Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: alloyed steel

Sortuj według:

Ogranicz wyniki do:

Stress Corrosion Cracking Evaluation of High Alloy Steel (X2CrNiMoN 22-5-3) by DET

Lasek S., Blahetová M., Číhal V.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2004

z. 78

17-22

Stress corrosion cracking (SCC) can cause a dangerous failure of structural parts under specific combination of material, environment and loading. For testing of the resistance to SCC at higher temperatures (100-300°C) in water environments were proposed several methods. The Drop Evaporation Test (DET) is useful for comparison and evaluation of resistance of stainless steels and related alloys to SCC in chlorides containing water environments [1,2]. This test is valid in the cases, when evaporation of water environments can increase the content of anions (Cl-) and there is also possibility to form a salt deposition as a crevice on material surface. The advantage of DET is possibility of testing at higher temperature in the range 100~500°C using a lower Cl- water content (0-100 ppm) in convenient gas around the specimen. During DET there is a good possibility to observe a sample surface, initiation and propagation of pitting and corrosion cracking [3]. The process of thermal and corrosion fatigue is superposed on SCC mainly in the stage of initiation and propagation of short cracks especially in case of a higher difference of temperature between drops and heated sample. The DET simulates also the influence of heat transfer from material into environment on localized corrosion under evaporating conditions. The aim of this contribution is the study of short corrosion cracks growth on duplex steel of type X2CrNiMoN 22-5-3 (1.4462) under DET conditions by travelling microscope method.

Wyniki badań zużycia ciernego wybranych stali stopowych stosowanych na koła zębate

Spałek J., Skoć A., Wieczorek A.

Tribologia

1999

nr 6

973-987

W opracowaniu przedstawiono wyniki doświadczalnych badań zużyciowych próbek walcowych wykonanych z wybranych stali stopowych stosowanych na koła zębate w przekładniach maszyn górniczych. Wyniki badań zużyciowych ujęto w postaci zaleanosci zużycia-ubytku masy od drogi i warunków tarcia. Próbki do przeprowadzonych badań na tribometrze AMSLER-SAE wykonano ze stali poddanych nawęglaniu(18H2N2,20H2N4A,15HN) węgloazotowaniu (15HN ) i azotowaniu (38HMJ).

In the paper results of experimental wearing proces observed in cylinder shape samples made of selected alloyed steelare presented.The experiments was oriented for the toothedwheel applied in reduction wear of mine equipment.Two fundamental parameters wwere comidered:loss in mass of sample vs friction parameters. Samples were made of carbonated steel(18H2N2,20H2N4A,15HN) nitrocarbonated (15hn0 and nitronated steel 38HMJ). The experiment was made by AMSLER-SAE tribotesting machine.