Preparation and characterization of TiC particulate locally reinforced steel matrix composites from Cu–Ti–C system with various C particles

In order to increase wear resistance cast steel casting the TiC-Fe-Cr type composite zones were fabricated. These zones were obtained by means of in situ synthesis of substrates of the reaction TiC with a moderator of a chemical composition of white cast iron with nickel of the Ni-Hard type 4. The synthesis was carried out directly in the mould cavity. The moderator was applied to control the reactive infiltration occurring during the TiC synthesis. The microstructure of composite zones was investigated by electron scanning microscopy, using the backscattered electron mode. The structure of composite zones was verified by the X-ray diffraction method. The hardness of composite zones, cast steel base alloy and the reference samples such as white chromium cast iron with 14 % Cr and 20 % Cr, manganese cast steel 18 % Mn was measured by Vickers test. The wear resistance of the composite zone and the reference samples examined by ballon-disc wear test. Dimensionally stable composite zones were obtained containing submicron sizes TiC particles uniformly distributed in the matrix. The macro and microstructure of the composite zone ensured three times hardness increase in comparison to the cast steel base alloy and one and a half times increase in comparison to the white chromium cast iron 20 % Cr. Finally ball-on-disc wear rate of the composite zone was five times lower than chromium white cast iron containing 20 % Cr.

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“…To the most popular ceramic phases used for castings reinforcements can be counted: TiC, WC, VC, TiN, Al 2 O 3 and ZrO 2 [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Olejnik

Szymański

Kurtyka

et al. 2016

Archives of Foundry Engineering

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“…Concerning the effect of C particle size, Liang et al [ 73 ] verified that the weakness of the interface bonding and the porosity of the composite zone increase with the C particles size (from ≈1 µm to ≈150 µm). The formation of the intermediate phase Fe 2 Ti is also associated with the larger C particles due to an incomplete combustion reaction.…”

Section: Cu-ti-b 4 C/cu-ti-c Systemsmentioning

confidence: 99%

Production of TiC-MMCs Reinforcements in Cast Ferrous Alloys Using In Situ Methods

2021

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This literature review aims to summarize the research conducted on the production of locally reinforced ferrous castings based on metal matrix composites reinforced with TiC (TiC-MMCs). One way to improve the wear resistance of cast components is to reinforce critical regions locally with metal matrix composites (MMCs) without changing the toughness of the component core. The in situ method of self-propagating high-temperature synthesis is one of the main approaches for the production of this enhanced material. Using this approach, the reinforcement is formed from a powder compact inserted in the mold cavity. The temperature of the liquid metal then produces the combustion reactions of the powders, which promote the formation of the ceramic phase. This paper focuses on eight powder systems used to synthesize TiC: Ti-C, Ni-Ti-C, Ni-Ti-B4C, Fe-Ti-C/Fe-Cr-Ti-C, Cu-Ti-B4C, Al-Ti-C, and Al-Ti-B4C, and provides an overview of the methodologies used as well as the effect of processing variables on the microstructural and mechanical characteristics of the reinforcement zones.

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“…In addition, due to the high price of Ti metal powder, the cost of synthesizing TiC x is also high with this method. The self-propagating high-temperature synthesis (SHS) [5][6][7] method uses the reaction heat of the TiC x formation reaction to keep the reaction going. This synthesis method requires high-purity and fine Ti powder as raw materials [8,9], and the yield is limited.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Models for the in Situ Reaction between Cu-Ti Melt and Graphite

Guo

Wen

Guo

2020

Metals

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The in situ reaction method for preparing metal matrix composites has the advantages of a simple process, good combination of the reinforcing phase and matrix, etc. Based on the mechanism of forming TiC x particles via the dissolution reaction of solid carbon (C) particles in Cu-Ti melt, the kinetic models for C particle dissolution reaction were established. The kinetic models of the dissolution reaction of spherical, cylindrical, and flat C source particles in Cu-Ti melt were deduced, and the expressions of the time for the complete reaction of C source particles of different sizes were obtained. The mathematical relationship between the degree of reaction of C source and the reaction time was deduced by introducing the shape factor. By immersing a cylindrical C rod in a Cu-Ti melt and placing it in a super-gravity field for the dissolution reaction, it was found that the super-gravity field could cause the precipitated TiC x particles to aggregate toward the upper part of the sample under the action of buoyancy. Therefore, the consuming rate of the C rod was significantly accelerated. Based on the flat C source reaction kinetic model, the relationship between the floating speed of TiC x particles in the Cu-Ti melt and the centrifugal velocity (or the coefficient of super-gravity G) was derived. It was proven that, when the centrifugal velocity exceeded a critical value, the super-gravity field could completely avoid the accumulation behavior of TiC x particles on the surface of the C source, thereby speeding up the formation reaction of TiC x . The goal of this study is to better understand and evaluate the generating process of TiC x particles, thus finding possible methods to increase the reaction efficiency

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Preparation and characterization of TiC particulate locally reinforced steel matrix composites from Cu–Ti–C system with various C particles

Cited by 17 publications

References 20 publications

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Production of TiC-MMCs Reinforcements in Cast Ferrous Alloys Using In Situ Methods

Kinetic Models for the in Situ Reaction between Cu-Ti Melt and Graphite

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