GB/T 45753-2025 in English
VALIDAdditive manufacturing—Specification for functionally graded additive manufacturing process
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Within 1 day
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| Standard No: | GB/T 45753-2025 |
| Document status: | VALID |
| Title in English: | Additive manufacturing—Specification for functionally graded additive manufacturing process |
| Title in Chinese: | 增材制造 功能梯度增材制造工艺规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-12-01 |
| Chinese Classification: | J39-Non-traditional processing technology |
| Professional Classification: | GB-National Standard |
| Related Topics: | additive manufacturing
material manufacturing Gradient Gradient Box and the gradient of Gradient Gradient Peak gradient table additive manufacturing additive Increased edition hardness gradient Density testing for metal additive manufacturing |
《GB/T 45753-2025增材制造 功能梯度增材制造工艺规范》由TC562（全国增材制造标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
Core Value and Technological Breakthrough of the Standard
As my country's first special process standard for functional gradient additive manufacturing (FGAM), GB/T 45753-2025 has systematically constructed a standardized technical framework for material component gradient, structural gradient and their composite systems for the first time. The standard innovatively proposes a dual classification system of gradient dimension (one-dimensional/two-dimensional/three-dimensional) and continuity (continuous/discontinuous), providing technical specifications for the manufacturing of gradient functional components in the fields of aerospace, biomedicine, etc.
Gradient Manufacturing Classification System
| Classification Dimension | Type | Technical Characteristics | Typical Applications |
|---|---|---|---|
| Material Components | Single Material Gradient | Porosity/Microstructure Gradient Change | Stiffness Gradient of Orthopedic Implants |
| Multi-Material Gradient | Gradual Change of Two or More Material Components | Turbine Blade Heat Resistance Gradient | |
| Gradient Dimension | One-Dimensional Gradient | Linear Change in One Direction | Thermal Barrier Coating |
| Two-dimensional gradient | Two-way change in plane | Electromagnetic shielding component | |
| Three-dimensional gradient | Three-dimensional change in space | Bionic organ scaffold |
Comparison of key process technologies
Material gradient manufacturing process capability matrix
| Process method | Active mixing | Passive mixing | Applicable materials |
|---|---|---|---|
| Material extrusion | √ | √ | Polymer/ceramic slurry |
| Powder Bed Fusion | ○ | √ | Metal Powder |
| Stereolithography | √ | ○ | Photosensitive Resin |
Quality Inspection System
- Geometric Accuracy Detection: 3D Scanner Verifies Gradient Distribution Consistency (Error ≤ 50μm)
- Material Component Analysis: EDS Spectrometer Determines Element Gradient Distribution
- Mechanical Properties Test: Nanoindenter Measures Hardness Gradient (HV0.1-HV5)
Typical Application Cases
Aircraft engine hot end components
The nickel-based alloy/ceramic gradient transition layer is prepared by directed energy deposition process to achieve continuous thermal expansion coefficient matching from base metal (800℃) to ceramic coating (1600℃), which increases the thermal cycle life by 3 times.
Dielectric functional gradient insulator
The Z-direction gradient distribution of graphene content (0-4wt%) is achieved by material jetting technology, and the dielectric constant gradually changes from 3.2 to 28.6, reducing the partial discharge by 72%.
Implementation suggestions
- When selecting new equipment, priority should be given to multi-material models with an online mixing system
- Process development requires simultaneous CAE gradient simulation and experimental verification
- Establish a gradient standard sample library for equipment process capability certification
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