Process Parameters for Banding 155-mm M483A1 Projectiles in High-Capacity Inertia Welding Machine.
Abstract
Chamberlain defined production process parameters for inertia welding rotating bands to 155-mm M483A1 Projectiles on the high-capacity inertia welder at the Company's New Bedford Division. To reduce disbond at the weld interface, oxidation and impurity levels must be minimized. Long exposure times were found deleterious to weld quality. Ultrasonic scanning indicated that projectiles with poorly bonded rotating bands will show a greater degree of disbond after heat treatment; projectiles with well-bonded bands are not adversely affected by heat treatment. The band and band seat geometry were studied to determine the reasons for poor bonding along the forward edge of the inertia welded rotating band. Inertia welding rotating bands using various lubricants and coatings was studied to determine the effects on tooling and weld quality. An intensive metallurgical examination of the rotating band-projectile body interface was conducted by analyzing microstructure, microhardness, and electron microprobe data. 20 each abrasion-cleaned and heat-treated M483A1 The projectiles were fired to determine and correlation between rotating band damage and deviation from the projectile's desired impact point. The dynamic performance of these projectiles was equal to that of 40 control projectiles with overlay welded bands.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA121268
Entities
People
- J. Arthur Ytterhus