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| Microstructure and wear mechanism of laser cladding AlCoCrFeNiTi0.5 coating |
| ZHOU Hao1, LI Zhuan1, ZHAO Yibo2,3, HU Chun1 |
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Yuelushan Laboratory, Changsha 410128, China;
3. Hunan Agricultural Equipment Research Institute, Changsha 410125, China |
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Abstract Soil-engaging components of agricultural machinery commonly suffer from wear failure and short service life under complex service conditions in sandy abrasive soil. Depositing a wear-resistant coating on their surfaces can effectively enhance the surface hardness and prolong the service life of the components. In this study, an AlCoCrFeNiTi0.5 coating was fabricated on the surface of 30MnB5 steel via laser cladding technology. The effects of annealing treatment on the phase composition, microstructure, hardness and wear performance of the coating were systematically investigated. Combined with the laboratory wet sand rubber wheel wear test and annular soil trough-accelerated wear bench test, the wear mechanism and performance regulation mechanism of the coating were revealed. The results show that the as-deposited AlCoCrFeNiTi0.5 coating possesses a dual-phase solid solution structure composed of FCC and BCC phases. After annealing treatment, Laves and σ phases precipitate in the coating, and the microstructure transforms from coarse petal-like morphology to uniform and fine worm-like structure. The average microhardness (HV0.5) of the annealed coating reaches 770.7, which is 10.3% higher than that of the as-deposited coating. The annealing treatment can significantly optimize the wear resistance of the coating. There are only slight ploughing marks on the worn surface, which effectively inhibit the micro-cutting and plastic deformation dominated by abrasive wear. At the same time, the coating can significantly reduce the wear failure of the rotary blade, and the wear degree of the coating is gradiently distributed along the cutting edge of the rotary blade. This study provides a systematic theoretical basis and technical reference for the design and engineering application of high-wear-resistant high-entropy alloy coatings for soil-engaging components of agricultural machinery.
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Received: 25 March 2026
Published: 08 September 2026
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[1] WANG Y, LI D, NIE C, et al.Research progress on the wear resistance of key components in agricultural machinery[J]. Materials, 2023, 16(24): 7646-7665.
[2] SAKAMOTO T, MATSUGI K, OCHI Y, et al.Improvement of impact properties at low temperatures by statically heat treatment for 0.13C-0.45Si-0.7Mn-0.5Mo-0.1Cr low alloyed cast steel[J]. Materials Transactions, 2025, 66(4): 444-449.
[3] SHIN S H, OH D K, HWANG B.Influence of heat treatment on microstructure and mechanical properties of direct- quenched Fe-0.06C-0.2Si-2.0Mn steel[J]. Metals, 2023, 13(12): 1912.
[4] PALANI P K, MURUGAN N.Optimization of weld bead geometry for stainless steel claddings deposited by FCAW[J]. Journal of Materials Processing Technology, 2007, 190(1/2/3): 291-299.
[5] ZHANG L M, SUN D B, YU H Y, et al.Characteristics of Fe-based alloy coating produced by plasma cladding process[J]. Materials Science and Engineering A, 2007, 457(1/2): 319-324.
[6] LI M X, WEI W, ZHAO Y B, et al.Fabrication and characterization of ceramic WC10Co4Cr-YSZ composite coating via HVOF spraying core-shell powders[J]. Ceramics International, 2025, 51(14): 19058-19070.
[7] NIE H Y, LI Z, ZHOU H, et al.Study on the wear resistance and mechanism of HVOF-sprayed WC10Co4Cr coatings[J]. Surface and Coatings Technology, 2024, 494: 131368.
[8] HAFEEZ M A.Microstructural and mechanical properties of one-step quenched and partitioned 65Mn steel[J]. Arabian Journal for Science and Engineering, 2021, 46(3): 2261-2267.
[9] SHARMA M, ORTLEPP I, BLECK W.Boron in Heat- treatable steels: a review[J]. Steel Research International, 2019, 90(11): 1900133.
[10] KISHORE K, JAISWAL N, PRABHAKARAN A, et al.Through-thickness microstructure and wear resistance of plasma transferred arc Stellite 6 cladding: effect of substrate[J]. CIRP Journal of Manufacturing Science and Technology, 2023, 42: 24-35.
[11] GHADAMI F, AGHDAM A S R. Improvement of high velocity oxy-fuel spray coatings by thermal post-treatments: a critical review[J]. Thin Solid Films, 2019, 678: 42-52.
[12] MEHTA A, VASUDEV H.Advancements in ceramic-coated metals: enhancing thermal spray coatings for improved performance in aerospace applications using surface treatments[J]. Results in Surfaces and Interfaces, 2025, 18: 100387.
[13] 李佳佳, 刘丽兰, 王甲一, 等. P550无磁钢表面激光熔覆57%WC增强镍基涂层的气孔抑制工艺[J]. 粉末冶金材料科学与工程, 2025, 30(6): 490-501.
