EFFECTS OF COMPOSITION ON THE MECHANICAL PROPERTIES OF NI-CR-MO-CO FILLER METALS.
Abstract
Previous studies to develop maraging-steel experimental HY-180/210 filler metals indicated that aluminum and titanium nonmetallic inclusions may significantly reduce the toughness of maraging steel weld metals. Therefore, a program was initiated to determine the effects of composition on the mechanical properties of Ni-Cr-Mo-Co experimental HY-180/210 weld metals that contained no aluminum or titanium. The effects of carbon (0.02 to 0.30%), nickel (4.0 to 20.0%), chromium (0.0 to 6.0%), molybdenum (0.0 to 6.0%), and cobalt (0.0 to 8.0%) on the mechanical properties of 32 statistically selected Ni-Cr-Mo-Co filler metals (deposited with the TIG process) were evaluated. The results indicated that the microstructures of the Ni-Cr-Mo-Co as-deposited weld metals consisted of martensite and retained austenite (0 to 88%) and that large amounts of retained austenite caused a large loss in weldmetal strength and toughness. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1964
- Accession Number
- AD0456323
Entities
People
- A. M. Rathbone
- B. K. Stewart
- P. J. Konkol
Organizations
- U.S. Steel