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Casting superalloy
2、Type: According to the composition of the matrix, it can be divided into iron-based casting superalloys, nickel-based casting superalloys and drill-based casting superalloys. According to the crystallization method, it can be divided into four types: polycrystalline casting superalloy, directional solidification casting superalloy, directional eutectic casting superalloy and single crystal casting superalloy. Most of the cast superalloys are polycrystalline cast superalloys.
Application: Manufacturing aircraft engine blades, heat-resistant parts of fuel turbines, turbocharger blades, etc.
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Product description
1. Definition: The high-temperature alloy material of the parts directly prepared by the casting method.
2. Type: According to the composition of the matrix, it can be divided into iron-based casting superalloys, nickel-based casting superalloys and drill-based casting superalloys. According to the crystallization method, it can be divided into four types: polycrystalline casting superalloy, directional solidification casting superalloy, directional eutectic casting superalloy and single crystal casting superalloy. Most of the cast superalloys are polycrystalline cast superalloys.
3. Features: A. It has a wider range of composition, because it does not have to take into account its deformation processing performance, the design of the alloy can focus on optimizing its performance. For example, for nickel-based superalloys, the γ'content can be adjusted to 60% or higher by adjusting the composition, so that the alloy can still maintain excellent performance at a temperature as high as 85% of the melting point of the alloy. B. It has a wider application field. Due to the special advantages of the casting method, it is possible to design and manufacture near-net shape or no margin superalloy castings with arbitrary complex structures and shapes according to the needs of the parts.
4. Purpose: Manufacturing aircraft engine blades, heat-resistant parts of fuel turbines, turbocharger blades, etc.
5. Brand DD406, K213, K4002, K418, K423, K4169, K640, K438, K424, CoCrMo, Stellite alloy, etc.
| Brand | Specification | Feature | Application field | Guideline |
| DD406 | Mainly 70 and 90mm round bars (2.5 to 8.0mm, 30 to 170mm) | It is the second-generation nickel-based single crystal superalloy developed in my country. It has the advantages of high high-temperature strength, good overall performance, stable structure and good casting process performance. It is equivalent to the second-generation single crystal superalloys PWA1484, Rene N5 and CMSX-4 used abroad. | The long-lasting strength of the alloy is suitable for making high temperature parts such as turbine working blades of gas turbines with complex inner cavities that work below 1100°C and guide blades that work below 1150°C. | GBT25932 General technical conditions for casting superalloy master alloys, YB-T5248 casting superalloy master alloys, GB-T14992 superalloy and intermetallic compound high-temperature materials classification and designation, GB/T 28411 general technical conditions for high-temperature alloy precision casting structures |
| K213 | K213 alloy is an iron-nickel-chromium-based casting high-temperature alloy. It mainly uses aluminum and titanium to form Y'phase for precipitation strengthening. A certain amount of tungsten can be used for solid solution strengthening, and a small amount of boron is added to strengthen the grain boundary. The alloy has good casting process properties, and can have good comprehensive properties and structural stability below 750°C. | It is suitable for manufacturing radial flow supercharged turbine, axial flow supercharged turbine blades, gas turbine and flue gas turbine motor and stationary blades for long-term use below 750℃. | ||
| K4002 | K4002 is a nickel-based precipitation hardening type equiaxed crystal casting superalloy, the service temperature is below 1000℃. The medium temperature and high temperature performance level of the alloy is the highest level of the existing equiaxed crystal casting nickel-based superalloy. The structure of the alloy is stable, and the resistance to high temperature oxidation and heat corrosion is good. The sampling performance of the parts is close to that of the single casting sample, and the performance data is less dispersed. The alloy has good casting process performance, but because it contains more tungsten, tantalum and hafnium elements, it has a higher density than other equiaxed nickel-based superalloys. | It is suitable for manufacturing turbine rotor blades and cast turbine discs that work below 1000°C. | ||
K418（Inconel 713C） |
K418 is a Y'-phase precipitation strengthening nickel-based casting superalloy. It has good creep strength, thermal fatigue performance and oxidation resistance below 900°C. The alloy composition is relatively simple, does not contain cobalt, and has a low density. It is usually used in the as-cast state. The use of hot isostatic pressing (HIP) treatment and subsequent heat treatment can improve the plasticity and fatigue properties, and can also restore the structure and performance of parts that have degraded and reduced performance after long-term use. A small amount of σ phase will be precipitated for long-term effectiveness at 800℃, but it has no obvious effect on performance. | The alloy is suitable for the production of working blades, guide blades and cast turbines of aviation, ground and offshore gas turbines working below 900℃. It is also widely used as diesel and gasoline engine turbochargers and hot extrusion dies. | ||
| K423 | K423 is a nickel-based precipitation hardening type equiaxed casting superalloy, mainly by adding titanium and aluminum elements to form a precipitation strengthening phase, adding a certain amount of chromium, cobalt and molybdenum elements for solid solution strengthening, and adding appropriate amounts of boron and hafnium elements to strengthen the grain boundary . The alloy has good casting properties, and has good oxidation resistance and thermal fatigue resistance below 1000 degrees Celsius. | K423 alloy is used to make hollow and solid guide vanes and cast guides of gas turbines, etc. | ||
