چکیده مقاله
Weld overlay using martensitic ER410NiMo filler metal on carbon steels is a common method to improve the wear and corrosion resistance of valve's trim in oil and gas industries However, severe dilution at the fusion boundary and uncontrolled mixing of the molten weld metal with the A105 base steel can lead to chromium loss, formation of low chromium martensite, and a reduction in final hardness In this study, to control dilution and enhance the metallurgical behavior of the overlay, the effect of employing a ferritic ER430 buffer layer in ER410NiMo weld overlay on A105 steel was investigated For this purpose, two configurations were prepared: a sample without a buffer layer two consecutive passes of ER410NiMo on A105 and a sample with a buffer layer first pass ER430 followed by a final pass of ER410NiMo , both deposited under identical thermal conditions and in accordance with API RP 582 guidelines Macrographic examination, optical metallography, SEM analysis, line scan EDS, XRF, and micro Vickers hardness testing showed that the presence of the ER430 buffer layer reduced penetration depth and fusion zone width, prevented severe chromium depletion in the dilution zone, refined and homogenized the martensitic structure of the final overlay, and increased the hardness and its uniformity across the cladding thickness Therefore, the use of an ER430 buffer layer in ER410NiMo weld overlay can serve as an effective practical approach to enhance the performance of carbon steel valve's trim operating under severe service conditions
کلیدواژهها
نویسندگان
Ehsan Hatami
Supervisor of the Quality Control Department, Petro Fajr Markazi Valve Manufacturing Company, Iran
Ali Gholami
Manager of the Engineering & Design Department, Petro Fajr Markazi Valve Manufacturing Company, Iran
شیوه ارجاع
Hatami, Ehsan and Gholami, Ali,1404,Investigation of ER430 Buffer Layer Effects on Chromium Dilution, Mechanical Properties, and Microstructure in ER410NiMo Weld Overlay on Carbon Steel,8th International Conference on Welding and Non Destructive Testing & 26th National Conference on Welding & Inspection & 15th National Conference on NDT & 4th National Conference on Additive Manufacturing,Tehran
ارائهشده در
مجموعه مقالات هشتمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب، بیست و ششمین کنفرانس ملی جوش و بازرسی، پانزدهمین کنفرانس ملی آزمایش های غیرمخرب و چهارمین کنفرانس ملی ساخت افزایشی20 بهمن 1404 · تهران