Erosive wear performance of heat treated multi-component cast iron containing Cr, V, Mn and Ni eroded by alumina spheres at elevated temperatures

The present study investigates effect of heat treatment on wear and friction behaviour of sillimanite/LM30 aluminium matrix composites at elevated temperatures (50–300 °C). The composites were prepared using a stir-casting process. Composites were reinforced with 3–15 wt.% sillimanite particle sizes of fine (1–20 μm):coarse (75–106 μm) in the ratio of 1:3, 1:1 and 3:1, respectively. Next, the composites were subjected to T4 and T6 heat treatment. For T4 heat treatment, composites were heated at 550 °C for 1 h, water quenched and naturally aged (at room temperature) for 480 h. Further, for T6 heat treatment composites were artificially aged at 200 °C for 4 h and air cooled. Hardness of composites improved with increase in particle weight percentage and increases in the ratio of fine particles in the mix. Maximum improvement in hardness was observed for 15 wt.% T6 heat-treated composites with fine:coarse in the ratio of 3:1. The addition of sillimanite particles improved wear resistance and coefficient of friction of the composites. Wear and friction analysis revealed that beyond 200 °C, wear behaviour of composites changed from mild to severe. Further, the heat treatment of composites improved wear resistance and coefficient of friction. Wear rate and friction coefficient of T6 heat-treated 15 wt.% composite with fine:coarse as 3:1 at 200 °C decreased by 70% and 52%, respectively. X-ray diffraction of wear tracks and wear debris of T6 heat-treated composites revealed the formation of intermetallics and oxides on the wornout surface of the composites. Scanning electron microscopy analysis of wear tracks and debris revealed that at elevated temperatures, abrasive and adhesive wear was dominant for the material removal mechanism. The developed composites exhibited nearly wear behaviour similar to that of grey cast iron used in brake rotors. Thus, sillimanite/LM30 aluminium matrix composites provide a suitable substitute to replace heavy grey cast iron components used in automobile industry.

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Microstructural and Erosive Wear Characteristics of a High Chromium Cast Iron

Coatings ◽

10.3390/coatings11050490 ◽

2021 ◽

Vol 11 (5) ◽

pp. 490

Author(s):

Annalisa Fortini ◽

Alessio Suman ◽

Alessandro Vulpio ◽

Mattia Merlin ◽

Michele Pinelli

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Erosion Resistance ◽

Erosive Wear ◽

High Chromium ◽

Wear Characteristics ◽

High Chromium Cast Iron ◽

Heat Treated ◽

The Impact ◽

Chromium Cast Iron

Surface material loss due to erosive wear is responsible for the increased cost of maintenance and downtime in industries. Hence, hardfacing is one of the most valuable and effective techniques employed to improve the wear resistance of heavy-duty components. The present paper investigates the microstructural and erosive wear characteristics of a hypereutectic high-chromium cast iron, considering the erosion resistance, resulting from the impact of micro-sized particles, of both as-received and heat-treated conditions. Micro-sized particles involve the erosion-resistant characteristics of carbide and matrix, contemporary. Due to this, the enhancement of the matrix strength could improve the mechanical support to withstand cracking deformation and spalling. Accordingly, the effect of a destabilization heat treatment on the microstructure was firstly investigated by hardness tests, X-ray diffraction analyses, optical and scanning electron microscopy. Specifically designed erosive tests were carried out using a raw meal powder at an impingement angle of 90°. The resulting superior wear resistance of the heat-treated samples was relayed on the improved matrix microstructure: consistent with the observed eroded surfaces, the reduced matrix/carbides hardness difference of the heat-treated material is pivotal in enhancing the erosion resistance of the hardfacing. The present results contribute to a better understanding of the microstructure–property relationships concerning the erosive wear resistance.

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DESTABILIZATION HEAT TREATMENT EFFECT ON EROSIVE WEAR CHARACTERISTICS OF HIGH CHROMIUM WHITE CAST IRON

Kufa Journal of Engineering ◽

10.30572/2018/kje/090204 ◽

2018 ◽

Vol 09 (02) ◽

pp. 45-56 ◽

Cited By ~ 1

Author(s):

Israa Yousif ◽

◽

Ali Ataiwi ◽

Keyword(s):

Heat Treatment ◽

Cast Iron ◽

Treatment Effect ◽

White Cast Iron ◽

Erosive Wear ◽

High Chromium ◽

Wear Characteristics

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FEDERATED F401.5Ni

Alloy Digest ◽

10.31399/asm.ad.al0212 ◽

1974 ◽

Vol 23 (12) ◽

Keyword(s):

Fracture Toughness ◽

Elevated Temperatures ◽

High Strength ◽

Heat Treating ◽

Casting Alloy ◽

Aluminum Casting ◽

Aluminum Casting Alloy ◽

Treated Condition ◽

Heat Treated ◽

Heat Treated Condition

Abstract FEDERATED F401.5Ni is a heat-treatable aluminum casting alloy with high strength and good wear resistance in the fully heat-treated condition. It is recommended for castings requiring good strength at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-212. Producer or source: Federated Metals Corporation, ASARCO Inc..

