Excellent strength, joining effectiveness and low cost of brazing make it one of the most favoured methods for hard metals attachments. In this study, WC-Co, as a hard metal, was furnace-brazed by BAg1 (Ag–Cu–Zn–Cd) filler alloy and Ni-electroplated BAg1, and the influence of Ni-electroplating in joint properties was thoroughly studied. The brazing process was carried out using a tube furnace, at 670°C/15 min. The characteristics and microstructure of joints were studied by scanning electron microscope, energy-dispersive spectrometer and XRD. It was revealed that Ni coating of BAg1 represents 20% increase in wettability and approximately 15% increase in shear strength (from 107.98 to 124.17 MPa) by the formation of soft and semi-active NiZn phase and by the substitution of some of brittle TiC phase with NiTi phase.
LiuC, LinN, HeY, The effects of micron WC contents on the microstructure and mechanical properties of ultrafine WC–(micron WC–Co) cemented carbides. J Alloys Compd. 2014;594:76–81. doi: 10.1016/j.jallcom.2014.01.090
ZhangaY, GallowayaA, WoodaJ, Interfacial metallurgy study of brazed joints between tungsten and fusion related materials for divertor design. J Nucl Mater. 2014;454(1–3):207–216. doi: 10.1016/j.jnucmat.2014.07.058
4.
RodelasJ, HilmasG, MishraRS.Sinterbonding cobalt-cemented tungsten carbide to tungsten heavy alloys. Int J Refract Met Hard Mater. 2009;27(5):835–841. doi: 10.1016/j.ijrmhm.2009.03.001
5.
UpadhyayaGS.Cemented tungsten carbides; production, properties and testing. New York ( NY): Noyes Publications; 1998.
6.
JacobsonDM, HumpstonG.Principles of brazing. Materials Park ( OH): ASM International; 2005.
7.
SaeedAM, HussainZ, BadriA, The effects of welding parameters on the weldability of different materials using brazing alloy fillers. Mater Des. 2010;31(7):3339–3345. doi: 10.1016/j.matdes.2010.01.059
8.
MartensL, TillmannW, LugscheiderE, Strength and microstructure of brazed cemented carbide and silicon nitride joints. J Mater Process Technol. 1996;58(1):13–23. doi: 10.1016/0924-0136(95)02103-5
9.
YuH, SunY, Pamir AlpayS, Microstructure effects in braze joints formed between Ag/W electrical contacts and Sn-coated Cu using Cu-Ag-P filler metal. J Mater Sci. 2015;50(1):324–333. doi: 10.1007/s10853-014-8591-7
10.
NowackiJ, KawiakM.Microstructure and characteristics of high dimension brazed joints of cermets to steel. Manuf Eng. 2009;37(2):448–457.
11.
MirskiZ, PiwowarczykT.Wettability of hardmetal surfaces prepared for brazing with various methods. Arch Civ Mech Eng. 2011;11(2):411–419. doi: 10.1016/S1644-9665(12)60152-6
12.
Soltani TashiR, Akbari MousaviSAA, Mazar AtabakiM.Diffusion brazing of Ti-6Al-4V and austenitic stainless steel using Silver-based interlayer. Mater Des. 2014;54:161–167. doi: 10.1016/j.matdes.2013.07.103
13.
SisamouthL, HamdiM, ArigaT.Investigation of gap filling ability of Ag-Cu-In brazing filler metals. J Alloys Compd. 2010;504(2):325–329. doi: 10.1016/j.jallcom.2010.05.129
14.
SchwartzM.Brazing. 2nd ed.Materials Park ( OH): ASM International; 2003.
15.
AbedA, JalhamIS, HendryA.Wetting and reaction between β sialon, stainless steel and Cu–Ag brazing alloys containing Ti. J Eur Ceram Soc. 2001;21(3):283–290. doi: 10.1016/S0955-2219(00)00211-9
16.
ZhangL, FengJ, ZhangB, Ag–Cu–Zn alloy for brazing TiC cermet/steel. Mater Lett. 2005;59(1):110–113. doi: 10.1016/j.matlet.2004.08.029
17.
SongbaiX, YiyuQ, ZhenqingZ, Mechanism of interaction relation between rare-earth element Ce and impurity elements Pb and Bi in Ag-based filler metal. J Rare Earth. 2001;20(2):436–439.
18.
LaiZ, XueS, LuF, Effects of Ga and In on properties of cadmium-free Ag–Cu–Zn filler metal. China Weld. 2009;18(4):33–38.
19.
YangC, XuJ, DingW, Effect of cerium on microstructure, wetting and mechanical properties of Ag–Cu–Ti filler alloy. J Rare Earth. 2009;27(6):1051–1054. doi: 10.1016/S1002-0721(08)60387-7
20.
LiZ, JiaoN, FengJ, Effect of P and rare-earth La on microstructure and property of AgCuZnSn brazing alloy. Trans China Weld Inst. 2007;28(10):1–4.
21.
