We do a significant amount of 15-5PH stainless steel CNC turning in the 8” to 25” diameter range. Parts are either bar stock or forgings that are usually hockey puck shaped. For OD roughing we use a CNMG 432 Iscar grade IC907 and run it at 325 SFM, 0.1 DOC, 0.01 IPR. Generally, we rotate the insert after 25-45 min of time in cut. All the turning is done in large slant bed lathes with flood coolant.
I am not convinced this is very efficient and think we could achieve a higher surface footage and much longer inserts life. I wanted so see if anyone on this forum had any experience with 15-5 and what kind of SFM and insert life they were able to achieve. Are the numbers we are running reasonable or could we do a lot better? Sandvik rep recommended trying a 4425 grade, I have also heard good things about 2025 and 2220. I plan to buy some samples of these inserts and give them a shot but wanted to get some other opinions.
Any experience or advice would be greatly appreciated. Thanks
I am not convinced this is very efficient and think we could achieve a higher surface footage and much longer inserts life. I wanted so see if anyone on this forum had any experience with 15-5 and what kind of SFM and insert life they were able to achieve. Are the numbers we are running reasonable or could we do a lot better? Sandvik rep recommended trying a 4425 grade, I have also heard good things about 2025 and 2220. I plan to buy some samples of these inserts and give them a shot but wanted to get some other opinions.
Any experience or advice would be greatly appreciated. Thanks