@inproceedings{8dac9dc955224a1487a28dfba853e7a9,
title = "Bronze sealing rings defects and ways of its elimination",
abstract = "In the article data about application nanopowder on a structure of coatings of the form are submitted at a casting of lead-tin bronzes. Elimination of gas porosity on a surface bronze cast preparations of high pressure compressors piston rings was the primary goal of such application protectively-dividing coverings. For experimental works mark of multicomponent bronze has been chosen. Its structure includes tin, lead, zinc and nickel. Casting from this bronze received a method of centrifugal molding. Influence of a structure of used protective - separating coating of a foundry core on a surface smoothness was probeed. Was compared action of coatings of a following composition: anti-burning-in coating (a blend of a low dispersible powder of chromium oxide with calcinated vegetable oil); anti-burning-in material ASPF-2/RgU (on the basis a low dispersible powder of graphite and the calcinated vegetable oil); the patent No. 2297300 (blend of a ultradispersible powder of dioxide of zirconium with inpowderrial oil. Molding without use of coverings leads porosity depth to 4-5 mm and to a marriage significant amount (to 50%). Use ASPF-2/RgU completely eliminates welding casting to a casting mold, but porosity on a surface remains. Application of coverings of a casting mold containing in quality of a filler ultradisperse powders oxide metals with low heat conductivity allows in to lower much a roughness and to eliminate gas porosity on a cast surface from lead-tin bronze. A gas time of a surface still remains, but them becomes much less and their form changes. Depth of defects doesn't exceed 1-1,5 mm that doesn't fall outside the limits the admission.",
keywords = "Bronze, Cast defects, Casting, Centrifugal molding, Nanopowder, Sealing rings",
author = "Martyushev, {N. V.} and Pashkov, {E. N.}",
year = "2013",
doi = "10.4028/www.scientific.net/AMM.379.82",
language = "English",
isbn = "9783037857991",
volume = "379",
series = "Applied Mechanics and Materials",
pages = "82--86",
booktitle = "Applied Mechanics and Materials",
note = "4th International Scientific Practical Conference with Elements of School for Junior Scientists ({"}Innovative Technologies and Economics in Engineering{"}) ; Conference date: 23-05-2013 Through 25-05-2013",
}