
EA017741B1
EA017741B1 EA201070313A EA201070313A EA017741B1 EA 017741 B1 EA017741 B1 EA 017741B1 EA 201070313 A EA201070313 A EA 201070313A EA 201070313 A EA201070313 A EA 201070313A EA 017741 B1 EA017741 B1 EA 017741B1
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Eurasian Patent Office
Prior art keywords
steel according
steel
controlled cooling
accelerated controlled
deformation
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EA201070313A
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Russian (ru)
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EA201070313A1 (en
Inventor
Роман Дидерихс
Аксель Штюбер
Роберт Ланге
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Георгсмариенхютте Гмбх
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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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • 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
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Forging (AREA)

Abstract

The invention relates to a steel and a processing method for producing machine components formed from solid stock, particularly for vehicle construction, having a primarily bainitic structure, characterized in that the chemical composition thereof has the following contents in weight percent: 0.10%≤C≤0.25%, 0.15%≤Si≤0.40%, 1.00%≤Mn≤1.50%, 1.00%≤Cr≤2.00%, 0.20%≤Ni≤0.40%, 0.05%≤Mo≤0.20%, 0.010%≤Nb≤0.040%, 0.05%≤V≤0.25%, 0.01%≤Al≤0.05%, 0.005%≤N≤0.025%, 0%≤B≤0.0050%, with the remainder being iron and the steel making-related accompanying elements and residual materials.

Description

Изобретение относится к стали и способу обработки для получения деталей машин путем объемной деформации, в частности для автомобилестроения, преимущественно со структурой бейнита.The invention relates to steel and a processing method for producing machine parts by volumetric deformation, in particular for the automotive industry, mainly with a bainite structure.

При этом согласно изобретению предусматривается, что в химический состав входят следующие компоненты, в мас.%:Moreover, according to the invention, it is provided that the following components are included in the chemical composition, in wt.%:

0,10<С<0,25;0.10 <C <0.25;

0,15<δί<0,40;0.15 <δί <0.40;

1,00<Мп<1,50;1.00 <Mn <1.50;

1,00<Сг<2,00;1.00 <Cr <2.00;

0,20<Νί<0,40;0.20 <Νί <0.40;

0,05<Мо<0,20;0.05 <Mo <0.20;

0.010· Мг 0.040;0.010 Mg 0.040;

0,05<У<0,25;0.05 <V <0.25;

0,01<А1<0,05;0.01 <A1 <0.05;

0,005<Ν<0,025;0.005 <Ν <0.025;

0<В<0,0050, причем остальное составляют железо и обусловленные плавкой сопутствующие элементы и остаточные материалы.0 <B <0.0050, with the remainder being iron and the associated melting elements and residual materials.

Особенно предпочтительный состав стали указан в п.2 формулы изобретения, причем он содержит, в мас.%:A particularly preferred steel composition is indicated in claim 2, and it contains, in wt.%:

0,10<С<0,20;0.10 <C <0.20;

0,20<δί<0,30;0.20 <δί <0.30;

1,00<Мп<1,50;1.00 <Mn <1.50;

1,50<Сг<2,00;1.50 <Cr <2.00;

0,20<Νί<0,40;0.20 <Νί <0.40;

0,05<Мо<0,20;0.05 <Mo <0.20;

0.020· Мг 0.040;0.020 Mg 0.040;

0,05<ν<0,20;0.05 <ν <0.20;

0,01<А1<0,05;0.01 <A1 <0.05;

0,005<Ν<0,025, причем остальное составляют железо и обусловленные плавкой сопутствующие элементы и остаточные материалы.0.005 <Ν <0.025, with the remainder being iron and the associated melting elements and residual materials.

Одним применением этой стали согласно изобретению является получение деталей машин, в частности для автомобилестроения, причем такие детали после ковки в штампе и ускоренного контролируемого охлаждения имеют преимущественно бейнитную структуру с выделениями специальных карбидов и/или нитридов.One application of this steel according to the invention is the production of machine parts, in particular for the automotive industry, and such parts after forging in a die and accelerated controlled cooling have a predominantly bainitic structure with precipitates of special carbides and / or nitrides.

Для полученных таким образом деталей согласно п.4 предусматривается, что предел текучести после ускоренного контролируемого охлаждения от деформационного нагрева составляет более 620 Н/мм2.For the parts thus obtained, according to claim 4, it is provided that the yield strength after accelerated controlled cooling from deformation heating is more than 620 N / mm 2 .

При этом предел прочности при растяжении согласно п.5 после ускоренного контролируемого охлаждения от деформационного нагрева должен составлять от 800 до 1100 Н/мм2.Moreover, the tensile strength according to claim 5 after accelerated controlled cooling from deformation heating should be from 800 to 1100 N / mm 2 .

