Effect of boron addition on three-body abrasive wear characteristics of high chromium based multi-component white cast iron

Purba, Riki Hendra; Shimizu, Kazumichi; Kusumoto, Kenta; Gaqi, Yila; Todaka, Takayuki

doi:10.1016/j.matchemphys.2021.125232

Cited by 25 publications

(9 citation statements)

References 35 publications

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“…This may be due to the larger size of NbC carbides than VC. In some previous studies [11,13,20], it has been reported that larger carbide sizes have lower wear resistance properties due to their brittleness. However, this condition is unlike the one observed in this study.…”

Section: Three-body Abrasive Wear Mechanismmentioning

confidence: 99%

“…In addition, it is well known in the literature that the properties of hardness and abrasion also considerably affect the wear resistance of these alloys [5,9,10]. Nevertheless, it is important to note that the presence of M 7 C 3 carbides in the microstructure makes it susceptible to cracking due to its low level of strength resulting in its very limited application [11][12][13]. Several attempts have been made by experts in the area to overcome this problem, for example, by modifying the matrix, the orientation of the M 7 C 3 carbides, and refining the size of the carbides.…”

Section: Introductionmentioning

confidence: 99%

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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

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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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Section: Three-body Abrasive Wear Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

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

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“…B can be solidly dissolved in the M 7 C 3 carbide of HCCI to increase the hardness of M 7 (C, B) 3 [16]. Adding 1.5 wt% B can improve the wear resistance of HCCI while adding 3 wt% B harms the wear resistance of HCCI [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Multi-Element Microalloying on the Structure and Properties of High Chromium Cast Iron

et al. 2023

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High chromium cast iron (HCCI) has been widely used as wear-resistant material in the industry. Alloying is an effective way to improve the microstructure and mechanical properties of HCCI. This paper added multi-component V-Fe-Ti-Nb-C-Zr-B alloy (VFC) to HCCI, showing a significant synergistic solution-strengthening effect. The results show that the added V-Ti-Nb-B are dissolved in M7C3 carbide to form the (Cr, Fe, V, Ti, Nb)7(C, B)3 alloy carbide, and a small amount of V and all Zr are dissolved in austenite and martensite. Adding VFC into HCCI improved the hardenability of HCCI, decreased the residual austenite content from 6.0 wt% to 0.9 wt%, increased the martensite content from 70.7 wt% to 82.5 wt%, and changed the structure and content of M7C3 carbide. These changes increased the hardness of as-cast and heat-tread HCCI by 1.4% and 4.1%, increased the hardness of austenite and martensite by 7.9% and 7.0%, increased the impact toughness by 16.9%, and decreased the friction coefficient and wear loss by 2.3 % and 7.0 %, respectively. Thus, the hardness, toughness, wear resistance, and friction resistance of HCCI alloy are improved simultaneously.

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“…Based on this, it is extremely important and effective to improve mechanical properties, such as reducing grain size [4], increasing hardness [5], and creating residual compression stresses [6]. The mechanisms of wear of the wheel-rail system can be divided into three types [7] adhesive wear, which occurs during relative movement when irregularities are welded, at high loads in certain areas and are torn on the opposite surface [8][9][10], abrasive wear, when solid particles or solid protrusions on the contacting surfaces touch and move along the surface [11][12][13], fatigue wear occurs because the contacting surfaces are subjected to cyclic loading with the formation and propagation of cracks and separation of wear particles [14][15][16]. When turning and milling, a riveted layer with increased microhardness is formed on the surface of the part.…”

Section: Introductionmentioning

confidence: 99%

Technological methods for improving the tribotechnical properties of materials of rail transport wheels

Biryukov,

Kulikov,

Yakubovsky

2023

E3S Web of Conf.

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The paper presents the results of metallographic studies and tribotechnical tests of samples of grade 2 wheel steel in the form of bushings, the end surface of which was processed using turning and milling operations. It was found that the greatest influence on the microhardness of the surface layers during milling was exerted by the tool feed rate. When turning samples without coolant, the microhardness of the modified layer is higher than when processing with the use of coolants in various variants. It is shown that three factors influenced the microhardness during turning, the temperature in the cutting zone, the oxidation of the surface and the magnitude of plastic deformations. The regularities of changes in the coefficients of friction from the type of processing were obtained, and after milling they were significantly lower than after the flow. The modified layers after milling had greater depth and wear resistance compared to similar layers after turning.

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Effect of boron addition on three-body abrasive wear characteristics of high chromium based multi-component white cast iron

Cited by 25 publications

References 35 publications

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

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

Effect of Multi-Element Microalloying on the Structure and Properties of High Chromium Cast Iron

Technological methods for improving the tribotechnical properties of materials of rail transport wheels

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