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GH3039
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China grade: GH3039 nickel-based superalloy
Overview of GH3039 Nickel-based Superalloy
Gh3039 is a single phase austenite solid solution strengthened alloy. It has moderate thermal strength and good thermal fatigue performance below 800 ℃, and good oxidation resistance below 1000 ℃. The structure is stable, the cold formability is good, and the weldability is good. It is suitable for long-term use of aero engine combustion chamber and afterburner parts below 850 ℃. The alloy can be used for plates, bars, wires, tubes and forgings.
Gh3039 material grade: Gh3039(GH39)
GH3039 material technical standards:
GH3039 Chemical Composition
C≤ Si≤ Mn≤ P≤ S≤ Cr≥ Ni≥ Mo≥ With 0.08 0.80 0.40 0.020 0.012 19.0-22.0 Allowance 1.80-2.30 Other N≤ Al≤ Ti≤ Fe≤ Co≤ V≤ W≤ Nb≤ - 0.35-0.75 0.35-0.75 3.00 - - - 0.90-1.30 Note: 1) Cerium is allowed in the alloy.
In the alloy, ω(Cu)= 0.20%.
Gh3039 heat treatment system: hot rolled and cold rolled strip solid solution treatment: 1050~1090 ℃, air cooling. Solid solution treatment of rod and tube: 1050~1080 ℃, air cooling or water cooling.
Gh3039 varieties and specifications and availability: can supply various specifications of hot rolled plate, cold rolled plate, strip, bar, wire, pipe, forging. Plates, strips and pipes shall be delivered after solid solution treatment and pickling. Wire without heat treatment or without heat treatment during wire feeding.
Gh3039 melting and casting process: electric arc furnace melting, electric arc furnace or non-vacuum induction furnace plus electroslag remelting or vacuum arc remelting, vacuum induction furnace plus electroslag or vacuum arc remelting process.
The purpose and special requirements of Gh3039: The aero-engine combustion chamber and afterburner parts made of the alloy material have been tested for a long time and have good performance.
Physical and chemical properties of Gh3039
● Gh3039 thermal performance
Gh3039 Thermal conductivity
θ/℃ 100 200 300 400 500 600 700 800 900 λ/（W/（m·℃）） 13.8 15.5 17.2 18.8 20.5 21.8 23.4 25.1 26.8 ● GH3039 specific heat capacity
θ/℃ 150 200 300 400 500 600 700 800 c/(J/(kg.K)) 544 574 636 645 762 779 921 1047 ● GH3039 coefficient of linear expansion
θ/℃ 20-100 20-200 20-300 20-400 20-500 20-600 20-700 20-800 20-900 20-1000 α/10-6 ℃-1 11.5 12.4 13.2 13.5 13.8 14.3 14.9 15.3 15.8 16.4 Density of GH3039: ρ = 8.3g/cm³. Three. Electrical properties of gh3039: room temperature resistivity ρ = 1.18 × 10-6 Ω · M.
GH3039 magnetic properties: non magnetic alloy.
Chemical properties of GH3039: Oxidation resistance of GH3039: Oxidation rate of GH3039 and GH3039 in air medium after 100h
θ/℃ 900 1000 1100 1200 Oxidation rate/(g/(m2 · h)) 0.074 0.251 0.535 1.061 θ/℃ 900 1000 1100 Oxidation depth along grain boundary/mm 0.020 0.052 0.068 GH3039 mechanical properties: GH3039 technical standard mechanical properties
Standard No. Variety room temperature tensile properties Tensile property at 800 ℃ Kb/MPa D5/% φ/% Kb/MPa D5/% φ/% GJB1952-1994 cold rolled sheet 735 40 - 245 40 - GJB2297-1995 Aviation pipe 685 ① 40 (a) - 245 40 - GJB3165-1998 Bars 735 40 - 245 40 40 GJB3317-1998 hot rolled plate 735 40 45 245 40 50 GJB3318-1998 cold-rolled strip 735 ② 40 (a) - - - - GB/T15062-1994 General use pipe 635 35 - - - - Note: ① Outer diameter> 30mm, wall thickness> 3.0mm, tube temperature σB≥ 635mpa,δ5 ≥ 30%. ② δ≤ 0.25mm strip room temperature σB is greater than 660mpa, measured δ5.
Gh3039 Organizational Structure
Phase transition temperature of Gh3039
Time-temperature tissue transition curve of Gh3039
The microstructure of Gh3039 alloy is as follows
(1) The solid solution state of Gh3039 alloy is single-phase austenite, containing a small amount of Ti(CN), NBC and m32C6 carbides. After long-term aging or service at 600-900 ℃, M32C6 carbides precipitate. The carbides precipitated after aging at 600~700 ℃ are fine and uniform, distributed in grain boundaries and grain boundaries. When the aging temperature is higher than 700 ℃, they mainly precipitate and aggregate along the grain boundary. The phases formed in the alloy are stable and harmful.
(2) According to the national standard, the specification of grade 3038 cold-rolled steel plate is grade 3038.
Process performance and requirements of Gh3039
● Gh3039 molding performance
Gh3039 forging: The alloy has good hot working technology, plasticity and good deformation properties. The forging heating temperature is 1170~1190 ℃, the final forging temperature is not less than 900 ℃, and the primary heating deformation is 50%.
2Gh3039 rolling: the original rolling temperature is 1100~1140 ℃, the final rolling temperature is 1050~1100 ℃, and the final rolling temperature is not less than 850 ℃. When the alloy is rolled by electroslag or vacuum consumable remelting, the final rolling temperature should be slightly lower than that of the alloy melted in the electric arc furnace. The deformation of the hot-rolled pass shall not be less than 13%, and the cold-rolled deformation of the sheet shall be 30% ~ 55%.
● Gh3039 stamping performance: the sheet has good stamping habits in the supply state. The stamping limit coefficient is shown in Table 5-1, and the general working coefficient is 80%-90% of the limit coefficient. In the supply state, the bending fracture times are 20~29 times, and the cupping test depth is 10.7~12.0mm. After deep drawing of δ8.5mm hot-rolled medium and heavy plate, intermediate solid solution treatment (no more than 12h) should be carried out immediately to eliminate stress.
ultimate deep drawing coefficient Limit flanging coefficient Ultimate pressure socket coefficient Minimum bending radius Flat head male mold Ball head male mold 2.10～2.14 1.85～2.00 0.30～0.33 0.45～0.53 18 GH3039 Varieties, Specifications and Availability
Variety classification: Danyang Xinmao alloy can produce various specifications of gh3039 seamless steel pipe, gh3039 steel plate, gh3039 round steel, gh3039 forging, gh3039 flange, gh3039 ring, gh3039 welded pipe, gh3039 steel strip, gh3039 wire and gh3039 matching welding materials.
Delivery status: seamless steel pipe: solution + acid white, length can be fixed; Plate: solid solution, pickling, trimming; Welded pipe: solid solution acid white + RT% flaw detection, forging: annealing + turning; Bar forging, surface polishing or turning polishing; Cold rolling of strip steel, softening of solution and descaling; Wire solution delivery pickling plate or straight strip, solid solution straight strip fine polishing state.
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GH3039
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