مواد و فناوری‌های پیشرفته

مواد و فناوری‌های پیشرفته

اثر ساچمه‌زنی پرانرژی بر خواص پوشش استلایت 6 اعمال‌شده روی فولاد زنگ‌نزن 316 به روش لایه‌نشانی جرقه ‌الکتریکی

نوع مقاله : مقاله کامل پژوهشی

نویسندگان
مهدی غلام پور 1
محمد حسن عامری 2
1 استادیار، گروه فیزیک، دانشکده علوم پایه، دانشگاه امام علی، تهران، تهران، ایران
2 کارشناسی ارشد، گروه فیزیک، دانشکده علوم پایه، دانشگاه امام علی، تهران، تهران، ایران
10.30501/jamt.2021.243604.1115
چکیده
 آلیاژ استلایت 6، به روش لایه­ نشانی جرقه الکتریکی، روی زیرلایه­ ای از جنس فولاد زنگ‌نزن آستنیتی، لایه­ نشانی شد. نتیجه‌ی لایه ­نشانی، پوششی چسبنده به ضخامت 10 ± 100 میکرون بود. به ­منظور بهبود ویژگی­ های پوشش استلایت 6 ایجاد­ شده به روش جرقه الکتریکی، از فرایند ساچمه­ زنی پرانرژی، استفاده شد. ریزساختار پوشش، تغییرات ترکیب شیمیایی از سطح تا عمق، رفتار سایشی پوشش، ریزسختی و عیوب لایه پوشش قبل و بعد از فرایند ساچمه­ زنی پرانرژی، با استفاده از تصاویر میکروسکوپ الکترونی روبشی نشر میدانی و میکروسکوپ نوری، آنالیز عنصری خطی و ارزیابی سایشی پین روی دیسک، بررسی شد و تأثیر فرایند ساچمه­ زنی روی پوشش استلایت، مورد مطالعه قرار گرفت. نتایج نشان می­ دهد که ساچمه ­زنی پرانرژی بر سطح پوشش استلایت 6 (ایجاد­ شده به روش لایه­ نشانی جرقه الکتریکی) سبب می­ شود که مشخصه زبری سطح پوشش از 14 به 5/4 میکرون کاهش یابد و سختی آن از 450 به 540 ویکرز افزایش پیدا کند؛ از طرفی خواص سایشی پوشش بهبود یابد، میزان عیوبی نظیر تخلخل­ ها، کم شده و میکروترک­ها و نقص در ذوب شدگی­ ها در اثر تنش­ های پسماند فشاری و تغییر شکل موم‌سان شدید، کور شوند.
کلیدواژه‌ها
لایه‌نشانی جرقه الکتریکی
ساچمه‌زنی پر‌انرژی
استلایت 6
فولاد زنگ‌نزن آستنیتی 316

موضوعات

عنوان مقاله English

Effect of High Energy Shot Peening on Properties of Stellite 6 Layer Coated on AISI 316 Using Electro-Spark Deposition

نویسندگان English

Mahdi Gholampour 1
Mohamad Hasan Ameri 2
1 Assistant Professor, Department of Physics, Faculty of Basic Sciences, Imam Ali University, Tehran, Tehran, Iran
2 M. Sc., Department of Physics, Faculty of Basic Sciences, Imam Ali University, Tehran, Tehran, Iran
چکیده English

Stellite-6 alloy was deposited on a SS316 stainless steel substrate by Electro-Spark Deposition; subsequently, the thickness of deposition layer was around 100 ± 10 micron. High Energy Shot Peening process was applied to improve coated layer properties. Microstructure, chemical composition, micro hardness variation in cross sections, wear properties and visual check for discontinuities of coated layer were studied by employing Field Emission Scanning Electron Microscopy, Optical Microscopy, EDS line scan and pin on disk wear test, before and after the high energy shot peening process. The results show decreasing the surface roughness from 14 to 4.5 micron and improving the micro-hardness of coated layer from 450 to 540 HVN due to High Energy Shot Peening process on the Electro-Spark Deposition coated layers. On the other hand, the wear properties of the coating are improved, the number of defects such as porosities is reduced, and micro-cracks and defects in melts are healed due to compressive residual stress and severe wax deformation.

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مواد و فناوری‌های پیشرفته
دوره 10، شماره 2
تابستان 1400
صفحه 83-96

  • تاریخ دریافت 24 شهریور 1399
  • تاریخ بازنگری 20 آبان 1399
  • تاریخ پذیرش 12 مهر 1400