| K4169（Inconel 718C） | K4169 is a nickel-based precipitation hardening type equiaxed crystal casting superalloy. The alloy uses Y phase as the main strengthening phase and Y phase as the auxiliary strengthening phase. The alloy has high strength and plasticity in a wide medium and low temperature range, excellent corrosion resistance and radiation resistance, and good welding and forming properties, and has good resistance to strain aging cracking. | Suitable for making engine blades, casings and other structural parts that work below 850°C. | ||
| K640 | K640 (formerly K40) solid solution strengthened and carbide strengthened cobalt-based casting superalloy, its strength level is slightly lower than that of nickel-based casting superalloy K401, it has excellent thermal fatigue performance, oxidation resistance and corrosion resistance at high temperatures . | K640 is suitable for making gas turbine guide blades that work below 1000℃. It has stable structure and good casting performance during long-term aging at 800℃. It can be cast into hollow blades and other parts with complex shapes. | ||
| K438 | K438 is a nickel-based precipitation hardening type equiaxed crystal casting superalloy. It is characterized by low phosphorus content, small solidification segregation, and a service temperature below 900°C. | The alloy has been used to make industrial gas turbine blades, seaplanes and ship gas turbine parts that work for a long time below 900°C. | ||
| K424 | K424 is a nickel-based precipitation hardening type equiaxed crystal casting superalloy, the service temperature is less than 1000 ℃. The alloy is characterized by high content of aluminum and titanium elements and low density. The alloy has high high temperature strength and plasticity, good casting performance. | The main products are precision casting structural parts such as turbine rotor blades, integral casting turbine rotors and guides, and tail jet adjusting plate bottom plates. | ||
| CoCrMo | It is one of the cobalt-based alloys, and is also a kind of Stellite alloy, which is a kind of cobalt-based alloy that can resist wear and corrosion. | It can be made into welding wire, powder is used for hard surface welding, thermal spraying, spray welding and other processes, and it can also be made into castings and forgings and powder metallurgy parts. | ||
| Stellite 1 | 2.5 to 8.0mm round bar | Stellite is a cemented carbide that can withstand various types of wear, corrosion and high temperature oxidation. It is commonly referred to as cobalt-chromium-tungsten (molybdenum) alloy or cobalt-based alloy. Stellite alloy is a type of alloy with cobalt as the main component, containing a considerable amount of nickel, chromium, tungsten and a small amount of alloying elements such as molybdenum, niobium, tantalum, titanium, lanthanum, and occasionally also containing iron. According to the different composition of the alloy, they can be made into welding wire, powder used for hard surface welding, thermal spraying, spray welding and other processes, and can also be made into castings and forgings and powder metallurgy parts. | Valve seat, bearing, knife edge, etc. | |
| Stellite 3 | Needle valve seat, valve seat, rolling steel guide roller | |||
| Stellite 4 | Hot press die, hot extrusion die, dry battery industry | |||
| Stellite 6 | Engine valves, high temperature and high pressure valves, turbine blades | |||
| Stellite 12 | High temperature and high pressure valves, saw teeth, screw push rods, etc. | |||
| Stellite 20 | Bearing sleeve, wear plate | |||
| Stellite 21 | Turbine blades, various liquid valves, valve seats, hot dies, etc. | |||
| Stellite 31 | Gas turbine blade | |||
| Stellite 190 | Oil drilling tools | |||
| Stellite 706 | Engine valve, high temperature and high pressure valve | |||
| Stellite 712 | High temperature and high pressure valve, screw push rod | |||
| Tribaloy 400 | Gate valve and extruder used in high temperature and strong corrosion medium | |||
| Tribaloy 800 | Gate valve and extruder used in high temperature and strong corrosion medium | |||
| Stellite F | Internal combustion engine intake and exhaust valve |
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1. Welding wire is used as a filler metal or at the same time as a conductive wire welding material.<br>
2. Nickel and nickel alloy solid welding wires are suitable for welding nickel and nickel alloy solid wires and filler wires (referred to as welding wires) for molten metal gas shielded arc welding, tungsten gas shielded arc welding, gas welding and plasma arc welding. <br>
The high-temperature strength is higher than that of iron-chromium-aluminum, and it is not easy to deform under high-temperature use. Its structure is not easy to change, its plasticity is better, and it is easy to repair. Disadvantages: Due to the use of rarer nickel metal materials, the price of this series of products is up to several times higher than that of iron, chromium and aluminum, and the use temperature is lower than that of iron, chromium and aluminum.
1. Corrosion resistant alloys have unique corrosion resistance and even high temperature corrosion resistance in many industrial corrosive environments, and have high strength, good plasticity and toughness, and can be smelted, cast, cold and hot deformed, processed and formed and welded. They are widely used In petrochemical, energy, marine, aerospace and other fields.<br>
2. Brands: Hasetlloy c-276, Hasetlloy c-4, Hasetlloy B, Hasetlloy G-3, ALLOY20cb3, Incoloy 800H, Incoloy 825, Inconel600, Inconel690, etc.
1. Deformed superalloy refers to a type of metal material based on iron, nickel, and cobalt that can resist oxidation or corrosion in a high temperature environment above 600 ℃, and can work for a long time under a certain stress.<br>
2. Brands: Hastelloy x, Hastelloy R-135, Nimonic 80A, Nimonic 90, Incoloy901, Incoloy903, Inconel718, Inconel x-750, Udimet500, etc.
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