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通过工艺参数优化维持 GTAW 双相不锈钢接头中的奥氏体/铁素体比例平衡

Maintenance of the Austenite/Ferrite Ratio Balance in GTAW DSS Joints Through Process Parameters Optimization.

作者信息

Rodriguez Bryan R, Miranda Argelia, Gonzalez David, Praga Rolando, Hurtado Eduardo

机构信息

Corporacion Mexicana de Investigacion en Materiales S.A. de C.V., Ciencia y Tecnologia No. 790, Saltillo 400, 25290 Saltillo, Coahuila, Mexico.

Universidad Autonoma de Coahuila, Facultad de Sistemas, Ciudad Universitaria, Carretera a Mexico Km 13, 25380 Arteaga, Coah., Mexico.

出版信息

Materials (Basel). 2020 Feb 8;13(3):780. doi: 10.3390/ma13030780.

DOI:10.3390/ma13030780
PMID:32046295
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7040704/
Abstract

The present work describes the influence of the parameters employed in the gas tungsten arc welding process (GTAW) when nickel powder is used as a filler metal in 2304/2507 duplex stainless-steel dissimilar joints. Multi-objective optimization was applied in order to maintain the austenite/ferrite percentage in the welded zone. A microstructural and phase quantification analysis was performed in each sample through optical and scanning electron microscopes. It was found that a nickel powder addition combined with low heat input increased the biphasic ratio across the different zones of the dissimilar welded samples. Although the austenite volume fraction increased in the 2304 heat-affected zone (HAZ) near to 25%, it was not sufficient according to international standards. The obtained results led to the maintenance of the 50/50 phase percentage in the 2507 HAZ welded joint side, as well as to the increment of the austenite percentage in the 2304 HAZ.

摘要

本研究描述了在2304/2507双相不锈钢异种接头中使用镍粉作为填充金属时，钨极气体保护电弧焊（GTAW）工艺中所采用参数的影响。为了维持焊接区的奥氏体/铁素体百分比，进行了多目标优化。通过光学显微镜和扫描电子显微镜对每个样品进行了微观结构和相定量分析。结果发现，添加镍粉并结合低热量输入，增加了异种焊接样品不同区域的双相比例。尽管在靠近25%的2304热影响区（HAZ）中奥氏体体积分数有所增加，但根据国际标准仍不充足。所得结果使得在2507 HAZ焊接接头一侧维持了50/50的相百分比，同时也使2304 HAZ中的奥氏体百分比有所增加。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/a2294acdcf24/materials-13-00780-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/cc71f9e3619f/materials-13-00780-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/06736af94a03/materials-13-00780-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/dfd246e003b9/materials-13-00780-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/bb380e649987/materials-13-00780-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/a2294acdcf24/materials-13-00780-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/b2630c9acb05/materials-13-00780-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/793e0d6d37ae/materials-13-00780-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/77ab37d448c6/materials-13-00780-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/42191802a5f6/materials-13-00780-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/56529d41ff0d/materials-13-00780-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/76bfc43b3386/materials-13-00780-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/cc71f9e3619f/materials-13-00780-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/06736af94a03/materials-13-00780-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/dfd246e003b9/materials-13-00780-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/bb380e649987/materials-13-00780-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/3c6b3a7f2e39/materials-13-00780-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/6d0495fe2569/materials-13-00780-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a5cd/7040704/a2294acdcf24/materials-13-00780-g013.jpg

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