Composition, microstructure, hardness, and wear properties of high-speed steel rolls

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-999-0329-9· OSTI ID:316045

Park, J W; Lee, H C ^[1]; Lee, S ^[2]

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1. Kangwon Industries, Ltd., Pohang (Korea, Republic of). Roll Mfg. Div.
2. Pohang Univ. of Science and Technology (Korea, Republic of). Center for Advanced Aerospace Materials

The effects of alloying elements on the microstructural factors, hardness, and wear properties of four high-speed steel (HSS) rolls fabricated by centrifugal casting were investigated. A hot-rolling simulation test was carried out using a high-temperature wear tester capable of controlling speed, load, and temperature. The test results revealed that the HSS roll containing a larger amount of vanadium showed the best wear resistance because it contained a number of hard MC-type carbides. However, it showed a very rough roll surface because of cracking along cell boundaries, the preferential removal of the matrix, and the sticking of the rolled material onto the roll surface during the wear process, thereby leading to an increase in the friction coefficient and rolling force. In order to improve wear resistance with consideration to surface roughness, it is suggested that a reduction in the vanadium content, an increase in solid-solution hardening by adding alloying elements, an increase in secondary hardening by precipitation of fine carbides in the matrix, and formation of refined prior austenite grains by preaustenitization treatment be employed to strengthen the matrix, which can hold hard carbides in it.

• Sponsoring Organization: USDOE
• OSTI ID: 316045
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 2 Vol. 30; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBIDES
CHEMICAL COMPOSITION
FRICTION
HARDNESS
MANUFACTURING
MICROSTRUCTURE
ROLLING
ROUGHNESS
STEELS
WEAR RESISTANCE