China brand: GH3039 nickel-based superalloy.
Russian brand: эи 602/xh75m бгю
I. overview of GH3039 nickel-base superalloy:
GH3039 is a single-phase austenite solid solution strengthening alloy, which has moderate thermal strength and good thermal fatigue performance below 800℃ and good oxidation resistance below 1000℃. After long-term use, the structure is stable, and it also has good cold formability and welding performance. Suitable for long-term use of aero-engine combustion chamber and afterburner components below 850℃. The alloy can be used to produce plates, bars, wires, pipes and forgings.
1, GH3039 material brand: GH3039(GH39)
2. Similar brands of 2.GH3039: эи 602, хн 75 мбгю (Russia).
3, GH3039 material technical standards:
4. Chemical composition of 4.GH3039: See table 1- 1. ?
Note: 1). Cerium is allowed in the alloy.
2) ω(Cu)=0.20% in the alloy. ?
5.GH3039 heat treatment system: hot rolled and cold rolled strip solution treatment: 1050 ~ 1090℃, air cooling. Solution treatment of bars and pipes: 1050 ~ 1080℃, air cooling or water cooling.
6. Variety specifications and supply status of 6.GH3039: It can supply hot-rolled plates, cold-rolled plates, strips, bars, wires, pipes and forgings of various specifications. Plates, strips and pipes are delivered after solution treatment and pickling. Welding wire is supplied in cold working state or solid solution state and delivered without heat treatment.
7. Melting and casting process of 7.GH3039: The alloy is melted by electric arc furnace, electric arc furnace or non-vacuum induction furnace plus electroslag remelting or vacuum arc remelting, and vacuum induction furnace plus electroslag remelting or vacuum arc remelting.
8. Application and special requirements of 8.GH3039: The components of aero-engine combustion chamber and afterburner made of this alloy material have been tested by long-term production and use, and their performance is good.
Second, the physical and chemical properties of GH3039:
Thermal properties of 1 and GH3039:?
Thermal conductivity of (1) and GH3039: See Table 2- 1.
2.GH3039 density:? ρ = 8.3g/cm3.
3. Electrical properties of 3.GH3039: room temperature resistivity ρ =1.18×10-6 Ω m.
4. Magnetism of 4.GH3039: The alloy is nonmagnetic. ?
5. Chemical properties of GH3039: oxidation resistance of GH3039;
(GH3039 alloy is easy to oxidize along grain boundaries when it works for a long time at high temperature. See table 2-5 for the depth of intergranular oxidation after exposure at 900 ~ 165438℃ 100 hour.
(The weight gain of GH3039 alloy during high temperature oxidation in 100h: see Figure 2- 1.
Note: ① Outer diameter > 30mm, wall thickness >; 3.0mm pipeline room temperature σb≥635MPa, δ5≥30%.
② ② For the strip with ②②δ≤0.25mm, measure δ 5 at room temperature σb≥660 MPa.
Four. Organizational structure of GH3039:
1, GH3039 phase transition temperature:
2.GH3039 Time-temperature-microstructure transition curve:
3. Microstructure of 3.GH3039 alloy;
The solid solution state of (1) and GH3039 alloys is single-phase austenite with a small amount of Ti(CN), NbC and M32C6 carbides. After long-term aging or use at 600 ~ 900℃, M32C6 carbide precipitates. After aging at 600 ~ 700℃, the precipitated carbide particles are fine and evenly distributed on the grain boundaries. When the aging temperature is higher than 700℃, it mainly precipitates along the grain boundary and aggregates and grows. No harmful phase is formed in the alloy, and the structure stability is good.
(2) GH3039 cold-rolled plate standard stipulates that the grain size in the supply state is required to be 5 ~ 8 grades.
The technological properties and requirements of verb (verb's abbreviation) GH3039: the formability of GH3039;
Forging of 1 and GH3039: The alloy has good hot working plasticity and good deformability. The forging heating temperature is1170 ~1190℃, the final forging temperature is not lower than 900℃, and the deformation during one heating is 50%.
2.GH3039 rolling: the slab blank rolling temperature is1100 ~140℃, and the final rolling temperature is1050 ~100℃. When the alloy is remelted by electroslag or vacuum consumable, the final rolling temperature should be slightly lower than that of the alloy melted by electric arc furnace. The final pass deformation of hot rolling should not be less than 13%, and the cold rolling deformation of thin plate should be 30% ~ 55%.
3. Stamping performance of 3.GH3039: The supplied sheet has good stamping habit. The limit coefficient of stamping is shown in Table 5- 1, and the general working coefficient is 80% ~ 90% of the limit coefficient. In the supply state, the number of times that the δδ 1.5mm sheet is repeatedly bent to break is 20 ~ 29 times; Hot rolled plate with cupping test depth of10.7 ~12.0 mm Δ Δ 8.5 mm should be subjected to intermediate solution treatment (no more than 12h) immediately after deep drawing to relieve stress.
① δ is the thickness of the plate.
Six, GH3039 varieties specifications and supply situation:
1. Variety classification: Special alloy can produce various specifications of GH3039 seamless pipe, GH3039 steel plate, GH3039 round steel, GH3039 forgings, GH3039 flange, GH3039 circular ring, GH3039 welded pipe, GH3039 steel strip, GH3039 wire rod and GH3039 supporting welding materials.
2, delivery status: seamless pipe: solid solution+acid white, the length can be determined; Plate: solid solution, pickling and trimming; Welded pipe: solid solution acid white +RT% flaw detection, forging: annealing+turning; Bar forging and rolling, surface polishing or turning; The strip is output after cold rolling, solution softening and descaling; The wire is delivered in the state of solution pickling, disc shape or straight bar, and the solution straight bar is finely polished.