M. Rafiei
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
[ 1 ] - The Interface Structure in Dissimilar Welding of AISI 4130 to AISI 316L Steels Using ERNiCr-3 Filler Metal
In this research the interface structure of dissimilar joint between AISI 4130 and AISI316L steels produced by GTAW process was evaluated. ERNiCr-3 was used as a filler metal for this joint. After welding the microstructure of different areas including weld metals, heat affected zones and interfaces were studied by optical microscope (OM), scanning electron microscope (SEM) and energy dispersiv...
[ 2 ] - Tribological Properties of B4C-Ni Cermet Coating Produced by HVOF Process on the Surface of 4130 Steel
In this research, B4C-Ni cermet coating was sprayed on the surface of 4130 steel from B4C and Ni feed-stockpowders using high velocity oxy-fuel (HVOF) method. In order to characterize the tribological behavior of thecoating, ball on disk wear tests were done at the ambient temperature and under the loads of 1, 3 and 5 N.Phase analysis of the coating after spraying was studied ...
[ 3 ] - تاثیر افزودن سیلیسیوم بر ریزساختار و خواص تریبولوژیکی روکشهای Fe-Al تولید شده توسط فرایند GTAW
در این پژوهش به ارزیابی ریزساختار و رفتار تریبولوژیکی فولاد کربنی CK45 پوشش داده شده با آلیاژهای Fe-Al و Fe-Al-Si با استفاده از فرآیند GTAW پرداخته شد. جهت بررسی ریزساختارهای تشکیل شده از میکروسکوپ نوری و همچنین جهت تعیین فازهای موجود روی سطح روکشها از آزمون پراش اشعه ایکس (XRD) استفاده شد. جهت ارزیابی رفتار سایشی روکشهای ایجاد شده از آزمون سایش پین روی دیسک در دو دمای محیط و 500 درجه سان...
[ 4 ] - Effect of Temperature and Time on the Joint Properties of AISI420 Steel to SAF2507 Steel Produced by Transient Liquid Phase Process
In this research, the effect of temperature and time on the properties of AISI420/SAF2507 dissimilar joint produced by transient liquid phase bonding process was investigated. A BNi-2 interlayer with 25 μm thickness was inserted between two dissimilar steel samples. The bonding process was performed at 1050 oC and 1100 oC for different bonding times. The microstructures of the joints were studi...
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