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Binder jetting additive manufacturing of 316L stainless-steel green parts with high strength and low binder content: Binder preparation and process optimization
- Source :
- Journal of Materials Processing Technology. 291:117020
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Recently, binder jetting additive manufacturing (BJAM) was used to manufacture complex metal parts in an economical and large-scale way. However, the usage of resin to bond metal powder renders as-printed green parts with low strength, which is potential to cause the structural damages of final parts during post treatments. To overcome the intractable problem, a self-developed binder mainly consisting of A-stage phenolic resin was explored for BJAM to achieve relatively high-strength as-printed green parts. The binder can be cured as a C-stage phenolic resin with 190 ℃ and then provide a high strength for the green parts. The effect of layer thickness and binder saturation on the strength, dimensional accuracy, and surface roughness of the BJAM-printed 316 L stainless-steel green samples using the developed binder was investigated systematically. With the optimized parameters (a layer thickness of 100 μm and a binder saturation of 30.2 %), green samples can possess the ultimate bending strength (UBS) of 10.08 MPa and the ultimate compressive strength (UCS) of 25.56 MPa, which are beneficial for the structural stability of the printed samples during subsequent treatments. A reduction in strength and an increase in roughness are observed with increasing the layer thickness for the as-printed green samples. An increment in binder saturation results in the improvement in strength and surface roughness of the green samples. The relationships between the binder and the mechanical performance of the green samples were discussed from the viewpoint of the uneven distribution of binder in depth. This work explored a promising binder with a low saturation for BJAM to fabricate 316 L green parts with desirable mechanical strength and acceptable surface roughness.
- Subjects :
- 0209 industrial biotechnology
Materials science
Metals and Alloys
02 engineering and technology
Surface finish
Layer thickness
Industrial and Manufacturing Engineering
Computer Science Applications
020303 mechanical engineering & transports
020901 industrial engineering & automation
Compressive strength
0203 mechanical engineering
Flexural strength
Modeling and Simulation
Ceramics and Composites
Surface roughness
Metal powder
Process optimization
Composite material
Saturation (chemistry)
Subjects
Details
- ISSN :
- 09240136
- Volume :
- 291
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Processing Technology
- Accession number :
- edsair.doi...........a443cd2f8713ea3a3b0434b55df2e55e