KR970070228A

KR970070228A - High Strength Rapid Carburizing Steel and Method for Manufacturing the Same

Info

Publication number: KR970070228A
Application number: KR1019960011265A
Authority: KR
Inventors: 문길수; 부상운
Original assignee: 서순화; 기아특수강 주식회사
Priority date: 1996-04-15
Filing date: 1996-04-15
Publication date: 1997-11-07

Abstract

본 발명은 자동차 및 산업기계등의 고피로 강도를 필요로 하는 치차에 사용되는 고강도 신속침탄용 강을 개시한다.The present invention discloses a high strength, quick carburizing steel used in a gear requiring high fatigue strength, such as automobiles and industrial machines.

고강도 신속침탄용 강은 중량%로, C : 0.10~0.25%, Si : 0.05~0.15%, Mn : 0.50~1.00%, Cr : 0.50~1.50%, Mo : 0.35~0.50%, V : 0.01~0.10%, Nb : 0.01~0.07%, Al : 0.005~0.04%, N : 0.006~0.014%를 함유하고, 불순물로써 O : 0.0030%이하를 함유하고, 잔량은 Fe 및 제강중 불가피한 불순물을 포함한다.The steel for high strength and quick carburizing is composed of 0.10 to 0.25% of C, 0.05 to 0.15% of Si, 0.50 to 1.00% of Mn, 0.50 to 1.50% of Cr, 0.35 to 0.50% of Mo, 0.001 to 0.04% of N, 0.005 to 0.04% of Al, and 0.006 to 0.014% of N, and 0.0030% or less of O as impurities, the balance being Fe and unavoidable impurities in steelmaking.

Description

Steel for high strength quick carburizing and method for manufacturing the same.

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 본 발명의 실시예에 따른 고강도 신속침탄용 강에서 V과 Nb의 함량이 발명강의 인장강도에 미치는 영향을 나타낸 그래프, 제6도는 본 발명의 실시예에 따른 유효경화층(Hv 550)이 0.5mm이상 되는 침탄 온도와 침탄시간의 관계를 나타낸 그래프.FIG. 6 is a graph showing the effect of the contents of V and Nb on the tensile strength of the steel according to the present invention, FIG. 6 is a graph showing the effect of the effective hardening layer Hv 550 according to the present invention, Is a graph showing the relationship between the carburization temperature and the carburization time, which is 0.5 mm or more.

Claims

The steel sheet according to any one of claims 1 to 3, wherein the steel contains 0.10 to 0.25% of C, 0.05 to 0.15% of Si, 0.50 to 1.00% of Mn, 0.50 to 1.50% of Cr, 0.35 to 0.50% of Mo, 0.01 to 0.10% And the balance of Fe and unavoidable impurities in steel are contained in an amount of 0.007 to 0.07%, 0.005 to 0.04% of Al, and 0.006 to 0.014% of N and 0.0030% or less of O as impurities.

The steel sheet according to any one of claims 1 to 3, wherein the steel contains 0.10 to 0.25% of C, 0.05 to 0.15% of Si, 0.50 to 1.00% of Mn, 0.50 to 1.50% of Cr, 0.35 to 0.50% of Mo, 0.01 to 0.10% Strength steel for rapid carburization containing 0.07% of Al, 0.005 to 0.04% of Al, 0.006 to 0.014% of N, 0.0030% or less of O as impurities and the remaining amount of Fe and unavoidable impurities in steelmaking Processing; Wherein the carburizing treatment is carried out after the carburizing heat treatment at 950 to 1,000 DEG C is carried out after the normalizing treatment step.

The method according to claim 2, wherein the hot working is hot forging or hot rolling.

※ Note: It is disclosed by the contents of the first application.