drilling through boron alloyed steel.

[racinfarmer]

28 minutes ago, Carlos Danger said:

Titanium is tough but it ain't Hastaloy.  Most of the disks in the hot section of a jet are hastaloy x. We had an engine have a catastrophic failure where at full power the main shaft split and the disk went through the case and the enclosure and when it got outside it almost sliced a Honda accord in half and then took off up the hill next to the plant where it went through a chain link fence.  The Disk was scrap but it was in remarkably good shape considering what it had been through.   

We end up machining a lot of titanium (and SST and Tantalum and Nitinol) for Med Device at work, but also machine a lot of the super alloys for various aerospace applications too. 

I'd have to look to find out the exact grades but Inconel, Waspalloy Hastalloy, Monel, something called Nimonic, etc.

Some of them just scream on the machines.  

 

[Doug]

3 minutes ago, racinfarmer said:

We end up machining a lot of titanium (and SST and Tantalum and Nitinol) for Med Device at work, but also machine a lot of the super alloys for various aerospace applications too. 

I'd have to look to find out the exact grades but Inconel, Waspalloy Hastalloy, Monel, something called Nimonic, etc.

Some of them just scream on the machines.  

 

What size hole is he trying to put in?  If it's a large dia could use a core bore with a mag drill and replaceable inserts.  If it's a small dia there's some drills called "Hotshots" that we would use to drill AR materials but you need high RPM and no coolant.  Not really applicable for hand drilling.

[Carlos Danger]

9 minutes ago, racinfarmer said:

We end up machining a lot of titanium (and SST and Tantalum and Nitinol) for Med Device at work, but also machine a lot of the super alloys for various aerospace applications too. 

I'd have to look to find out the exact grades but Inconel, Waspalloy Hastalloy, Monel, something called Nimonic, etc.

Some of them just scream on the machines.  

 

the way insert cutters have gone in the past decade there is very few metals that cause machines troubles anymore. even some of the proprietary metals that Pratt has can be machined.  

[Doug]

5 minutes ago, Carlos Danger said:

the way insert cutters have gone in the past decade there is very few metals that cause machines troubles anymore. even some of the proprietary metals that Pratt has can be machined.  

We've machined a number of AR materials.  The ones we have problems with if they had kevlar backing on them.  Once you hit the kevlar it would gum up on the cutter and take cutting edge off the cutter.