ROTARY ELONGATION OF URANIUM TUBING

摘要

One hundred twenty-eight uranium tubes were rotary elongated successfully on a No. 1 Witter mill at the American Manufacturing Company of Texas (AMCOT), Fort Worth, Texas. The test was performed by the National Lead Company of Ohio on a small, shell-rolling mill which utilized the same three-roll rolling principle now in use in the Asseltype seamless tube mill. Feed stock for the test was supplied by extrusion and by cen¬trifugal casting. Billets were preheated in a gas-fired muffle furnace and were protected by a continuous flow of argon. Evaluations were made of billet preheat temperature, mandrel heating, roll cooling, roll design, roll speed, feed angle, grain structure, and type of feed-stock. Slippage problems encountered in previous tests were corrected by roll design modifications, a reduction in roll rotational speed, and an increase in feed angle.