The influence of laser surface transformation hardening on the sliding wear characteristics and mechanisms of ASTM class-40 gray and 80-55-06 ductile cast irons was investigated. A 1.2 kw, continuous wave, CO2 gas laser was employed to scan the beam successively across the surfaces of cast irons to generate hardened and tempered layers with various case depths. A pin-on-disk wear test system was then used to study the wear behavior as functions of case depth, microstructure, hardness, and surface roughness. As expected, a dramatic improvement in resistance to scuffing and sliding wear was obtained. However, the most significant result was the occurrence of negligible oxidational wear for a load range that increased with an increase in case depth. Resistance to mild and severe wear, mild-to-severe wear transition load, and frictional heating were increased with an increase in case depth. Analysis of worn surfaces and wear debris revealed that negligible oxidational wear in laser-hardened irons is due to two mechanisms: oxidation and adhesion of oxide to the substrate. In contrast, the mild oxidational wear of untreated irons occurs through the formation of loose oxide debris. The mechanisms of severe wear were plastic deformation, delamination, and adhesion; the rate process was controlled by adhesion for laser hardened irons and delamination for untreated irons.
Skip Nav Destination
Article navigation
July 1986
Research Papers
Wear Behavior of Laser Surface-Hardened Gray and Ductile Cast Irons: Part 1—Sliding Wear
P. A. Molian,
P. A. Molian
Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011
Search for other works by this author on:
Mark Baldwin
Mark Baldwin
Iowa Laser Technology Inc., Cedar Falls, Iowa 50613
Search for other works by this author on:
P. A. Molian
Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011
Mark Baldwin
Iowa Laser Technology Inc., Cedar Falls, Iowa 50613
J. Tribol. Jul 1986, 108(3): 326-333 (8 pages)
Published Online: July 1, 1986
Article history
Received:
July 26, 1985
Online:
October 29, 2009
Citation
Molian, P. A., and Baldwin, M. (July 1, 1986). "Wear Behavior of Laser Surface-Hardened Gray and Ductile Cast Irons: Part 1—Sliding Wear." ASME. J. Tribol. July 1986; 108(3): 326–333. https://doi.org/10.1115/1.3261187
Download citation file:
Get Email Alerts
Reviewer’s Recognition
J. Tribol (April 2025)
Tribological Evaluation of Coatings in Fuel Environments
J. Tribol (July 2025)
Related Articles
Fatigue Characteristics of Laser Surface-Hardened Cast Irons
J. Eng. Mater. Technol (July,1987)
Effects of CO 2 Laser Surface Hardening in the Unlubricated Wear of Ductile Cast Iron Against Alumina
J. Tribol (October,1996)
Delamination Wear of Dispersion-Hardened Alloys
J. Eng. Ind (May,1977)
Wear Behavior of Laser Surface-Hardened Gray and Ductile Cast Irons. Part 2—Erosive Wear
J. Tribol (July,1988)
Related Proceedings Papers
Related Chapters
Surface Analysis and Tools
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Estimation of K Ic from Slow Bend Precracked Charpy Specimen Strength Ratios
Developments in Fracture Mechanics Test Methods Standardization