Effect of La2O3 addition on wear properties of Ni60a/SiC coating using laser-cladding

Shi, Yameng; Li, Jingbin; Zhang, Jie; Wen, Bo; Li, liqiao; Wang, Xianfei; Ren, Sixue

doi:10.1016/j.optlastec.2021.107640

Cited by 28 publications

(8 citation statements)

References 18 publications

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“…From 0 to 4 min, the friction pair starts being in contact with the coating surface, characterized by instability, rough friction surface and a violent wear process. Thus, the friction coefficient exhibits fluctuating changes [ 24 , 25 , 26 ]. After more than 4 min, the wear on the cladding layer becomes stable, and grooves on the friction surface are gradually flattened.…”

Section: Resultsmentioning

confidence: 99%

Study on Microstructure and Properties of Ni60A/WC Composite Coating by Alternating-Magnetic-Field-Assisted Laser Cladding

et al. 2022

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Ni60A/WC composite coating is prepared on 45 steel substrate by alternating-magnetic-field-assisted laser cladding. We compare the effects of different magnetic field intensity on WC particle distribution, microstructure, phase composition, microhardness and wear; in addition, the mechanism of alternating magnetic fields on cladding layers is briefly analyzed. The results show that an alternating magnetic field can significantly homogenize the distribution of WC particles. WC particles at the bottom are stirred and dispersed to the middle and upper area of the laser pool. The distribution of WC in the bottom region 6 of the coating decreases from 19.1% to 10%, the distribution of WC in the bottom region 5 decreases from 46.46% to 33.3%, the WC distribution in the top region 1 of the coating increases from 0 to 7.7% and the WC distribution in the top region 2 of the coating increases from 8.08% to 12.2%. The stirring of alternating magnetic fields strengthens the solute convection in the laser pool, refines the snowflake-shaped carbide hard phase and improves the coating microhardness and wear property, and adhesive wear and abrasive wear decrease gradually with increasing magnetic field strength.

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Section: Resultsmentioning

confidence: 99%

Study on Microstructure and Properties of Ni60A/WC Composite Coating by Alternating-Magnetic-Field-Assisted Laser Cladding

et al. 2022

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“…There are no obvious peaks of SiO 2 and MnO 2 . Due to the high affinity between Cr and C, the CrC phase is formed [12]. It can be seen from the figure that the diffraction peak of the CrC phase in K2 is significantly greater than that of K1 and K2.…”

Section: Phase Compositionsmentioning

confidence: 95%

Wear characteristics of flat die in flat die pellet mills based on Glycyrrhiza uralensis

Ren

Shi

et al. 2022

Mater. Res. Express

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During granulation, a serious wear problem may be found in flat die as a key component of a flat die pellet mill. Specific to this problem, Glycyrrhiza uralensis was selected as the wear-causing material to investigate the wear mechanism of the flat die. Additionally, carburizing steel (20Cr and 20CrMnTi) and stainless steel (4Cr13) commonly used in flat die were adopted to conduct wear tests. To explore the influence of Glycyrrhiza uralensis powder and rods on friction and wear properties of the above three types of steel materials, a CFT-I general-purpose tester for surfaces was applied under dry friction conditions. Moreover, x-ray diffractometer (XRD), three-dimensional profilometry, scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS) were used to analyze the phase compositions, surface morphologies, and elementary compositions of the samples. As demonstrated by relevant results, the influence of Glycyrrhiza uralensis on the flat die is primarily embodied in abrasive, adhesive, and fatigue wear, and a thermal oxidation reaction occurs on the surface of the flat die. By comparing the wear conditions of the three steel materials between the powder and rods of Glycyrrhiza uralensis, it is found that flat die damages caused by glycyrrhiza rods are more severe than those of its powder. Additionally, the lowest friction coefficients are generated by 20CrMnTi, which are 0.40 and 0.88, respectively. In terms of the mean wear depth, its values are 1.2 and 2 μm, which are below those of 20Cr and 4Cr13. The results herein reveal that flat die made of 20CrMnTi have excellent wear and ductile fracture resistance characteristics. Hence, this study may provide a theoretical guide for selecting flat die materials.

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“…That is, after adding lanthanum oxide, the grains of the nickel-titanium alloy were refined and the wear resistance was improved. Shi et al [24] investigated the effect of lanthanum oxide content on the wear resistance of laser cladding Ni60a/SiC coatings. It is showed that the friction coefficient and wear depth of coatings with 2 wt% La 2 O 3 addition were 0.63 and 15.79 µm, respectively, which were 3% and 86% lower than those of the 65Mn matrix, respectively.…”

Section: Effect Of Rare Earth Oxide On Am Alloy Propertiesmentioning

confidence: 99%

Effect of Lanthanum Oxide Addition on Microstructure and Wear Performance of Iron-Chromium Alloy Manufactured by Laser Direct Deposition Additive Manufacturing

et al. 2022

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Additive Manufacturing (AM) has become increasingly common, and its use in various industries is increasing. However, the microstructure, friction and wear performance of metals made by AM, such as the inexpensive and relatively good-performing iron-chromium alloys, require further investigation. Generally, adding rare earth elements can effectively improve the performance of AM alloys, such as tensile strength, wear resistance, corrosion resistance, creep resistance, etc. This work aims to study the variation of microstructure, friction and wear properties of laser additive manufacturing processed iron-chromium alloys after adding different mass fractions of La2O3. The observations obtained by scanning electron microscopy showed that, with the addition of La2O3, the microstructure of AM alloy becomes more uniform and the grains are significantly refined. It is found by friction test that the running-in period is significantly shortened after the addition of La2O3. The coefficient of friction is reduced to a minimum of 0.68. Compared with AM alloys without La2O3, the wear rate of AM alloys with La2O3 is significantly reduced, with a maximum reduction of 38%. Using an optical microscope to observe the surface morphology of the wear scar, it is found that, after adding rare earth oxide, the wear mechanisms changed from adhesive wear and abrasive wear to abrasive wear, with the spalling of hard particles at the same time.

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Effect of La2O3 addition on wear properties of Ni60a/SiC coating using laser-cladding

Cited by 28 publications

References 18 publications

Study on Microstructure and Properties of Ni60A/WC Composite Coating by Alternating-Magnetic-Field-Assisted Laser Cladding

Study on Microstructure and Properties of Ni60A/WC Composite Coating by Alternating-Magnetic-Field-Assisted Laser Cladding

Wear characteristics of flat die in flat die pellet mills based on Glycyrrhiza uralensis

Effect of Lanthanum Oxide Addition on Microstructure and Wear Performance of Iron-Chromium Alloy Manufactured by Laser Direct Deposition Additive Manufacturing

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