Tribological Characteristics of High-Chromium Based Multi-Component White Cast Irons

Purba, Riki Hendra; Shimizu, Kazumichi; Kusumoto, Kenta; Gaqi, Yila; Huq, Mohammad Jobayer

doi:10.3390/cryst12101488

Cited by 4 publications

(4 citation statements)

References 40 publications

(52 reference statements)

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“…The relatively low wear resistance of the alloys studied is primarily associated with their cast state. In this state, as it was established earlier [55], the matrix alloy is subject to intense wear, and the primary crystals of (Fe,Cr) 7 C 3 carbide are subject to destruction. This regularity in the destruction of the contact surface was confirmed in all cases in a metallographic study of the wear surface of experimental samples.…”

Section: Wear Resistancementioning

confidence: 73%

“…The phase analysis performed showed that the samples of castings made of G-X300CrMo27-1 cast iron (3.75 wt%) crystallized under the above conditions, were formed mainly by the following phases of α-iron, Cr 7 C 3 ((Fe,Cr) 7 C 3 ), Fe 3 C, Fe 4 C и Cr 2 C (M 2 C) after TTM at all temperatures. It is typical for cast irons of the composition studied [54,55]. Comparison of the diffraction patterns of castings after TTM in the solid-liquid (1260 and 1300 °С) and liquid state (1380 °С) indicates (figure 9) that there is a significant change in the intensity of the peaks of the (Fe,Cr) 7 C 3 and Cr 2 C (M 2 C) phases depending on the TTM modes.…”

Section: Phase Analysismentioning

confidence: 91%

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Effect of thermal treatment of chromium iron melts on the structure and properties of castings

Panichkin¹,

Wieleba²,

Kenzhegulov³

et al. 2023

Mater. Res. Express

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The article describes the results of experimental studies for the effect of thermal treatment (TTM) of G-X300CrMo27-1 high-chromium cast iron samples in the solid-liquid and liquid state on the structure, phase composition and properties of ingots. For ingots with a carbon content of 2.8 to 4.5 wt.%, cooled at a rate of 3.3 * 10-2 deg/s, the dependencies of the structure, phase composition, composition of primary, eutectic carbides and matrix, hardness HV and microhardness of its individual phases and resistance to abrasive wear from the temperature of isothermal holding at TTM. A significant effect of the TTM temperature of melts on the structure and properties of high-chromium cast iron ingots were detected. The temperatures of inflection on the plotted curves for the characteristics of the structure and properties of the ingots were associated with a phase transition in iron at 1400 0С and with a point on the phase diagram liquidus of the Fe-Cr system. This as well as an increase in the concentration of chromium in the composition of primary carbides with an increase in the TTM temperature up to 1480 0С, made it possible to assume that (Cr, Fe)7C3 clusters stable in composition were formed in the melt of such cast irons below 1500 0С. The reasons for the decrease in the size of primary carbides during G-X300CrMo27-1 molten chromium iron overheating above 1500 0С were substantiated based on these data. During the TTM of fine-crystalline ingots made of hypereutectic cast iron in the temperature range between the liquidus and solidus lines, it was detected that the primary carbides (Cr, Fe)7C3 recrystallized resulting in a significant decrease in the chromium content and an increase in the iron content in them. At the same time, their sizes did not change significantly. Their share increased, and the share of eutectic carbides decreased. Such process also had a significant impact on the properties of the resulting ingots. The most preferable temperatures of hot metal cast irons in the liquid and solid-liquid states were identified based on the results of the studies.

