High-temperature alloy repair material and preparation method thereof, and additive remanufacturing method and re-service evaluation method of high-temperature alloy repair part

A high-temperature alloy and repair material technology, applied in the direction of additive manufacturing, additive processing, metal processing equipment, etc., to achieve good repair quality, high bonding efficiency, and the effect of inhibiting crystal cracks

Active Publication Date: 2022-07-01
北航(四川)西部国际创新港科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current repair materials cannot solve the problem of welding hot cracks after welding repair of superalloys

Method used

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  • High-temperature alloy repair material and preparation method thereof, and additive remanufacturing method and re-service evaluation method of high-temperature alloy repair part
  • High-temperature alloy repair material and preparation method thereof, and additive remanufacturing method and re-service evaluation method of high-temperature alloy repair part
  • High-temperature alloy repair material and preparation method thereof, and additive remanufacturing method and re-service evaluation method of high-temperature alloy repair part

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preparation example Construction

[0057] The present invention provides the preparation method of the superalloy repair material according to the above technical solution, which is characterized by comprising the following steps:

[0058] Carry out batching according to the composition of the above-mentioned superalloy repair material to obtain a master alloy; smelting the master alloy to obtain a master alloy liquid;

[0059] The mother alloy liquid is subjected to condensation and crystallization to obtain electrode rods;

[0060] The electrode rod is atomized and powdered to obtain a superalloy repair material.

[0061] In the present invention, unless otherwise specified, all raw material components are commercially available commodities well known to those skilled in the art.

[0062] In the present invention, batching is performed according to the composition of the superalloy repair material described in the above technical scheme to obtain a master alloy; the master alloy is smelted and then cooled to...

Embodiment 1

[0111] Crack Repair of Gas Turbine K438 Turbine Blade

[0112] The mass percentage composition of the K438 blade to be repaired: Co 8.0~9.0%, W 2.0~2.4%, Mo 1.0~2.2%, Al 3.2~3.7%, Ti 3.0~3.5%, Nb 0.6~1.0%, Ta 1.5~ 2%, C 0.1~0.2%, Zr 0.05~0.15%, Cr 15.7~16.3%, B 0.005~0.015%, Fe≤0.5%, Mn≤0.2.

[0113] (1) Use an angle grinder to grind the K438 blade to be repaired at a speed of 1500 r / min for 3 minutes, then immerse it in ethanol, and ultrasonically clean it for 15 minutes at 50 °C and 25 kHz to obtain the pretreated K438 blade to be repaired.

[0114] (2) Then use the blue-light 3D scanner to collect the 3D data of the preprocessed K438 blade to be repaired, and then use the Geomagic Design X reverse software to collect the 3D point cloud data, carry out 3D modeling, and obtain the 3D model.

[0115] (3) At the position marked on the K438 leaf to be repaired by preprocessing (such as figure 1 ) on the plastic sheet engraved with the serial number, and perform X-ray non-destr...

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Abstract

The invention provides a high-temperature alloy repair material and a preparation method thereof, and an additive remanufacturing method and a re-service evaluation method of a high-temperature alloy repair part, and relates to the technical field of high-temperature alloy welding. The high-temperature alloy repair material provided by the invention comprises the following components in percentage by weight: 6 to 18 percent of Cr, 8.0 to 9.0 percent of Co, 2.4 to 2.8 percent of W, 1.5 to 2.0 percent of Mo, 2.5 to 3.7 percent of Al, 2.5 to 3.0 percent of Ti, 0.6 to 1.0 percent of Nb, 1.5 to 2 percent of Ta, 0.12 percent of C, 0.1 percent of Zr and the balance of Ni. According to the repair material provided by the invention, solid solution strengthening elements (Mo and Cr) are used for replacing strengthening phase forming elements (Al, Ti, C and Nb), so that liquidation cracks of the high-temperature alloy are avoided, formation of an eutectic structure of a repaired part can be inhibited, further, generation of crystal cracks is avoided, and the problem of welding hot cracks of the repaired part is solved.

Description

technical field [0001] The invention relates to the technical field of superalloy welding, in particular to a superalloy repair material and a preparation method, an additive remanufacturing method of a superalloy repair part and a re-service evaluation method. Background technique [0002] Gas turbine turbine blades are generally in service under high temperature, high pressure and high speed conditions. Due to frequent centrifugal force, thermal stress, impact from foreign objects, and wear, turbine blades are prone to cracks and even fractures and other geometric structural damages, and are one of the most vulnerable components of gas turbines. Due to the high cost, long cycle and difficulty of manufacturing turbine blades, it is of great engineering and economic significance to carry out research on blade repair methods and processes. [0003] The material of turbine blades is superalloy, and the difficulty of welding repair of superalloy is mainly the problem of crack ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22C19/05B22F1/05B22F9/08C22F1/10B33Y10/00B33Y40/10B33Y40/20B33Y70/00B33Y50/02B33Y80/00B22F10/25B22F10/85B22F10/64G01L1/25
CPCC22C19/056B22F9/082C22F1/10B33Y10/00B33Y40/10B33Y40/20B33Y70/00B33Y50/02B33Y80/00B22F10/25B22F10/85B22F10/64G01L1/25Y02P10/25
Inventor张恒李庚段浩东李树索裴延玲宫声凯
Owner北航(四川)西部国际创新港科技有限公司