Laser cladding iron-based alloy powder for repairing steam turbine rotor journal and preparation and application thereof

The invention provides iron-based alloy powder. The iron-based alloy powder is prepared from the following components in percentage by mass: 0.04%-0.07% of C, 0.90%-1.20% of Cr, 0.4%-0.9% of Mo, 0.4%-0.7% of Si, 0.5%-0.8% of Mn, 0-0.6% of B and the balance of Fe. A laser cladding layer obtained thro...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG QUNLI, DONG GANG, CHEN ZHIJUN, YAO JIANHUA, BIAN SHUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CASTING 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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	The invention provides iron-based alloy powder. The iron-based alloy powder is prepared from the following components in percentage by mass: 0.04%-0.07% of C, 0.90%-1.20% of Cr, 0.4%-0.9% of Mo, 0.4%-0.7% of Si, 0.5%-0.8% of Mn, 0-0.6% of B and the balance of Fe. A laser cladding layer obtained through the alloy powder has excellent bonding strength, low metallurgical defects and a low dilution rate, the toughness and hardness of the cladding layer are improved, the use requirements are met, and the defects on the surface of a 30Cr2Ni4MoV steam turbine rotor journal can be effectively repaired. 一种铁基合金粉末，由如下质量百分含量的成分组成：碳C：0.04～0.07％，铬Cr：0.90～1.20％，钼Mo：0.4～0.9％，硅Si：0.4～0.7％，锰Mn：0.5～0.8％，硼B：0～0.6％，余量为Fe；采用本发明合金粉末获得的激光熔覆层，具有优异的结合强度，较低的冶金缺陷和较低的稀释率，且提高了熔覆层的韧性，硬度满足使用要求，能够有效修复30Cr2Ni4MoV汽轮机转子轴颈表面的缺陷。