Bronze sealing rings defects and ways of its elimination

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationApplied Mechanics and Materials
Pages82-86
Number of pages5
Volume379
DOIs
Publication statusPublished - 2013
Event4th International Scientific Practical Conference with Elements of School for Junior Scientists ("Innovative Technologies and Economics in Engineering") - Yurga, Russian Federation
Duration: 23 May 201325 May 2013

Publication series

NameApplied Mechanics and Materials
Volume379
ISSN (Print)16609336
ISSN (Electronic)16627482

Conference

Conference4th International Scientific Practical Conference with Elements of School for Junior Scientists ("Innovative Technologies and Economics in Engineering")
CountryRussian Federation
CityYurga
Period23.5.1325.5.13

Keywords

  • Bronze
  • Cast defects
  • Casting
  • Centrifugal molding
  • Nanopowder
  • Sealing rings

ASJC Scopus subject areas

  • Engineering(all)

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