GH4169 (GH169) high-temperature alloys processed with carbide cutting tools,
GH4169 alloy is a body-centered tetragonal γ "and face-centered cubic γ ′ phase precipitation-strengthened nickel-based high-temperature alloys in the temperature range of -253 ~ 700 ℃ has a good all-around performance, 650 ℃ below the yield strength of the deformation of the high-temperature alloy of the first place, and has a good Fatigue, radiation, oxidation, corrosion resistance, as well as good processing performance, welding performance and long-term organizational stability, able to manufacture a variety of complex shaped parts, in the aerospace, nuclear energy, petroleum industry, in the above temperature range has gained a very wide range of applications.
The alloy is another feature of the alloy organization is particularly sensitive to the thermal processing technology, mastery of the alloy in the phase precipitation and dissolution of the law and the organization of the process, the performance of the interrelationship between the different requirements for the use of the development of a reasonable, feasible process procedures, you can get to meet the requirements of different levels of strength and use of a variety of parts. The varieties supplied are forging, forging bar, rolling bar, cold-rolled bar, round cake, ring, plate, strip, wire, tube and so on. Can be made into disks, rings, blades, shafts, fasteners and elastic elements, plate structures, magazines and other parts in the aviation long-term use.
GH4169 material grade GH4169 (GH169)
GH4169 similar grades Inconel 718 (U.S.), NC19FeNb (France)
GH4169 material technical standards
GJB 2612-1996 "Welding of high-temperature alloys for cold-drawn wire specification"
HB 612-1996 "Welding of cold-drawn wire"
HB 612-1996 "welding of high temperature alloys for cold-drawn wire specification"
HB 612-1996 "welding of high temperature alloys for cold-drawn wire specification"
HB 6702-1993 GH4169 Alloy Bars for WZ8 Series
GJB 3165 Specification for Hot-Rolled and Forged Bars of High-Temperature Alloys for Aerospace Load-bearing Parts
GJB 1952 Specification for Cold-Rolled Sheets of High-Temperature Alloys for Aerospace Applications
GJB 1953 Specification for Hot-Rolled Bars of High-Temperature Alloys for Aircraft Engine Rotating Parts
GJB 1953 Specification for Hot-Rolled Bars of High-Temperature Alloys for Aerospace Engine Rotating Parts
GJB 3317 Specification for Hot-Rolled Sheets of High-Temperature Alloys for Aeronautical Use
GJB 2297 Specification for Cold-Drawn (Rolled) Seamless Tubes of High-Temperature Alloys for Aeronautical Use
GJB 3020 Specification for Ring Blanks of High-Temperature Alloys for Aeronautical Use
GJB 3167 Specification for Cold-Rolled Sheet of High-Temperature Alloys for Aeronautical Use
GJB 3318 Specification for High-temperature Alloy Cold-rolled Strip for Aviation
GJB 2611 Specification for High-temperature Alloy Cold-drawn Bars for Aviation
YB/T5247 Specification for High-temperature Alloy Cold-drawn Wire for Welding
YB/T5249 Specification for High-temperature Alloy Cold-drawn Wire for Cold Heading
GB/T14997 High-temperature Alloy Wrought Round Cake
GB/T14998 High-temperature Alloy Billet Gross Bad
GB/T14992 High-temperature Alloys and Intermetallic Compounds High-temperature Material Classification and Grades
HB 5199 High-temperature Alloys Cold-rolled Sheet and Plate for Aeronautics
HB 5199 High-temperature Alloys Cold-rolled Sheet and Plate for Aviation Thin Plate"
HB 5198 "Deformed High-temperature Alloy Bars for Aeronautical Blades"
HB 5189 "Deformed High-temperature Alloy Bars for Aeronautical Blades"
HB 6072 "GH4169 Alloy Bars for WZ8 Series"
GH4169 Chemical Composition: %
C P S Mn Si Ni Cr Cu Al Co Mo Ti Nb Fe
≤0.08 ≤0.015 ≤0.02 ≤0.35 ≤0.35 50.0~55.0 17.0~21.0 ≤0.30 0.20~0.80 ≤1.00 2.80~3.30 0.65~1.15 4.75~5.50 Remaining balance
Remaining balance of the alloy's chemical composition is divided into 3 categories: standard composition, high quality composition, high purity composition. High-quality components in the standard composition on the basis of carbon reduction and niobium increase, thereby reducing the number of niobium carbide, reducing the fatigue source and increase the number of reinforcing phases, to improve the fatigue resistance and strength of the material. At the same time, the content of harmful impurities and gases is reduced. High purity composition is to reduce the content of sulfur and harmful impurities on the basis of high-quality standards to improve material purity and comprehensive performance.
GH4169 alloy for nuclear energy applications, need to control the boron content (other elements of the composition remains unchanged), the specific content by the supply and demand sides to determine the negotiation.
When ω (B) ≤ 0.002%, in order to differentiate from the GH4169 alloy for the aerospace industry, the alloy grade GH4169A.
GH4169 heat treatment system
The alloy has different heat treatment regimes in order to control the grain size, control the δ-phase morphology, distribution and quantity, in order to get different levels of
mechanical properties. Alloy heat treatment system is divided into 3 categories:
Ⅰ: (1010 ~ 1065)℃ ± 10 ℃, 1h, oil cooling, air cooling or water cooling +720 ℃ ± 5 ℃, 8h, to 50 ℃ / h furnace cooling to 620 ℃ ± 5 ℃, 8h, air cooling.
Treated by this system of material grain coarsening, grain boundaries and intragranular are no δ-phase, the existence of notch sensitivity, but to improve the impact performance and resistance to low-temperature hydrogen embrittlement favorable.
II: (950 ~ 980)℃ ± 10 ℃, 1h, oil cooling, air-cooled or water-cooled +720 ℃ ± 5 ℃, 8h, 50 ℃ / h furnace cooling to 620 ℃ ± 5 ℃, 8h, air-cooled.
The material treated by this system has δ-phase, which is conducive to the elimination of notch sensitivity, is the most commonly used heat treatment system, also known as the standard heat treatment system.
III: 720 ° C ± 5 ° C, 8h, 50 ° C / h furnace cooling to 620 ° C ± 5 ° C, 8h, air cooling.
Treated by this system, the material in the δ-phase is less, can improve the strength and impact properties of the material. This system is also known as direct aging heat treatment system.
GH4169 varieties and specifications and supply status
Can supply die forging (disk, integral forging), cake, ring, bar (forging bar, rolling bar, cold-drawn bar), plate, wire, belt, pipe, different shapes and sizes of fasteners, elastic components, etc., the delivery status is agreed upon by the supply and demand sides. The delivery status is agreed upon by both the supplier and the buyer. The wire material is delivered in disk form with the agreed delivery status.
GH4169 melting and casting process
The smelting process of the alloy is divided into three categories: vacuum induction plus electroslag remelting; vacuum induction plus vacuum arc remelting; vacuum induction plus electroslag remelting plus vacuum arc remelting. The required smelting process can be selected according to the usage requirements of the parts to meet the application requirements.