Wyniki wyszukiwania - BazTech

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Techniki spawalnicze w odlewnictwie. Napawanie

Wojciechowski W., Kowalski J. S.

Archives of Foundry Engineering

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2013

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Vol. 13, iss. 1 spec.

87--90

PL

W artykule omówiono problemy związane z naprawami wad odlewniczych. Przeanalizowano możliwości naprawy odlewów metodami spawalniczymi. Opisano technologię naprawy przez napawanie wlewnic wykonanych z żeliwa szarego. Napawanie prowadzono ręcznie elektrodami otulonymi oraz w osłonie gazów metodą MAG. Oceniono mikrostrukturę stref napawanych naprawianych odlewów oraz wyniki pomiarów twardości i rozkład mikrotwardości.

EN

In this paper discusses issues related to the repair of large castings. Analyzed the possibility repair of castings of welding methods. Describes the technology of repair by welding of cast iron ingot molds. Welding with coated electrodes was carried out manually and gas shielded MAG. Rated zones padded structure and performance measurement and distribution of microhardness.

2

GTA remelting of surface spot defects

Klimpel A., Luksa K., Kik T.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 25, nr 2

73-76

EN

Purpose: A statistical model that explains the interaction between cross-section dimensions of a GTA remelted spot area and remelting parameters is presented. It will be utilized in the repair of an investment casting made of nickel-based superalloys. Design/methodology/approach: An experimental design of response surface was used to elaborate the model of GTA remelting. Results of experiments were verified experimentally. Findings: The dimensions and volume of a remelted area are a linear function of the GTA welding process parameters. It is possible to remelt small surface defects and keep a smooth surface. Research limitations/implications: Research results are limited to the tested range of parameters and base material properties. Changes in thermal conductivity can strongly influence the presented results. Crack sensitivity of material can restrict the range of parameters. Practical implications: Results of the research will help in the repair of surface spot defects of nickel-based superalloys. The proposed method of repair can help to minimize the number of rejected parts. Originality/value: A new approach to welding technology is presented. A statistical model of GTA remelting process could be a useful tool for the precise selection of process parameters.

3

Naprawa spawaniem i kontrola nieniszcząca odlewów żeliwnych

Orłowicz W., Opiekun Z., Mróz M.

Krzepnięcie Metali i Stopów

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1998

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nr 36

287--294

PL

W pracy przedstawiono sposób naprawy odlewów z żeliwa szarego i sferoidalnego o osnowie ferrytycznej oraz ultradźwiękową metodę diagnozowania miejsc naprawy.

EN

The paper presents method to repair castings made from gray iron and spheroidal graphite iron of ferritic matrix, as well as ultrasonic method to diagnose locations that need to be repaired.