Parametric Optimisation of Pulsed – Tig Welding Process in Butt Joining of 304l Austenitic Stainless Steel Sheets

., Dinesh Kumar.R

doi:10.15623/ijret.2014.0323047

Cited by 6 publications

(3 citation statements)

References 15 publications

(4 reference statements)

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“…Ne kep eğme testleri sırasında ne de kök eğme testleri sırasında herhangi bir çatlama ya da kırılma gözlenmemiştir. Kumar ve diğerleri, TIG kaynağı ile AISI 304 paslanmaz çeliğini birleştirdikleri ve birleştirmelere üç nokta eğme testi uyguladıkları çalışmada herhangi bir açılma ya da çatlak oluşumuna rastlanmadığını rapor etmişlerdir [38]. Kar ve diğ.…”

Section: Eğme Deneyi Sonuçlarıunclassified

The effects of TIG welding parameters on the microstructure and mechanical properties of AISI 316L stainless steel

YÜRÜK¹

2023

Pamukkale J Eng Sci

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Bu çalışmada yüksek korozyon direnci nedeni ile nükleer güç santrallerinde yaygın bir şekilde kullanılan AISI 316L östenitik paslanmaz çelik, TIG kaynak yöntemi ile farklı kaynak akımlarında ve kaynak hızlarında, ilave tel kullanılmadan birleştirilmiştir. Daha sonra üretilen kaynaklı birleştirmelerin ısı girdileri hesaplanarak, numunelere makro ve mikroyapı çalışmaları, sertlik, çekme ve eğme testleri uygulanmıştır. Mikroyapı çalışmaları sonucunda kaynak metalinin östenit+çatısal ferrit ya da delta ferritten oluşan bir mikroyapıya sahip olduğu görülmüştür. Sertlik deneyleri sonucunda kaynak akımının artması ile sertliğin düştüğü gözlenirken kaynak hızının artması ile de sertliğin yükseldiği belirlenmiştir. Çekme deneyleri sonuçları ise sertlik ölçümleri ile benzerlik göstererek kaynak akımının artması ile çekme dayanımı düşerken kaynak hızının artması ile çekme dayanımı artmıştır. Yapılan 180 0 eğme testlerinde ise ne kep eğmelerinde ne de kök eğmelerinde herhangi bir yırtılma ya da çatlamaya rastlanmamıştır.In this study, AISI 316L austenitic stainless steel, which is widely used in nuclear power plants due to its high corrosion resistance, is joined by TIG welding method at different welding currents and welding speeds without using additional wire. Then, the heat inputs of the produced welded joints were calculated and macro and microstructure studies, hardness, tensile and bending tests were applied to the samples. As a result of the microstructure studies, it has been observed that the weld metal has a microstructure consisting of austenite + Skeletal ferrite or delta ferrite. As a result of the hardness tests, it was observed that the hardness decreased with the increase of the welding current, and the hardness increased with the increase of the welding speed. As a result of the tensile tests, similar to the hardness measurements, the tensile strength decreased with the increase of the welding current, while the tensile strength increased with the increase in the welding speed. No tearing or cracking was observed in either the cap twists or the root bends in the 180 0 bending tests.

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Section: Eğme Deneyi Sonuçlarıunclassified

The effects of TIG welding parameters on the microstructure and mechanical properties of AISI 316L stainless steel

YÜRÜK¹

2023

Pamukkale J Eng Sci

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“…Так же известно, что моноксид углерода, нагретый выше определенной температуры, вступает в активные химические реакции с кислородом воздуха, окисляясь до углекислого газа [5]. Поэтому с целью нейтрализации вредного действия монооксида углерода было предложено нагревать подогреваемый для защиты сварочной дуги газ выше температуры воспламенения [6].…”

Section: использование восстановительной атмосферы для сварки сталей аустенитного классаunclassified

Использование Восстановительной Атмосферыдля Сваркисталей Аустенитного Класса

Иванайский¹,

Ишков²,

Иванайский³

et al. 2019

Ползуновский Вестник

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В работе описаны основные металлургические реакции, протекающие при сварке сталей аустенитного класса. Предложены пути предотвращения окисления легирующих элементов. Установлено, что использование восстановительных атмосфер предотвращает окисление металла шва при дуговой сварке сталей типа 08Х18Н10. Показано, что выгорание легирующих элементов в столбе дуги и сварочной ванне в среде монооксида углерода не происходит. Установлено, что при сварке в среде моноксида углерода сформировался качественный сварной шов, без пор, микротрещин и других дефектов. Выполненные механические испытания и испытания на коррозионную стойкость подтвердили качество получаемых сварных соединений. Металлографические исследования показали, что в металле шва, наплавленном в среде монооксида углерода, было отмечено формирование вторичных границ, не совпадающих с направлением роста дендритов. В результате проведенных исследований было доказано, что при использовании СО в качестве защитной атмосферы при сварке стали 08Х18Н10, химический состав металла шва близок к составу металла шва, выполненного при аргонодуговой сварке. Выполненные исследования показывают возможность применения монооксида углерода в качестве дешевой альтернативы широко используемым в настоящее время инертным газам.

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“…They found that there were large thermal stresses arising in these joints during temperature fluctuations owing to the difference in thermal expansion coefficients. Dinesh Kumar et al [13] investigated the effect of different parameters including current, voltage, stand-off distance, weld speed and gas flow to improve welding quality. They found that weld speed and input current were the most significant parameters.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Stand - Off Distance on the Mechanical Properties of TIG Butt Joints of 316 Stainless Steel

Gnedi

Snoussi

Taher

et al. 2020

KEM

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The objective of this study is to investigate and determine the effect of the stand-off distance (distance between the welded plates) on the mechanical properties of the Tungsten Inert Gas (TIG) welded joints. Butt TIG welding was performed for 316 stainless steel (SS) by using different pre welding stand-off distances with fixing the other parameters (thickness of welded plates, voltage, current, groove shape, and scanning speed). The influence of the stand-off distance parameter was examined by using tensile test, hardness test in the three different regions (base metal, heat effected zone, and molten zone), non-destructive testing (including visual inspection, liquid pentrant and X – ray) and microscopic examinations. Results show that the stand-off distance is one of the most important geometrical parameters of the Butt welded joints to end by good mechanical properties. It is found that the optimum stand-off distance was about 1 mm (shows the highest hardness results), but still there were some defects in some spots in the molten metal zone which caused a decrease in the hardness values in these locations. The 2 mm stand-off distance shows reasonable results, and the worst case was recorded for the 0 mm stand-off distance condition. Generally the hardness values of the heat affected zone in all conditions were the highest when compared to both metal welding zone and the base metal zone.

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Parametric Optimisation of Pulsed – Tig Welding Process in Butt Joining of 304l Austenitic Stainless Steel Sheets

Abstract: Abstract

Cited by 6 publications

References 15 publications

The effects of TIG welding parameters on the microstructure and mechanical properties of AISI 316L stainless steel

The effects of TIG welding parameters on the microstructure and mechanical properties of AISI 316L stainless steel

Использование Восстановительной Атмосферыдля Сваркисталей Аустенитного Класса

The Effect of Stand - Off Distance on the Mechanical Properties of TIG Butt Joints of 316 Stainless Steel

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