Effect of Nitrogen on the Mechanical Properties of Weld Metal of 316L Austenitic Stainless Steel

Deng, Baozhu

doi:10.3901/jme.2011.18.066

Cited by 4 publications

(1 citation statement)

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“…It increased the austenite content, while the hardness of ferrite was generally lower than that of austenite, resulting in decrease of the average hardness of the weld structure. Relevant research [17] shows that δ ferrite in the weld can effectively hinder the growth of the austenite structure during the weld solidification process. It has a strong effect on nucleation, which helps to refine the second sub-austenite.…”

Section: Indentation Curve Analysismentioning

confidence: 99%

Effect of Shielding Gas on the Microstructure and Properties of Laser-MAG Hybrid Welded Joint for Nickel-Saving Stainless Steel

Fang

Huang

Wang

et al. 2022

Advances in Materials Science and Engineering

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Laser-MAG (metal active gas) hybrid welding of nickel-saving 08Cr19Mn6Ni3Cu2N stainless steel was carried out by using 98%Ar + 2%N2 and 95%Ar + 5%CO2 as shielding gases. The effect of different shielding gases on the microstructure and properties of the welded joints was investigated. The results showed that arc shrinkage was significant with the addition of nitrogen, weld spatter increased with the expansion of arc volume, and arc stability deteriorated. The ferrite content in the weld decreased by about 60%, the ferrite dendrite also gradually became finer, and the secondary dendrite arm was shorter. Only a small amount of δ and γ phases existed in the weld, and no precipitation of the σ phase and nitride was found. Observing four crystal planes, we found that size of the austenite grains decreased with the addition of nitrogen. The average tensile strength of the welded joints decreased from 712 MPa to 704 MPa, but with improved corrosion resistance, the pitting corrosion rate increased from 19.45 g·m2/h to 18.72 g·m2/h, and the hardness of weld was slightly reduced.

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Section: Indentation Curve Analysismentioning

confidence: 99%