MATING SURFACES.
OVERCOMING DISCONTINUITIES.
CONNECTING MATERIALS.
We develop solid-state welding technologies that endure extreme environments — connecting materials into one reliable structure.
About S-Welding
S-Welding Co., Ltd. is a materials engineering startup specializing in solid-state welding — a process that joins metals without melting.
Our Capabilities
- •Perfectly bonded interfaces that maintain stability under extreme temperatures and pressures
- •Advanced surface treatment and diffusion control technologies
- •Lightweight, high-efficiency, and long-lifespan thermal systems
Our mission is to overcome discontinuities between different materials and deliver next-generation thermal management solutions for the most demanding industrial applications.
Products
Innovative thermal management solutions for extreme environments
Industrial Applications of PCHE
Wide range of applications from cryogenic to high-temperature
Printed Heat Exchanger
A compact heat exchanger fabricated by diffusion welding of micro-channel-etched plates
Pulsating Heat Pipe
Ultra-thin PHP prototype demonstrating feasibility
Industrial Applications of Printed Circuit Heat Exchanger
Wide range of applications from cryogenic to high-temperature with high pressure
Operating temperature
–200 to 900 °C
Pressure limit
100 MPa
Applicable industry
Hydrogen, LNG, aerospace, nuclear, and chemical plant
Printed Heat Exchanger
Printed heat exchanger: A compact heat exchanger fabricated by diffusion welding of micro-channel-etched plates
High heat transfer per volume
Delivers equivalent performance to shell and tube heat exchanger (STHE) with only 15% of volume
Diffusion welding
Similar microstructure ensures reliability under extreme conditions
Operating range
Wide range of applications from cryogenic to high-temperature with high pressure (Max. 900 °C and 100 MPa)
Pulsating Heat Pipe
Ongoing development: ~0.3 mm ultra-thin PHP prototype demonstrating feasibility
Technologies
Advanced solid-state welding technologies for next-generation applications
Solution: A Novel Method for Diffusion Welding of Ni-based Superalloys
Surface treatment approach to mitigate secondary precipitation at diffusion interfaces
Minimized Secondary Precipitates along Interfaces
EBSD and TEM analysis showing reduction of secondary precipitates
Mechanical Properties Compared to Industrial Standard
Validated safety margin with over 30% higher mechanical robustness
Solution: A Novel Method for Diffusion Welding of Ni-based Superalloys
Surface treatment approach to mitigate secondary precipitation at diffusion interfaces
- •Surface Ni enrichment to maintain Ksp > Q, promoting solid solution stability
- •Inherent dissolution of interfacial precipitates during diffusion welding
- •Compositional homogenization through integrated bonding and post-weld annealing
Minimized Secondary Precipitates along Interfaces
EBSD:
Reduction of the secondary precipitates along the interface facilitate the grain boundary migration across the interfaces
TEM:
Secondary precipitates are sparsely distributed along the interfaces (c.f. page 5: conventional method)
Mechanical Properties Compared to Industrial Standard
Validated safety margin: Over 30% higher mechanical robustness (tensile/creep/fatigue) compared to conventional diffusion weldment
- •Derived from direct comparison to ASME Sec. III Div. 5 and industrial references
- •Enables downsizing of thermal systems by securing structural margin under high-temperature operation
Contact
For collaboration or technical inquiries, please get in touch using the form below.
You can also reach us at: jongbae.hwang@s-welding.co.kr