Microstructural evaluation and high-temperature erosion characteristics of high chromium cast irons

Shimizu, Kazumichi; Purba, Riki Hendra; Kusumoto, Kenta; Yaer, Xinba; Ito, Jun; Kasuga, Hiroyuki; Gaqi, Yila

doi:10.1016/j.wear.2019.01.043

Cited by 30 publications

(19 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where the more addition of Cr will have a higher carbide volume fraction (CVF). [3][4][5] In most studies, it has been revealed that the high chromium white cast iron (HCCI) containing M 7 C 3 carbide is more resistant to abrasive wear than other carbide types due to its higher hardness. However, at the same time, it is easy to crack due to low toughness resulting in limited application.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The difference in steady state erosion rates of IS 2062 structural steel and SAE 208 boiler steel eroded at 30°and 90°impact angles are comparatively lower, with 22.16% and 18.69% respectively. Hardness value of SAE 213 T12 and SAE T91 boiler steel is much higher than SAE 208 steel and IS 2062 structural steel due to presence of high Cr content [10]. Figure 6 also represent that high hardend surface has better erosion resistance at both 30°a nd 90°impact angle.…”

Section: Experimentationmentioning

confidence: 88%

“…Wear scars are found to be elliptical mostly at 30°, 60°, 90°and circular at 90°. Shimizu et al [10] evaluated the erosion characterstic of high Cr cast iron at 1173 K and found that at high temperature, more Cr content having better erosion resistance. Zaragoza-Granadou et al [11] studied the microstructural characterstic of eroded surface of AISI 310 steel and found that mostly the sections are affected by plastic deformation, ploughing, cracking and flacking.…”

Section: Introductionmentioning

confidence: 99%

Erosion behaviour of boiler component materials at room temperature and 400 °C temperature

Singh

Mishra

2020

Mater. Res. Express

View full text Add to dashboard Cite

Degradation of boiler tube components in Indian thermal power plants is mainly done through solid particle erosion due to exposure in erosive ash environment. Some important parameter such as hardness, erodent velocity, temperature, impact angle, shape and size are majorly affected the erosion wear. In this study, the erosion wear behaviour of SAE 208 grade steel, SAE213-T12 boiler steel, SAE213-T91 boiler steel and IS 2062 structural steel were investigated using an air jet erosion test rig. The erosion tests were carried out at the impact angles of 30°and 90°, impact velocity of 42.3 m/s at room temperature and 400°C. The position of sample holder was adjusted in such a way that erosion wear scar occur at the central region of the samples. For each experiment, the erosion test was continued until the steady state erosion rate was achieved as per ASTM standard. The variation in erosion rate data has been plotted against cumulative mass of erodent for boiler and structural steel samples. The steady state erosion rates for different steel samples are calculated and compared. The surfaces of tested samples are analyzed using scanning electron microscopy to understand the erosion mechanism. The results showed that the ductile behaviour of erosion mechanism is dominated at both room temperature and 400°C temperature. Mechanism involved at 90°impact angle is plastic deformation with formation of craters and at 30°impact angle is cutting and ploughing.

show abstract

“…These alloys usually contain between 15 and 30% Cr [1]. Wear resistance increases as the percentage of chromium increases [3]. The type and distribution of eutectic or secondary carbides depend on the composition of the alloy and the heat treatments it is subjected to [1].…”

Section: Introductionmentioning

confidence: 99%

“…The weight loss per unit time (mg/min) was determined from the average values obtained at each test time. As noted in the aforementioned standard, the results are shown in mm3 of material loss per gram of abrasive (mm 3 /g). • The following microstructural variables: o percentage by weight of austenite o percentage by weight of martensite o percentage by weight of carbides o volume of the austenite crystal cell…”

mentioning

confidence: 99%

Optimization of Thermal Processes Applied to Hypoeutectic White Cast Iron containing 25% Cr Aimed at Increasing Erosive Wear Resistance

González-Pociño

Álvarez-Antolín

Lozano

2020

Metals

View full text Add to dashboard Cite

Hypoeutectic white cast irons containing 25% Cr are used in very demanding environments that require high resistance to erosive wear, for instance, the crushing and processing of minerals or the manufacture of cement. This high percentage in Cr, in turn, favors corrosion resistance. The application of a Design of Experiments (DoE) allows the analysis of the effects of modifying certain factors related to the heat treatments applied to these alloys. Among these factors, the influence of prior softening treatment to facilitate the machining of these cast irons and the influence of the factors related to the destabilization of austenite, during both quenching and tempering, were analyzed. The precipitated phases were identified by X-ray diffraction (XRD), while the Rietveld structural refinement method was used to determine their percentages by weight. Erosive wear resistance was calculated using the ASTM G76 standard test method. It is concluded that the thermal softening treatment, consisting of 2 h at 1000 °C and 24 h at 700 °C, does not result in additional softening of the material compared to its as-cast state. Furthermore, it is observed that not only eutectic carbides influence wear resistance, but that the influence of the matrix constituent is also significant. It is also verified that the tempering treatment plays a decisive role in wear resistance. Temperatures of 500 °C and tempering times of 6 h increase the wear resistance and hardness of the aforementioned matrix constituent. Tempering temperatures of 200 °C lead to an increase in retained austenite content and the presence of M3C carbides versus mixed M7C3 and M23C6 carbides. The quench cooling medium is not found to have a significant influence on the hardness or wear resistance.

show abstract

Microstructural evaluation and high-temperature erosion characteristics of high chromium cast irons

Cited by 30 publications

References 23 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

Erosion behaviour of boiler component materials at room temperature and 400 °C temperature

Optimization of Thermal Processes Applied to Hypoeutectic White Cast Iron containing 25% Cr Aimed at Increasing Erosive Wear Resistance

Contact Info

Product

Resources

About