Inconel718合金概述 点击进入阿里巴巴店铺
Inconel718是含铌、钼的沉淀硬化型镍铬铁合金，在700℃时具有高强度、良好的韧性以及在高低温环境均具有耐腐蚀性。Inconel718合金在-253～700℃温度范围内具有良好的综合性能，650℃以下的屈服强度居变形高温合金的首位，并具有良好的抗疲劳、抗辐射、抗氧化、耐腐蚀性能，以及良好的加工性能、焊接性能良好。汉锴主要供应产品有锻件、锻棒、轧棒、冷轧棒、圆饼、环件、板、带、丝、管等。
Inconel718应用概况
合金主要用于制造各种形状复杂的零部件，在宇航、核能、石油工业及挤压模具中获得了极为广泛的应用。合金在700℃时具有高温强度和优秀的耐腐蚀性能、易加工性，Inconel718合金可广泛应用于各种高要求的场合如汽轮机，液体燃料火箭，低温工程，酸性环境，核工程。可制成盘、环、叶片、轴、紧固件和弹性元件、板材结构件、机匣等零部件在航空上长期使用。
Inconel718相近牌号
GH4169 GH169（中国）、UNS NO7718(美国）、NC19FeNb（法国）、2.4668-NiCr19Fe19Nb5Mo3（德国）、NA 51（英国）NiCr19Nb5Mo3(ISO)
Inconel718执行标准
| Inconel 718执行标准 | ||||
| 标准 | 板材 | 棒材 | 带材 | 锻件 |
| ASTM | B670 | B637 | B670 | B637 |
| ASME | SB670 | SB637 | SB670 | SB637 |
Inconel718化学成分
| Inconel 718化学成分 | |||||||
| 元素 | C | Cr | Ni | Co | Al | Mo | Nb |
| 质量分数/% | ≤0.08 | 17.00-21.00 | 50.00-55.00 | ≤1.00 | 0.20-0.80 | 2.80-3.30 | 4.75-5.5 |
| 元素 | Fe | Mn | Si | S | Cu | Ti | P |
| 质量分数/% | 余量 | ≤0.35 | ≤0.35 | ≤0.01 | ≤0.30 | 0.65-1.15 | ≤0.01 |
Inconel718物理性能
| Inconel 718物理性能 | ||||
| 密度 | 熔化温度范围 | 弹性模量 | 比热容 | 电阻率 |
| g/cm3 | ℃ | GPa | J/kg•℃ | μΩ•m |
| 8.24 | 1260～1320 | 204 | 460 | 1.18 |
Inconel718机械性能
| Inconel 718机械性能 | ||||
| 品种 | 规格 | 抗拉强度MPa | 屈服强度MPa | 延伸率A5 % |
| 带材 | ＜0.25mm | ≥1241 | ≥1034 | ≥12 |
| 板材 | 0.25-25.4mm | ≥1241 | ≥1034 | / |
| 棒材 | ≤127mm | ≥1240 | ≥1030 | ≥6 |
Characteristics of Inconel718
1.Good processing properties in the solution-annealed condition
2.Good mechanical short and long-term properties, and great fatigue strength in the age hardened condition
3.Good creep resistance up to 700 °C
4. Good oxidation resistance up to approx. 1,000°C
5.Excellent mechanical properties in low temperatures
Corrosion resistance of Inconel718
Based on the high chrome and molybdenum concentrations, GH4169 has a good resistance in many media against abrasive and local corrosion such as pitting. By virtue of its high nickel content, GH4169 also has good resistance against stress corrosion cracking.
Typical applications of Inconel718
1.Alloy has been used to make aero-engine turbine discs, rings, casings, shafts, blades, fasteners, elastic elements, gas conduits, sealing elements and welded structural parts;
2.Make turbine rotors and other components in liquid hydrogen and liquid oxygen rocket engines;
3.Make various elastic elements and grids for nuclear power industry applications;
4.Manufacture various parts used in petroleum and chemical industry.
