Wszystkie pola: mild wear - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A Study on Tribological Behaviour of Electro Discharge Deposited ZE41A Magnesium Alloy Using Wear Map
Autorzy:: Elaiyarasan, U.
Satheeshkumar, Vinaitheerthan
Senthilkumar, Chinnamuthu
Powiązania:: https://bibliotekanauki.pl/articles/2049674.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ZE41A magnesium alloy
electro discharge deposition
wear mechanism map
mild wear
abrasion
Opis:: The paper studied the tribological behaviour of electro discharge deposited ZE41A magnesium alloy using wear map. The wear experiments are conducted using pin on disc technique for different parameters such as applied load (1.5 kg-3.5 kg), sliding speed (100 rpm-200 rpm) and sliding time (3 min-7 min). Wear mechanism map is constructed by taking the applied load on y-axis and sliding speed on x-axis. The wear mechanism map is utilized to study the dominance of particular wear mechanism that dominates particular wear regimes such as mild wear, severe wear and ultra severe wear. It is observed that the wear rate increased with increased the applied load and sliding speed. Various mechanisms such as abrasion, oxidation, delamination and melting are identified through scanning electron microscope (SEM).
Źródło:: Archives of Metallurgy and Materials; 2021, 66, 2; 391-396
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hardfacing of mild steel with wear-resistant Ni-based powders containing WC particles using PPTAW technology
Autorzy:: Appiah, Augustine
Bialas, Oktawian
Jędrzejczyk, Marcelina
Ciemała, Natalia
Wantuch, Łucja
Żuk, Marcin
Czupryński, Artur
Adamiak, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/24010905.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Opis:: This study explores the use of powder plasma transferred arc welding (PPTAW) as a surface layers deposition technology to form hardfaced coatings to improve upon the wear resistance of mild steel. Hardfaced layers/coatings were prepared using the PPTAW process with two different wear-resistant powders: PG 6503 (NiSiB+60% WC) and PE 8214 (NiCrSiB+45% WC). By varying the PPTAW process parameters of plasma gas flow rate (PGFR) and plasma arc current, hardfaced layers were prepared. Microscopic examinations were carried out to investigate the microstructure and surface characteristics of the prepared hardfaced layers. Penetration tests were performed to ascertain the number and depth of crack sites in the prepared samples by visual inspection. The hardness of the hardfaced layers were determined: hardfacings prepared with PG 6503 had hardness of 46.3 - 48.3 HRC, those prepared with PE 8214 had hardness of 52.7 - 58.3 HRC. The microhardness of the matrix material was in the range of 573.3 - 893.0 HV, and the carbides had microhardness in the range of 2128.7 - 2436.3 HV. Abrasive wear resistance tests were carried out on each prepared sample to determine their relative abrasive wear resistance relative to the reference material, abrasion resistant heat-treated steel, Hardox 400, having a nominal hardness of approximately 400 HV. Findings from the research showed that the wear resistance of the mild steel was improved after deposition of hardfaced layers; the hardness and wear resistance were increased upon addition of Cr as an alloying element; increasing the PGFR increased the hardness and wear resistance of the hardfacings, as well as increase in the number of cracks; increasing the PTA current resulted in hardfacings with less cracks, but relatively lowered the wear resistance. The wear mechanisms were discussed.
Źródło:: Welding Technology Review; 2022, 94; 3--18
0033-2364
2449-7959
Pojawia się w:: Welding Technology Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Development of predictive force models for oblique cutting of mild carbon steel (CS1030) incorporating tool flank wear
Autorzy:: Ipilakyaa, Tertsegha
Powiązania:: https://bibliotekanauki.pl/articles/95275.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: oblique cutting
tool flank wear
machining
cutting force model
skrawanie skośne
zużycie ostrza skrawającego
obróbka skrawaniem
model siły skrawania
Opis:: Predictive force models for oblique metal cutting incorporating tool flank wear was carried out using a CNC lathe machine to turn mild carbon steel CS1030. The developed models are based on the fundamental mechanics of orthogonal cutting process, in which inclination angle is 0°. Workpieces were Cylindrical with wall thickness of 3mm and diameter of 100 mm. Cut thickness levels were 0.1, 0.17, 0.24 and 0.31 mm; cutting speeds were 100, 150 and 200 m/min; tool rake angle levels were -5, 0 and 5°. wearland sizes were selected as 0, 0.2, 0.4, 0.6 mm, where wearland size “0 mm” represents sharp tool. Results of the study indicate that tool flank wear has significant effect on oblique cutting forces. The oblique cutting forces were found to increase linearly with tool flank wear due to rubbing or ploughing forces in the wearland. The results also show that, the measured experimental oblique forces (power force, Fcm thrust force Ftm and rubbing force Frm) agreed with the predicted (power force Fc thrust force Ft, and rubbing force Fr) values under the corresponding cutting conditions. It is evident from the plots that the models give an excellent prediction of the cutting forces during oblique cutting.
Źródło:: Journal of Mechanical and Energy Engineering; 2019, 3, 4; 295-299
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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