Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: clad layer

Sortuj według:

Ogranicz wyniki do:

Analysis of one-dimensional inelastic deformation of the clad layer by rolling for restoration of flat surface parts

Pham Huy-Tuan, Bulekbayeva Gulmira Zhaibergenovna, Tabylov Abzal Uteuovich, Bukayeva Amina Zakharovna, Suieuova Nabat Bazarkhanovna, Yusupov Asgerbek Alievich, Bilashova Gulmira Smagulovna, Mambetaliyeva Gulsara Sapiyevna

Journal of Machine Engineering

2024

Vol. 24, No. 1

87--102

The hardening-finishing treatment of parts surface with rolling by steel cylindrical rollers produces low roughness, reduced residual compression stresses, and fine-grained structure due to plastic deformations. The deformation of metals during machining at high temperatures is characterized by a significant influence of strain rates on stresses. This necessitates the calculation of stresses and strains based on the equation of state of rheonic bodies. This study aims to determine the components of stresses and force factors of the technological process of finishing and strengthening machining of the surface of parts by deriving the analytical solutions to calculate the stress- strain state within the deformation zone based on creep theory. In this problem, general formulas are obtained for calculating the stress-strain state, pressure and friction forces on the contact surface, as well as forces and moments acting on the roller. Numerical analysis using Mathcad explores the understanding of the stress-strain state in the deformation zone on the force factors of the technological process. The obtained results are beneficial for establishing the mode of thermomechanical processing and selecting appropriate technological equipment for restoring flat surface parts.

Morfologia napawanych warstw na bazie kobaltu po utlenianiu i korozji w gazach spalinowych

Smoleńska H.

Problemy Eksploatacji

2006

nr 1

115-121

Przedmiotem badań były warstwy wytworzone z proszku na bazie kobaltu, napawane laserowo i plazmowo na przylgnie zaworów wylotowych silników Diesla. Dla wszystkich warstw stwierdzono dobrą jakość, brak pęknięć i jednorodność struktury na powierzchni. Badania degradacji wykonano w specjalnie wykonanej komorze w gazach spalinowych silnika okrętowego. Badania napoin przeprowadzono po 2 miesiącach ekspozycji w podwyższonej temperaturze w zakresie 600-800°C lub po utlenianiu w powietrzu w temperaturze 650°C przez 100 godzin.

Cobalt base cladding layers on the exhaust valve head face, produced by laser and PTA cladding have been investigated. For the all sort of layers good quality, lack of cracks and proper microstructure for the top part of clad was obtained. The investigations on the degradation process run on the special chamber in the exhaust gases of the ship diesel engine. The layers were exposed for two month for the exhaust gases at elevated temperature 600-800°C and after oxidation in air at temperature 650°C for 100 hours. The chemical and phase composition of the scale were determined.