Comparison of the influence of molybdenum and chromium TIG surface alloying on the microstructure, hardness and wear resistance of ADI

Amirsadeghi, Alborz; Sohi, M. Heydarzadeh

doi:10.1016/j.jmatprotec.2007.11.157

Cited by 44 publications

(17 citation statements)

References 12 publications

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“…The trend of sliding wear exhibits that the cumulative wear rate of the hardfacing materials decreases with an increase in the percentage of carbon and chromium. This wear behavior is associated with the chromium surface alloying that results in the creation of hard chromium carbides, which increased higher load bearing capacity of the material, which is almost in agreement with the findings of Kang et al [16], Selvi et al [17] and Amirsadeghi and Sohi [19].…”

Section: Resultssupporting

confidence: 91%

“…This enhancement in the wear resistance is primarily due to the creation of greaterquantities of primary and secondary carbides in the ferrite matrix which isin agreement with the findings of Kang et al [16], Amirsadeghi and Sohi [19] and Kumar et al [20]. Therefore, it is anticipated that the variation in the CWR in the hardfacing alloys and base material is mainly due to the variation in their microstructure, chemistry and hardness as suggested by Kang et al [16].…”

Section: Resultssupporting

confidence: 88%

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Depositing Fe-C-Cr based Hardfacing Alloys on Steel Substrate for Enhancement in Wear Resistance

Shibe¹,

Chawla²

2017

IJET

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Abstract-Hardfacing is a surface alteration method mostly utilized for the deposition of superior and hard materials on the surface of a substrate with the help of some suitable welding process. This technique is generally used for improving the desirable surface characteristics, for example, erosion resistance, corrosion resistance, etc. of several engineering parts. In the present investigation three dissimilar Fe-C-Cr based hardfacing electrodes were deposited on the surface of ASTM A36 steel by using manual metal arc welding process for improving its wear resistance. Sliding wear behavior of bare ASTM A36 steel specimens and hardfaced ASTM A36 steel samples was studied on a pin-on-disc wear tester. It was observed that the sliding wear behavior and performance of all the hardfaced specimens was observed to be superior to that of bare ASTM A36 steel samples. The effect of the different hardfacings on the wear characteristics, behavior, performance and the extent of wear on ASTM A36 steel were thoroughly examined. The impact of the diverse hardfacing alloys on the wear characteristics, behavior, performance and the degree of wear on ASTM A36 steel were thoroughly examined.The effect of varying the percentage composition of chromium from 23% to 33% and carbon from 3.5% to 4.5% in the diverse Fe-C-Cr based hardfacing electrodes on the resultant microstructure and also the wear behavior of the deposited layers was studied. The comparison of cumulative wear rate (in Bowden) of all the hardfaced specimens with that of the bare ASTM A36 samples exhibited a considerable advancement in the wear resistance imparted by Fe-C-Cr based hardfacings over the ASTM A36 steel. Keyword -Cumulative Wear Rate (CWR), Hardfacing, Manual Metal Arc Welding (MMAW), Pin-on-Disc Wear Tester. I.INTRODUCTION The economic condition of individuals and industry is significantly affected by losses due to wear, hence they tend to focus on the causes of wear and methods that can improve wear resistance. All types of industries such as manufacturing, assembly, construction, automobiles, etc. face the problem of wear on components in service. Due to wear the components need frequent repair and replacement, which costs money and causes downtime of the equipment. Degradation of materials due to wear ultimately results in very high losses that affects the economic situation of all the countries as well as defames their reputation [1]. Erosive wear has been a persistent problem faced by boiler components such as boiler tubes, super-heater tubes and blades of induced draft fans, etc. especially in coal fired power plants.Commonly used surface alteration method is hardfacing in which hard and superior materials is meld onthe surface of the inferior base material by welding for improving its wear resistance [2]. Wear is the degradation of material from either of two surfaces in contact due to relative motion between them [3].Wear is generally a very slow process, but it goes on very steadily and continuously [4].Although due consideration has been paid b...

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 88%

Depositing Fe-C-Cr based Hardfacing Alloys on Steel Substrate for Enhancement in Wear Resistance

Shibe¹,

Chawla²

2017

IJET

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“…At a moderate cooling rate if < 5000 Ks -1 , the main microstructure structure is that of an interconnected network of primary dendritic with interdendritic eutectic 15 . However, laser cladding with Cr and Mo at the high cooling rates in the range of 21.2×10 5 …”

Section: Resultsmentioning

confidence: 99%

“…Relatively, the dual increase of hardness properties in the Cr-added clad from its substrate was because of grain formation. Meanwhile, rapid quenching of 3.52×10 5 Ks -1 and presence of particles during solidification obstructed atom settlement, thus resulting in grain formation in cast iron. Table 3 shows the range of layer depth of the clad zone, surface roughness and subsurface hardness of the samples at 1 mm laser spot size.…”

Section: Ksmentioning

confidence: 99%

“…This process can be achieved by using either laser beam or arc as the heat source to melt the added material during deposition onto the surface of the substrate. In laser cladding, addition of fine particles like Cr and Mo on the substrate surface resulted in enhanced strength, hardness and wear resistance 5,6 . A previous report showed that modifying surface using tungsten inert gas (TIG) in cast iron surface alloyed with chromium and molybdenum formed the structure of cementite, martensite, as well as retained austenite and primary carbides structure of (Fe,Cr) 7 C 3 and (Fe,Mo) 3 C 5 .…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Evolution and Phase Transformation in Laser Cladding of Cr and Mo Powder on Grey Cast Iron: Mixture Design of Experiment (DOE)

et al. 2017

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Laser cladding on grey cast iron at high power processing was investigated for microstructural evolution and phase transformation to enhance surface properties. Cladding was designed using a mixture of DOE with peak power (Pp) and pulse repetition frequency (PRF), and a mixture component of Cr and Mo ratio as factors. Microstructural findings indicated absolute elimination of graphite phase from the clad zone, in conjunction with particles evolution occurrence. Meanwhile, Cr, Mo and Fe phases were detected on the clad surface, along with M-C carbide, retained austenite and MoFe formation. The clad surface with addition of Mo exhibited a high hardness value of 945.5 HV 0.1 due to carbide formation. As a result of high peak power penetration into substrate surface, the depth range of clad zone was 53 to 131 µm. From the optimisation, the highest desirability is 82.3 %. Cladding with molybdenum powder addition was found to have produced minimum surface roughness, maximum depth and hardness of 9.14 µm, 110 µm and 891.1 HV 0.1 , respectively.

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Enhancement of Cavitation Erosion Resistance of Cast Iron with TIG Remelted Surface

Mitelea

Bena

Bordeaşu

et al. 2019

Metall Mater Trans A

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Comparison of the influence of molybdenum and chromium TIG surface alloying on the microstructure, hardness and wear resistance of ADI

Cited by 44 publications

References 12 publications

Depositing Fe-C-Cr based Hardfacing Alloys on Steel Substrate for Enhancement in Wear Resistance

Depositing Fe-C-Cr based Hardfacing Alloys on Steel Substrate for Enhancement in Wear Resistance

Microstructural Evolution and Phase Transformation in Laser Cladding of Cr and Mo Powder on Grey Cast Iron: Mixture Design of Experiment (DOE)

Enhancement of Cavitation Erosion Resistance of Cast Iron with TIG Remelted Surface

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