Repair
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Repair
High precision with robotic automation | Higher grade materials applicable than conventional welding | Minimal heat-affected zone with laser-based repair
PROCESS
Total 5 steps from 3D scanning to inspection
01
3D Scanning
Scan damaged components using high-precision 3D scanner to obtain shape data
02
Design
Based on obtained scan data compare with original component shape and design modeling for parts requiring repair
03
DED Repair
Apply DED 3D printing method based on design data to repair damaged parts
04
Post-Processing
Completed repair components undergo additional processing according to customer requirements
05
Inspection
External shape inspection of completed repair components and integrity & reliability review through quality testing
Limitations of Conventional Repair Methods
When repairing damaged turbine blades using conventional TIG welding, the high heat input can induce cracking in the base material, making reliable repair difficult.
By applying LP-DED technology together with GODTECH’s additive-manufacturing-dedicated material, Alloy 939, heat input and the heat-affected zone can be minimized while forming an excellent bonding interface with the base material, enabling the repair of damaged components without cracks or defects.
Base Material Grade
Grade A
Repair Material Grade
Repair Grade A
Work Method
Approx. 1,080-1,160 MPa
Characteristics
Excellent durability
Characteristics & Content
A method of spraying thin powder and selectively melting it
Mainly used for manufacturing high-precision/high-strength metal components.
Bonding interface between the parent material and the repair part (SEM Image)
Before/after repair images
Verification of repair part using LP-DED technology (test specimen)
After applying LP-DED to deposit Alloy 939 onto the 247LC base material and conducting tensile testing, fracture occurred in the base material (247LC) rather than at the bonding interface. This result demonstrates excellent interfacial bonding characteristics and confirms that the repaired region exhibits superior mechanical properties compared to the 247LC substrate.
Following heat treatment of the 247LC base material, EBSD and KAM analyses confirmed the absence of cracks or defects at the bonding interface and within the repaired region, indicating the formation of a sound and structurally reliable repair zone.
LP-DED Repair Department Non-Destructive Testing
3D CT Scanning was performed to evaluate the quality and soundness of the repaired turbine blade using LP-DED, and it was confirmed that the repaired part was formed without any cracks or defects inside.
