Abrasive wear characteristics of Fe-2C-5Cr-5Mo-5W-5Nb multi-component white cast iron

Kusumoto, Kenta; Shimizu, Kazumichi; Yaer, Xinba; Zhang, Yao; Ota, Yutaka; Ito, Jun

doi:10.1016/j.wear.2017.01.096

Cited by 30 publications

(18 citation statements)

References 14 publications

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“…It is known that the more variety of carbides formed in the microstructure results in higher hardness and wear resistance. [19][20][21] Besides that, it has been developed in earlier work by adding Ni (range: 0-5 wt.%) into MWCI. It has been clearly explained that Ni will not act as a carbide forming element but preferentially dissolve in the matrix of material and encourage the carbide formation leading to be better wear resistance at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Content on Three-body Abrasive Wear Characteristics of 28Cr-3Ni Cast Alloys

et al. 2021

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Abrasive wear resistance of white cast iron can be improved by adding transition metals due to carbide formation and matrix stabilization. However, it must also be affected by carbon content which has received little attention from researchers. Therefore, this study would investigate the influence of (1.4 and 2.8 wt.%) C on three body abrasive wear characteristics of 28Cr-3Ni cast alloys. High Cr-based multi-component white cast irons (Hi-Cr MWCIs) were used as comparison materials to estimate the life-service of each material. The abrasion test was performed using a rubber wheel abrasion machine test with two different sizes of silica sands (1100HV1).As results, the microstructure consists of martensite (the main matrix) and M 7 C 3 carbide. Additionally, M 2 C carbide was also precipitated on the microstructure of Hi-Cr MWCIs. Meanwhile, Ni or Co was embedded in the matrix area of materials microstructure. In the case of 28Cr-3Ni, the higher amount of C has a higher carbide volume fraction and hardness leading to be better abrasive wear resistance at high loads. However, the reverse trend occurred at low loads with different sizes of abrasive particles. By comparing to Hi-Cr MWCIs, its abrasive wear resistance is lower owing to the fewer carbide types. In the case of Hi-Cr MWCIs, the higher Cr addition significantly consumes C content during the solidification process resulting to lower hardness and wear resistance. Therefore, it can be concluded that the three abrasive wear performance of materials is strongly influenced by C content, applied load, and abrasive particle size.

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Section: Introductionmentioning

confidence: 99%

Effect of Carbon Content on Three-body Abrasive Wear Characteristics of 28Cr-3Ni Cast Alloys

et al. 2021

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“…Destabilization temperature and time, as well as the cooling rate used after treatment, not only determine the amount of carbide formed, but also its distribution, size and, in some cases, (e.g., for very long holding times) its nature, as well as the relative proportions of martensite to retained austenite [36]. Hardness depends on the amount of martensite and its C content, whereas abrasion resistance depends on the martensite as well as on the fraction and fineness of secondary carbides [37]. When the hardness increases, matrix wear occurs first, and then carbide flakes are formed under alternating stress.…”

Section: Introductionmentioning

confidence: 99%

“…The type of secondary carbides formed during destabilization treatment depends on composition and destabilization temperature. For instance, the presence of molybdenum in the chemistry of the alloy promotes the formation of other hard carbides in addition to the typical M 7 C 3 , including M 23 C 6 , M 6 C and M 2 C, depending on the Cr:C ratio [37,[42][43][44]. Some researchers have shown that excellent resistance to abrasive wear of Fe-Cr-C alloys with optimum toughness was obtained when a high-volume fraction of M 7 C 3 carbides was achieved within a martensitic matrix [45,46].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

González-Pociño

Lozano

Álvarez-Antolín

et al. 2021

Metals

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Hypoeutectic white cast irons with a high chrome content are commonly used in the industrial mining sector where there is a demand for both high resistance to adhesive wear and an acceptable toughness for the absorption of impacts and falls of diverse materials. Through the application of a design of experiment (DoE) technique, factors related to thermal treatment are analyzed with respect to resistance to sliding wear, maximum rupture stress and toughness. The results show that, in order to increase resistance to adhesive wear, it is convenient to use destabilization temperatures of 1050 °C and tempering of two hours at 400 °C. This foments a very hard martensite and a high proportion of highly alloyed retained austenite, which, with low tempering, achieves a precipitation of carbides from this austenite with hardly any loss of hardness of the martensite. In order to increase the energy which this material is capable of absorbing until breakage, furnace cooling set at 150 °C followed by tempering at 550 °C would be favorable. Slower cooling implies a greater quantity of conditioned retained austenite, so that, following this, it may be transformed into lower bainite with a high density of finely dispersed precipitated carbides. Furthermore, this tempering also allows the transformation of martensite into ferrite with finely dispersed carbides.

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“…To get primary vanadium carbides, at least vanadium amounts of 5% are necessary, other way vanadium only reinforces the M 7 C 3 carbide [14][15][16]. In the case of niobium, most works studying the effect of this carbide-forming element are limited to amounts of less than 3% [11,12,[17][18][19][20][21][22][23] but up to 5% have been also produced along with high amounts of Mo and W [24]. Niobium forms primary carbides in the liquid and are later enclosed by austenite upon solidification; the size and distribution of which depends on the solidification rate (thickness of the casting).…”

Section: Introductionmentioning

confidence: 99%

Niobium Additions to a 15%Cr–3%C White Iron and Its Effects on the Microstructure and on Abrasive Wear Behavior

Bedolla-Jacuinde

Guerra

Mejı́a

et al. 2019

Metals

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From the present study, niobium additions of 1.79% and 3.98% were added to a 15% Cr–3% C white iron, and their effects on the microstructure, hardness and abrasive wear were analyzed. The experimental irons were melted in an open induction furnace and cast into sand molds to obtain bars of 45 mm diameter. The alloys were characterized by optical and electron microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900 °C for 30 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under three loads (58, 75 and 93 N). The results show that niobium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming niobium carbides at the beginning of the solidification process; thus decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 24% for the iron with 3.98% Nb. However, the overall carbide content was constant at 30%; bulk hardness changed from 48 to 55 hardness Rockwell C (HRC) and the wear resistance was found to have an interesting behavior. At the lowest load, wear resistance for the base iron was 50% lower than that for the 3.98% Nb iron, which is attributed to the presence of hard NbC. However, at the highest load, the wear behavior was quite similar for all the irons, and it was attributed to a severe carbide cracking phenomenon, particularly in the as-cast alloys. After the destabilization heat treatment, the wear resistance was higher for the 3.98% Nb iron at any load; however, at the highest load, not much difference in wear resistance was observed. Such a behavior is discussed in terms of the carbide volume fraction (CVF), the amount of niobium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

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Abrasive wear characteristics of Fe-2C-5Cr-5Mo-5W-5Nb multi-component white cast iron

Cited by 30 publications

References 14 publications

Effect of Carbon Content on Three-body Abrasive Wear Characteristics of 28Cr-3Ni Cast Alloys

Effect of Carbon Content on Three-body Abrasive Wear Characteristics of 28Cr-3Ni Cast Alloys

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

Niobium Additions to a 15%Cr–3%C White Iron and Its Effects on the Microstructure and on Abrasive Wear Behavior

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