نتایج جستجو برای: 42crmo4 steelzro2

تعداد نتایج: 122  

Journal: :Cirp Journal of Manufacturing Science and Technology 2021

Manufacturing high precision and performance parts in aerospace, automotive medical industries often requires machining of difficult-to-cut materials such as titanium, nickel hardened alloyed steel alloys. Low productivity environmental damage are major problems cutting these materials, which vitally require optimized cooling strategies. High-pressure fluid supply (HP CF) cryogenic lubrication ...

Journal: :Applied Thermal Engineering 2023

Modeling heat conduction during steel-cooling processes is challenging because solid–solid phase transformations can take place, introducing highly non-linear phenomena to the equation. Using a linear model for inverse problem be helpful estimating dissipated flux, especially complex models that use empirical parameters are not always available. However, performance and applicability of such si...

Journal: :Sustainable Materials and Technologies 2022

In material development processes, the question if a new alloy is more sustainable than existing one becomes increasingly significant. Existing studies on metals and alloys show that their composition can make difference regarding environmental impact. this case study, recently developed air hardening forging steel used to produce U-bolt as an example component in automotive engineering. The pr...

Journal: :Journal of manufacturing and materials processing 2022

Subtractive manufacturing processes are usually accompanied by the occurrence of tiny flakes and swarf, which later on cause severe wear damage, especially in moving components such as rolling or sliding bearings, pistons, etc. However, up until now, detrimental effects have hardly been investigated. One reason is lack a definition typical design debris particle. Therefore, main goal project de...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی 1389

چرخ دنده یکی از مهم ترین اجزای مکانیکی مورد کاربرد در سیستم های صنعتی می باشد که اغلب به علت خستگی مکانیکی، آسیب دیده و کارایی مطلوب خود را از دست می دهد. خستگی مکانیکی موجب می گردد که چرخ دنده ها در باری کمتر از حد تسلیم، تخریب گردند. در نتیجه بایستی در حین طراحی چرخ دنده ها عمر کاری مورد نیاز آن ها نیز محاسبه گردد. شکست در ناحیه ریشه دنده و کچلی سطح دنده دو عامل از کارافتادگی دنده ها می باشند...

Journal: :SOJ materials science & engineering 2021

The aim of this work was to study the microstructure and friction coefficient hybrid surface layers, produced by a controlled gas nitriding laser modification. Nitriding is well-known technique thermo-chemical treatment, applied in order produce layers improved hardness wear resistance. phase composition growth kinetics diffusion layer can be using with changeable potential. 42CrMo4 steel treat...

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