Предпочтительно отношение предела текучести к пределу прочности после ускоренного контролируемого охлаждения от деформационного нагрева составляет более 70%.Preferably, the ratio of yield strength to tensile strength after accelerated controlled cooling from deformation heating is more than 70%.

Согласно п.7 предусматривается, что предельное удлинение после ускоренного контролируемого охлаждения от деформационного нагрева составляет более 10%.According to paragraph 7, it is provided that the ultimate elongation after accelerated controlled cooling from deformation heating is more than 10%.

Согласно п.8 предусмотрено, что относительное сужение при разрыве после ускоренного контролируемого охлаждения от деформационного нагрева составляет более 40%.According to paragraph 8, it is provided that the relative narrowing at break after accelerated controlled cooling from deformation heating is more than 40%.

Согласно п.9 работа на ударный изгиб с надрезом (надрез согласно ΌνΜ, комнатная температура) после ускоренного контролируемого охлаждения от деформационного нагрева составляет более 25 Дж.According to paragraph 9, the work on impact bending with a notch (notch according to ΌνΌ, room temperature) after accelerated controlled cooling from deformation heating is more than 25 J.

Согласно п.10 предлагается, что коэффициенты вязкости можно регулировать ступенчатым охлаждением, сначала с высокой скоростью охлаждения и стадией выдерживания в области бейнита или последующей обработкой старением.According to claim 10, it is proposed that the viscosity coefficients can be controlled by stepwise cooling, first with a high cooling rate and a holding step in the bainite region or subsequent aging treatment.

Деталь согласно п.11 должна быть пригодной для цементации с последующей закалкой и отпуском и для нитроцементации.The item according to claim 11 should be suitable for cementation with subsequent hardening and tempering and for nitrocarburizing.

Наконец, механические свойства как катанной заготовки для ковки, так и кованой детали можно устанавливать путем термообработки.Finally, the mechanical properties of both the rolled blank for forging and the forged part can be set by heat treatment.

Claims (13)

