Ferro-Titanit Nikrodur: The Key for Successful Pelletizing
Horst Hill, Andreas Mohr, Daniel Kipp
Many applications in the field of tooling require simultaneous resistance to corrosion and wear. Such demands can be met by a martensitic matrix with embedded carbides if they are harder than the acting abrasive particles and of similar size. A further gain in wear resistance can be achieved by the addition of hard phases into the metal matrix to produce a metal matrix composite (MMC). Ferro-Titanit materials from Deutsche Edelstahlwerke belongs to the group of MMCs.
The key for successful pelletizing
As a good example, the machines used for underwater pelletizing needs a simultaneous resistance to corrosion and wear. Coming from an extruder unit the melt flow is directed through boreholes of the so-called die plate. After leaving the boreholes the plastic is cut off by rotating knives which are pressed against the die plate. Afterwards, the pellets will be cooled within the water, discharged, collected and dried. Finally, these pellets are used in die casting machines to produce components made out of plastic.
Figure 1: Pelletizing Unit
The die plate is the heart of the pelletizing machine and has to fulfil three important properties:
- Corrosion resistance → lifetime
- Wear resistance → lifetime
- Thermal conductivity → as low as possible to ensure a high-quality cutting of the pellets and to reduce energy-losses
The new developed and patented material Nikrodur fulfils all of the mentioned requirements and is, therefore, the ideal choice. Based on several tests, Nikrodur shows its strengths in wear resistance, corrosion resistance and thermal conductivity.
All advantages of Nikrodur at a glance
- Longer lifetime of the die plate together with improved pellet quality
- Increased wear resistance up to 50%
- Increased corrosion resistance up to 35%
- Reduced thermal conductivity of 20%
Browse all Ferro-Titanit materials from Deutsche Edelstahlwerke here.
Article by Deutsche Edelstahlwerke (DEW)
Deutsche Edelstahlwerke (DEW) is one of the world’s leading producers and processors of special steel long products and belongs to the Swiss Steel Group. In the three materials groups – engineering steel, tool steel and stainless, acid and heat resistant steel – Deutsche Edelstahlwerke offers international customers a uniquely wide range of product dimensions, from drawn wire with a diameter of 4.5 mm to open-die forgings with a diameter of 1,100 mm. As a partner with technical competence in steel, Deutsche Edelstahlwerke develops innovative, individual special steel solutions for complex high-tech applications and offers services ranging from steelmaking to extensive steel processing and steel finishing.
Four of the best
Deutsche Edelstahlwerke is the leading producer of long high-grade steel products. The products range from drawn wire with a diameter of 5.0 mm all the way to forged products with a diameter of 1100 mm.
This wide product range makes our offering unique in the world and gives our customers a decisive advantage: with us, they can get everything from a single source.
Tool steels
As one of the world's largest producers of tool steel, we supply exactly the steels that our customers need for their individual products, with properties accurately tailored to the respective application.
Stainless, acid and heat-resistant steels
Stainless, acid and heat-resistant steels from Deutsche Edelstahlwerke are always in demand when extreme technical requirements are imposed on the material. Because of their outstanding chemical corrosion and mechanical properties, these steel grades are particularly used in the chemical industry, mechanical engineering, the food processing industry, power engineering, medical equipment, traffic engineering and the offshore sector.
High-grade structural and anti-friction bearing steels
Automotive engineering, mechanical engineering and gearbox construction would today be almost inconceivable without high-grade structural steels and anti-friction bearing steels from Deutsche Edelstahlwerke. Made-to-measure processing and service properties are achieved by precise setting of the chemical composition and by special production and test conditions.
Special materials
Ferro-Titanit is the name of the carbide-alloyed materials of Deutsche Edelstahlwerke produced by powder metallurgy, uniting the properties of steel and cemented carbides.
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Did you know?
The newly developed material Nikrodur offers increased wear resistance up to 50%, increased corrosion resistance up to 35% and reduced thermal conductivity of 20% compared to Nikro 128.