Research on Surface Coating Treatment of Casting Die for Copper Alloy Water-Meter Shell
Tóm tắt
In the production process of copper alloy metal mold casting, the surface of the mold cavity must bear the effects of erosion wear and thermal stress of high-temperature liquid metal, resulting in fatigue cracks and erosion corrosion on the mold surface, which seriously affects the service life of the mold. To address the problems of short mold life and poor surface quality of castings in the casting process of copper alloy water-meter shell, a new type of mold surface treatment coating was developed. The effects of refractory filler, suspending agent and binder on the properties of suspensibility, viscosity, adhesion, wear resistance, drying crack resistance and demolding performance of the coating were studied by single factor and orthogonal test. The formula of water meter-shell copper mold coating was optimized and verified in the production practice. The results show that when talc powder is 55wt%, mica powder is 30wt%, boron nitride is 15 wt%, sodium bentonite is 6wt%, sodium carboxymethyl cellulose is 0.5wt%, sodium silicate is 10wt%, sodium hexametaphosphate is 1.2wt%, and solid-to-liquid ratio is 1:2, the coating has high bonding strength with the mold surface, and the coating does not fall off, which can better protect the mold surface from the erosion and wear of the alloy melt, and effectively improve the service life of the mold and the quality of the casting.
Tài liệu tham khảo
Z. Li, K.X. Song, Introduction of “special topics on copper and copper alloy.” Chin. J. Nonferrous Metals 31(5), 1423–1426 (2021). (in Chinese)
Y.X. Jiang, H.F. Lou, H.F. Xie et al., Development status and prospects of advanced copper alloy. Study. CAE 22(5), 84–92 (2020). (in Chinese)
V. Joshi, A. Srivastava, R. Shivpuri, Intermetallic formation and its relation to interface mass loss and tribology in die casting dies. Wear 256(11), 1232–1235 (2004)
Y. Motoyama, H. Shiga, T. Sato et al., Elasto-plastic-creep constitutive equation of An Al-Si-Cu high-pressure die casting alloy for thermal stress analysis. Metall. Mater. Trans. A. 47A(11), 5598–5608 (2016)
D. Klobčar, L. Kosec, B. Kosec et al., Thermo fatigue cracking of die casting dies. Eng. Fail. Anal. 20, 43–53 (2020)
M.L. Zhu, J. Long, F.Z. Xuan, Fatigue life and mechanistic modeling of interior micro-defect induced cracking in high cycle and very high cycle regimes. Acta Mater. 157, 259–275 (2018)
M.A.M. Page, B. Weidenfeller, S. Hartmann, Influence of temperature and aging on the thermal diffusivity, thermal conductivity and heat capacity of a Zinc Die casting alloy. J. Alloy. Compd. 786, 1060–1067 (2019)
Z.X. Yang, A.H. Wang, Z.K. Weng et al., Porosity elimination and heat treatment of diode laser-clad homogeneous coating on cast Aluminum-Copper alloy. Surf. Coat. Technol. 321(2), 26–35 (2017)
F.W. Bach, K. Möhwald, Y. Zhang et al., Transplantation of thermally sprayed wear-resistant coatings by high pressure die casting of light metals. Materialwiss. Werkstofftech. 41(6), 442–449 (2010)
K. Bobzin, T. Brögelmann, R.H. Brugnara et al., Crn/Aln and Crn/Aln/Al2o3 Coatings Deposited by Pulsed Cathodic Arc For Aluminum Die casting applications. Surf. Coat. Technol. 284, 222–229 (2015)
R. Cottam, T. Barry, D. McDonald et al., Laser processing of Nickel-Aluminum Bronze for improved surface corrosion properties. J. Laser Appl. 25(3), 1–7 (2013)
Y. Xu, Cast iron Metal Mold Casting (Tongji. University. Press, Shanghai, 1993). ((in Chinese))
