Metal Oxide Nanoparticle-Based Coating as a Catalyzer for A-TIG Welding: Critical Raw Material Perspective

被引:12
作者
Balos, Sebastian [1 ]
Dramicanin, Miroslav [1 ]
Janjatovic, Petar [1 ]
Zabunov, Ivan [2 ]
Klobcar, Damjan [3 ]
Busic, Matija [4 ]
Grilli, Maria Luisa [5 ]
机构
[1] Univ Novi Sad, Fac Tech Sci, Trg Dositeja Obradov 6, Novi Sad 21000, Serbia
[2] Alexander Dubcek Univ Trencin, Fac Special Technol, Studentska 2, Trencin 91150, Slovakia
[3] Univ Ljubljana, Fac Mech Engn, Askerceva C 6, Ljubljana 1000, Slovenia
[4] Univ Zagreb, Fac Mech Engn & Naval Architecture, Ivana Lucica 5, Zagreb 10002, Croatia
[5] Italian Natl Agcy New Technol Energy & Sustainabl, Casaccia Res Ctr, Via Anguillarese 301, I-00123 Rome, Italy
关键词
oxide coating; nanoparticles; TIG welding; penetration depth; WEAR-RESISTANCE; ACTIVATING FLUX; PENETRATION; TIO2;
D O I
10.3390/met9050567
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Besides a wide application in corrosion protection, wear resistance increase, providing thermal properties and power conversion, oxide coatings have found an alternative application in welding technology as catalysts of the tungsten inert gas (TIG) welding process. In this paper, the novel approach of fabricating a coating containing nanoparticles based on nanosized SiO2 and TiO2 and their mixtures was applied to the austenitic stainless-steel base metal. It was found that coatings increased depths of penetration, enabling a consumable-free welding. Using this method, the use of several critical and near-critical raw materials (e.g., Si and Cr), as well as the relatively expensive Ni can be completely avoided. The most effective coating in terms of weld penetration consisted of a mixture of nanoparticles, rather than unary oxide coatings based on nanoparticles. A model for liquid weld metal flow is proposed based on the metallographic examination of recrystallized grains and microhardnesses measured near the weld metal, supporting the reversed Marangoni convection theory.
引用
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页数:12
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