بررسی رفتار اکسیداسیون هم‌دما و سیکلی فولاد زنگ‌نزن430 پوشش داده شده با رسوب هم‌زمان آلومینیوم و تیتانیوم

نویسندگان

1 1. بخش مهندسی مواد، دانشکده فنی و مهندسی، دانشگاه شهید باهنر کرمان

2 2. بخش مهندسی مواد، دانشکده مهندسی مکانیک و مواد، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته

چکیده

چکیده- برای افزایش مقاومت به اکسیداسیون و خوردگی داغ فولاد­ها می­توان عناصر مختلفی از جمله آلومینیوم، کروم، سیلیسیم، تیتانیوم و یا ترکیبی از آنها را روی سطح نفوذ داد. در این تحقیق با استفاده از فرایند سمانتاسیون فشرده پوشش هم‌زمان آلومینیوم- تیتانیوم روی زیرلایه فولاد زنگ‌نزن فریتی 430 AISI ایجاد شد. پوشش توسط میکروسکوپ الکترونی روبشی (SEM) و پراش پرتو ایکس (XRD) مورد بررسی قرار گرفت. پوشش حاصل شامل دو لایه به ضخامت حدود 14 میکرومتر بود. نتایج آزمون پراش پرتو ایکس وجود فازهای FeTi، 2TiO، AlTi، Ti3Al و Ti5Al را نشان داد. اکسیداسیون هم‌دما و اکسیداسیون سیکلی در دمای 1000 درجه سانتی‌گراد روی نمونه‌های بدون پوشش و پوشش­دار انجام شد. نتایج اکسیداسیون هم‌دما و سیکلی نشان داد پوشش نفوذی آلومینیوم- تیتانیوم باعث بهبود مقاومت به اکسیداسیون فولاد زنگ­نزن فریتی 430 AISI شد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of Isothermal and Cyclic Oxidation Behavior of Codeposited 430 Ferritic Stainless Steel with Aluminum and Titanium

نویسندگان [English]

  • M. Mahmoudi Saleh Abad 1
  • M. Zandrahimi 1
  • H. Ebrahimi far 2
1 1. Department of Materials Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman
2 2. Department of Materials Engineering, Faculty of Mechanical and Materials Engineering, Graduate University of Advanced Technology.
چکیده [English]

In order to improve the oxidation and hot corrosion resistance of steels, various elements including aluminum, chromium, silicon, titanium or combination of these elements can be diffused on to the surface of steel. In this study, aluminum and titanium were simultaneously co-deposited onto the AISI 430 ferritic stainless steel substrate by the pack cementation process. Coating was examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The coating consised of two layers with the thickness of approximately 14 microns. The results obtained by XRD showed the existence of FeTi, TiO2, AlTi, Al3Ti and Al5Ti phases in the coating. Isothermal oxidation and cyclic oxidation were carried out at 1000○C. It was showed that the diffusional coating of aluminum-titanium led to the improvement of cycle and isothermal oxidation resistance.

کلیدواژه‌ها [English]

  • AISI 430 steel
  • Pack cementation
  • Aluminum-titanium deposition
  • Oxidation

مراجع

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مواد پیشرفته در مهندسی
دوره 37، شماره 3
آذر 1397
صفحه 13-23

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