The deep cryogenic treatment of 8% cobalt end mills has made dramatic improvements in two important ways:
1. The number of milling cuts per re-sharpening was increased from 3 cuts before deep cryogenic processing to 78 cuts after processing, an increase of 26 TIMES the wear life.
2. Re-sharpening the end mills after deep cryogenic treatment required only 1/3 the amount of stock removal to restore the tool geometry.
An Industrial Contractor of Phoenix does sub-contract production for the aerospace industry and is constantly challenged by machining exotic Hi-Nickel alloys. This application required milling of Waspaloy AMS-5706. Each pass produced a flat 1 1/8’ by 1 1/4’. The end mills are M-42 Standard 8% Cobalt. A cost analysis shows the cost per part before and after deep cryogenic treatment.
COSTS | BEFORE TREATMENT | AFTER TREATMENT |
---|---|---|
Tool Replacement Cost | $14.72 | $4.91 |
Tool Re-sharpening Cost | $28.00 | $4.00 |
Lost Time Cost | $12.00 | $0.80 |
Cryogenic Treatment Cost | – | $2.45 |
TOTAL TOOLING COST | $54.72 | $12.16 |
TOTAL SAVINGS PER PART | – | $42.56 |