Phase investigation in laser surface alloyed steels with TiC

Ariely, S.; Bamberger, Μ.; Hügel, H.; Schaaf, Peter

doi:10.1007/bf00351621

Cited by 20 publications

(4 citation statements)

References 8 publications

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“…Steel matrix composites reinforced with TiC particles have been successfully fabricated by powder metallurgy techniques, 1-6 reaction casting, 7 shielded metal arc deposition, 8 furnace melting and casting, 9,10 and high-energy melting methods such as electron beam, 11,12 gas tungsten arc, 13,14 laser beam, [15][16][17][18] and plasma transferred arc (PTA). 19,20 When corrosion resistance is also desired, stainless steel matrix composites reinforced with ceramic particles can be used.…”

Section: Introductionmentioning

confidence: 99%

Titanium carbide/duplex stainless steel (DSS) metal matrix composite coatings prepared by the plasma transferred arc (PTA) technique: microstructure and wear properties

Rokanopoulou

Papadimitriou

2010

J Coat Technol Res

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The present investigation focuses on the microstructure and the tribological properties of TiC/ steel composite coatings obtained on 2205 duplex stainless steel (DSS) substrate, by using the plasma transferred arc technique. Two different plasma and shielding gas mixtures have been used, namely (a) 100% Ar and (b) 95% Ar + 5%N 2 . The coatings obtained are defect-free and their thickness is 1.50 ± 0.05 mm. Both coatings consist of a dispersion of TiC x N y particles, with a volume fraction of about 18-22%, in an austenite-ferrite matrix. The austeniteto-ferrite volume fraction is 35/65% for the Ar coatings and it is found to increase to 40/60%, when nitrogen is used in the plasma and shielding gas. The hardness of the composite coatings is improved significantly (630-650HV on average) compared to the hardness of the substrate (250HV). The friction coefficient produced against an Al 2 O 3 counterbody has decreased considerably to 0.2-0.3 from 0.5 for the 2205/Al 2 O 3 pair and the wear rate was reduced at least by one order of magnitude with respect to the value of the 2205 DSS substrate.

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Section: Introductionmentioning

confidence: 99%

Titanium carbide/duplex stainless steel (DSS) metal matrix composite coatings prepared by the plasma transferred arc (PTA) technique: microstructure and wear properties

Rokanopoulou

Papadimitriou

2010

J Coat Technol Res

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“…However, this method (2) slag formation is minimized; (3) ceramic powders can demands a complex process to achieve a uniform TiC particle be saved by alloying only the surface region; (4) productivity dispersion. Other fabrication techniques such as liquid-phase is high, e.g., 72 m 2 area per hour; and (5) the fabrication sintering, [11] self-sustaining high-temperature synthesis, [12] cost is reduced because energy of 0.6 to 0.8 kWh is required plasma spraying, [13] and surface alloying using a laser [14][15][16][17][18] to treat 1 kg of powder. have also been used.…”

Section: Introductionmentioning

confidence: 99%

Effect of flux addition on the microstructure and hardness of TiC-reinforced ferrous surface composite layers fabricated by high-energy electron beam irradiation

Choo

Lee

Kwon

1999

Metall Mater Trans A

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Surface composites reinforced with TiC particulates were fabricated by high-energy electron-beam irradiation. In order to investigate the effects of flux addition on the TiC dispersion in surface composite layers, four kinds of powder mixtures were made by mixing TiC with 5, 10, 20, and 40 wt pct of the flux components (MgO-CaO). To fabricate TiC-reinforced surface composites, the TiC-flux mixtures were deposited evenly on a plain carbon steel substrate, which was subjected to electronbeam irradiation. Microstructural analysis was conducted using X-ray diffraction and Mössbauer spectroscopy as well as optical and scanning electron microscopy. The microstructure of the surface composites was composed of a melted region, an interfacial region, a coarse-grained heat-affected zone (HAZ), a fine-grained HAZ, and an unaltered original substrate region. TiC agglomerates and residual pores were found in the melted region of materials processed without flux, but the number of agglomerates and pores was significantly decreased in materials processed with a considerable amount of flux. As a result of irradiation, TiC particles were homogeneously distributed throughout the melted region of 2.5 mm in thickness, whose hardness was greatly increased. The optimum flux amount, which resulted in surface composites containing homogeneously dispersed TiC particles, was found to be in the range of 10 to 20 pct to obtain excellent surface composites.

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“…Carbide particles are frequently introduced in a tough matrix to form a particle-reinforced composite by various techniques. [3][4][5][6][7][8][9][10][11] Laser cladding of Fe-Cr-Mn-C produced improved wear-resistant surfaces due to the formation of complex carbide precipitates such as M 7 C 3 and M 6 C. [12,13] Hard and refractory TiC particles of various shapes have been deposited on 6061 Al alloy to achieve hard and wear-resistant surfaces using LSE. [14,15] It has also been reported in the past that wear resistance improves with the amount of carbide until it reaches a steady value.…”

Section: Introductionmentioning

confidence: 99%

Phase evolution during laser In-Situ carbide coating

Singh

Dahotre

2005

Metall Mater Trans A

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With the help of laser surface engineering, in-situ carbide composite coating on the surface of plain carbon steel was achieved. Energy dispersive spectroscopy (EDS) in supplement with X-ray diffractometry indicated the evolution of TiC, Fe-Cr, and M 7 C 3 as major phases in the coating. A variation in the evolution of M 7 C 3 phase was observed with respect to the laser power over the range of 900 to 2100 W (3 mm ϫ 600 m rectangular beam spot) during processing. Computational techniques were employed with the aim of studying possible reasons for phase evolution, stability of phases, solidification path, and optimization of parameters to stabilize the M 7 C 3 phase and hence tailor properties.

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Phase investigation in laser surface alloyed steels with TiC

Cited by 20 publications

References 8 publications

Titanium carbide/duplex stainless steel (DSS) metal matrix composite coatings prepared by the plasma transferred arc (PTA) technique: microstructure and wear properties

Titanium carbide/duplex stainless steel (DSS) metal matrix composite coatings prepared by the plasma transferred arc (PTA) technique: microstructure and wear properties

Effect of flux addition on the microstructure and hardness of TiC-reinforced ferrous surface composite layers fabricated by high-energy electron beam irradiation

Phase evolution during laser In-Situ carbide coating

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