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High-temperature alloy and preparation method thereof

A technology for superalloy and parent alloy ingots, applied in the field of superalloys, can solve the problems of greatly different cross-sectional dimensions, complex supercharger turbine structure, easy hot cracking of blades, etc., to achieve good resistance to hot cracking and slow down the phenomenon of hot cracking , the effect of reducing the number and size of thermal crack formation

Active Publication Date: 2018-11-30
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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  • High-temperature alloy and preparation method thereof
  • High-temperature alloy and preparation method thereof
  • High-temperature alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown, a kind of superalloy, according to the requirement of required hot cracking resistant superalloy, the superalloy of preparation comprises each component of following mass percent (wt.%):

[0028]

[0029] S1. Ingredients: weigh 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 into the crucible for vacuum induction melting, and the added elements are completely dissolved Finally, turn on the magnetic stirring and continue the smelting time 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 with the furnace, and pour it into the ingot mold when the temperature of the alloy melt reaches 1600°C to form a master alloy ingot;

[0031] S3. Wax pattern mold preparation: Use the wax pattern mold of the casting to press out ...

Embodiment 2

[0036] Such as figure 1 Shown, a kind of superalloy, according to the requirement of required hot cracking resistant superalloy, the superalloy of preparation comprises each component of following mass percent (wt.%):

[0037]

[0038] S1. Ingredients: weigh 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 into the crucible for vacuum induction melting, and the added elements are completely dissolved Finally, turn on the magnetic stirring and continue the smelting time 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 with the furnace, and pour it into the ingot mold when the temperature of the alloy melt reaches 1650°C to form a master alloy ingot;

[0040] S3. Wax mold preparation: Use the wax mold of the casting to press out the required wax...

Embodiment 3

[0045] Such as figure 1 Shown, a kind of superalloy, according to the requirement of required hot cracking resistant superalloy, the superalloy of preparation comprises each component of following mass percent (wt.%):

[0046]

[0047]

[0048] S1. Ingredients: weigh 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 into the crucible for vacuum induction melting, and the added elements are completely dissolved Finally, turn on the magnetic stirring and continue the smelting time 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 with the furnace, and pour it into the ingot mold when the temperature of the alloy melt reaches 1700°C to form a master alloy ingot;

[0050] S3. Wax pattern mold preparation: Use the wax pattern mold of the casting ...

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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, belonging to the technical field of high-temperature alloys. Background technique [0002] More than 50% of the materials used in modern gas turbine engines are high-temperature alloys, but the development of turbine materials in my country lags behind that of developed countries such as Europe and the United States. With the development of supercharger technology, turbine materials are also constantly updated. Before 1988, 20Cr3MoV(A) material was commonly used in turbochargers of diesel engines, which was only suitable for large turbochargers with low speed (about 40000r / min). As the speed of the supercharger becomes higher and the volume becomes smaller and smaller, the exhaust temperature of the diesel engine gradually reaches above 750°C, and this material can no longer meet the requirements of the supercharger. Then it was replaced with an iron-based superalloy,...

Claims

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Application Information

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Patent Type & Authority Applications(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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