Effect of Cr addition on the microstructure and abrasive wear resistance of WC-reinforced iron matrix surface composites

Li, Zulai; Jiang, Yehua; Zhou, Rong; Chen, Zhihui; Shan, Quan; Tan, Jun

doi:10.1557/jmr.2014.38

Cited by 22 publications

(12 citation statements)

References 33 publications

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“…In situ and ex situ methods could be applied to fabricate the composite reinforcement [10][11][12]. In the ex situ methods, the ceramic is previously produced with the required shape and then inserted into the mold [11,[13][14][15][16][17][18][19][20][21][22], while in situ methods aim to produce the ceramic particles through the combustion reaction of the powder compacts inserted in the mold cavity [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization of TiC–White Cast-Iron Composites Fabricated by In Situ Technique

et al. 2020

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High-chromium white cast-iron specimens locally reinforced with TiC–metal matrix composites were successfully produced via an in situ technique based on combustion synthesis. Powder mixtures of Ti, Al, and graphite were prepared and compressed to fabricate green powder compacts that were inserted into the mold cavity before the casting. The heat of the molten iron causes the ignition of the combustion reaction of the reactant powders, resulting in the formation of the TiC by self-propagating high-temperature synthesis. The microstructure of the resultant composites and the bonding interfaces was characterized by scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The microstructural results showed a good adhesion of the composite, suggesting an effective infiltration of the metal into the inserted compact, yet a non-homogeneous distribution of the TiC in the martensite matrix was observed. Based on the results, the in situ synthesis appears to be a great potential technique for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Microstructural Characterization of TiC–White Cast-Iron Composites Fabricated by In Situ Technique

et al. 2020

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“…The wear behavior of components made of high-Cr WCIs can be more improved by ceramic reinforcement of the surfaces that will be exposed to wear, maintaining the toughness of the bulk component [9][10][11][12][13][14][15][16][17]. Among the reinforcements that can be applied, WC particles are the most used, combining high hardness (3100-3600 HV), thermal expansion coefficient (4.5-7.1 × 10 −6 • C −1 ) compatible with the base metal (8-12.5 × 10 −6 • C −1 ), higher elastic modulus compared with other transition metal carbides and good wettability by molten iron [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Microstructural Characterization of a High-Cr White Cast Iron Reinforced with WC Particles

et al. 2020

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High-chromium white cast iron (WCI) specimens locally reinforced with WC–metal matrix composites were produced via an ex situ technique: powder mixtures of WC and Fe cold-pressed in a pre-form were inserted in the mold cavity before pouring the base metal. The microstructure of the resulting reinforcement is a matrix of martensite (α’) and austenite (γ) with WC particles evenly distributed and (Fe,W,Cr)6C carbides that are formed from the reaction between the molten metal and the inserted pre-form. The (Fe,W,Cr)6C precipitation leads to the hypoeutectic solidification of the matrix and the final microstructure consists of martensite, formed from primary austenite during cooling and eutectic constituent with (Fe,Cr)7C3 and (Fe,W,Cr)6C carbides. The presence of a reaction zone with 200 µm of thickness, between the base metal and the composite should guarantee a strong bonding between these two zones.

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“…Recently, particle reinforced metal matrix composite coating (also named particle reinforced metal matrix surface composites, PRMMSC) has attracted extensive attentions because a metal surface without coating can easily to suffer abrasion causing the degradation or failure of materials [ 1 ]. It is necessary and important to improve the surface properties such as mechanical properties (like strength, toughness and wear-resistance) and chemical properties (corrosion-resistance and oxidation-resistance) for prolonging the service life or minimizing loss of production [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Recently, the WC p /iron matrix surface composites have been extensively used in slurry pump, slurry elbow pipe, liner plate, roll fitting and so forth.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the WC p /iron matrix surface composites have been extensively used in slurry pump, slurry elbow pipe, liner plate, roll fitting and so forth. These composites can be fabricated by cast infiltration [ 2 , 11 , 12 ], powder metallurgy [ 3 ], laser cladding [ 5 , 6 , 13 , 14 , 15 , 16 , 17 ], and so on, to generate great metallurgical bonding between the surface composite layer and the substrate due to the perfect wettability between WC p and molten ferrous alloy.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a large number of researchers have carried out plenty of studies on the mechanical properties of metal matrix composites varying with the particle concentration, particle size, stress state, temperature and so on [ 2 , 4 , 11 , 18 , 19 , 20 , 21 , 22 , 23 ]. However, particle shape is also one of the most important geometric factors for the reinforcement and it can thus affect the overall performance of composites.…”

Section: Introductionmentioning

confidence: 99%

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The Particle Shape of WC Governing the Fracture Mechanism of Particle Reinforced Iron Matrix Composites

Wang

Shan

et al. 2018

Materials

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In this work, tungsten carbide particles (WCp, spherical and irregular particles)-reinforced iron matrix composites were manufactured utilizing a liquid sintering technique. The mechanical properties and the fracture mechanism of WCp/iron matrix composites were investigated theoretically and experimentally. The crack schematic diagram and fracture simulation diagram of WCp/iron matrix composites were summarized, indicating that the micro-crack was initiated both from the interface for spherical and irregular WCp/iron matrix composites. However, irregular WCp had a tendency to form spherical WCp. The micro-cracks then expanded to a wide macro-crack at the interface, leading to a final failure of the composites. In comparison with the spherical WCp, the irregular WCp were prone to break due to the stress concentration resulting in being prone to generating brittle cracking. The study on the fracture mechanisms of WCp/iron matrix composites might provide a theoretical guidance for the design and engineering application of particle reinforced composites.

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Effect of Cr addition on the microstructure and abrasive wear resistance of WC-reinforced iron matrix surface composites

Abstract: Abstract

Cited by 22 publications

References 33 publications

Microstructural Characterization of TiC–White Cast-Iron Composites Fabricated by In Situ Technique

Microstructural Characterization of TiC–White Cast-Iron Composites Fabricated by In Situ Technique

Preparation and Microstructural Characterization of a High-Cr White Cast Iron Reinforced with WC Particles

The Particle Shape of WC Governing the Fracture Mechanism of Particle Reinforced Iron Matrix Composites

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