Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material
Due to the higher production cost of the monolithic carbide tools as well as their brittle nature, cemented carbides such as WC-Co are frequently joined to tool steel. To overcome the joining complications that arise due to notable differences in thermal expansions between the components and the poo...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-06-01
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| Series: | Journal of Advanced Joining Processes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666330924000281 |
| _version_ | 1797271256686395392 |
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| author | Farzad Habibi Amir Mostafapour Karim Heydarpour |
| author_facet | Farzad Habibi Amir Mostafapour Karim Heydarpour |
| author_sort | Farzad Habibi |
| collection | DOAJ |
| description | Due to the higher production cost of the monolithic carbide tools as well as their brittle nature, cemented carbides such as WC-Co are frequently joined to tool steel. To overcome the joining complications that arise due to notable differences in thermal expansions between the components and the poor wettability, various investigators have used copper-based and silver-based filler metals to dissimilarly braze the cemented carbides to steels. However, researchers do not agree about the selection of filler material. This research investigates the use of pure copper, brass, and silver-based filler metals to join the WC-Co cemented carbide to AISI 1045 steel. In this regard, microstructural features and mechanical properties including microhardness and shear strength were studied. The results indicate the formation of Cu(Fe,Co) solid solution and η carbides at the joint interfaces as well as the development of various precipitated phases in the joint area comprising Fe-Zn and Co-Zn intermetallic compounds. The reaction layers at both sides of the joints accompanied by cobalt-depleted zone on the hard metal side were observed. While using the α−β brass interlayer, the increase in hardness of the joint area through the presence of (Cu,Zn) solid solution compared to pure copper, the joint shear strength was enhanced from 161 to 173 MPa. On the other hand, the utilization of silver-based filler alloy with a distribution of hard copper-rich solid solution phase (182 HV) embedded in a silver-rich ductile matrix (88 HV), presenting a dispersion hardening effect, improved the shear strength of the joint to 203 MPa. |
| first_indexed | 2024-03-07T13:59:11Z |
| format | Article |
| id | doaj.art-7085b926957b439cafe966e1b1f9819f |
| institution | Directory Open Access Journal |
| issn | 2666-3309 |
| language | English |
| last_indexed | 2024-03-07T13:59:11Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Advanced Joining Processes |
| spelling | doaj.art-7085b926957b439cafe966e1b1f9819f2024-03-07T05:30:16ZengElsevierJournal of Advanced Joining Processes2666-33092024-06-019100212Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler materialFarzad Habibi0Amir Mostafapour1Karim Heydarpour2Department of Materials Engineering, Sahand University of Technology, Tabriz, IranFaculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran; Corresponding author.Faculty of Mechanical Engineering, University of Tabriz, Tabriz, IranDue to the higher production cost of the monolithic carbide tools as well as their brittle nature, cemented carbides such as WC-Co are frequently joined to tool steel. To overcome the joining complications that arise due to notable differences in thermal expansions between the components and the poor wettability, various investigators have used copper-based and silver-based filler metals to dissimilarly braze the cemented carbides to steels. However, researchers do not agree about the selection of filler material. This research investigates the use of pure copper, brass, and silver-based filler metals to join the WC-Co cemented carbide to AISI 1045 steel. In this regard, microstructural features and mechanical properties including microhardness and shear strength were studied. The results indicate the formation of Cu(Fe,Co) solid solution and η carbides at the joint interfaces as well as the development of various precipitated phases in the joint area comprising Fe-Zn and Co-Zn intermetallic compounds. The reaction layers at both sides of the joints accompanied by cobalt-depleted zone on the hard metal side were observed. While using the α−β brass interlayer, the increase in hardness of the joint area through the presence of (Cu,Zn) solid solution compared to pure copper, the joint shear strength was enhanced from 161 to 173 MPa. On the other hand, the utilization of silver-based filler alloy with a distribution of hard copper-rich solid solution phase (182 HV) embedded in a silver-rich ductile matrix (88 HV), presenting a dispersion hardening effect, improved the shear strength of the joint to 203 MPa.http://www.sciencedirect.com/science/article/pii/S2666330924000281WC-Co brazingDissimilar joiningCopper interlayerBrass interlayerAg-based filler alloyDrilling and cutting tools |
| spellingShingle | Farzad Habibi Amir Mostafapour Karim Heydarpour Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material Journal of Advanced Joining Processes WC-Co brazing Dissimilar joining Copper interlayer Brass interlayer Ag-based filler alloy Drilling and cutting tools |
| title | Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material |
| title_full | Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material |
| title_fullStr | Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material |
| title_full_unstemmed | Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material |
| title_short | Microstructural evaluation and mechanical properties of WC-6%Co/AISI 1045 steel joints brazed by copper, brass, and Ag-based filler metals: Selection of the filler material |
| title_sort | microstructural evaluation and mechanical properties of wc 6 co aisi 1045 steel joints brazed by copper brass and ag based filler metals selection of the filler material |
| topic | WC-Co brazing Dissimilar joining Copper interlayer Brass interlayer Ag-based filler alloy Drilling and cutting tools |
| url | http://www.sciencedirect.com/science/article/pii/S2666330924000281 |
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