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Effect of Quenching Temperature on Microstructure and Properties of Al-Bearing High-Boron High-Speed Steel.
- Source :
- Transactions of the Indian Institute of Metals; Dec2019, Vol. 72 Issue 12, p3107-3116, 10p
- Publication Year :
- 2019
-
Abstract
- Microstructure and properties of the alloys could be changed by heat treatment process. In this work, effect of quenching temperature on the microstructure of Al-bearing high-boron high-speed steel (AB-HSS) was investigated by means of optical microscopy, scanning electron microscopy and X-ray diffraction. Hardness and wear resistance of AB-HSS at different quenching temperatures were tested by rockwell hardness tester, microhardness tester and wear tester, respectively. The experimental results indicate that the microstructure of as-cast AB-HSS is mainly composed of pearlite, ferrite, M<subscript>2</subscript>B-type boride and M<subscript>23</subscript>(C, B)<subscript>6</subscript>-type borocarbide. After quenched treatment, the matrix transforms into the martensite and the type of boride has no obvious change. The morphology of boride changes from continuous network and fish-bone to isolate shape and granular distribution. As quenching temperature increases, the hardness of alloy increases. The hardness reaches 65.1 HRC when quenching temperature is 1110 °C. The wear resistance of alloy gradually increases with the increase in quenching temperature. The wear resistance is the best when the quenching temperature reaches 1110 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09722815
- Volume :
- 72
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Transactions of the Indian Institute of Metals
- Publication Type :
- Academic Journal
- Accession number :
- 139773004
- Full Text :
- https://doi.org/10.1007/s12666-019-01776-z