Weldability of 10 Nickel Modified Type Steel.
Abstract
Several filler metal heats, melted to a base composition of 14Co-10Ni-2Cr-1Mo-0.16C-bal Fe (AF 1410 steel) with controlled levels of impurity/deoxidizing elements, were evaluated by three arc welding processes. The CW-GTAW deposited weld metal exhibited the best balance between strength and toughness. Maximum fusion zone toughness was associated with low levels of Al, S, and O. A high purity filler metal composition deposited by the CW-GTAW process resulted in post weld aged mechanical properties of TYS-212 Ksi (1462 MPa), TUS-224 Ksi (1544 MPa), CVN absorbed energy - 43.5 ft-lbf (58.9J), and K(ISCC) - 91 KSI square root of (in.) (100 MPA square root of (M)). The post weld aged HAZ notch toughness exceeded 34 ft-lbf (46.1J) absorbed energy at equivalent FZ strength levels for all the arc weld processes evaluated. The as-deposited (last pass) CW-GTAW fusion zone microstructure consisted of dislocated lath martensite, minor quantities of interlath retained austenite, and widmanstatten cementite. Post weld aging of multi-pass weld microstructures led to complete dissolution of cementite platelets in favor of alloy carbide precipitation and large amounts of reverted austenite at lath boundary and intralath sites. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1977
- Accession Number
- ADA043065
Entities
People
- J. C. Collins
- P. M. Machmeier
- R. L. Jones
Organizations
- General Dynamics