Effects of Forging Reduction on 120-mm M256 Tube Material

摘要

The purpose of this effort was to investigate the effects of forging reduction onthe resulting mechanical properties developed in gun tube forgings. Experimental forging was performed on a 120-mm gun tube preform in a GFM-55 rotary forging system, where the starting material was machined to a special configuration to provide a range of rotary forging reductions from 1:1 to 5:1. Both the test data and microstructural results of this study showed no significant effect of forging reduction on the resulting properties. These results indicate that forging reduction has little or no effect on the mechanical properties of 120-mm gun tube material. However, the data indicate that the uniformity of properties over the range of forging reductions is due to the superior quality of the material. Electroslag remelted material used to produce 120-mm preforms appears to be capable of maintaining uniform mechanical properties over the range of reductions investigated.