Maraging Steel 3D Printing
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What is Maraging Steel?
Martensitic aging steel is a kind of high strength and high hardness steel, which combines the high hardness of martensitic steel with the high strength of aging treatment. Aging treatment causes precipitation hardening of steel through prolonged exposure to higher temperatures, thereby increasing tensile strength without compromising ductility.
The carbon content of maraging steel is very low, and its strength mainly comes from the effect of alloying elements. The use of 3D printing technology can produce complex shape martensitic aging steel parts, which are widely used in aerospace, automotive and other fields with high strength requirements.
3D Printing in Maraging Steel at a Glance
| Application | Tooling inserts, casting and forging dies, pump impellers |
| Advantages | High strength and hardness, high fatigue strength, good machinability, corrosion-resistant |
| Disadvantages | High cost |
| Lead Time | 3 days |
| Maraging Steel Price | $$$ |
| Minimum Feature Size | Typically 0.016” - 0.020” (0.406 mm - 0.508 mm) |
| Layer Height | 0.0012” - 0.0016" (0.0305 mm - 0.04064 mm) |
| General Tolerances | 0.005” (0.127 mm) is possible for the first inch of height. For every inch thereafter, an additional 0.002” (0.0508 mm) is added to the tolerance. |
| Max Part Size | 10” x 10” x 10” (254 mm x 254 mm x 254 mm) |
Maraging Steel - MS1
MS1 martensitic aging steel, also known as 300-grade martensitic aging steel, is the second alloy material in the four common martensitic aging steel alloys, with high strength and high hardness, can be widely used in tools, rocket engines, gears and other high strength and hardness requirements, is one of the important structural materials.
Maraging Steel - MS1 Properties
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm^3) |
|---|---|---|---|---|
| 1200 ± 100 | 1100 ± 100 | 12 ± 4 | 311 to 344 | 8–8.1 |
Finishes
Parts made of 3D printed maraging steel can reach a relative density of 100%, and can be processed and polished for various subsequent processes.
Standard: Standard post-treatment includes: removing the support structure during printing and using sandblasting to obtain an even appearance.
Numerical control machining: According to actual needs, precision machining or polishing can be carried out through numerical control technology to generate a specific surface shape or structure. For example, a surface roughness of 0.5 micron can be achieved through CNC polishing; Or through CNC milling to obtain a specific hole position tolerance.
Cost-saving Design Tips
In order to reduce the cost of 3D printing of maraging steel, the following points can be considered:
- Follow the DFM principle during design to ensure that there are enough powder discharge holes inside the model.
- Consider support structure to prevent warping.
- Reasonable selection of materials, martensitic aging steel price is high, most occasions do not need its ultra-high hardness and strength, can consider more economical materials.
- Optimize the design to reduce unnecessary material waste.
- Consult experts to take full advantage of 3D printing and reduce the number of parts.