What material is NCF750?

NCF750 alloy is mainly used in:'[Ni3(Al, Ti, Nb)] phase aging strengthened nickel-based superalloy, below 980 has good corrosion resistance and oxidation performance, below 800 has high strength, below 540 has good relaxation resistance, but also has good forming properties and welding properties, the alloy is mainly used in the manufacture of aero engines working below 800 and requires high strength corrosion-resistant ring parts, structural parts and bolts and other parts, in 540 The following jobs have medium or low stresses and require plane springs and coil springs that are resistant to relaxation. It can also be used to make parts such as gas turbine turbine blades.

NCF750 heat treatment system.

Solid solution heat treatment system of plate, strip and pipe ** state 980 15, air cooling. For the intermediate heat treatment system of materials and parts, the following processes can be selected for heat treatment.

Annealing: 955 1010, water-cooled.

Annealing of weldments before welding: 980, 1h.

Stress relief annealing of weldments: 900 °C, moisturizing 2h.

Stress relief annealing: 885 15, 24h, air cooled.

NCF750 Varietal Specifications and ** Status.

Various specifications of bars, forgings, rings, hot-rolled plates, cold-rolled plates, strips, pipes and wires are available.

Plates and strips are generally hot or cold rolled, annealed or solution, pickled and polished**.

Bars, forgings and rings can be forged or hot-rolled**; It can also be treated with a solution after forging**; The bar can be melted or polished after solution**, and can be placed in a cold-drawn state when the order requires it.

The filament can be in a solid solution state**; For wires with nominal diameter or thickness below the standard, they can be dissolved and deformed by cold drawing at 50% to 65%**; Wire with nominal diameter or side length is deformed by cold drawing of not less than 30% after solution treatment**. For wires with nominal diameter or side length not larger, they should be deformed by cold drawing of not less than 15% after solution treatment according to requirements**.

NCF750 Melting & Casting Process.

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

NCF750 Application Overview & Special Requirements.

The alloy is mainly used in the manufacture of corrosion-resistant plane wave springs, circumferential coil springs, spiral compression springs, spring clamps and sealing rings and other parts of aero engines with a working temperature below 540.

Category: Corrosion Resistant Heat Resistant Steel.

Standard: JIS G 4901 : Corrosion and heat resistant superalloy bars JIS G 4902 : Corrosion and heat resistant superalloy plates and sheets.

Steel grade: NCF750

c(％)si(％)

mn(％)p(％)

s(％)cr(％)

ni(％)cu(％)

al(％)ti(％)

Fe ( ) Other ( ) NB+TA

Mechanical properties. Conditions: Annealed, 1135 1165 degrees. c minutes.

Rapid cooling, 800 830 degrees. c, keep warm for 24h, cool to air, then temper 690 720, keep warm for 20h.

Tensile strength, b mpa: 960

Yield strength, 620

Elongation, δ (

Area reduction rate, (

Solution annealing hardness (HBW): 320 max.

Applications: NCF750 superalloy is widely used in the production of high-temperature components for gas turbines in the aerospace, marine and industrial sectors, such as turbine blades, guide vanes, turbine discs, high-pressure compressor discs, burners, and energy production. Spacecraft, rocket engines, nuclear reactors, petrochemical equipment, coal to power conversion and other conversion devices.

A type of nickel-based superalloy.

Alloys are mainly made of:"[Ni3(Al, Ti, Nb)] phase aging strengthened nickel-based superalloy has good corrosion resistance and oxidation resistance below 980, high strength below 800, good relaxation resistance below 540, and good forming and welding properties. This alloy is mainly used in the manufacture of plane springs and coil springs that work below 800 degrees and require high strength and relaxation resistance. It can also be used to make parts such as gas turbine turbine blades.

The most popular varieties are plates, strips, bars, forgings, rings, wires and pipes.

Introduction to alloys. Material grade.

nicr15fe7tial（gh145）

Similar grades. Inconel X-750 (USA), NICR15FE7TIAL (Germany), NC15FETNBA (France), NCF750 (Japan).

Technical standards for materials.

Q 3B 4088-1994 "NICR15Fe7Tial Alloy Capillaries".

Q 3B 4098-1995 "NICR15Fe7Tial Alloy Wire".

Q 3B 4198-1993 "NICR15Fe7Tial Alloy Cold Rolled Plates and Strips".

Shanghai Junting's main business: Monel Inconel Incoloy Hastelloy

GH superalloys, cast superalloys, NS corrosion-resistant alloys, J series soft magnetic alloys, Stellite stellite alloys, austenitic stainless steels, duplex stainless steels, precipitation hardening steels, etc.

This is the Japanese standard high-temperature alloy grade, the alloy is mainly based on'[Ni3(Al, Ti, Nb)] phase aging strengthened nickel-based superalloy, below 980 has good corrosion resistance and oxidation performance, below 800 has high strength, below 540 has good relaxation resistance, but also has good forming properties and welding properties, the alloy is mainly used in the manufacture of aero engines working below 800 and requires high strength corrosion-resistant ring parts, structural parts and bolts and other parts, in 540 The following jobs have medium or low stresses and require plane springs and coil springs that are resistant to relaxation. It can also be used to make parts such as gas turbine turbine blades.

For specific information, please refer to the Landong Industrial Information Booklet.

NCF750 is a superalloy steel from South Korea.

1. Grade NCF750 (GH4145) precipitation strengthened nickel-based superalloy.

2. Chemical composition: sulfur S ( nickel Ni ( 70 ) carbon C ( iron Fe ( copper Cu ( aluminum Al( titanium Ti ( manganese mn ( silicon si ( chromium cr (

Three: the scope of application, the field of application:Perennial stock round bar, plate, seamless pipe, tape and reel!

The alloy has good corrosion resistance and creep fracture strength in a high-temperature environment, good mechanical properties, and is widely used, with sufficient strength and corrosion and oxidation resistance below 980.

1.manufacture of springs, bolts that work at high temperatures; rotor blades, impellers and other structural parts on gas turbines;

2.thrust chambers on rocket engines;

3.thrust reversers on aircraft;

4.large high-pressure vessels;

5.Elastomeric air seals, elastomeric sealing molds, rubber mechanical electric heating blades.

Four: physical properties.

Density melting point 1393-1427

The small value of the mechanical properties of the alloy at room temperature:

Alloy tensile strength.

rmn mm2 yield strength.

Elongation. A5% Brinell hardness HB

Solution treatment 1267 868 25 400

Five: Overview. It has good corrosion resistance and oxidation resistance below 980, high strength below 800, good relaxation resistance below 540, good forming and welding properties, and excellent mechanical properties in low temperature environments.