The effect of laser surface modification on permeability and load capacity of porous sleeves

• Autorzy: Gocman K. , Kałdoński T. , Król A. , Giemza B.

Identyfikatory

DOI

10.5604/12314005.1161632

• Języki publikacji: EN

Abstrakty

EN

In this article some results of the research on the new generation slide porous bearings sintered from Höganas NC.100.24 iron powder, with 2.5% addition by weight of copper, with micro-segments (paths) made on their sliding surface with CO2 laser, with increased hardness and locally reduced surface porosity, are presented. The research was carried out within the framework of PBR/15-249/2007/WAT-OR00002904 Research Project financed by the Ministry of Science and Higher Education, during 2007 – 2011 [1]. Significant increase of the load capacity of the porous sleeves with paths, in comparison with the same Ø25/Ø35 x 20 mm sleeves without paths, was obtained. Durability of the bearings was also slightly higher; however, in comparison with the sleeves with macro-segments made of solid material, durability of the new generation bearings was several times higher. The sleeves sintered from iron powder with micro-segments made on their surface with the laser technique have not been previously known. Promising results in terms of increase of load capacity and durability caused that authors decided to submit a proper patent claim to the Polish Patent Office [2].

Słowa kluczowe

EN

porous sleeves; iron sinter; laser-made micro-segments

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2015
• Tom: Vol. 22, No. 1
• Strony: 107--114
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Gocman K.

• Military University of Technology, Faculty of Mechanical Engineering, Faculty of Logistics Gen. S. Kaliskiego Street 2, 00-908 Warsaw, Poland tel. [phone]

autor

Kałdoński T.

• Military University of Technology, Faculty of Mechanical Engineering, Faculty of Logistics Gen. S. Kaliskiego Street 2, 00-908 Warsaw, Poland tel. [phone]

autor

Król A.

• Military University of Technology, Faculty of Mechanical Engineering, Faculty of Logistics Gen. S. Kaliskiego Street 2, 00-908 Warsaw, Poland tel. [phone]

autor

Giemza B.

• Air Force Institute of Technology Księcia Bolesława Street 6, 01-494 Warsaw, Poland tel. [phone]

Bibliografia

• [1] Kałdoński, T. and the Development Team, Testing and preparation for implementation of porous plain bearings of new generation with increased capacity and sustainability, impregnated with eco-friendly oils containing selected surfactants, including ionic liquids. Final report about realization of development and research project no. PBR/15-249/2007/WAT-OR00002904, MUT. Warsaw, May 2012.
• [2] Kałdoński, and the Team, Żelazne łożyska porowate z mikrosegmentami wykonanymi techniką laserową na powierzchni ślizgowej łożyska (Iron porous bearings with micro-segments on their sliding surface, made with the laser technique) – P401051, 4.10.2012.
• [3] Bocchini, G.F., Capone, A., Capone, E., The four step porous bearing. Tribology International, pp. 330-332, December1978.
• [4] Capone, E., Niola, V., Bocchini, G. F., Further developments in porous bearing technology: the 20 permeability step bearing. Tribology International, pp. 294-296, December 1980.
• [5] ASTM B438/B438Ma: 2000, Standard Specification for Sintered Bronze Bearings (Oil-Impregnated).
• [6] ASTM B439: 2000, Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated).
• [7] ASTM B782: 2000, Standard Specification for Iron Graphite Sintered Bearings (Oil-Impregnated).
• [8] Metal Powder Industry Federation Standard 35 Material Standards for P/M Self – Lubricating Bearings 1998 edition.