بررسی تاثیر افزودن مس بر تعادل فازی و ریزساختار فولاد زنگ نزن s410

نوع مقاله : علمی و پژوهشی

نویسنده

• مهدی بهمنی اسکویی

گروه مهندسی مواد، دانشگاه صنعتی ارومیه،

10.22067/jmme.2022.75465.1041

چکیده

در این پژوهش تاثیر افزودن مس بر ریزساختار فولاد زنگ نزن s410 با استفاده از میکروسکوپ الکترونی روبشی مجهز به طیف سنج پراش انرژی پرتو ایکس مورد بررسی قرار گرفته است. همچنین فازهای در تعادل در ریزساختار و کسر وزنی آنها در دمای ℃1000 با استفاده از نرم افزار مت کلک ورژن 6 محاسبه شده است. نمونه ها در دمای ℃1000 آستنیته شده و درون روغن کوئنچ شدند. با توجه به نتایج حاصل از محاسبات ترمودینامیکی و تصاویر میکروسکوپ الکترونی روبشی، فولاد دو فازی با ریزساختاری شامل فریت و مارتنزیت تشکیل شد. مشخص شد که با افزایش مقدار مس در ترکیب شیمیایی فولاد، کسر وزنی فاز فریت در ریزساختار کاهش چشمگیری می‌یابد. کاهش کسر وزنی فاز فریت با اضافه شدن مقدار مس، منطبق بر نتایج حاصل از محاسبات ترمودینامیکی است. اضافه شدن حدود 5 درصد وزنی مس، موجب حذف شدن فاز فریت و تشکیل ریزساختار کاملا مارتنزیتی در نمونه های کوئنچ شده گردید.

کلیدواژه‌ها

• فولاد زنگ نزن
• مارتنزیت
• مس
• ساختار دوفازی
• محاسبات ترمودینامیکی

20.1001.1.20087462.1401.33.2.12.2

موضوعات

• متالورژی فیزیکی

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عنوان مقاله [English]

Investigation of the effect of copper addition on the phase equilibrium and the microstructure of 410s stainless steel

نویسنده [English]

• Mehdi Bahmani oskooee

Materials Science Department / Urmia University of Technology

چکیده [English]

In this study, the effect of copper addition on the microstructure of the 410s stainless steel was investigated by means of scanning electron microscopy which was equipped with energy dispersive X-ray spectroscopy (EDS). Also the phase equilibria and the phase fractions at 1000℃ were calculated using the software package MatCalc version 6.00. The samples were solution annealed at 1000℃ and quenched in oil. According to the results of thermodynamic calculations and scanning electron microscopy images, dual-phase steel with microstructure including ferrite and martensite was formed. It was found that by increasing the amount of copper in the chemical composition of steel, the weight fraction of the ferrite phase in the microstructure decreases remarkably. The phase fraction of ferrite decreases with increasing copper content in agreement with the thermodynamic calculations. The addition of about 5 wt.% copper eliminated the ferrite phase and led to a fully martensite microstructure in the quenched samples.

کلیدواژه‌ها [English]

• stainless steel
• martensite
• copper
• dual-phase microstructure
• thermodynamic calculation

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