“ A revolutionary new surface treatment is now available to dramatically improve the performance and tool life of Die Cast Tooling, Injection Molds, Hot Form Tools and Stamping Dies up to 10 times longer than PVD and CVD and Diamond coatings.
This new technology represents a joint venture between Dynamic Surface Technologies (formerly Dynamic Metal Treating), a Michigan Corporation with over 25 years experience in surface treating and HARD Technologies Pty Ltd of Australia, a metallurgical based R&D facility. This process represents years of research, testing, and real life case studies.
This unique new technology represents a significant improvement over existing coating technology by diffusing a hard Chromium Carbonitride Layer into the steel at low temperature. Surface wear and corrosion resistance are greatly enhanced compared to PVD as well as eliminating softening and distortion of the tooling typically experienced with CVD coatings. The DYNA-MAX process has significantly improved tool life compared to Chromium, Titanium and TIALN coatings by as much as 4 times.
The DYNA-MAX process is a duplex diffusion process incorporating the DYNA-BLUE process with a low temperature (575C) Chromium Carbonitride deposition layer that does not soften the hardened steel matrix like CVD coatings. It also alleviates flaking, peeling, and delamination associated with PVD coatings. The DYNA-BLUE layer acts as a catalyst to diffuse the Chromium into the steel and also provides excellent support for the extremely hard (1520 Vickers) surface.
The combination of two surface techniques is commonly referred to as “duplex surface engineering”. This new development has combined the DYNA-BLUE process with a low temperature (575ºC) chromium thermo reactive deposition layer. This duplex process forms a hard chromium carbonitride surface layer that is diffused into the steel. This process is accomplished via a diffusion alloying reaction between the nitrogen from the nitrocarburized layer and the deposited chromium metal (6). The low temperature used does not soften the hardened steel matrix. Because the DST-Cr process forms a Chromium, Titanium, etc layer that is diffused into the surface that alleviates flaking, peeling, and delamination associated with PVD coatings. Titanium Nitride, Chromium Nitride, Chromium Carbide, are coatings that are deposited on the surface with no support or metallurgical bond. When the substrate goes into “plastic deformation or deflection” the hard coating flakes off. With the DST-Cr Process, support is provided with the Ferritic Nitrocarburizing process beneath the extremely hard surface.
Vickers hardness testing was conducted using a load of 10µN on the surface layer and a 25 g load beneath the surface layer to the core. The surface layer was determined to be 1520 Hv and a diffusion zone from 1050 to 650 Hv. This also revealed that the nitrocarburized diffusion layer was retained after the DST-Cr process with a gradual hardness transition down to the core. This deep diffusion layer provides good support for the hard Chromium layer. It is also evident that the original core hardness of the H-13 steel was maintained.
A tool performance study was done by a die cast facility (Mercury Marine) to provide real life test data of Ferritic Nitrocarburizing, DST-Cr and a PVD Chromium Nitride processes. This test revealed that the DST-Cr process had the greatest increase in tool life. The test tool was a die cast core located near an end gate with an extreme amount of wear. The FNC process yielded 10,000 shots, while the DYNA-MAX Cr yielded 59,425. The typical life for PVD Chromium Nitride was 18,000 shots.