STEEL FOR GEAR AND METHOD FOR MANUFACTURING GEAR USING THE SAME

The present invention relates to steel for a gear having improved fatigue resistance properties and a gear manufacturing method using the same. The steel for a gear according to an embodiment of the present invention contains C: 0.10 to 0.30 wt%, Si: 0.60 to 0.80 wt%, Mn: 0.25 to 0.75 wt%, Cr: 1.80...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KANG CHANG WON, KANG MIN WOO, KIM DONG HWI, KIM MYUNG SIK, LEE IN BEOM, HONG SUNG MIN, NAM GUNG SEUNG, LEE SANG WON
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to steel for a gear having improved fatigue resistance properties and a gear manufacturing method using the same. The steel for a gear according to an embodiment of the present invention contains C: 0.10 to 0.30 wt%, Si: 0.60 to 0.80 wt%, Mn: 0.25 to 0.75 wt%, Cr: 1.80 to 2.20 wt%, Ni: 0.50 to 1.50 wt%, Mo: 0.20 to 0.40 wt%, Nb: 0.025 to 0.050 wt%, V: 0.030 to 0.050 wt%, the remainder Fe, and other unavoidable impurities and satisfies the following relational expression 1: 0.055 < [Nb] + [V] < 0.100. Here, [Nb] is the content of Nb, and [V] is the content of V. 본 발명은 내피로 물성을 향상시킨 기어용 강재 및 이를 이용한 기어 제조방법에 관한 것이다. 본 발명의 일 실시형태에 따른 기어용 강재는 C: 0.10 ~ 0.30wt%, Si: 0.60 ~ 0.80wt%, Mn: 0.25 ~ 0.75wt%, Cr: 1.80 ~ 2.20wt%, Ni: 0.50 ~ 1.50wt%, Mo: 0.20 ~ 0.40wt%, Nb: 0.025 ~ 0.050wt%, V: 0.030 ~ 0.050wt%, 나머지 Fe 및 기타 불가피한 불순물을 함유하고, 하기의 을 만족하는 것을 특징으로 한다. 0.055 < [Nb]+[V] < 0.100 ... 여기서, [Nb]는 Nb의 함량이고, [V]는 V의 함량임.