Additive Manufacturing Substrate Using Martensitic Self-Separation
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Solution Overview
Problem
Current additive manufacturing methods face challenges in efficiently and sustainably separating metallic components from substrates, leading to complex and costly processes that do not adequately consider resource conservation.
Innovation Solution
A method utilizing a substrate with a martensite start temperature below 140°C, which undergoes a martensitic phase transformation during cooling, inducing compressive stresses and facilitating easy separation of the component, allowing for reuse of the substrate with minimal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional additive manufacturing methods are used with standard substrates, then components can be manufactured with complex geometries, but the separation of components from substrates becomes highly complex and costly
Solution Approach 1:
The substrate material parameters are changed by selecting a steel grade with specific martensite start temperature (Ms) below 140°C. This parameter change enables the substrate to undergo martensitic transformation during cooling, generating expansion stresses that automatically separate the component from the substrate, thereby simplifying the separation process
Solution Approach 2:
The substrate undergoes a martensitic phase transition during cooling after additive manufacturing. This phase transition causes volume expansion and generates stresses that facilitate automatic separation of the component from the substrate, eliminating complex manual separation procedures
2Loss of substance
If substrates are discarded after single use, then separation complexity is reduced, but material waste increases and sustainability decreases
Solution Approach 1:
Instead of discarding the substrate after single use, the invention enables substrate recovery and reuse. The martensitic transformation and automatic separation allow the substrate to be easily retrieved and prepared for subsequent manufacturing cycles, reducing material waste and improving sustainability
Solution Approach 2:
The substrate performs self-service by automatically separating the component through martensitic transformation during cooling. This self-separation mechanism eliminates the need for complex external separation operations and prepares the substrate for reuse, reducing material consumption
3Productivity
If manual separation methods are used, then separation can be achieved, but productivity decreases and costs increase
Solution Approach 1:
The substrate automatically separates the component through martensitic transformation during the cooling process. This self-service mechanism eliminates time-consuming manual separation operations, thereby increasing productivity and reducing manufacturing cycle time
Solution Approach 2:
The invention replaces manual mechanical separation operations with an automated physical-chemical mechanism (martensitic transformation). This substitution eliminates the need for manual intervention and complex mechanical separation tools, improving productivity and reducing costs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the separation process, enables cost and material savings, and promotes sustainability by allowing for the reuse of substrates, thereby improving the efficiency and environmental impact of additive manufacturing.
Implementation Method 1
the substrate is cooled down in the component-substrate composite after the complete construction of the component to a temperature below the martensite start temperature Ms, wherein, as a result of a martensite transformation and the associated volume expansion of the metallic substrate material, a transformation stress is induced in the substrate
Implementation Method 2
as a result of a martensite transformation and the associated volume expansion of the metallic substrate material, a transformation stress is induced in the substrate
Data Source
AI summary
According to the invention, a method is provided for additively manufacturing a component, in particular a metallic component, said method having the steps of: ⋅ providing at least one substrate (I), in particular a substrate plate, the substrate being formed from one or more metallic substrate materials which has a martensite start temperature (Ms) below 140° C., the martensite start temperature (Ms) being below the manufacturing temperature (Tp); ⋅ building the component on a building surface (5) of the substrate (I) by layered application of at least one material at a manufacturing temperature (Tp) to form a component-substrate composite (7) over a boundary surface (6); ⋅ after building of the component (3) is complete, cooling at least the substrate (I) in the component-substrate composite (7) to a temperature below the martensite start temperature (Ms), wherein, as a result of martensitic transformation and the associated volume expansion of the metallic substrate material, a transformation stress is induced in the substrate (I), at least in the boundary surface (6) to the component (3); and ⋅ separating the component (3) from the substrate (I). The invention further relates to a substrate (I) for use in such a method.