Tonytn36
Diamond
- Joined
- Dec 23, 2007
- Location
- Southeastern US
So.... Hello. Long time no post. I have been away from the board for a while. As many may remember, I was working on transferring product southward. That work is now almost complete and since last June I have been transitioning into the steel machining side of things. Lots of work to do and a considerable amount of learning also.
However, that is not the topic of this post.
We have two forging suppliers, the material specifications are the same for both, but from material properties investigations, there are considerable differences in the two, although both are within the specifications. We have lots of issues with chipping inserts with one supplier and the investigation has found long bainite inclusions and particles >500 microns in size in the material. This was there prior to forging as the bands of bainite flow with the forging shape. Bainite is not found in any significance in the other forging supplier parts.
Has anyone dealt with this before and have you found a reliable carbide grade to handle it? Our steel is a Cr-Mo alloy and seems to respond better to grades and coatings typically used for stainless steels from my experiments and testing so far.
Appreciate any information you can share.
However, that is not the topic of this post.
We have two forging suppliers, the material specifications are the same for both, but from material properties investigations, there are considerable differences in the two, although both are within the specifications. We have lots of issues with chipping inserts with one supplier and the investigation has found long bainite inclusions and particles >500 microns in size in the material. This was there prior to forging as the bands of bainite flow with the forging shape. Bainite is not found in any significance in the other forging supplier parts.
Has anyone dealt with this before and have you found a reliable carbide grade to handle it? Our steel is a Cr-Mo alloy and seems to respond better to grades and coatings typically used for stainless steels from my experiments and testing so far.
Appreciate any information you can share.