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RED CUT COBALT

Alloy Digest ◽

10.31399/asm.ad.ts0367 ◽

1980 ◽

Vol 29 (8) ◽

Keyword(s):

Fracture Toughness ◽

Cast Iron ◽

High Speed ◽

Elevated Temperatures ◽

High Speed Steel ◽

Heat Treating ◽

High Speeds ◽

Red Hardness ◽

Nonferrous Alloys ◽

Cutting Point

Abstract RED CUT COBALT steel is made by adding 5% cobalt to the conventional 18% tungsten -4% chromium-1% vanadium high-speed steel. Cobalt increases hot or red hardness and thus enables the tool to maintain a higher hardness at elevated temperatures. This steel is best adapted for hogging cuts or where the temperature of the cutting point of the tool in increased greatly. It is well adapted for tools to be used for reaming cast-iron engine cylinders, turning alloy steel or cast iron and cutting nonferrous alloys at high speeds. This datasheet provides information on composition, physical properties, and hardness as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-367. Producer or source: Teledyne Vasco.

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Effect of Heat Treatment on the As-Cast Microstructure and Hardness of NiSi3B2 Alloy

Metals ◽

10.3390/met11040539 ◽

2021 ◽

Vol 11 (4) ◽

pp. 539

Author(s):

Gonçalo M. Gorito ◽

Aida B. Moreira ◽

Pedro Lacerda ◽

Manuel F. Vieira ◽

Laura M. M. Ribeiro

Keyword(s):

Heat Treatment ◽

Elevated Temperatures ◽

Casting Process ◽

X Ray Diffraction ◽

Heat Treated ◽

Energy Dispersive Microanalysis ◽

Eutectic Constituent ◽

Backscattered Electron ◽

Corrosion And Oxidation ◽

Cast Microstructure

Cast Ni-Si-B alloys have the potential for high-temperature applications because of their high resistance to wear, impact, corrosion, and oxidation at elevated temperatures due to an appropriate balance of hard phases and austenite that ensures a good compromise between toughness and hardness. In this work, NiSi3B2 specimens, fabricated by the lost-wax casting process, were investigated. Given the complex multiphase cast microstructure, a differential scanning calorimeter (DSC-TGA) analysis was employed to characterize the reactions that occur during solidification and the resulting phases were characterized using scanning electron microscopy (SEM), with energy-dispersive microanalysis (EDS) and backscattered electron (BSE) image and X-ray diffraction (XRD). Due to the presence of hard phases, machining of the Ni-Si-B components can pose additional difficulties. Therefore, the conditions of the solution heat treatment, which might lead to the homogenization of the microstructure, consequently improving its machinability, were also investigated. The results of the heat-treated samples indicated that the dissolution of the eutectic constituent is accompanied by a significant decrease in the hardness (approximately 17%). It is important to emphasize that the solution heat treatments carried out reduced the hardness without affecting the percentage of borides, which will allow improving the machinability without adversely affecting the alloy performance in service.

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Evaluation of Slurry Erosive Wear Performance of Plasma-Sprayed Flyash-TiO2 Composite Coatings

Journal of Bio- and Tribo-Corrosion ◽

10.1007/s40735-021-00525-4 ◽

2021 ◽

Vol 7 (3) ◽

Author(s):

R. Keshavamurthy ◽

B. E. Naveena ◽

C. S. Ramesh ◽

M. R. Haseebuddin

Keyword(s):

Composite Coatings ◽

Erosive Wear ◽

Wear Performance ◽

Plasma Sprayed

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High-temperature erosive wear characteristics and bonding requirements of hard carbides cast-in insertion multi-component white cast iron

Wear ◽

10.1016/j.wear.2021.203672 ◽

2021 ◽

pp. 203672

Author(s):

Kenta Kusumoto ◽

Kazumichi Shimizu ◽

V.G. Efremenko ◽

Hiroya Hara ◽

Masato Shirai ◽

...

Keyword(s):

Cast Iron ◽

High Temperature ◽

White Cast Iron ◽

Erosive Wear ◽

Wear Characteristics

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Three-dimensional CFD modeling of thermal behavior of a disc brake and pad for an automobile

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctaa022 ◽

2020 ◽

Vol 15 (4) ◽

pp. 543-549

Author(s):

Haydar Kepekci ◽

Ergin Kosa ◽

Cüneyt Ezgi ◽

Ahmet Cihan

Keyword(s):

Cast Iron ◽

Friction Coefficient ◽

Elevated Temperatures ◽

Gray Cast Iron ◽

Three Dimensional ◽

Brake System ◽

Gray Cast ◽

Cfd Modeling ◽

Disc Brake ◽

Disc Material

Abstract The brake system of an automobile is composed of disc brake and pad which are co-working components in braking and accelerating. In the braking period, due to friction between the surface of the disc and pad, the thermal heat is generated. It should be avoided to reach elevated temperatures in disc and pad. It is focused on different disc materials that are gray cast iron and carbon ceramics, whereas pad is made up of a composite material. In this study, the CFD model of the brake system is analyzed to get a realistic approach in the amount of transferred heat. The amount of produced heat can be affected by some parameters such as velocity and friction coefficient. The results show that surface temperature for carbon-ceramic disc material can change between 290 and 650 K according to the friction coefficient and velocity in transient mode. Also, if the disc material gray cast iron is selected, it can change between 295 and 500 K. It is claimed that the amount of dissipated heat depends on the different heat transfer coefficient of gray cast iron and carbon ceramics.

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