Aloha, fun & authoritative answers -- no cost, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Metal finishing Q&As since 1989

-----

Poor adhesion of titanium nitride on carbide inserts

We are manufacturing cutting / forming tools with carbide inserts. After the part is finished we send it for Titanium Nitride coating using PVD system. The problem is that after coating the carbide inserts tend to come off easily. We also manufactured some zigs but still the problem remains. The parts perform extremely well without the coating but the customer requires the titanium nitride coating.

Please suggest.....

Bhupendra Singh
Manager Service / Quality & Finishing - NOIDA, Uttar Pradesh, INDIA
June 28, 2008

It sounds like the braze is failing in the elevated temperature/vacuum of the TiN process. A higher temp braze might be needed. Talk to your braze vendor.

James Watts
- Navarre, Florida
July 1, 2008

I assume you're brazing the inserts to the tool. TiN is done at very high substrate temperatures -- around 450 °C -- so your braze is being compromised. Have the inserts TiN coated before you mount them.

Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover - San Diego,
California
July 2, 2008

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: