GH625/GH3625
説明
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1. Introduction to GH625/GH3625 materials
GH3625 (GH625) alloy is a solid solution-strengthening nickel-based deformation high-temperature alloy with molybdenum niobium as the main reinforcement element. It has excellent corrosion resistance and oxidation resistance. It has good tensile and fatigue properties from low temperature to 980 degrees Celsius, and is resistant to stress corrosion under salt spray atmosphere.
実施基準
GJB 1953-1994 “Specifications on Hot Rolled Rods for High Temperature Alloys for Rotating Parts of Aero Engines”
GJB 2611-1996 “Specifications for Cold Pulling Rods for High Temperature Alloys for Aviation”
GJB 2612-1996 "溶接用高温合金の冷間引抜材の仕様"
GJB 3020-1997「航空用高温合金リングビル仕様
GJB 3165-1998 航空機搭載部品用熱間圧延鍛造棒鋼仕様書
GJB 3782-1999 “Specifications for High Temperature Alloy Rods for Aviation”
HB 5198-1982 “Deformed high-temperature alloy rods for aviation blades”
2.化学成分
| 合金メダル | % | C | Cr | Co | で | モ | Nb | フェ | アル | の | そして | ムン | S | P | 銅 |
| Gh625/
Gh3625 |
最小値 | – | 20.0 | – | Remain
quantity |
8.0 | 3.15 | – | – | – | – | – | – | – | – |
| 最大値 | 0.10 | 23.0 | 1.0 | 10.0 | 4.15 | 5.0 | 0.4 | 0.4 | 0.5 | 0.5 | 0.015 | 0.015 | 0.07 |
3.物理的性質
| 密度
g / cm3 |
融点
℃ |
熱伝導率
λ/(W/m·℃) |
比熱容量
J/kg·℃ |
弾性率
GPa |
せん断弾性率
GPa |
抵抗率
μΩ·m |
Poisson’s | 線膨張係数
a/10-6℃-1 |
| 8.44 | 1290
1350 |
12.1(100℃) | 430 | 205 | 79 | 1.28 | 0.308 | 12.3(20~100℃) |
4. Mechanical properties
(Minimum value of mechanical properties detected at 20°C [1] )
| Heat treatment method | 張力
σb/MPa |
収量
σp0.2/MPa |
伸び
S5 /% |
ブリネル硬度
HBS |
| 固溶体処理 | 830 | 410 | 30 | ≤290 |
V. Alloy characteristics :
It has excellent corrosion resistance to various corrosive media in the oxidation and reduction environments
Excellent resistance to pit and crevice corrosion and does not cause stress corrosion cracking due to chloride
Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid, and mixed acid of sulfuric acid and hydrochloric acid, etc.
Excellent resistance to corrosion of various inorganic acid mixed solutions
When the temperature reaches 40℃, it can show good corrosion resistance in hydrochloric acid solutions of various concentrations.
Good processability and welding properties, no cracking sensitivity after welding
Manufacturing certification for pressure vessels with wall temperatures between -196 and 450°C
6. Application areas
Components of organic chemical process processes containing chlorides, especially in the use of acid chloride catalysts
Cookers and bleaching tanks for the pulp and paper industry
Absorption towers, reheaters, flue gas inlet baffles, fans (wet), stirrers, deflectors and flue ducts in flue gas desulfurization system
Equipment and components for the manufacture of acid gas environments
Reaction of acetic acid and acetic anhydride
