High-W-content high-Mo-content nickel-base high-temperature alloy and preparation method thereof

A nickel-based superalloy and content technology, applied in the direction of improving energy efficiency and process efficiency, can solve problems such as unevenness and abnormal aggregation structure, achieve uniform distribution of carbides, reduce the fluctuation range of melting parameters, reduce Effect of Precipitation Tendency

Inactive Publication Date: 2020-08-25
JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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Problems solved by technology

[0005] At present, the domestic mainstream production method is: non-vacuum induction + electroslag density melting + free forging. Due to the high content of W and Mo elements (average 8%) and the average Cr element 20.5%, the alloy solidification process is M6C This means that a large number of carbides will be precipitated, and at the same time, the precipitation process of carbides is prone to abnormal aggregation, resulting in uneven structure. The high-magnification structure can be seen figure 1 ; The internal abnormally gathered carbides bring product quality risks to the use of downstream users. Users have a certain probability of cracks in the thermal processing process. After later verification, the positions where the cracks appear are accompanied by abnormal carbides. Therefore, the interior of the GH3128 alloy bar is improved. Carbide accumulation in tissues is a key link in improving the quality of materials

Method used

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  • High-W-content high-Mo-content nickel-base high-temperature alloy and preparation method thereof
  • High-W-content high-Mo-content nickel-base high-temperature alloy and preparation method thereof
  • High-W-content high-Mo-content nickel-base high-temperature alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A nickel-based high-temperature alloy with high W and Mo content. In terms of mass percentage, the composition content of elements in the alloy is: C0.013wt%, Cr 20wt%, W 7.9wt%, Mo 7.9wt%, Al 0.6wt%, Ti 0.6wt%, Mn 0.28wt%, Si 0.15wt%, P 0.002wt%, S 0.001wt%, Fe 0.11wt%, B 0.002wt%, Ce 0.02wt%, Zr 0.02wt%, the balance being Ni.

[0029] 2. a kind of preparation method of high W, Mo content nickel base superalloy, it is characterized in that: comprise the following steps:

[0030] 1) The composition of the nickel-based superalloy alloy is calculated by mass percentage: C 0.013wt%, Cr 20wt%, W7.9wt%, Mo 7.9wt%, Al 0.6wt%, Ti 0.6wt%, Mn 0.28wt%, Si 0.15wt%, P 0.002wt%, S 0.001wt%, Fe 0.11wt%, B 0.002wt%, Ce 0.02wt%, Zr 0.02wt%, the balance is Ni; C, Cr, W, Mo, Si , P, S, Fe, and Ni are added to the crucible, and the crucible is put into a vacuum induction furnace for vacuum melting. The working vacuum degree during vacuum melting is ≤15Pa, and the melting temperature of t...

Embodiment 2

[0034] A nickel-based high-temperature alloy with high W and Mo content. In terms of mass percentage, the composition content of elements in the alloy is: C0.015wt%, Cr 20.5wt%, W 8.0wt%, Mo 8.0wt%, Al 0.65wt% , Ti 0.68wt%, Mn0.30wt%, Si 0.19wt%, P 0.010wt%, S 0.010wt%, Fe 0.15wt%, B 0.003wt%, Ce0.03wt%, Zr 0.04wt%, the balance is Ni .

[0035] A kind of preparation method of high W, Mo content nickel base superalloy, wherein: comprise the following steps:

[0036] 1) The composition of the nickel-based superalloy alloy is calculated by mass percentage: C 0.015wt%, Cr 20.5wt%, W8.0wt%, Mo 8.0wt%, Al 0.65wt%, Ti 0.68wt%, Mn 0.30wt% , Si 0.19wt%, P0.010wt%, S 0.010wt%, Fe 0.15wt%, B 0.003wt%, Ce 0.03wt%, Zr 0.04wt%, the balance is Ni; C, Cr, W, Mo, Si, P, S, Fe, Ni are added to the crucible, and the crucible is put into a vacuum induction furnace for vacuum melting. The working vacuum degree during vacuum melting is ≤15Pa, and the melting temperature of raw materials is 1480°C. ...

Embodiment 3

[0040] A nickel-based superalloy with high W and Mo content: calculated by mass percentage, the composition content of elements in the alloy is: C0.018wt%, Cr 21wt%, W 8.1wt%, Mo 8.1wt%, Al 0.75wt% , Ti 0.75wt%, Mn 0.33wt%, Si 0.20wt%, P 0.013wt%, S 0.013wt%, Fe 0.19wt%, B 0.005wt%, Ce 0.05wt%, Zr0.06wt%, the balance is Ni .

[0041] A kind of preparation method of high W, Mo content nickel base superalloy, comprises the following steps:

[0042] 1) The components of the nickel-based superalloy alloy are calculated by mass percentage: C 0.018wt%, Cr 21wt%, W8.1wt%, Mo 8.1wt%, Al 0.75wt%, Ti 0.75wt%, Mn 0.33wt%, Si 0.20wt%, P0.013wt%, S 0.013wt%, Fe 0.19wt%, B 0.005wt%, Ce 0.05wt%, Zr 0.06wt%, the balance is Ni; C, Cr, W, Mo, Si , P, S, Fe and Ni are added to the crucible, and the crucible is put into a vacuum induction furnace for vacuum melting. , the refining vacuum degree is ≤5Pa, the refining temperature is 1520°C, and the refining time is 120min, then add B, Ce, Zr, Mn...

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Abstract

The invention provides a high-W-content high-Mo-content nickel-base high-temperature alloy. The high-W-content high-Mo-content nickel-base high-temperature alloy comprises the following element components in percentage by mass of 0.013-0.018wt% of C, 20-21wt% of Cr, 7.9-8.1wt% of W, 7.9-8.1wt% of Mo, 0.6-0.75wt% of Al, 0.6-0.75wt% of Ti, 0.28-0.33wt% of Mn, 0.15-0.20wt% of Si, 0.002-0.013wt% of P,0.001-0.013wt% of S, 0.11-0.19wt% of Fe, 0.002-0.005wt% of B, 0.02-0.05wt% of Ce, 0.02-0.06wt% of Zr, and the balance Ni. According to the high-W-content high-Mo-content nickel-base high-temperaturealloy disclosed by the invention, the elemental composition compounding ratio is optimized, so that deposition tendency of carbides is reduced, the distribution of the carbides is more uniform, and gathering tendency is reduced.

Description

technical field [0001] The invention relates to the field of nickel-based superalloy manufacturing, in particular to a nickel-based superalloy with high W and Mo content and a preparation method thereof. Background technique [0002] The GH3128 alloy is a nickel-based alloy that is solid-solution strengthened by W and Mo elements and strengthened by B, Ce, and Zr at the grain boundaries. The composition is shown in Table 1. The alloy has high plasticity, high permanent creep strength, good oxidation resistance and stamping and welding properties. It is suitable for combustor flame tubes, afterburner housings, regulator plates and other high-temperature parts of aero-engines working at 950°C for a long time. The alloy is a single-phase austenite structure in the solid solution state, containing a small amount of fine and uniformly distributed TiN and a large amount of M6C, and phases such as M6C, μ and M23C6 are precipitated during the long-term failure process. [0003] Ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22B9/18C22F1/10
CPCC22C19/055C22C1/023C22B9/18C22F1/10Y02P10/25
Inventor 李成龙浦益龙赵长虹王世普孙文儒荣文凯王玉葵贾鸿远钟裕国夏翅鹏李晴王琦
Owner JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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