T. Hanano, Method for low pressure die casting with low pressure die casting powdery mold releasing agent (US, US, 1994), p. 5277831
S.I. Borovik, T.N. Ivanova, N.L. Mironenko et al., Protective coatings as a means of improving heat resistance of the refractory lining for extra-furnace steelmaking facilities. Refract. Ind. Ceram 46(1), 24–26 (2005)
Y.C. Li, J.P. Wang, Y. Liu, Study of Mold (core) coating in application. Foundry. Eng 30(1), 1–5 (2006). ((in Chinese))
Z.M. Liu, W.J. Zhang, Y. Liu et al., Study on new adiabatic composite coating for Metal Mold. Foundry 62(3), 203–205 (2013). (in Chinese)
M Laudenklos 2012 Mold-Release layer for use in the casting of Nonferrous. Metals. US, US 8205659 B2
M Engler K Uibel 2012 Size for production of a BN-containing coating method for production thereof coated body production and use there of US, US 8128864
Y. Akbarzadeh, M. Rezaei, A.A. Babaluo et al., Microstructure, permeability and rheological behavior of lost foam refractory coatings. Surf. Coat. Technol. 202(19), 4636–4643 (2008)
M. Karimian, A. Ourdjini, M.H. Idris et al., Effect of pattern coating thickness on characteristics of lost foam Al–Si–Cu alloy casting. Trans. Nonferrous. Metals. Soc. China 22(9), 2092–2097 (2012)
B. Podgornik, T. Kosec, A. Kocijan et al., Tribological behaviour and lubrication performance of Hexagonal Boron Nitride (H-Bn) as a replacement for Graphite in Aluminium forming. Tribol. Int. 81, 267–275 (2015)
B. Podgornik, F. Kafexhiu, T. Kosec et al., Friction and anti-galling properties of Hexagonal Boron Nitride (H-Bn) in Aluminium Forming. Wear 388–389, 2–8 (2017)
K.K. Zheng, Y.X. Lin, W.P. Chen et al., Numerical simulation and optimization of casting process of copper alloy water-meter shell. Adv. Mech. Eng. 12(5), 1687–8140 (2020)
B. Li, X.F. Jiang, Y.P. Wu et al., Novel environmental-friendly lubricating materials: water-based pai-graphite-laf3 bonded solid lubricating coatings. Appl. Surf. Sci. 481, 900–909 (2019)
J. Ding, Research on the thermal decomposition behaviors and the thermal residue of Mica—Glass Frits/Bpf composite material. Wuhan. University. Technol 91(6), 1373–1379 (2013). (in Chinese)
W.G. Lin, Research on frictional behavior of Cu-BN composite. Beijing. Jiaotong. University 101(4), 8697–8715 (2012). (in Chinese)
Y.C. Li, Foundry coatings and applications. Foundry. Technol 41(12), 1143–1196 (2020). (in Chinese)
F. Yang, Research of the multifunctional ceramic coatings on the surface of Aluminum alloys. Huazhong. University. Sci. Technol 58(14), 1532–1555 (2012). (in Chinese)
H.S. Xiao, Inspective methods of Dacromet treatment. Electropl. Finish 23(1), 45–48 (2004). (in Chinese)
X.J. Zhang, Study on the insulating and suppercooling coating of casting Aluminum alloy. Harbin. Ins. Technol 64(4), 737–745 (2008). (in Chinese)
P. Gao, X.X. Xue, Effect of Mica powder content on properties of Epoxy Acrylate composite coating. Mater. Protec 44(3), 47–49 (2011)
L. Zhang, Y.X. Wang, L.M. Peng et al., Study on rheological characteristics of permanent mold coating for Magnesium alloys. Foundry 58(10), 1041–1044 (2009)
H.F. Yu, Study on Metal Mold Casting Coating for Magnesium Alloy. Shenyang. Ligong. University 11, 2–22 (2014). (in Chinese)
J.J. Li, J. Qiu, X.J. Lv, Research of the application of Bentonite in coating. China. Non-Metal. Min. Industry. Herald 4, 15–17 (2006). (in Chinese)
G.S. Gou, H.F. Yu, C.Y. Dong, Effects of Hexametaphosphate on the metal mold coating for Magnesium alloys. Spec. Cast. Nonferrous. Alloys 34(3), 240–242 (2014)