Accession Number : AD0889335

Title :   Manufacturing Methods and Technology Study for Fabrication of Small-Diameter Missile Motor Cases.

Descriptive Note : Final rept. Jun 69-Dec 70,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH

Personal Author(s) : Gegel, G. A. ; Byrer, T. G. ; Monroe, R. E. ; Fiorentino, R. J.

Report Date : MAR 1971

Pagination or Media Count : 171

Abstract : Based on technical feasibility and estimated cost of production, two improved fabrication methods were selected for study during the manufacture and testing phase of the program: (1) form-and-weld, and (2) hydrostatic extrusion. These processes were evaluated by defining and conducting critical experiments to verify the feasibility of using these approaches to fabricate thin-wall, small-diameter motor cases from 250 grade maraging steel. While the results of the critical experiments demonstrated that both approaches are technically feasible, the hydrostatic extrusion approach was selected for fabrication of test motor-cases because of its greater process versatility and ability to fabricate both separate and integral-head configurations. In the prototype fabrication trials, both open-end and integral head cases were extruded by hydrostatic extrusion techniques. The results verified the process conditions that were originally estimated indicating that costs savings of as much as 50% could be realized over present motor case manufacturing methods. (Author)

Descriptors :   (*ROCKET ENGINE CASES, MANUFACTURING), SOLID PROPELLANT ROCKET ENGINES, MARAGING STEELS, EXTRUSION, MECHANICAL WORKING, ROCKET COMPONENTS, WELDING.

Subject Categories : Fabrication Metallurgy
      Rockets

Distribution Statement : APPROVED FOR PUBLIC RELEASE