KR970043224A - High strength hot forging steel with improved machinability - Google Patents
High strength hot forging steel with improved machinability Download PDFInfo
- 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
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- high strength
- hot forging
- strength hot
- improved machinability
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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
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)
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 |
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KR970043224A true KR970043224A (en) | 1997-07-26 |
Family
ID=66646676
Family Applications (1)
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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1995
- 1995-12-21 KR KR1019950053479A patent/KR970043224A/en not_active Application Discontinuation
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