NOREM wear-resistant, iron-based hard-facing alloys: Final report

Technical Report · Sat Jul 01 00:00:00 EDT 1989

OSTI ID:5983948

Grobner, P; Ohriner, E K; Wada, T; Whelan, E P

Wear-resistance cobalt-free hardfacing alloys are needed to replace the cobalt-base alloys used to hardface nuclear valves in order to reduce the exposure of maintenance personnel. Some thirty heats of cast iron-base alloys were prepared and characterized. Selected heats were prepared and applied as hardfacing overlays on austenitic steel substrates using both GTA and PTA welding processes. Some of the iron-base alloys exhibited galling wear resistance as high as that of cobalt-base standards both in the cast condition and in the PTA overlays. Hardness, mechanical properties, and galling wear resistance were determined on weld overlays and on cast alloys. Dilution and thermal expansivity were determined for weld overlays. X-ray diffraction and scanning electron microscopy were used to determine the alloys' microstructures. Other commercially available alloys were tested for galling wear resistance and compared to iron-base alloys. 7 refs., 2 figs., 2 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); AMAX Research and Development Center, Golden, CO (USA)
• OSTI ID: 5983948
• Report Number(s): EPRI-NP-6466-M
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
36 MATERIALS SCIENCE
CHROMIUM ALLOYS
WEAR RESISTANCE
IRON BASE ALLOYS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NUCLEAR POWER PLANTS
VALVES
CARBIDES
CASTING
COBALT BASE ALLOYS
DENSITY
DESTRUCTIVE TESTING
GAS TUNGSTEN-ARC WELDING
MAINTENANCE
MECHANICAL PROPERTIES
MICROSTRUCTURE
PROGRESS REPORT
WELDABILITY
ALLOYS
ARC WELDING
CARBON COMPOUNDS
COBALT ALLOYS
CONTROL EQUIPMENT
CRYSTAL STRUCTURE
DOCUMENT TYPES
EQUIPMENT
FABRICATION
FLOW REGULATORS
IRON ALLOYS
JOINING
MATERIALS TESTING
NUCLEAR FACILITIES
PHYSICAL PROPERTIES
POWER PLANTS
TESTING
THERMAL POWER PLANTS
WELDING
220200* - Nuclear Reactor Technology- Components & Accessories
360105 - Metals & Alloys- Corrosion & Erosion
360103 - Metals & Alloys- Mechanical Properties
360104 - Metals & Alloys- Physical Properties