Innovations in alloy metallurgy for furnace rolls and other high temperature applications
- VDM Technologies, Houston, TX (United States)
- Krupp-VDM GmbH, Werdohl (Germany)
For high temperature applications proper alloy selection is important for safety and economic reasons. Since all high temperature materials have certain limitations, the optimum choice is often a compromise between the mechanical property constraints (creep and stress-rupture strength), environmental constraints (resistance to various high temperature degradation phenomena), fabricability characteristics and cost. This paper presents the fundamentals of the role of various alloying elements and the utilization of this knowledge to develop a new high temperature alloy Nicrofer 6025HT, known as alloy 602CA (UNS N06025). This innovative development is characterized by superior creep and stress rupture strength properties up to 1,200 C with excellent resistance to cyclic oxidation, carburization, halogenization and nitridation type attack. This unique combination of strength and high temperature corrosion resistance has led to many applications such as furnace rolls in annealing furnaces, hangers in enamelling furnace, conveyor belts, muffles for bright annealing furnaces and other applications. This paper presents alloy 602CA`s various properties, and some design calculations along with long term experience with this alloy for uncooled furnace rolls and description of its technical and economical advantages over water cooled asbestos rolls currently used in industry.
- OSTI ID:
- 233916
- Report Number(s):
- CONF-950908--; ISBN 0-87170-539-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
ALUMINIUM ALLOYS
CARBON ADDITIONS
CARBURIZATION
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CREEP
EXPERIMENTAL DATA
FURNACES
IRON ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
OXIDATION
SERVICE LIFE
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TITANIUM ADDITIONS
YIELD STRENGTH
YTTRIUM ADDITIONS
ZIRCONIUM ADDITIONS