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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.11 [2004] >
IJEMS Vol.11(2) [April 2004] >
| Title: | Influence of sliding velocity on wear behaviour of different microstructures of Ni-Cr-Mo-V steel |
| Authors: | Rai, D
Pathak, J P |
| Issue Date: | Apr-2004 |
| Publisher: | CSIR |
| IPC Code: | Int.Cl.7 C22C 38/00 |
| Abstract: | The effect of
sliding velocity on wear property of six microstructural states of Ni-Cr-Mo-V
crane wheel steel under 4 kg load has been studied and discussed in detail. The
steel with 0.35 wt.% C, 0.68 wt.% Mn, 0.30 wt.% Si, 0.014 wt.% S and P, 0.68
wt.% Cr, 3.10 wt.% Ni, 0.40 wt.% Mo, 0.11 wt.% V, balance iron was hardened and
tempered at 225, 350, 450 and 550°C to
develop martensite and various hardened and tempered martensite
microstructures. With the help of controlled furnace cooling, a bainitic
structure was also developed. It was found that an increase in the tempering
temperature increased percentage elongation and reduction in area but decreases
the tensile strength. It was observed that increasing the velocity increased
the wear rate but beyond a certain sliding rate, wear decreased with an
increase in sliding velocity. Wear mechanism changed from mild/oxidative to
severe/metallic and then to oxidative with increasing the sliding velocity.
Hardened martensite showed highest wear resistance compared with various
tempered martensite. Martensite tempered at a lower temperature possessed a higher
wear resistance as compared to martensite tempered at a higher temperature. The
bainitic microstructure showed the highest wear rate in all cases irrespective
of velocity. |
| Page(s): | 113-120 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.11(2) [April 2004]
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