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Vpliv toplotne obdelave na statično nosilnost kotalnega stika
Drobnič, Katarina (Author), Prebil, Ivan (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-WMOZFD5D This link opens in a new window

Abstract
Utrjevanje tečine kotalnega ležaja vrtljive zveze zvišuje odpornost tečine proti obrabi in vtiskovanju kotalnih elementov vanjo. Glede na tehnološki postopek izdelave ležajnih obročev tečino primerno utrdimo z lokalno toplotno obdelavo. S tem dosežemo po preseku ležajnega obroča takšno mikrostrukturo materiala, ki zagotavlja na površini tečine visoko statično nosilnost kotalnega stika, hkrati pa se ohrani globalna elastičnost in lastnost dobre mehanske obdelovalnosti materiala vrtljive zveze. Na zakaljenih ležajnih obročih iz ogljikovega in krom-molibdenovega legiranega jekla sta bili hkrati analizirana mikrostruktura in preverjena nosilnost kotalnega stika. Rezultati analize materialov in meritev nosilnosti potrjujejo smiselnost uporabe tehnologije indukcijskega kaljenja pri utrjevanju tečine, kot tudi opozarjajo na možne napake, ki pri tem nastanejo. Kalilne razpoke, zgornji bainit, podhlajeni avstenit in pretanka kaljena plast zmanjšujejo nosilnost tečine. Končna porušitev tečine se izrazi s površinskimi razpokami in vsedom kaljene plasti v mehkejši osnovni material.

Language:Slovenian
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:1997
Publisher:Inštitut za kovinske materiale in tehnologije
Number of pages:str. 135-138
Numbering:Letn. 31, št. 1/2
UDC:621.8
ISSN on article:1318-0010
COBISS.SI-ID:2485531 Link is opened in a new window
Views:633
Downloads:80
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Record is a part of a journal

Title:Kovine zlitine tehnologije
Shortened title:Kovine zlit. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije, ACRONI, Inštitut Josef Stefan, IMPOL, Fakulteta za strojništvo, Slovensko društvo za tribologijo, METAL, TALUM
ISSN:1318-0010
COBISS.SI-ID:31742209 This link opens in a new window

Secondary language

Language:English
Title:The influence of heat treatment on static load carrying capacity of rolling contact
Abstract:
Hardening of the rotational connection bearing raceway increases the resistance of the bearing against wear and impression of the rolling elements. The raceway is hardened using heat treatment locally, considering the technological process of the bearing ring manufacture. In this way the ring surface has a microstructure providing a high static carrying capacity of the rolling contact, and in the same time retaining the global elasticity and good machining properties of the rotational connection material. The microstructure analysis and carrying capacity of the rolling contact have been carried out on hardened bearing rings made of carbon and chrome-molybdenum alloyed steel. The results of the material analysis and carrying capacity measurements confirm the suitability of the use of induction hardening for the raceway hardening, and also show the possible errors that can emerge in the process. Hardening cracks, upper bainite, supercooled austenite, and excessively thin hardened layer decrease the carrying capacity of the raceway. The final breakdown of the raceway shows as surface cracks, and deep impressions of the hardened layer in the softer base material.


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