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IC10 alloy connecting and repairing method for controlling dendrite growth direction through laser

A technology of growth direction and repair method, which is applied in the field of laser material processing, can solve the problems of urgent research tasks, heterogeneous joints and mismatched tensile strength wood

Inactive Publication Date: 2013-11-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the above-mentioned brazing or TLP diffusion welding method is a feasible method to solve the connection problem of IC10 materials, there are also problems such as heterogeneous joints and tensile strengths that do not match wood. Research tasks are urgent

Method used

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  • IC10 alloy connecting and repairing method for controlling dendrite growth direction through laser
  • IC10 alloy connecting and repairing method for controlling dendrite growth direction through laser
  • IC10 alloy connecting and repairing method for controlling dendrite growth direction through laser

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] DC-035 Slab CO produced by German Rofin-Sinar Company is used for welding 2 A laser acts as a heat source. The laser's stable output power ranges from 350W to 3500W, and it adopts RF radio frequency excitation. The cylindrical mirror forms an unstable resonant cavity, and the outgoing window adopts thermally stable gemstones. Use the beam shaping element to shape the square light spot output by the laser into a circular symmetrical beam, which is transmitted to the processing position through the light guide system, and focused by the oxygen-free copper parabolic mirror. The beam mode is close to TEM 00 mold. The specific parameters are: beam diameter φ=17mm, K f =3.7mm·mrad, K≥0.95, focusing lens is copper parabolic mirror with focal length f=300mm, focal spot diameter D=0.2684mm, divergence angle θ=52.0175mrad, M 2 =1.01, depth of focus Z R =5.0537mm. The motion system is a five-axis linkage CNC machine tool from Arnold Company.

[0043] The material used in the...

Embodiment 2

[0046] DC-035 Slab CO produced by German Rofin-Sinar Company is used for welding 2 A laser acts as a heat source. The laser's stable output power ranges from 350W to 3500W, and it adopts RF radio frequency excitation. The cylindrical mirror forms an unstable resonant cavity, and the outgoing window adopts thermally stable gemstones. Use the beam shaping element to shape the square light spot output by the laser into a circular symmetrical beam, which is transmitted to the processing position through the light guide system, and focused by the oxygen-free copper parabolic mirror. The beam mode is close to TEM 00 mold. The specific parameters are: beam diameter φ=17mm, K f =3.7mm·mrad, K≥0.95, focusing lens is copper parabolic mirror with focal length f=300mm, focal spot diameter D=0.2684mm, divergence angle θ=52.0175mrad, M 2 =1.01, depth of focus Z R =5.0537mm. The motion system is a five-axis linkage CNC machine tool from Arnold Company.

[0047] The material used in the...

Embodiment 3

[0050] DC-035 Slab CO produced by German Rofin-Sinar Company is used for welding 2 A laser acts as a heat source. The laser's stable output power ranges from 350W to 3500W, and it adopts RF radio frequency excitation. The cylindrical mirror forms an unstable resonant cavity, and the outgoing window adopts thermally stable gemstones. Use the beam shaping element to shape the square light spot output by the laser into a circular symmetrical beam, which is transmitted to the processing position through the light guide system, and focused by the oxygen-free copper parabolic mirror. The beam mode is close to TEM 00 mold. The specific parameters are: beam diameter φ=17mm, K f =3.7mm·mrad, K≥0.95, focusing lens is copper parabolic mirror with focal length f=300mm, focal spot diameter D=0.2684mm, divergence angle θ=52.0175mrad, M 2 =1.01, depth of focus Z R =5.0537mm. The motion system is a five-axis linkage CNC machine tool from Arnold Company.

[0051]The material used in the ...

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Abstract

The invention discloses an IC10 alloy connecting and repairing method for controlling a dendrite growth direction through lasers and belongs to the field of laser material processing. Firstly, in the process of welding, the welding direction needs to be kept parallel to the dendrite growth direction of IC10 directional solidification alloy. Secondly, the range of laser welding parameters is that laser power density is 1.41*106-3.01*106W / cm<2>, the defocusing amount is zero, scanning speed is 0.5-2.5m / min, and the thickness of an IC alloy plate is 0.5-1.7mm. In the process of welding, Ar gas serves as protective gas, gas flows are 10-30L / min, the direction of the protective gas input to a welding zone is contrary to the welding direction, and namely is over against the direction of laser scanning. A laser device is adopted for scanning welding seam positions of the IC10 alloy or positions needing to be repaired, corresponding positions of components and parts of the IC10 alloy are melted to form a liquid state molten pool under the action of the lasers, and the liquid metal is again solidified to form welding seams due to reduction of temperature after the lasers leave the scanning positions. The method is high in stability, simple in technology and small in deformation and has practical engineering significance.

Description

technical field [0001] The invention relates to a welding and repairing method for laser-controlled dendrite growth direction for connection between high-temperature structural material IC10 alloy parts and failure parts, and belongs to the field of laser material processing. Background technique [0002] Because directionally solidified alloys eliminate or reduce the transverse grain boundaries perpendicular to the principal stress axis, the high-temperature creep and durability properties of the material are significantly improved, and the service life of key components such as aero-engines and gas turbine blades can be extended. Compared with nickel-based superalloys, directionally solidified nickel-based superalloys are cheap, so they are the preferred materials for high-temperature components such as aero-engines. Taking directionally solidified Rene80 alloy material as an example, its tensile properties and creep life are respectively increased by 10-15% and 1-3 times ...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/14B23K26/34
Inventor 张冬云赵志英赵恒李丛洋
Owner BEIJING UNIV OF TECH
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