Inconel 625-AISI 304L Malzeme Çiftinin Yüksek Nikelli İlave Metal ile Birleştirilmesi: Mikroyapısal ve Mekanik Özellikler

Year 2018, Volume: 33 Issue: 2, 73 - 82, 30.06.2018

Mustafa Tümer

https://doi.org/10.21605/cukurovaummfd.508894

Abstract

Inconel 625 nikel esaslı süper alaşım ile AISI 304 L ostenitik paslanmaz çelik farklı cins malzeme çifti, TIG (gas tungsten arc welding) yöntemi ile ErNiCr3 ilave metali kullanılarak birleştirilmiştir. Birbirinden değişik fiziksel ve kimyasal özelliklere sahip farklı cins malzeme çifti yüksek nikel içeriğine sahip ilave metalle birleştirilmiş ve bağlantının kaynak metali (KM) mikroyapı, sertlik ve tokluk özelikleri incelenmiştir. Kaynak metalinde ve ergime sınırında (ES) meydana gelen mikroyapısal dönüşümler ve intermetalik fazlar karakterize edilmiştir. Ana malzemelerin ve ilave metalin içerdiği elementlerin oranlarına bağlı olarak meydana gelen mikroyapısal dönüşümler, kaynak metali ve ITAB (Isı Etkisi Altındaki Bölge) açısından incelenmiştir. Seyrelme miktarına bağlı olarak kaynak metali ve ITAB kimyasal içerik farklılığı SEM/EDS (Taramalı elektron Mikroskobu/Enerji Dağılımlı Spektrometre) yardımı haritalama işlemi ile saptanmıştır. Elde edilen kaynak metali düşük sıcaklıklarda yüksek tokluk özelliklerine sahiptir. Kaynak metali kimyasal içeriği seyrelme nedeniyle elementel değişimlere maruz kalmıştır.

Keywords

Inconel 625, AISI 304L paslanmaz çelik, Mikroyapı, Sertlik, Tokluk

Joining of Inconel 625 and AISI 304L Dissimilar Material Pairs using High-Nickel Content Filler Metal: Microstructural and Mechanical Properties

Abstract

In this study, a couple of Inconel 625 nickel based super alloy and AISI 304 L austenitic stainless steel dissimilar materials were welded by TIG (gas tungsten arc welding) method using ErNiCr3 filler metal. A couple of dissimilar materials with different physical and chemical properties are joined with a high nickel content filler metal, and the weld metal microstructure, hardness and toughness properties of the weld are investigated. Microstructural transformations and intermetallic phases in the weld metal and at the melting boundary and precipitates formed in the structure have been characterized. Microstructural changes, which depend on the chemical composition of base metal are examined both in terms of weld metal and HAZ (Heat Affected Zone). Depending on the dilution amount, the difference in weld metal and HAZ chemical concentration was determined by SEM / EDS (Scanning Electron Microscopy/Energy Dispersive Spectroscopy) assistance mapping process. The obtained weld metal has high toughness properties at low temperatures. The chemical content of weld metal has exposed to partial elemental changes due to dilution. 

Keywords

Inconel 625, AISI 304L stainless steel, Microstructure, Hardness, Toughness

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