Jan 21 2013
Topics Covered
IntroductionPhysical PropertiesFabrication and Heat Treatment Annealing Cold Working Welding Forging Forming Machinability Aging Heat TreatmentApplications
Introduction
Super alloys or high performance alloys are available in a variety of shapes and contain elements in different combinations to obtain a specific result. These alloys are of three types that include iron-based, cobalt-based and nickel-based alloys.
Super alloys have good oxidation and creep resistance and can be strengthened by precipitation hardening, solid-solution hardening and work hardening methods. They can also function under high mechanical stress and high temperatures and also in places that require high surface stability.
The following datasheet provides an overview of Udimet 710™.
Physical Properties
The following table shows the physical properties of Udimet 710™.
| Properties |
Metric |
Imperial |
| Density |
8.276 g/cm³ |
0.299 lb/in³ |
| Melting point |
1371°C |
2500°F |
Fabrication and Heat Treatment
Annealing
Udimet 710™ is annealed at 1177°C (2150°F) and then cooled in air in a rapid manner.
Cold Working
Standard tooling methods are used for cold working Udimet 710™. Usage of plain carbon steels is not recommended as they may produce galling. Galling can be reduced by the usage of soft die materials and heavy duty lubricants. Tooling is recommended in the cold working process to allow liberal radii and clearances.
Welding
Welding processes recommended for Udimet 710™ include gas-tungsten arc welding, gas metal-arc welding and shielded metal-arc welding. Submerged-arc welding is not recommended as cracks may develop due to the high heat input. This alloy can be welded by the commonly used welding procedures and tThe welding surfaces should be free from paint, crayon markings or oil.
Forging
Udimet 710™ is capable of being forged as it is ductile.
Forming
Conventional methods can be used to form Udimet 400™ with ease as it has good ductility. Usage of heavy-duty lubricants is recommended during the cold forming process of this alloy. After the forming process all traces of the lubricant should be cleaned to prevent embrittlement of this alloy at high temperatures.
Machinability
Udimet 710™ can be machined by conventional machining methods. and tThis alloy contains higher strength, gumminess and work-hardening qualities. Usage of water-based coolants is preferred for milling, turning or grinding. Usage of heavy lubricants is preferred for boring, drilling, broaching or tapping operations. Work-hardening of the alloy before the cutting process and chatter can be minimized by tooling and a heavy- duty machining equipment.
Aging
Udimet 710™ is treated under four different temperatures to be air-hardened.
- Heat for 4 h at 1177°C (2150°F) and cool in air.
- Heat for 4 h at 1079°C (1975F) and cool in air.
- Heat for 24 h at 843°C (1550°F) and cool in air.
- Heat for 16 h at 760°C (1400°F) and coo in air.
Heat Treatment
Udimet 710™ can be age-hardened and annealed by heat treatment.
Applications
Udimet 710™ is used in hot section components and gas turbines.