Effect of Laser-Clad NiCrAl-SiC Coatings on Friction-Wear Performance of AISI H13 Steel at High Temperature

Cr coatings were deposited on AISI H13 steel substrates by means of electrospark deposition (ESD). The coatings were characterized in terms of their microstructure, hardness, friction and wear behavior and high-temperature oxidation resistance. Micro-indentation and tribometer testers were employed to measure the mechanical properties of Cr coatings and AISI H13 steel. The results showed that the hardness of the coatings ranged from 600 to 660 HV, with a higher value than that of AISI H13 steel (510 HV). The coefficient of steady-state friction of the coatings against 45-carbon-steel balls ranged from 0.23 to 0.27, with a lower value than that of AISI H13 steel (0.62-0.68). The isothermal oxidation behavior of the coatings at 850°Cwas studied in comparison with AISI H13 steel substrates. The results indicated that Cr coatings substantially increase the high-temperature oxidation resistance of AISI H13 steel and the oxidation process was retarded mainly by the presence of a Cr2O3 oxide scale on the coatings at 850°C for 100 hours.

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Improvement of Thermal Oxidation Resistance of AISI H13 Steel via Hot-Dipped Aluminizing

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.778.124 ◽

2015 ◽

Vol 778 ◽

pp. 124-127

Author(s):

Wen Guang Li ◽

Feng Wang ◽

Qiu Yang Zhang ◽

Yin Zhou ◽

Shu Qi Wang

Keyword(s):

Weight Gain ◽

High Temperature ◽

Oxidation Resistance ◽

Isothermal Oxidation ◽

H13 Steel ◽

Aisi H13 Steel ◽

Temperature Diffusion ◽

Aluminized Steel ◽

Aisi H13 ◽

Carbide Particles

The aluminized coating on AISI H13 steel was prepared via hot-dipped aluminizing and subsequent high-temperature diffusion. Isothermal oxidation tests of the aluminized and untreated H13 steel were performed. The results showed that the aluminized coating consisting of FeAl and Fe3Al was achieved with Kikendall porosity and carbide particles agglomeration. Compared to the untreated steel, the aluminized steel presented an excellent oxidation resistance and its weight gain slightly increased at 650 and 850°C. At 850°C, the untreated H13 steel had a worse oxidation resistance and the weight gain increased linearly with the increase of oxidation time. Al2O3 was preferentially formed on unspoiled surface and provided a barrier to obstruct the oxygen into the coating, while Fe2O3 formed around cracks had no protection.

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Effects of the high temperature plasma immersion ion implantation (PIII) of nitrogen in AISI H13 steel

Journal of Materials Science ◽

10.1007/s10853-008-2768-x ◽

2008 ◽

Vol 43 (17) ◽

pp. 5989-5997 ◽

Cited By ~ 8

Author(s):

L. L. G. da Silva ◽

M. Ueda ◽

C. B. Mello ◽

E. N. Codaro ◽

C. M. Lepienski

Keyword(s):

High Temperature ◽

Ion Implantation ◽

H13 Steel ◽

Temperature Plasma ◽

Aisi H13 Steel ◽

High Temperature Plasma ◽

Aisi H13 ◽

Plasma Immersion Ion Implantation

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Studies on Influence of WC on Scratch and Hot Corrosion Resistance of AISI H13 Steel by Flame-Sprayed Coatings of EWAC 1001

ISRN Materials Science ◽

10.5402/2011/273706 ◽

2011 ◽

Vol 2011 ◽

pp. 1-10

Author(s):

K. Gokul Kumar ◽

N. Arivazhagan

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Corrosion Behaviour ◽

Steel Substrate ◽

Microstructural Analysis ◽

High Temperature Corrosion ◽

Experimental Investigations ◽

H13 Steel ◽

Aisi H13 Steel ◽

Aisi H13

This paper presents the experimental investigations carried out to study the influence of addition of Tungsten Carbide (WC) on the scratch resistance and high-temperature corrosion behaviour of flame-sprayed EWAC 1001 coatings on the AISI H13 steel substrate. The improvement in properties was analysed by conducting various tests such as microstructural analysis, microhardness, and scratch tests. Moreover, high-temperature corrosion tests were carried out on the coated as well as uncoated AISI H13 steel by exposing the material to air oxidation at 700°C under cyclic conditions. The thermogravimetric technique was used to establish kinetics of corrosion, whereas XRD and SEM/EDAX techniques which were used to analyze the AISI H13 steel with EWAC 1001 coating containing WC showed better resistance to high-temperature corrosion as compared to that of uncoated AISI H13 steel. It is observed that the formation of Cr2O3, NiO, and NiCr2O4 contributes to the enhancement of high temperature corrosion resistance of the coating. The formation of unprotective Fe2O3 oxide leads to intense spalling and peeling of the scales in the uncoated material. The results presented in this paper would be beneficial for improving properties of tools used in the die-casting industry.

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