How many degrees of high temperature resistance does K417G superalloy resist

K417G (K17G)M17G similar grades (RENE100, IN731).

Overview K417G is a nickel-based precipitation hardening equiaxed crystalline casting superalloy, which is a modified alloy of K417 alloy with a service temperature below 950. Compared with K417 alloy, the CO of the alloy is reduced by 5% and Ti is reduced, and it still has the same performance as K417 alloy, as well as the advantages of low density, good plasticity, high strength at medium temperature, and the microstructure stability of the alloy has been significantly improved. The alloy has good casting process properties and can be cast into hollow blades with complex shapes.

The main products are gas turbine blades, guide vanes and other high-temperature parts.

Application Overview & Features.

The alloy has been used in the manufacture of aero engines, turbine blades, and triad hollow guide vanes, which have been mass-produced and used well.

The alloy is cheaper and does not precipitate after 850 long-term aging, which not only makes the parts safer and more reliable when used for a long time, but also reduces the degree of segregation of the alloy and brings convenience to the production of parts.

1. K417G Introduction:

K417G is an iron-based precipitation hardening equiaxed casting superalloy, which is a modified alloy of K417G alloy, and the service temperature is below 950 degrees Celsius. Compared with K417G alloy, this alloy reduces titanium and aluminum elements, but the alloy has the characteristics of high medium temperature strength, good plasticity, low density, and the microstructure stability of the alloy has been significantly improved.

2. K417G applications and characteristics:

K417G alloy is used to make precision castings for gas turbine blades, guide vanes and other high-temperature parts. This alloy has good performance in precision casting process.

K417G (K17G) casting superalloy.

Chemical composition ( ).

Carbon, C( ), Chromium, Cr( ).

Molybdenum mo( ).

Ni( ) margin.

Cobalt co( ).

Tungsten w( ) aluminum ai ( ).

Niobium nb( ).

Titanium ti ( ).

Iron Fe ( ).

Silicon Si( ).

Manganese mn ( ).

Phosphorus p( ) sulfur s( ).

Boron b ( ) vanadium v ( ) zirconium zr ( ).

Main uses: 950 lower hollow turbine blades and guide vanes.

K417G Shanghai Bosemann Special Steel.

The presentation is for reference.

K417G Overview:

K417G is a nickel-based precipitation-hardening equiaxed crystalline casting superalloy (equivalent to the American IN731), which is an improved version of K417 alloy, which is used below 950. Compared with K417, the cobalt of the alloy is reduced by 5%, and the titanium is reduced but still has the same performance as K417, with low density, good plasticity, high strength at medium temperature, and the microstructure stability of the alloy has been significantly improved.

K417G Similar grades:

RENE100, IN731 (US).

K417G Physical Properties:

Melting Point: 1281 1327 ;

Density: =;

Coefficient of expansion: 20 800 :;

Room temperature hardness: HRC34 36

K417G Mechanical Properties:

20: yield strength 790MPa, elongation;

800: Yield strength 825MPa, elongation.

High temperature persistence: 800, 440MPa more than 1200h.

K417G Main Applications:

The alloy is used in the manufacture of aero engines, turbine blades, and hollow guide vanes in the triplet.

K417G Key Specifications:

K417G round bar.

Special temperature measuring instrument for superalloy gutai sensor

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K418 (K18) casting superalloy.

1 Overview K418 is a phase precipitation strengthened nickel-based cast superalloy. It has good creep strength, thermal fatigue properties and oxidation resistance below 900. The alloy composition is simpler, does not contain cobalt, has a lower density, and 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 service performance of parts with degraded and degraded properties after long-term use. At 800 years, a small number of phases will be precipitated, but there is no significant effect on performance. This alloy is suitable for making turbine rotor blades, guide vanes and cast turbines and other high-temperature parts of gas turbines operating below 900.

Heat treatment system cast use, or 1180, 2h, air cooling +930, 16h, air cooling.

Varieties and specifications and ** state round bar shape master alloy ingots or various castings. As-cast**.

Melting and casting process Vacuum induction furnace smelts master alloy, vacuum induction furnace remelts and casts mold casting parts and patterns.

