KR970043224A - High strength hot forging steel with improved machinability - Google Patents

High strength hot forging steel with improved machinability Download PDF

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Publication number
KR970043224A
KR970043224A KR1019950053479A KR19950053479A KR970043224A KR 970043224 A KR970043224 A KR 970043224A KR 1019950053479 A KR1019950053479 A KR 1019950053479A KR 19950053479 A KR19950053479 A KR 19950053479A KR 970043224 A KR970043224 A KR 970043224A
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KR
South Korea
Prior art keywords
high strength
hot forging
strength hot
improved machinability
less
Prior art date
Application number
KR1019950053479A
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Korean (ko)
Inventor
오승택
Original Assignee
한승준
기아자동차주식회사
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Application filed by 한승준, 기아자동차주식회사 filed Critical 한승준
Priority to KR1019950053479A priority Critical patent/KR970043224A/en
Publication of KR970043224A publication Critical patent/KR970043224A/en

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Abstract

본 발명은 900MPa 이상의 강도를 확보함과 동시에 우수한 절삭 특성을 유지하면서, 인성을 확보할 수 있는 강재를 제공하는 것을 목정으로 한다. 강재는 중량%로 C : 0.24~0.50%, Si : 0.15~0.80%, Mn: 0.70~2.00%, S: 0.01~0.07%, Cr: 0.05~0.40%, V: 0.04~.25, N: 0.0050~0.020%, O: 0.0010~0.015%, Ti 또는 A1→Ti: 0.0020~0.040%, A1: 0.0040~0.05%의 단독 또는 복합첨가, 나머지가 Fe 및 불가피하게 포함되는 불순물로 이루어지는 것을 특징으로 한다. 또한, 강재는 중량%로 C : 0.24~0.50%, Si : 0.15~0.80%, Mn: 0.70~2.00%, S: 0.01~0.07%, Cr: 0.05~0.40%, V: 0.04~0.25, N: 0.0050~0.020%, O: 0.0010~0.015%, Ti 또는 A1→Ti: 0.0020~0.040%, A1: 0.0040~0.02% 단독 또는 복합첨가, 이외에 Ca: 0.0002~0.010%, Te: 0.10%이하, Se: 0.10%이하, Pb: 0.30% 이하, Bi: 0.30% 이하의 1종 이상을 첨가하여 개재물의 형상이 제어되는 것을 특징으로 한다.It is an object of the present invention to provide a steel material capable of securing toughness while maintaining strength of 900 MPa or more and maintaining excellent cutting characteristics. Steels in weight% C: 0.24 ~ 0.50%, Si: 0.15 ~ 0.80%, Mn: 0.70 ~ 2.00%, S: 0.01 ~ 0.07%, Cr: 0.05 ~ 0.40%, V: 0.04 ~ .25, N: 0.0050 ~ 0.020%, O: 0.0010 ~ 0.015%, Ti or A1 → Ti: 0.0020 ~ 0.040%, A1: 0.0040 ~ 0.05% alone or in combination, characterized in that the remainder is composed of Fe and inevitable impurities. In addition, the steel is in the weight% C: 0.24 to 0.50%, Si: 0.15 to 0.80%, Mn: 0.70 to 2.00%, S: 0.01 to 0.07%, Cr: 0.05 to 0.40%, V: 0.04 to 0.25, N: 0.0050 ~ 0.020%, O: 0.0010 ~ 0.015%, Ti or A1 → Ti: 0.0020 ~ 0.040%, A1: 0.0040 ~ 0.02% alone or in combination, other than Ca: 0.0002 ~ 0.010%, Te: 0.10% or less, Se: The shape of an inclusion is controlled by adding one or more types of 0.10% or less, Pb: 0.30% or less, Bi: 0.30% or less.

Description

절삭성이 향상된 고강도형 열간단조용 강재High strength hot forging steel with improved machinability

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 재가열 온도의 변화에 따른 오스테나이트 결정립의 크기의 변화를 나타내는 그래프,1 is a graph showing a change in the size of the austenite grains with a change in the reheating temperature of the present invention,

제2도는 본 발명의 알루미늄의 함량에 따른 MnS개재물의 크기 및 갯수의 변화를 나타내는 그래프2 is a graph showing the change in the size and number of MnS inclusions according to the aluminum content of the present invention

Claims (1)

중량%로 C : 0.24~0.50%, Si : 0.15~0.80%, Mn: 0.70~2.00%, S: 0.01~0.07%, Cr: 0.05~0.40%, V: 0.04~.25, N: 0.0050~0.020%, O: 0.0010~0.015%, Ti 또는 A1→Ti: 0.0020~0.040%, A1: 0.0040~0.05%의 단독 또는 복합첨가, 나머지가 Fe 및 불가피하게 포함되는 불순물로 이루어진 절삭성이 향상되된 고강도형 열간단 조용 강제By weight% C: 0.24 ~ 0.50%, Si: 0.15 ~ 0.80%, Mn: 0.70 ~ 2.00%, S: 0.01 ~ 0.07%, Cr: 0.05 ~ 0.40%, V: 0.04 ~ .25, N: 0.0050 ~ 0.020 %, O: 0.0010 ~ 0.015%, Ti or A1 → Ti: 0.0020 ~ 0.040%, A1: 0.0040 ~ 0.05% alone or in combination, high strength type with improved machinability consisting of Fe and inevitable impurities Hot quiet
KR1019950053479A 1995-12-21 1995-12-21 High strength hot forging steel with improved machinability KR970043224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950053479A KR970043224A (en) 1995-12-21 1995-12-21 High strength hot forging steel with improved machinability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950053479A KR970043224A (en) 1995-12-21 1995-12-21 High strength hot forging steel with improved machinability

Publications (1)

Publication Number Publication Date
KR970043224A true KR970043224A (en) 1997-07-26

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Application Number Title Priority Date Filing Date
KR1019950053479A KR970043224A (en) 1995-12-21 1995-12-21 High strength hot forging steel with improved machinability

Country Status (1)

Country Link
KR (1) KR970043224A (en)

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