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Section: Wear Resistancementioning

confidence: 73%

Section: Phase Analysismentioning

confidence: 91%

Effect of thermal treatment of chromium iron melts on the structure and properties of castings

Panichkin¹,

Wieleba²,

Kenzhegulov³

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…In general, the destabilization heat treatment of MWCI occurs as the alloy is heated at 1173-1423 K for several hours and is then quenched using the air-force-cooling method. The process is continued during the tempering process, where the alloy is re-heated at 693-813 K and then cooled using the air-force-cooling method [30][31][32]. Therefore, all the alloys were pre-heated at 1323 K for one hour and then As previously explained, the austenite matrix transforms into martensite during the heat treatment process, which effectively increases the strength and wear resistance of the alloy.…”

Section: Preparation Of Alloysmentioning

confidence: 99%

A Study of the Three-Body Abrasive Wear Resistance of 5V/5Nb-5Cr-5Mo-5W-5Co-Fe Multicomponent Cast Alloys with Different Carbon Percentages

et al. 2023

Self Cite

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Since it is well known in the literature that transition metals can form extremely hard carbides and effectively strengthen a material’s matrix, recently, some of them, such as V, Nb, Cr, Mo, and W, have been simultaneously added to cast iron. In addition, it is common to add Co to cast iron to strengthen the material’s matrix. However, the wear resistance of cast iron can also be considerably affected by the addition of C, which is rarely discussed in the literature by the experts. Therefore, the effect of C content (1.0; 1.5; 2.0 wt.%) on the abrasive wear behavior of 5 wt.% V/Nb, Cr, Mo, W, and Co alloys was investigated in this study. An evaluation was conducted using a rubber wheel abrasion testing machine in accordance with ASTM G65 with silica sand (1100 HV; 300 μm) as abrasive particles. The results show that plural carbides (MC, M2C, and M7C3) precipitated on the microstructure of the material, which is not unlike the behavior of other types of carbides as the quantity of C increases. The hardness and wear resistance properties of 5V-5Cr-5Mo-5W-5Co-Fe and 5Nb-5Cr-5Mo-5W-5Co-Fe multicomponent cast alloys increased as the quantity of C increased. However, we observed no significant difference in the hardness between the two materials with the same C additions, while 5Nb presented better wear resistance properties compared to the 5V sample due to the larger size of NbC compared to VC. Therefore, it can be determined that, in this study, the size of the carbide plays a more important role than its volume fraction and hardness.

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“…In previous studies [17], we also found (Fe 3.27 Cr 2.99 W 0.74 ) C 3 carbides in high-chromium cast iron coating. Purba et al [18] evaluated the relationship between the microstructure and three-body abrasive wear behavior of high-chromium-based (V, Mo, W and Co) multicomponent white cast iron materials. These studies showed that multielement doping can form multicomponent compounds, effectively improving the wear resistance of high-chromium cast iron.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Wear Resistance of High-Chromium Cast Iron with Multicomponent Carbide Coating via Laser Cladding

Chen,

Wang,

et al. 2023

Coatings

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High-chromium cast iron (HCCI) coatings with multicomponent carbides were prepared on low-alloy steel substrates using a laser cladding technique in this work. The microstructure and wear resistance of the coatings were characterized via optical microscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, X-ray diffraction and block-on-ring wear testing. Multicomponent carbides (Ti, Nb, Mo, W, V)C with an FCC structure and multicomponent compounds (Nb, Mo, W, V) (B,C) with an FCC structure were found in the microstructures of coatings after multielement doping. In addition, (Cr, Mo, W, V)23C6 compounds could be obtained by heat treatment. These multicomponent compounds were beneficial for obtaining coatings with an excellent hardness (60 HRC) and high wear resistance. This multielement doping method provides an effective modified method for preparing high-wear-resistance laser cladding coatings.

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Tribological Characteristics of High-Chromium Based Multi-Component White Cast Irons

Cited by 4 publications

References 40 publications

Effect of thermal treatment of chromium iron melts on the structure and properties of castings

Effect of thermal treatment of chromium iron melts on the structure and properties of castings

A Study of the Three-Body Abrasive Wear Resistance of 5V/5Nb-5Cr-5Mo-5W-5Co-Fe Multicomponent Cast Alloys with Different Carbon Percentages

Microstructure and Wear Resistance of High-Chromium Cast Iron with Multicomponent Carbide Coating via Laser Cladding

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