Laser processing of cast iron for enhanced erosion resistance

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02644203· OSTI ID:6026658

Chen, C H; Altstetter, C J; Rigsbee, J M

The surfaces of nodular and gray cast iron have been modified by CO/sub 2/ laser processing for enhanced hardness and erosion resistance. Control of the near-surface microstructure was achieved primarily by controlling resolidification of the laser melted layer through variations in laser beam/target interaction time and beam power density. Typical interaction times and power densities used were 5 msec and 500 kW/cm/sup 2/. Two basic kinds of microstructure can be produced-a feathery microstructure with high hardness (up to 1245 HV) and a dendritic microstructure with a metastable, fully austenitic matrix and lower hardness (600 to 800 HV). Erosion testing was done using slurries of SiO/sub 2/ or SiC in water. Weight loss and crater profile measurements were used to evaluate the erosion characteristics of the various microstructures. Both ductile and gray cast iron showed marked improvement in erosion resistance after laser processing.

• Research Organization: Department of Metallurgy and Mining Engineering, University of Illinois at Urbana-Champaign, Urbana, IL
• OSTI ID: 6026658
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 15A:4; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CARBIDES
CARBON COMPOUNDS
CARBON DIOXIDE LASERS
CAST IRON
ELECTROMAGNETIC RADIATION
EROSION
GAS LASERS
HARDENING
HARDNESS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
LASER RADIATION
LASERS
MATERIALS TESTING
MECHANICAL PROPERTIES
RADIATIONS
SURFACE HARDENING
SURFACE TREATMENTS
TARGETS
TESTING
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE