Scuffing or scoring is an important form of damage leading to component replacements in lubricated mechanical systems such as power drives, gears, bearings, cams and followers, piston rings etc. Since scuffing necessarily involves localized welding of asperities, suitable surface modifications or coating can impart a good resistance to scuffing. A new class of low temperature salt bath nitriding process provides good resistance to scuffing. The current work is on evaluation of the scuffing resistance of AISI 4340 steels imparted with two such treatments. Experimental investigations were conducted on Sursulf and Arcor treated AISI 4340 steel specimen using a pin on ring test system under boundary lubrication condition. Continuous monitoring of friction records and (near surface) bulk temperature were done under step loading. Limiting loads and load velocity relations were evaluated and using the data generated and a thermo-mechanical wear model, performance is indexed. Off line studies on surface finish, hardness variations and surface transformations were also accomplished. Some salient aspects of the investigation and data generated are presented here. Onset of scuffing was observed to be far delayed with pin specimen imparted with these treatments compared to hardening.

Issue Section:
Technical Papers
Keywords:
steel, wear, friction, lubrication, hardness, surface treatment, surface topography, liquid films
Topics:
Friction, Steel, Stress, Temperature, Wear, Thermomechanics
1.
Lee
,
S. C.
, and
Chen
,
H.
,
1995
, “
Experimental Validation of Critical Temperature-Pressure Theory of Scuffing
,”
Tribol. Trans.
,
38
, pp.
738
–
742
.
2.
Jinno
,
O.
,
Tyagi
,
M. R.
, and
Kimura
,
Y.
,
1996
, “
Influence of Surface Roughness on Friction and Scuffing Behavior of Cast Iron Under Sparse Lubrications
,”
Tribol. Int.
,
29
, pp.
129
–
136
.
3.
Obata
,
F.
,
Takehira
,
A.
,
Matsuo
,
K.
, and
Saeki
,
S.
,
1993
, “
Effects of Oil Viscosity on Seizure
,”
JSME International J. Series C
,
36
(
4
), pp.
523
–
529
.
4.
Jaramillo
,
E. F. E.
,
1996
, “
The Additive Ep-Condition and the Critical Scuffing Limit for Rolling-sliding
,”
ASME J. Tribol.
,
118
, pp.
125
–
130
.
5.
Bell
,
J. C.
, and
Willemse
,
P. J.
,
1998
, “
Mid-Life Scuffing Failure in Automotive Cam-Follower Contacts
,”
Proc. I. Mech. Engrs
,
212
, pp.
259
–
269
.
6.
Kim
,
K.
, and
Ludema
,
K. C.
,
1995
, “
A Correlation Between Low Cycle Fatigue Properties and Scuffing Properties of 4340 Steel
,”
ASME J. Tribol.
,
117
, pp.
617
–
620
.
7.
Matveevsky
,
R. M.
,
1992
, “
Friction Power as a Criterion of Seizure with Sliding Lubricated Contact
,”
Wear
,
155
, pp.
1
–
5
.
8.
Yang
,
J.
,
Cowan
,
R. S.
, and
Winer
,
W. O.
,
1993
, “
Prediction of Failure Transitions in Sliding Contacts by a Thermomechanical Wear Model
,”
ASME J. Tribol.
,
115
, pp.
432
–
438
.
9.
Horng
,
J. H.
,
1998
, “
True Friction Power Intensity and Scuffing in Sliding Contacts
,”
ASME J. Tribol.
,
120
, pp.
829
–
834
.
10.
Kwasniak
,
E.
,
Pasierski
,
J.
, and
Stupnicki
,
J.
,
1997
, “
Some Remarks Concerning Scuffing of Ceramics Slid Against Stell
,”
Wear
,
209
, pp.
219
–
228
.
11.
Vick
,
B.
,
Furey
,
M.
, and
Iskandar
,
K.
,
2000
, “
Theoretical Surface Temperatures Generated From Sliding Contact of Pure Metallic Elements
,”
Tribol. Int.
,
33
, pp.
265
–
271
.
12.
Meng
,
V. V.
, 1960, “The Investigation of Steel Seizure With Disc Machine,” Friction and Wear of Machines, 14, pp. 222–237.
13.
Dyson
,
A.
,
1975
, “
Scuffing-A Review, Part 1 and Part 2
,”
Tribol. Int.
,
8
, pp.
77
–
87
, 117–122.
14.
Bond-Yen
,
T.
, and
Winer
,
W. O.
,
1989
, “
Friction-Induced Thermal Influences in Elastic Contact Between Spherical Asperities
,”
ASME J. Tribol.
,
111
, pp.
315
–
322
.
15.
Durkee
,
D. B.
, and
Cheng
,
H. S.
,
1980
, “
An Examination of a Possible Mode of Scuffing Failure in Simple Sliding
,”
Wear
,
59
, pp.
223
–
230
.
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