LiZ, JiaoN, FengJ, Effect of alloying elements on microstructure and property of AgCuZnSn brazing alloy. Trans China Weld Inst. 2008;29(3):65–68.
22.
ZhangJ, XiaoY, LuoG, Effect of Ni interlayer on strength and microstructure of diffusion-bonded Mo/Cu joints. Mater Lett. 2012;66(1):113–116. doi: 10.1016/j.matlet.2011.08.077
23.
VillarsP, PrinceA, OkamotoH.Handbook of ternary alloy phase diagrams. Materials Park ( OH): ASM International; 1995.
24.
FernandesCM, SenosAMR.Cemented carbide phase diagrams: a review. Int J Refract Met Hard Mater. 2011;29(4):405–418. doi: 10.1016/j.ijrmhm.2011.02.004
25.
WillinghamJ.Filler metals and fluxes for brazing tungsten carbide. Johnson Matthey Metal Joining brochure.
26.
ThorsenKA, FordsmandH, PraestgaardPL.An explanation of wettability problems when brazing Cemented Carbides. In: Fifteenth International AWS-WRC Brazing and Soldering Conference, TX, USA; 1984 Oct. p. 308–315.
27.
YajiangY, ZengdaZ, XiaoH, Microstructure and XRD analysis in the brazing zone of a new WC–TiC–Co hard alloy. Mater Res Bull. 2002;37(5):941–948. doi: 10.1016/S0025-5408(02)00694-3
28.
ZhongminL, SongbaiX, XianpengH, Study on microstructure and property of brazed joint of AgCuZn-X (Ga, Sn, In, Ni) brazing alloy. Rare Met Mater Eng. 2010;39(3):397–400. doi: 10.1016/S1875-5372(10)60087-2
29.
CaoJ, ZhangLX, WangHQ, Effect of silver content on microstructure and properties of brass/steel induction brazing joint using Ag–Cu–Zn–Sn filler metal. J Mater Sci Technol. 2011;27(4):377–381. doi: 10.1016/S1005-0302(11)60077-7
30.
ChenH, FengK, WeiS, Microstructure and properties of WC-Co/3Cr13 joints brazed using Ni-electroplated interlayer. Int J Refract Met Hard Mater. 2012;33:70–74. doi: 10.1016/j.ijrmhm.2012.02.018
31.
SusanaL, CampaciF, SantomasoAC.Wettability of mineral and metallic powders: applicability and limitations of sessile drop method and Washburn's technique. Powder Technol. 2012;226:68–77. doi: 10.1016/j.powtec.2012.04.016
32.
KumarG, PrabhuKN.Review of non-reactive and reactive wetting of liquids on surface. Adv Colloid Interface Sci. 2007;133(2):61–89. doi: 10.1016/j.cis.2007.04.009
33.
NaidichYV, ZhuravlevVS, GabII, Liquid metal wettability and advanced ceramic brazing. J Eur Ceram Soc. 2008;28(4):717–728. doi: 10.1016/j.jeurceramsoc.2007.07.021
34.
PalavraA, FernandesAJS, SerraC, Wettability studies of reactive brazing alloys on CVD diamond plates. Diamond Relat Mater. 2001;10(3–7):775–780. doi: 10.1016/S0925-9635(00)00397-6
35.
ChoiWK, LeeHM.Effect of Ni layer thickness and soldering time on intermetallic compound formation at the interface between molten Sn-3.5Ag and Ni/Cu substrate. J Electron Mater. 1999;28(11):1251–1255. doi: 10.1007/s11664-999-0164-1
36.
ZhuL, LuoL, LuoJ, Effect of electroless plating Ni–Cu–P layer on brazability of cemented carbide to steel. Surf Coatings Technol. 2011;206(8–9):2521– 2524. doi: 10.1016/j.surfcoat.2011.11.004
37.
HasanabadiM, ShamsipurA, SaniHN, Interfacial microstructure and mechanical properties of tungsten carbide brazed joints using Ag-Cu-Zn + Ni/Mn filler alloy. Trans. Nonferrous Met. Soc. China(in press).
38.
RoventiaG, CecchinibR, FabrizicA, Electrodeposition of nickel–zinc alloy coatings with high nickel content. Surf Coat Technol. 2015;276:1–7. doi: 10.1016/j.surfcoat.2015.06.043
39.
AhmadN, PrattJN.On the enthalpies and entropies of formation of solid nickel-zinc alloys. Thermochim Acta. 1981;45(2):139–151. doi: 10.1016/0040-6031(81)80139-6
40.
AkimovVV, AkimovMV, KorytovMS, Effect of porosity on elastic characteristics of TiC/TiNi hard alloys. J Appl Mech Tech Phy. 2009;50(4):658–660. doi: 10.1007/s10808-009-0088-9
41.
YeHZ, LiuR, LiDY, Development of a new wear-resistant material: TiC/TiNi composite. Scr Mater. 1999;41(10):1039–1045. doi: 10.1016/S1359-6462(99)00236-5