LI Jiajia, LIU Lilan, WANG Jiayi, et al.Porosity suppression process of laser cladding nickel-based coatings reinforced with 57%WC on P550 non-magnetic steel[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(6): 490-501.
[14] LI W J, GUO W M, ZHANG H L, et al.Influence of Mo on the microstructure and corrosion behavior of laser cladding FeCoCrNi high-entropy alloy coatings[J]. Entropy, 2022, 24(4): 539.
[15] WANG K M, LIU W, HONG Y X, et al.An overview of technological parameter optimization in the case of laser cladding[J]. Coatings, 2023, 13(3): 496.
[16] ZHU L D, XUE P S, LAN Q, et al.Recent research and development status of laser cladding: a review[J]. Optics & Laser Technology, 2021, 138: 106915.
[17] 卢盛儒, 仝永刚, 胡永乐, 等. TiC含量对激光熔覆Inconel 718复合涂层组织和性能的影响[J]. 粉末冶金材料科学与工程, 2025, 30(1): 11-21.
LU Shengru, TONG Yonggang, HU Yongle, et al.Effects of TiC content on microstructures and properties of laser cladding Inconel 718 composite coatings[J]. Materials Science and Engineering of Powder Metallurgy, 2025, 30(1): 11-21.
[18] JIN T T, SHI Y S, DING J W, et al.Laser cladding of diamond reinforced composite coatings on the rotary tiller blade with complex curved surface: cladding paths and residual stress[J]. Surface and Coatings Technology, 2025, 516: 132734-132748.
[19] LIU C, WANG C L, LIANG M C, et al.Preparation of WMoCrNiTi high-entropy alloy coating by plasma diffusion on titanium alloy surface[J]. Journal of Alloys and Compounds, 2025, 1029: 180744.
[20] XIE Y J, WEN X, YAN J K, et al.Microstructure and wear resistance of AlCoCrFeNiCuSnX high-entropy alloy coatings by plasma cladding[J]. Vacuum, 2023, 214: 112176.
[21] YUE K, WANG L, XU Z, et al.Effect of WC content on the microstructure and wear resistance of laser cladding AlCoCrFeNiTi0.5 high-entropy alloy coatings[J]. Ceramics International, 2024, 50(21): 41515-41526.
[22] GUO Y F, YANG F, LU B W, et al.Competitive relationship between the FCC+BCC dual phases in the wear mechanism of laser cladding FeCoCrNiAl0.5Ti0.5 HEAs coating[J]. Surface and Coatings Technology, 2024, 493: 131315.
[23] ALIZADEH M, BAKHSHI S R, DEHNAVI M R, et al.Titanium-induced phase changes and tribological behavior in cantor-based high entropy alloys[J]. Scientific Reports, 2026, 16(1): 9246-9263.
[24] ARUN S, RADHIKA N, SALEH B.Effect of additional alloying elements on microstructure and properties of AlCoCrFeNi high entropy alloy system: a comprehensive review[J]. Metals and Materials International, 2025, 31(2): 285-324.
[25] XU Z, LI D Y, CHEN D L.Effect of Ti on the wear behavior of AlCoCrFeNi high-entropy alloy during unidirectional and bi-directional sliding wear processes[J]. Wear, 2021, 476: 203650.
[26] GAO S, ZHOU B W, LIU Y F, et al.Effect of heat treatment on mechanical properties, wear and corrosion resistance of HVAF sprayed FeCoNiCrMo high-entropy alloy coating[J]. Materials Characterization, 2025, 226: 115199.
[27] WANG X W, HUANG B S, LI T N, et al.Effect of heat treatment on microstructure and properties of CrMnFeCoNiMo high entropy alloy coating[J]. Journal of Materials Research and Technology, 2024, 29: 311-322.
[28] GUO W H, LI J Y, QI M F, et al.Effects of heat treatment on the microstructure, mechanical properties and corrosion resistance of AlCoCrFeNiTi0.5 high-entropy alloy[J]. Journal of Alloys and Compounds, 2021, 884: 161026.
[29] KONG D, GUO J, LIU R W, et al.Effect of remelting and annealing on the wear resistance of AlCoCrFeNiTi0.5 high entropy alloys[J]. Intermetallics, 2019, 114: 106560.
[30] ZHAO Y, WANG M L, CUI H Z, et al.Effects of Ti-to-Al ratios on the phases, microstructures, mechanical properties, and corrosion resistance of Al2-xCoCrFeNiTix high-entropy alloys[J]. Journal of Alloys and Compounds, 2019, 805: 585-596.
[31] ZHANG K B, FU Z Y, ZHANG J Y, et al.Microstructure and mechanical properties of CoCrFeNiTiAlx high-entropy alloys[J]. Materials Science and Engineering A, 2009, 508(1/2): 214-219.
[32] TAKEUCHI A, INOUE A.Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element[J]. Materials Transactions, 2005, 46(12): 2817-2829. |
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2026, Vol. 31 
