Gh5605 / Hayness188 / Kc20wn / Unsr30605 / Cobalt

Basic Info.

Product Description

Cobalt-based superalloys are austenitic superalloys containing 40-65% cobalt. Under the condition of 730~1100, it has certain high temperature strength, good resistance to hot corrosion and oxidation. It is suitable for making guide vanes and nozzle guide vanes of aviation jet engines, industrial gas turbines, naval gas turbines, and diesel engine nozzles.
Material grade: GH605 (GH5605)
Similar grades: L605/HS25/WF-11/AIS1670
French grade: KC20WN
US grade: UNSR30605
1. Overview of GH605
GH605 is a cobalt-based superalloy reinforced by solid solution of 20Cr and 15W.
It has moderate durability and creep strength below 815°C, excellent oxidation resistance below 1090°C, and satisfactory process performance such as forming and welding.
It is suitable for the manufacture of hot-end high-temperature parts such as aero-engine combustion chambers and guide vanes that require medium strength and excellent high-temperature oxidation resistance.
It can also be used on aerospace engines and space shuttles.
It can produce and supply various deformed products, such as sheet, medium plate, strip, bar, forging, wire and precision casting.
1.1 GH605 material grade GH605.
1.2 GH605 similar grades L605, HS25, WF-11, AlS1670, UNSR30605 (USA), KC20WN (France).
1.3 Technical standard of GH605 material
1.4 Chemical composition of GH605 See Table 1-1.
Table 1-1%
C Cr Ni W Co Mn Fe Si P S
0.05~0.15 19.0~21.0 9.0~11.0 14.0~16.0 Balance 1.0~2.0 3.0 0.40 0.040 0.030
1.5 GH605 heat treatment system
Sheet and strip: 1175~1230ºC, rapid cooling;
Ring piece: 1175~1230ºC, keep the temperature for not less than 15min, water cooling or rapid air cooling;
Bar (for machining): 1175~1230ºC, rapid cooling.
1.6 Specifications and Supply Status of GH605
It can supply hot-rolled medium plate with δ≤14mm, cold-rolled sheet with δ≤4mm, cold-rolled strip with δ0.05~0.80mm, chilled strip with δ0.20~0.80mm, and d0.2~10.0mm Welding wire, rods with d≤300mm and rings of various diameters and wall thicknesses.
The medium plate and thin plate are supplied after solid solution, alkali pickling and edge trimming; strips are supplied in rolls after solution solution, alkali pickling and edge trimming;
Chilled strips are supplied after solutionization, cold rolling, annealing, polishing and trimming; welding wires are delivered in hard, semi-hard, solution-plus-pickling, and bright-solution-treated states, and can also be delivered in straight strips. goods;
Rings are supplied after solution treatment for rough machining or descaling; bars for machining are supplied after annealing, pickling or polishing, and bars for hot working are available after annealing and polishing.
1.7 Melting and casting process of GH605 The alloy is smelted by electric arc furnace or non-vacuum induction furnace and then remelted by electroslag, or by vacuum induction melting and electroslag remelting.
1.8 Application overview and special requirements of GH605 It is mainly used on imported models to manufacture high-temperature parts such as guide vanes, turbine outer rings, outer walls, vortexers, and sealing sheets. The alloy is very sensitive to silicon content. Silicon can promote the formation of Co2W-type L phase when the alloy is exposed at 760 to 925 °C, thereby reducing the room temperature plasticity of the alloy. Therefore, the silicon content in the alloy should be controlled to be less than 0.4%.
GH605 density ρ=9.13g/cm3.
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