Effects of Postweld Heat Treatment on Interfacial Behavior and Mechanical Properties of Joints Welded with Cu/Ni-Cr Alloy
Rattachement africain : cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Welded cable composed of nickel–chromium (Ni-Cr) alloy and copper is a crucial component in the resistance heating technology used for heavy oil production. Tungsten inert gas (TIG) welding was employed to join the copper and Ni-Cr alloy using copper filler wire, and the stability of the welded joint was analyzed under high-temperature service conditions. We examined the changes in the microstructure and properties of the welded joint after postweld heat treatment (PWHT) at 600 °C for 3, 6, and 12 days. The results showed that the welded joint was appropriately formed, with fractures occurring in the copper substrate. The average tensile strength of the welded joint was 240 MPa. The copper and nickel dissolved into each other, forming a Cu0.81Ni0.19 strengthening phase. A columnar crystal diffusion layer formed at the interface between the Ni-Cr alloy and the fusion zone after welding. Grain boundary migration promoted the continuous growth in the columnar crystals as the PWHT duration increased, eliminating the microdefects and inhomogeneities caused by welding. The microhardness progressively decreased from the Ni-Cr alloy side to the copper side. However, the nanoindentation results at the Ni-Cr fusion line initially decreased and then increased with increasing PWHT duration, which contrasted the overall hardness trend observed across the joint after PWHT.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Effects of Postweld Heat Treatment on Interfacial Behavior and Mechanical Properties of Joints Welded with Cu/Ni-Cr Alloy
- Date Crossref
- 18/11/2024
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
China National Petroleum Corporation (China) pays non établi dans la noticeEntreprise
-
Zhejiang University Zhejiang Key Laboratory of Advanced Solid State Energy Storage Technology and Applications pays non établi dans la noticeUniversité ou école supérieure
-
Taizhou University pays non établi dans la noticeUniversité ou école supérieure
-
Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals pays non établi dans la noticeUniversité ou école supérieure
-
Ltd. CNPC Baoji Petroleum Steel Pipe Co. pays non établi dans la noticeEntreprise
-
Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods pays non établi dans la noticeStructure de recherche
China National Petroleum Corporation (China), Zhejiang Key Laboratory of Advanced Solid State Energy Storage Technology and Applications — Zhejiang University et Taizhou University, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.