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C. Rajkumar et al.
for the pin is 70 HRA. The measurement of weight loss was used to calculate the
wear rate. The tests were carried out at 20 N and 30 N, respectively. The test has
been performed under room temperature.
3 Results and Discussions
3.1 Wear Analysis—Design of Experiments
Table 3 shows the systems parameters and their levels. The wear tests were performed
using L 16 full factorial design and shown in Table 4. Results reveal that forged steels
have lesser wear rate compared to sintered steels. The reason for this is more ferrite
content in the forged steels. Minitab Statistical Software has been used for all plots and
analysis in this study. Columns are assigned the factors and interactions. Response
Table 5 shows the average characteristics of the individual factor level. The response
Table 3 Process parameters and their levels
Level
Load
Material
Condition
Atmosphere
1
20
DSS-A
Sintering
Partial vacuum
2
30
DSS-B
Forged
Hydrogen
Table 4 Experimental results
Exp. No.
Load (N)
Material
Condition
Atmosphere
Wear rate (mm 3 /m)
1
20
DSS-A
Sintered
Hydrogen
0.044
2
20
DSS-A
Sintered
Partial-Vacuum
0.052
3
20
DSS-A
Forged
Hydrogen
0.065
4
20
DSS-A
Forged
Partial-Vacuum
0.016
5
20
DSS-B
Sintered
Hydrogen
0.037
6
20
DSS-B
Sintered
Partial-Vacuum
0.043
7
20
DSS-B
Forged
Hydrogen
0.040
8
20
DSS-B
Forged
Partial-Vacuum
0.014
9
30
DSS-A
Sintered
Hydrogen
0.051
10
30
DSS-A
Sintered
Partial-Vacuum
0.061
11
30
DSS-A
Forged
Hydrogen
0.076
12
30
DSS-A
Forged
Partial-Vacuum
0.041
13
30
DSS-B
Sintered
Hydrogen
0.042
14
30
DSS-B
Sintered
Partial-Vacuum
0.048
15
30
DSS-B
Forged
Hydrogen
0.014
16
30
DSS-B
Forged
Partial-Vacuum
0.030