WB Publishes about Hauzer Tool Coating Technology
The German magazine Werkstatt+Betrieb asked Hauzer to write an article about state-of-the-art tool coating technology. They published the article in their February 2014 edition.
Weight reduction in the automotive and aerospace industry encourages a change of material choice. Materials such as aluminium and carbon reinforced plastics are difficult to machine, which requires solutions from the precision tool industry. Coatings can offer solutions for these challenges, especailly hydrogen-free diamond like carbon (DLC) coatings, such as ta-C.
The ta-C coating is deposited in a circular arc process. The coating is characterized by high hardness (4000-7000 HV), generally a thickness of less than 1 µm and a friction coefficient between 0.02 and 0.1 versus dry Al2O3. The deposition temperature range will be between 80 and 200 degrees Celsius, whereas the operating temperature can exceed 500 degrees. The coating has a typical rainbow colour. The low sticking effect of the coating prevents a built-up edge on the tool and therefore keeps the cutting edge sharp for a longer period of time.
For the tool market, ta-C is not the only recent innovation. For nitride coatings Hauzer developed CARC+ technology. One of the features of the new CARC+ technology is speed; one batch has a cycle time of less than four hours. Additionally, optimized heating and cooling techniques add to an improved total cost of ownership. Due to extremely high target utilization, the target costs per year can be decreased with up to 10,000 euro (depending on material). Furthermore, CARC+ improves the smoothness of the coatings considerably, which is the reason for superior lifetime of the tools.
The full article in German from Werkstatt+Betrieb can be downloaded here.