GH 1 13 1 What are the materials and chemical compositions?

Gh1131(GH131) solid solution strengthened high performance superalloy,

GH 1 13 1 is a high-performance superalloy strengthened by elements such as tungsten, molybdenum, niobium and nitrogen. Its nickel content is about 28%, but its thermal strength level is different from that of GH3044 alloy. ? The alloy has good hot working plasticity and welding and cold forming process properties. Main varieties and main products? There are cold-rolled plate, hot-rolled medium plate, bar, flat steel and wire. It can be used to manufacture rocket engines working at 700 ~ 1000℃ for a short time and high-temperature components of aero-engines working at 700℃ and 750℃ for a long time.

Gh1131(GH131) heat treatment system.

Hot-rolled plate and cold-rolled plate are1130 ~1170℃ and air cooled; Bar:1160℃10℃, air cooling treatment.

Variety specifications and status of GH1131(GH131).

Cold rolled sheet, hot rolled sheet, bar, welding wire, etc. Hot rolled plates and cold rolled plates are supplied after solution treatment, pickling, straightening and trimming; The bar provided has not been heat treated; Welding wire is supplied in cold-drawn state, heat-treated and acid-washed state or semi-hard state.

Gh1131(GH131) casting process?

The alloy is produced by non-vacuum induction furnace plus electroslag remelting or arc melting plus electroslag remelting.

General situation and special requirements of GH1131(GH131)?

The alloy is mainly used as a high temperature component of rocket engine. On the aero-engine, the adjustable nozzle shell and the afterburner regulator have been manufactured and put into production. Compared with similar nickel-based alloys, the high-temperature oxidation resistance of this alloy is poor, and the plasticity at room temperature decreases after long-term use at 700 ~ 900℃, resulting in poor formability.

1. 1, material grade? GH 1 13 1(GH 13 1)

1.2, GH1131(GH131) similar brands.

х 21н 28 в 5 м 3 б, ар, л126, вв 100 (Russia)

Technical standards for 1.3, GH11(GH131) materials.

GB/T 14992- 1994 "superalloy grades"

GB/T 14995- 1994 "high temperature alloy hot rolled steel plate"

GJB 1952- 1994 Specification for Cold Rolled Superalloy Sheet for Aviation.

GJB 26 12- 1996 Specification for Welding Superalloy Cold-drawn Steel Wire

YB/T5245- 1993 "Hot Rolled and Forged Bars of Superalloy for General Bearing Parts"

GH 1 13 1-4, organizational structure?

4. 1, phase transition temperature

4.2. Time-temperature-structure transition curve

4.3, alloy structure

The microstructure of the alloy in solid solution state includes a Z-direction [(W, Nb)CrN] and a small amount of NbC, which accounts for about 65,438+0.43% of the alloy and is evenly distributed as impurities. After long-term aging at 700~950℃ for 20 hours, L phase and a small amount of M6C phase are precipitated, and there is also supplementary precipitation in Z direction, but the precipitation amount does not change much with aging time. L phase belongs to FeMo type, and the precipitation peak of L phase is 800℃, and it begins to dissolve again at 900℃. At 950℃, the precipitation amount of M6C is large, while at other aging temperatures, the precipitation amount remains unchanged.

GH 1 13 1-5, process performance and requirements?

5. 1, formability

The heating temperature of ingot forging is1120℃ 20℃, the initial forging temperature is greater than 980℃, the final forging temperature is not lower than 900℃, and the deformation during one heating is 40%. The slab rolling heating temperature is1150℃ 20℃, the initial rolling temperature is higher than 1050℃, the final rolling temperature is not lower than 900℃, the final pass reduction rate is not lower than 10%, and the thin plate hot rolling rough rolling heating temperature is1/. The intermediate quenching temperature is 1 150℃ 10℃. Cold rolling reduction rate is 20%~30%, flatness 1%~3%.

5.2, welding performance

The alloy has good weldability, and can be connected by spot welding, seam welding and argon arc welding, and the associated joint temperature can be obtained. The alloy can be welded with GH3030, GH3039, GH3044 and GH 1 140 alloys, and the joint performance is good.

5.3、? Heat treatment process of parts

The final heat treatment temperature of plate parts is 1 150℃ 10℃ or1080℃ ~120℃, and the intermediate heat treatment temperature is1000℃/kloc. Air cooling.

5.4, surface treatment process

After softening heat treatment and finished product heat treatment, the oxide scale of the alloy plate that has not been removed must be alkali washed and acid washed, and the finished plate after heat treatment should be bleached in addition to alkali washed and acid washed.