Effect of rare earth oxide nano-additives on micro-mechanical properties and erosion behavior of Fe-Cr-C-B hardfacing alloys

Gou, Junfeng; Wang, You; Wang, Chaohui; Chu, Ruiqing; Liu, Saiyue

doi:10.1016/j.jallcom.2016.08.323

Cited by 13 publications

(7 citation statements)

References 36 publications

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“…Previous reports have highlighted the cracking and fragments of rod-like PCC in the longitudinal section during wear. [12] This should be linked to the fascicular structure observed by specimen II in this study. Figures 9(a) through (c) shows the different cracking of the three typical microstructures as supporting frameworks.…”

Section: Resultsmentioning

confidence: 54%

“…[4] The initial growth morphology, crystallographic structure, and stacking faults of the PCC were investigated recently, [5,6] and the effect of the orientation of PCC on the wear resistance was also studied. [1,7] Grain refining elements [8][9][10] and rare metal elements [11,12] have beened added as the alloys improving its comprehensive performance. The effect of the cooling rate during welding and post-heat treatment on the microstructure of the matrix and the secondary carbides has been studied.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Primary Carbide on the Wear Resistance of Fe-Cr-C Coatings

Qing

Wang

Galindo-Nava

et al. 2020

Metall Mater Trans A

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The wear-resistant Fe-Cr-C coating has been widely used in industrial production owing to its high hardness and good comprehensive performance. Its anti-wear ability is mainly owing to the primary chromium carbides solidified during welding. In this study the effect of carbide morphology and distribution on the wear resistance of Fe-Cr-C coatings was investigated through experiment and simulation. In experiments, 3D microstructures of the typical carbides were examined using a high-resolution 3D X-ray computed tomography, and the 3D structures were then used in finite element simulation. Coatings with different morphologies and distributions of primary carbides were investigated. The results show that the fascicular primary chromium carbides break by the shearing stress during wear, leading to transverse fractures, while the mutual support among the homogeneous carbides contributes to the resistance of contact stress of the entire supporting framework, thereby imparting excellent wear resistance. Furthermore, the simulation results from the real 3D microstructure are consistent with the experimental ones. The fascicular structure produces a localized higher strain and larger stress concentration than the homogeneous one, implying higher abrasion loss in the former. These results will be helpful to optimize the structure design and final performance of the anti-wear Fe-Cr-C coatings. It will also be a new application of real-structure FE analysis in the widely used coatings for mining machines.

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Section: Resultsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

The Effect of Primary Carbide on the Wear Resistance of Fe-Cr-C Coatings

Qing

Wang

Galindo-Nava

et al. 2020

Metall Mater Trans A

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“…In addition, rare earth materials easily adsorb on the surface of eutectic carbides, which hinders the connection and growth of carbides, destroys the carbide network, and then forms rod-shaped and fishbone shaped carbides, passivating the sharp corners of carbides. The effect of stress concentration on the matrix can be reduced when subjected to external force to improve the service life of a roll [15][16][17]. However, Nb in the modifiers easily forms MC-type carbides with C in the melt, thus reducing segregation.…”

Section: Introductionmentioning

confidence: 99%

Effect of (NbTi)C Particles on the Microstructure and Hardness of High Chromium and Nickel Indefinite Chilled Cast Iron

et al. 2022

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High chromium and nickel indefinite chilled cast iron (ICCI), as an excellent hot roll material, is the preferred roll variety due to its good combination of surface roughness, hot crack resistance, and hot wear resistance. The microstructure and hardness of ICCI roll materials with different contents of (NbTi)C particles is studied here, and the microstructure evolution process is analyzed by X-ray diffraction. The influence of (NbTi)C particles on the carbide morphology and distribution is investigated by metallographic microscopy and scanning electron microscopy, and the existence of (NbTi)C particles is observed. The experimental results show that (NbTi)C particles are present in granular, rod, and polygonal forms. Combined with a Thermo-Calc solidification phase diagram, it is found that the (NbTi)C particles undergo eutectic precipitation in the melt, forming short rod-shaped (NbTi)C carbides with a size of about 10 μm. Through the Rockwell hardness test, it is found that the hardness after adding 0.8 wt % (NbTi)C particles was 54.4 HRC, which was 21.1% higher than that without the addition.

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“…They pointed out that the aged hardfacing coatings were more prone to pitting in pitting corrosion tests compared with the as-deposited hardfacing coatings. In addition to additive methods, cladding materials have also been extensively studied [ 16 , 17 , 18 , 19 ]. These studies have produced certain effects on the improvement in service life.…”

Section: Introductionmentioning

confidence: 99%

Gradient Structure Design and Welding-Hammering Hybrid Remanufacturing Process of Continuous Casting Rollers

et al. 2022

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To improve the service life and reduce the repair cost of continuous casting rollers, a new welding-hammering hybrid remanufacturing process in which the roller was designed with a gradient structure was proposed, and corresponding equipment was developed. First, the failure modes and their causes for a continuous casting roller were analyzed by numerical simulation. The cyclic tension–compression shear stress, cyclic tension–compression normal stress, thermal cycle, and highly corrosive environment caused fatigue cracking and overall peeling of the roller surface. Second, the gradient structure composed of a base layer, transition layer, and strengthened layer of a continuous casting roller was designed, and materials for each layer were selected according to their different service conditions. Third, novel equipment for continuous welding-hammering composite remanufacturing was developed, and the optimized process parameters were obtained through welding experiments. Finally, an application test was carried out; the microscopic analysis showed that refined grains, fewer welding defects, and better surface toughness were obtained. Compared with traditional remanufacturing processes without hammering, the welding-hammering hybrid process achieved a forged structure instead of as-cast structure, which significantly improved the service life of the continuous casting roller by about 100%.

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Effect of rare earth oxide nano-additives on micro-mechanical properties and erosion behavior of Fe-Cr-C-B hardfacing alloys

Cited by 13 publications

References 36 publications

The Effect of Primary Carbide on the Wear Resistance of Fe-Cr-C Coatings

The Effect of Primary Carbide on the Wear Resistance of Fe-Cr-C Coatings

Effect of (NbTi)C Particles on the Microstructure and Hardness of High Chromium and Nickel Indefinite Chilled Cast Iron

Gradient Structure Design and Welding-Hammering Hybrid Remanufacturing Process of Continuous Casting Rollers

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