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May 19, 2005
Dr. David Krus
Brush Wellman Inc.
1776 Clair Ave.
Cleveland, Ohio 44110
Re: Evaluation of Toughmet CX105 Sliding Against
Metalife Coated AISI 8620 Steel.
Dear Dave:
We have completed the tests on the Metalife coated samples and
find the results to be
encouraging. Four tests were run on the coating against Toughmet alloy. Two
were journal
bearing tests and two were thrust washer tests. One of each test was run
lubricated and one was
run unlubricated.
Test Conditions
The test conditions were as follows:
Journal Bearing Test, PV Limit Test
Materials - Toughmet CX105 vs
- Case 60 shafting coated with
metalife
Surface Roughness
Bearing - 32.2 to 39.6 u" Ra
Shaft - 12.6 to 15.5 u" Ra
Bearing Size - 1'' OD X 1" long
Contact Area - 1.0 sq. inch (Projected
Area)
Load - 50 psi increments to
failure
Velocity - 100 to 600 ft/min
Lubricant
Test 1 - Dry
Test 2 - Quaker State SAE 10W - HD
Temperature - 72ºF at the start
Rensselaer
Polytechnic Institute
110 8th
Street │Troy, NY 12180-3590 USA |
