Year1
- GH80A高温合板材金：
- 0.5-20mm
- GH80A高温合金圆棒：
- 0.8mm-220mm
It is a high-temperature alloy with nickel-chromium as the matrix and the addition of aluminum and titanium to form phase dispersion strengthening. Except for the slightly higher aluminum content, it has good creep properties and oxidation resistance at similar service temperatures. This alloy has good cold and hot processing properties and is mainly used to manufacture hot-rolled bars, cold-drawn bars, hot-rolled plates, cold-rolled plates, strips, and ring parts for manufacturing parts such as engine rotor blades, guide blade supports, bolts, blade lock plates, etc. []
Material grades
Similar grades
Technical standards of materials
Hot-rolled bars for alloy turbine blades
Alloy hot-rolled, forged and cold-drawn bars
Ring parts Alloy rolled and drawn ring parts
Alloy hot-rolled plates and cold-rolled sheets and strips
Chemical composition
Table
Remainder
Heat treatment system
Blade Use rods for air cooling. Hot rolling, forging and cold drawing of bars shall be carried out in accordance with the provisions of the table. Rolled rings are no larger than water-cooled and air-cooled. Hot-rolled plates and cold-rolled sheets and strips are supplied air-cooled.
Table
Material type
Solution treatment system
Aging system
Hot rolled bars for thermal processing
Air cooling
Air cooling or
Air cooling
Hot rolled bars for thermal processing
Carry out according to the system ① or ②
① The holding time is oil cooling, water cooling or air cooling as specified in the table.
②The heat preservation time should be air-cooled according to the table.
Insulation water cooling
Air cooling or
Air cooling
Cold drawn bar
The insulation time is water cooling or air cooling as specified in the table.
Air cooling or
Air cooling
Table
Diameter
Holding time
Diameter
Holding time
Table
Diameter or larger Small cross-section size
Holding time
Diameter or smaller cross-section size
Holding time
Variety specifications
Blades with diameter ~ should be hot-rolled with hot-rolled bars with a diameter no larger than Or forged bars.
Cold-drawn rods with diameters of ~ round bars and inscribed circle diameters of ~ hexagonal bars.
Rolled parts with high outer diameter and inner diameter.
The thickness of hot-rolled plates is not greater than that of cold-rolled thin plates, and the thickness of cold-rolled strips is not greater than that of cold-rolled strips.
The surface of hot-rolled rods for blades should be completely polished or polished without heat treatment.
Hot-rolled bars for machining are solution treated and descaled.
Cold-drawn bars for upsetting are in the cold-drawn and polished state. Cold-drawn bars for machining are in the cold-drawn state after solution treatment and descaling. Bars for hot processing are in the manufacturing state and descaled.
Rolled rings are in solution treated and rough machined condition.
Hot-rolled plates, cold-rolled plates and strips are softened, alkali-acid washed, trimmed and flattened.
Smelting and casting process
The rods and plates used for blades adopt vacuum induction melting and electroslag remelting process. Rolled ring parts and hot-rolled forged and cold-drawn bars adopt induction melting plus electroslag remelting or vacuum induction plus vacuum arc remelting or vacuum induction melting plus electroslag remelting processes.
Application Overview and Special Requirements
This alloy is mainly used for parts such as engine rotor blades, guide blade support sectors, mounting ring bolts, blade lock plates, etc.
Physical and chemical properties
Thermal properties
Melting temperature range melting point
Thermal conductivity is shown in the table.
Table
/
Linear expansion coefficient is shown in the table
Density
Electrical properties
Room temperature.
Magnetic properties
Non-magnetic
Chemical properties
Oxidation rate of antioxidant properties tested in air medium
Table.
Test time
Oxidation rate/
Microstructure
Transformation temperature
Time temperature microstructure transformation curve
Alloy microstructure blade blanks are processed according to different heat treatment specifications Structural Characteristics During air cooling treatment, the phases in the matrix and some grain boundary carbides are dissolved into solid solution. During the cooling process, chromium-rich carbides form at the grain boundaries. At about the time above, the precipitated cake transforms into ~ at a lower temperature, and the precipitation can also independently nucleate to form grain boundary carbides. Therefore, after air cooling treatment, the grain boundaries show a discontinuous state and there is a phase within the grains.
Process performance and requirements
Forming performance
Forged alloys have good forging properties. The heating temperature of the steel ingot should not be lower than the forging temperature. The stop forging temperature should not be lower than.
The rolling heating temperature of hot rolled plate and the rolling stop temperature should not be lower than.
The weldability alloy can be used for automatic butt argon arc welding and seam welding.
WhatsApp