Application Overview & Special Requirements The alloy has been widely used in turbine working blades, guide vanes and cast turbines for aviation, ground and offshore gas turbines working below 900, and is also widely used as supercharged turbines and hot extrusion dies for diesel and gasoline engines. The alloy has been proved by the long-term production and use practice of more than 1,000 tons of more than 100 manufacturers with stable metallurgical quality and reliable performance. The INC0713C alloy, which is equivalent to this alloy, is widely used as turbine working blades and guide vanes of various aero engines abroad.

The alloy must have a protective coating when used for a long time under hot corrosive conditions.

K418 is a nickel-based precipitation hardening equiaxed crystalline casting superalloy (equivalent to the United States Inconel 713C), with the phase as the precipitation strengthening phase, and the service temperature is below 900. The alloy has high creep strength, cold and heat fatigue resistance and oxidation resistance. The alloy composition is simple, does not contain cobalt, has a low density, and is usually used in the as-cast state.

Similar grades: Inconel 713C or 713C

Chemical Composition: Shanghai Shengtong Metal.

K418 Physical Properties:

Melting Point: 1295 1345 ;

Density: =;

Coefficient of expansion: 20 800 :;

Room temperature hardness (as-cast): HRC33 37

K418 mechanical properties:

20: yield strength 760MPa, elongation;

800: Yield strength 745MPa, elongation.

High temperature lasting: 800, 255MPa is greater than 8000h, 490MPa is greater than 80h.

K418 main applications and characteristics:

The alloy is suitable for making hot-end rotating and stationary precision castings operating below 900, such as turbine working blades, guide vanes, guides and cast turbines. It has been widely used in the manufacture of turbine working blades, guide vanes and cast turbines for aviation, ground and offshore gas turbines, cast turbine rotors and guides for aerospace bomb engines, as well as supercharged turbines and hot extrusion dies for diesel and gasoline engines.

Hot isostatic pressing (HIP) treatment and subsequent heat treatment of the alloy can improve the plasticity and fatigue resistance of the alloy, and can also restore the structure and service performance of parts with degraded and reduced properties after long-term use. When the alloy is used for a long time under hot corrosive conditions, it must have a protective coating. After 800 years of aging, the alloy will precipitate a small number of phases, but there is no obvious effect on the performance.

K418 Main Specifications:

K418 round bar.

Inconel 713C K418 Summary.

Inconel 713C (K418) alloy has attracted extensive attention from scholars at home and abroad, and its microscopic arrangement, mechanical function and new process have been discussed in depth.

1) The results show that the change of iron content has little effect on its microscopic arrangement, cracking mechanism and high-temperature tensile function, but when the mass fraction of iron exceeds 1%, the elongation of the material fluctuates.

2) The as-cast structure of the alloy is mainly composed of dendritic Y matrix, precipitated Y phase (with L12 ordered structure), along the dendrite arm, grain boundaries and in Y-Y'Composition of carbides precipitated between eutectics.

3) The study pointed out that the shell for turbine investment casting is not cleaned before casting or the shell is not firmly bonded, which can lead to cracks along the weak parts of the grain boundary under the force of the overrotation test. During the solidification process of the turbine, due to the inconsistent cooling rate of each part, the shrinkage is different, resulting in thermal stress. The increase of A1,Ti content can expand the effective crystallization temperature range of the alloy, which leads to the formation of hot cracking.

4) Fine-grained casting can significantly refine the grain size and strengthening phase of the alloy. Compared with ordinary casting, its strength can be increased by 10% to 30%, and the low-cycle fatigue life of the alloy can be increased by more than 3 times after fine grain casting. In addition, the application of laser forming repair technology can reduce the cracking tendency of the alloy.

Inconel 713C K418 application.

Alloys have been widely used in the manufacture of turbine operating blades, guide vanes and cast turbines for aerospace, ground and offshore gas turbines, cast turbine rotors and guides for aerospace bomb engines, and supercharged turbines and hot extrusion dies for diesel and gasoline engines. The alloy has been produced by many domestic manufacturers for a long time and proved by practice, with stable metallurgical quality and reliable function.

The alloy is treated with hot isostatic pressing and subsequent heat treatment, which can improve the plasticity and anti-fatigue function of the alloy, and can also arrange the degraded and degraded parts after a long period of use. Alloys must be protected when used for long periods of time under hot corrosive conditions. After 800 years of aging, the alloy will separate a small number of phases, but there is no obvious effect on the function.