Nonmetallic Inclusions and Acicular Ferrite in Arc Welds of Pipeline Steels
نویسندگان
چکیده
منابع مشابه
Effect of Inclusions on Acicular Ferrite Formation in Submerged Arc Welding of API5L-X65
In the present study, effect of inclusions characteristics changing on the formation of acicular ferrite in submerged arc welding of API5l-X65 low alloy steel was investigated. Three different welding fluxes with different chemical composition and basicity index of 0.72, 0.82 and 0.99, and two different welding heat inputs of 1.6 kJ / mm and 2.4 kJ / mm were used to create inclusions with diffe...
متن کاملEffect of Inclusions on Acicular Ferrite Formation in Submerged Arc Welding of API5L-X65
In the present study, effect of inclusions characteristics changing on the formation of acicular ferrite in submerged arc welding of API5l-X65 low alloy steel was investigated. Three different welding fluxes with different chemical composition and basicity index of 0.72, 0.82 and 0.99, and two different welding heat inputs of 1.6 kJ / mm and 2.4 kJ / mm were used to create inclusions with diffe...
متن کاملEffect of Nonmetallic Inclusions on Steel Welds Metal Hot Cracking
B. Z orc, W elding I nstitute, L jubljana, S lovenia; M . I mamović, Un iversity of Zenica, Faculty of Mechanical Engineering, Zenica, B a nd H; A. Nagode, B. Kosec, L. Kosec, University of Ljubljana, Faculty of Natural Sciences and Engineering, Ljubljana, Slovenia; A. Stoić, I. Samardžić, University of Osijek, Mechanical Engineering Faculty, Slavonski Brod, Croatia Intercrystally distributed n...
متن کاملThe Discovery of Lower Acicular Ferrite
There is general agreement that a weld microstructure primarily containing acicular ferrite will exhibit high strength and excellent toughness due to its small grain size, high dislocation density, and the way in which the plates are dispersed in the microstructure (Pargeter, 1983; Sneider and Ken, 1984). In contrast, the presence of allotriomorphic ferrite, ferrite plates with aligned carbides...
متن کاملEffect of Acicular Ferrite on Cracking Sensibility in the Weld Metal of Q690+Q550 High Strength Steels
High strength steels Q690+Q550 were welded using three different welding wires without preheating by gas shielded arc welding process. Microstructural characteristics of weld metals and nucleation mechanism of acicular ferrite were investigated by means of scanning electron microscope (SEM), energy dispersive spectrum (EDS) and transmission electron microscope (TEM). The straight Y-groove test ...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2015
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927615009526