期刊
SURFACE & COATINGS TECHNOLOGY
卷 435, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128245
关键词
Cladding; Inconel 625; Cold metal transfer; Tungsten inert gas; Microstructure; Corrosion
资金
- National Natural Science Foundation of China [52001264, 52174007]
- Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance
Microstructure and corrosion behavior of cold metal transfer (CMT) and tungsten inert gas (TIG) cladding were compared. The CMT cladding showed a strong texture and generally had better corrosion resistance than the TIG cladding, although it had a higher pitting tendency adjacent to the fusion boundary.
Microstructure and corrosion behavior of cold metal transfer (CMT) and tungsten inert gas (TIG) cladding were compared by characterization, electrochemical measurements and exposure tests. Microstructure characterization indicates the difference in kernel average misorientation and microhardness between CMT and TIG claddings is negligible. However, the CMT cladding shows a strong texture at 001rolling direction (RD) while the strongest texture of TIG cladding is along <001>normal direction (ND) orientation. In addition, the percentage of Laves phase in the CMT cladding is generally lower than the TIG cladding. Electrochemical measurements and exposure tests indicate the corrosion resistance gradually increases with increasing of the distance to the fusion boundary of both claddings. The CMT cladding generally has better corrosion resistance than the TIG cladding. However, higher pitting tendency of the CMT cladding was observed adjacent to the fusion boundary likely due to the existence of large MC carbides.
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