The role of boron content in high alloy white cast iron (Ni-Hard 4) on microstructure, mechanical properties and wear resistance
| Autor: | Mustafa Çöl, Durmuş Kır, Hasan Öktem, Funda Gül Koç |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Toughness
Materials science Scanning electron microscope Alloy Metallurgy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Surfaces Coatings and Films Carbide 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Mechanics of Materials Materials Chemistry engineering Cast iron 0210 nano-technology Boron Tribometer |
| Zdroj: | Wear. :158-165 |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/j.wear.2015.12.007 |
| Popis: | High alloy white cast iron materials (Ni-Hard 4/ASTM A532) are widely used in cement, concrete and mining industries due to high wear resistance. In this study, the effect of boron on the microstructure, mechanical properties and wear resistance in white cast iron containing different contents of boron was investigated. For this purpose, ferro-boron was used during cast that boron will occur with the contents of 0.26%, 0.37%, 0.49% and 0.55% in the material. Specimens were austenitized at 850 °C for 5 h, quenched in air and tempered at 250 °C for 4 h. Wear tests were carried out using a pin-on-disc tribometer under dry sliding conditions. Three-point bending tests were performed to determine the toughness properties. Microstructure, fracture and worn surfaces were investigated with scanning electron microscope. The results show that amount of carbide increases as boron content increases. This situation provides positive contribution on materials hardness and wear resistance. Toughness properties decrease as the boron content increases. |
| Databáze: | OpenAIRE |
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