ФОРМУЛА ИЗОБРЕТЕНИЯCLAIM 1. Сталь для получения деталей машин с преимущественно бейнитной структурой путем объемной деформации, причем сталь характеризуется тем, что она имеет следующий химический состав, в мас.%:1. Steel for the production of machine parts with a predominantly bainitic structure by volume deformation, and the steel is characterized by the fact that it has the following chemical composition, in wt.%: 0,10<С<0,25;0.10 <C <0.25; 0,15<δί<0,40;0.15 <δί <0.40; 1,00<Мп<1,50;1.00 <Mn <1.50; 1,00<Сг<2,00;1.00 <Cr <2.00; 0,20<Νί<0,40;0.20 <Νί <0.40; 0,05<Мо<0,20;0.05 <Mo <0.20; 0,010<Ν6<0,040;0.010 <Ν6 <0.040; 0,05<У<0,25;0.05 <Y <0.25; 0,01<А1<0,05;0.01 <A1 <0.05; 0,005<Ν<0,025;0.005 <Ν <0.025; 0<В<0,0050, причем остальное составляют железо и обусловленные плавкой сопутствующие элементы и остаточные материалы.0 <B <0.0050, with the remainder being iron and fusible related elements and residual materials. 2. Сталь по п.1, отличающаяся тем, что предназначена для автомобилестроения и имеет следующий химический состав, в мас.%:2. The steel according to claim 1, characterized in that it is intended for the automotive industry and has the following chemical composition, in wt.%: 0,10<С<0,20;0.10 <C <0.20; 0,20<δί<0,30;0.20 <δί <0.30; 1,00<Мп<1,50;1.00 <Mn <1.50; 1,50<Сг<2,00;1.50 <Cr <2.00; 0,20<Νί<0,40;0.20 <Νί <0.40; 0,05<Мо<0,20;0.05 <Mo <0.20; 0,020<Ν6<0,040;0.020 <Ν6 <0.040; 0,05<ν<0,20;0.05 <ν <0.20; 0,01<А1<0,05;0.01 <A1 <0.05; 0,005<Ν<0,025, причем остальное составляют железо и обусловленные плавкой сопутствующие элементы и остаточные материалы.0.005 <Ν <0.025, with the remainder being iron and fusible associated elements and residual materials. 3. Сталь по п.1, отличающаяся тем, что имеет предел текучести после ускоренного контролируемого охлаждения от деформационного нагрева более 620 Н/мм2.3. Steel according to claim 1, characterized in that it has a yield strength after accelerated controlled cooling from deformation heating to more than 620 N / mm 2 . 4. Сталь по п.1, отличающаяся тем, что имеет предел прочности при растяжении после ускоренного контролируемого охлаждения от деформационного нагрева от 800 до 1100 Н/мм2.4. The steel according to claim 1, characterized in that it has a tensile strength after accelerated controlled cooling from strain heating from 800 to 1100 N / mm 2 . 5. Сталь по п.1, отличающаяся тем, что имеет отношение предела текучести к пределу прочности после ускоренного контролируемого охлаждения от деформационного нагрева более 70%.5. Steel according to claim 1, characterized in that it has a ratio of yield strength to tensile strength after accelerated controlled cooling from deformation heating of more than 70%. 6. Сталь по п.1, отличающаяся тем, что имеет предельное удлинение после ускоренного контролируемого охлаждения от деформационного нагрева более 10%.6. The steel according to claim 1, characterized in that it has the ultimate elongation after accelerated controlled cooling from deformation heating more than 10%. 7. Сталь по п.1, отличающаяся тем, что имеет относительное сужение при разрыве после ускоренного контролируемого охлаждения от деформационного нагрева более 40%.7. Steel according to claim 1, characterized in that it has a relative narrowing at break after accelerated controlled cooling from deformation heating of more than 40%. 8. Сталь по п.1, отличающаяся тем, что имеет величину работы на ударный изгиб образца с надрезом (согласно ΌνΜ, при комнатной температуре) после ускоренного контролируемого охлаждения от деформационного нагрева более 25 Дж.8. Steel according to claim 1, characterized in that it has a magnitude of work on impact bending of a specimen with a notch (according to ΌνΜ, at room temperature) after accelerated controlled cooling from deformation heating more than 25 J. 9. Сталь по п.1, отличающаяся тем, что значение коэффициента вязкости установлено путем ступенчатого охлаждения, сначала с высокой скоростью охлаждения и стадией выдерживания в области бейнита или последующей обработкой старением.9. Steel according to claim 1, characterized in that the value of the viscosity coefficient is established by step cooling, first with a high cooling rate and a aging stage in the bainite region or a subsequent aging treatment. 10. Сталь по п.1, отличающаяся тем, что она подходит для цементации с последующей закалкой и отпуском или для нитроцементации.10. Steel according to claim 1, characterized in that it is suitable for carburization followed by quenching and tempering or for carbonitriding. 11. Сталь по п.1, отличающаяся тем, что ее механические свойства как в прокатанной заготовке для ковки, так и в кованой детали установлены термообработкой.11. Steel according to claim 1, characterized in that its mechanical properties, both in the rolled billet forging, and in the forged part, are heat-treated. 12. Деталь машины, полученная из стали по любому из пп.1-11, которая после ковки в штампе и ускоренного контролируемого охлаждения имеет преимущественно бейнитную структуру с выделениями специальных карбидов и/или нитридов.12. Detail of the machine, obtained from steel according to any one of claims 1 to 11, which, after forging in the stamp and accelerated controlled cooling, has a predominantly bainite structure with secretions of special carbides and / or nitrides. 13. Деталь машины по п.12, отличающаяся тем, что она предназначена для автомобилестроения.13. Detail of the machine according to claim 12, characterized in that it is intended for the automotive industry.
EA201070313A 2007-08-27 2008-08-12 Steel for producing machine components formed from solid stock EA017741B1 (en)

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DE102007040616 2007-08-27
PCT/DE2008/001319 WO2009026881A1 (en) 2007-08-27 2008-08-12 Steel for producing machine components formed from solid stock

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JP (1) JP2010537054A (en)
KR (1) KR20100057823A (en)
CN (1) CN101821413A (en)
AR (1) AR067684A1 (en)
AT (1) ATE537274T1 (en)
AU (1) AU2008291431A1 (en)
CA (1) CA2697794A1 (en)
DE (1) DE102007057421A1 (en)
EA (1) EA017741B1 (en)
ES (1) ES2378353T3 (en)
MX (1) MX2010002282A (en)
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KR20190028568A (en) * 2014-07-29 2019-03-18 신닛테츠스미킨 카부시키카이샤 Carbonitrided bearing member
JP2016145380A (en) * 2015-02-06 2016-08-12 株式会社神戸製鋼所 Steel for large sized forging and large sized forging component
CN113025777A (en) * 2021-03-02 2021-06-25 攀钢集团江油长城特殊钢有限公司 30CrNi2MoVA large-size forged material and preparation method thereof

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EP2183396A1 (en) 2010-05-12
WO2009026881A1 (en) 2009-03-05
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