NiCr15Fe7TiAl、NC15TNbA、NCF750

NiCr15Fe7TiAl alloy overview

NiCr15Fe7TiAl alloy is mainly nickel-based superalloy which is age-hardened with γ "[Ni3 (Al, Ti, Nb)] phase. It has good corrosion resistance and oxidation resistance below 980 ℃, and has higher resistance below 800 ℃. Strength, good relaxation resistance below 540 ℃, but also good forming and welding properties. This alloy is mainly used to make plane springs that work under 800 ℃ and require high resistance to relaxation, Spiral spring. It can also be used to manufacture turbine turbine blades and other parts. The available varieties are plate, strip, bar, forging, ring, wire and pipe.

 

NiCr15Fe7TiAl Chemical Composition

%	C	Cr	Ni	Al	Ti	Fe	Nb	Co	Mn	Si	S	Cu	P
Min.		14		0.40	2.25	5.0	0.70
Max.	0.08	17	70	1.00	2.75	9.0	1.20	1.0	1.0	0.50	0.010	0.50	0.015

 

NiCr15Fe7TiAl heat treatment system

The solid solution heat treatment system for the supply state of plates, strips and tubes is 980 ° C ± 15 ° C and air-cooled. For the intermediate heat treatment system of materials and parts, the following processes can be selected for heat treatment.

Annealing: 955-1010 ° C, water-cooled.

Annealing before welding: 980 ℃, 1h.

Stress relief annealing of welded parts: 900 ° C, moisture retention for 2h.

Stress relief annealing: 885 ℃ ± 15 ℃, 24h, air cooling.

 

NiCr15Fe7TiAl Variety Specifications and Availability

Can supply a variety of bars, forgings, rings, hot-rolled plates, cold-rolled plates, strips, pipes and wires.

Sheets and strips are generally supplied after hot or cold rolling, annealing or solid solution, pickling and polishing.

Bars, forgings and rings can be supplied in the forged or hot-rolled state; they can also be supplied in solution after forging; bars can be polished after solution or lapping, and can be cold-rolled when required by the order Pull state in place.

Wires can be supplied in a solid solution state; for wire materials with a nominal diameter or thickness below 6.35mm, they can be supplied after solid solution and cold-drawn deformation of 50% to 65%; those with a nominal diameter or side length greater than 6.35mm The wire is supplied in a solution of not less than 30% cold drawing after solution treatment. For wire materials with a nominal diameter or side length not greater than 0.65mm, they are supplied in a cold-drawn deformation of not less than 15% after solution treatment according to requirements.

 

NiCr15Fe7TiAl Melting and Casting Process

The alloy adopts electric arc furnace plus vacuum consumable remelting, vacuum induction plus electroslag, electroslag plus vacuum consumable remelting or vacuum induction plus vacuum consumable remelting.

 

NiCr15Fe7TiAl Application Overview and Special Requirements

This alloy is mainly used to manufacture corrosion-resistant flat wave springs, circumferential coil springs, spiral compression springs, spring clamps and seals, etc. for aircraft engines operating at temperatures below 540 ° C.

 

Special alloy materials commonly used in the energy industry:

Stainless steel: 254SMO, 654SMO, F44, 2205, 2507, etc.

High-temperature alloy: GH4049

Nickel-based alloys: Alloy 59, Hastelloy B, Inconel 718, Nickel 201, Hastelloy C, etc.

Corrosion-resistant alloys: NS333, NS334