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A kind of superalloy and preparation method thereof

A high-temperature alloy and master alloy ingot technology, applied in the field of high-temperature alloys, can solve the problems of great difference in cross-sectional size, complex turbocharger structure, and easy thermal cracking of blades, etc., to achieve good thermal cracking resistance and slow down thermal cracking phenomenon , The effect of reducing the number and size of thermal crack formation

Active Publication Date: 2020-04-03
ANHUI TATSU PRECISION ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the supercharged turbine is complex, the cross-sectional dimensions of the blade and the shaft differ greatly, and the thinnest part of the blade tip is even only 0.3mm. The phenomenon of high scrap rate and low yield, so it is expected to develop a new superalloy with excellent thermal crack resistance and high temperature oxidation resistance to solve the above defects

Method used

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  • A kind of superalloy and preparation method thereof
  • A kind of superalloy and preparation method thereof
  • A kind of superalloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a superalloy, according to the requirements of the required thermal crack resistance superalloy, the prepared superalloy includes the following mass percentages (wt.%) of each component:

[0028]

[0029] S1. Ingredients: weigh the ingredients according to the above ratio;

[0030] S2. Master alloy smelting: Put the Cr, Co, Mo, W, Zr, Fe, C, Mn, Si, Ta, and Ni elements weighed in step 1 in a crucible for vacuum induction melting, and wait until the added elements are completely cleared. After that, turn on magnetic stirring and continue smelting for 25 minutes; then stop heating for 5 seconds, then add Al, B and Ti elements to the melt and continue heating for 10 minutes. Then stop heating, let the liquid alloy cool down with the furnace, and when the alloy melt temperature reaches 1600°C, pour it into the ingot mold to form a master alloy ingot;

[0031] S3. Wax mold preparation: use the wax mold of the casting to press the required casting wax mo...

Embodiment 2

[0036] Such as figure 1 As shown, a high-temperature alloy, according to the requirements of the required thermal crack resistance high-temperature alloy, the prepared high-temperature alloy includes the following mass percentages (wt.%) of each component:

[0037]

[0038] S1. Ingredients: weigh the ingredients according to the above ratio;

[0039] S2. Master alloy smelting: Put the Cr, Co, Mo, W, Zr, Fe, C, Mn, Si, Ta and Ni elements weighed in step 1 in a crucible for vacuum induction melting, and wait until the added elements are completely cleared. After that, turn on magnetic stirring and continue smelting for 30 minutes; then stop heating for 15 seconds, then add Al, B and Ti elements to the melt and continue heating for 15 minutes. Then stop heating, let the liquid alloy cool down with the furnace, and when the alloy melt temperature reaches 1650°C, pour it into the ingot mold to form a master alloy ingot;

[0040] S3. Wax mold preparation: Use the wax mold of the casting ...

Embodiment 3

[0045] Such as figure 1 As shown, a superalloy, according to the requirements of the required thermal crack resistance superalloy, the prepared superalloy includes the following mass percentages (wt.%) of each component:

[0046]

[0047]

[0048] S1. Ingredients: weigh the ingredients according to the above ratio;

[0049] S2. Master alloy smelting: Put the Cr, Co, Mo, W, Zr, Fe, C, Mn, Si, Ta and Ni elements weighed in step 1 in a crucible for vacuum induction melting, and wait until the added elements are completely cleared. After that, turn on magnetic stirring and continue smelting for 39 minutes; then stop heating for 30 seconds, then add Al, B and Ti elements to the melt and continue heating for 20 minutes. Then stop heating, let the liquid alloy cool down with the furnace, and when the alloy melt temperature reaches 1700℃, pour it into the ingot mold to form a master alloy ingot;

[0050] S3. Wax mold preparation: use the wax mold mold of the casting to press the required c...

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Abstract

The invention discloses a high-temperature alloy. The high-temperature alloy comprises the following raw materials of, by mass percent, 10.1-12.5% of Cr, 4.6-5.8% of Ti, 7.0-9.0% of Co, 2.0-2.25% of Mo, 7.0-9.0% of W, 6.25-6.75% of Al, less than or equal to 0.03% of Zr, less than or equal to 1.0% of Fe, 0.13-0.17% of C, 0.02-0.03% of B, less than or equal to 0.2% of Mn, less than or equal to 0.2%of Si, 3.25-3.75% of Ta, and the balance Ni. The invention further discloses a preparation method of the high-temperature alloy and belongs to the technical field of the high-temperature alloys. Compared with a similar formed material, the high-temperature alloy obtained by the preparation method has higher high-temperature endurance life and has the advantage of excellent resistance to thermal crack, and the thermal crack problem of the high-temperature alloy is solved greatly.

Description

Technical field [0001] The invention relates to a high-temperature alloy and a preparation method thereof, and belongs to the technical field of high-temperature alloys. Background technique [0002] More than 50% of the materials of modern gas turbine engines are made of superalloys, but the development of turbine materials in my country lags far behind developed countries such as Europe and the United States. With the development of supercharger technology, turbine materials are constantly updated. Before 1988, the 20Cr3MoV(A) material was generally used for the turbocharger of diesel engines, which was only suitable for low-speed (about 40,000r / min) and larger turbochargers. As the speed of the turbocharger becomes higher and smaller, the exhaust temperature of the diesel engine gradually reaches above 750°C. This material can no longer meet the requirements of the turbocharger. Subsequently, it was replaced with iron-based superalloy, and a few years later, it was updated t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C1/03C22F1/10
CPCC22C1/023C22C1/03C22C19/056C22F1/10
Inventor 巨佳王章忠王珏刘壮张保森章晓波毛向阳巴志新李旋李华冠
Owner ANHUI TATSU PRECISION ALLOY
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