GB/T 43484-2023
High temperature alloy powder for laser powder bed fusion for additive manufacturing (English Version)
- Standard No.
- GB/T 43484-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 43484-2023
- Introduction
1. Background and significance of the standard
GB/T 43484—2023 "High-temperature alloy powders for laser powder bed fusion in additive manufacturing" is China's first national standard for high-temperature alloy powders in the field of additive manufacturing. It aims to standardize the quality and technical requirements of high-temperature alloy powders used in the laser powder bed fusion (LPBF) process. The standard was proposed by the China Machinery Industry Federation and jointly managed by the National Technical Committee for Additive Manufacturing Standardization and the National Technical Committee for Steel Standardization.
2. Framework of the main content of the standard
Chapter number Main content 1 Scope: Specifies the scope of application and technical content of the standard. 2 Normative References: Lists relevant international and domestic standards. 3 Terms and Definitions: Defines the special terms for high-temperature alloy powders and related technologies. 4 Technical Requirements: Includes key indicators such as chemical composition, particle size and oxygen content, bulk density, and fluidity. 5 Test Methods: Detailed provisions for the testing standards and operating procedures for various properties. 6 Inspection Rules: Clarifies the sampling, inspection items and judgment rules of the product. 7 Marking, Packaging, Transportation, Storage and Documentation: specifies product identification, packaging methods and storage conditions. 8 Contents of Order or Contract: specifies the technical requirements and terms of the ordered products.
3. Interpretation of key technical requirements
Chemical Composition: The grade and chemical composition of high-temperature alloy powder must comply with the provisions of Table 1, and the allowable deviation shall be implemented in accordance with GB/T25829. Table 1 lists in detail the mass fraction ranges of nickel (Ni), iron (Fe), chromium (Cr) and other elements of different grades (such as GH3536, GH4169, etc.).
Particle Size and Oxygen Content: Products are divided into Class I and Class II, which are suitable for different LPBF process requirements. Table 2 specifies the particle size distribution and oxygen content upper limit of each category of powder to ensure that the powder performance meets the requirements of additive manufacturing.
4. Implementation Recommendations
4.1 Supply Chain Management
The supply and demand parties should specify key indicators such as chemical composition and particle size in the order form, and negotiate to determine optional parameters such as sphericity and hollow powder rate. It is recommended to use the methods in GB/T39251-2020 for sampling and testing to ensure product quality.
4.2 Equipment Compatibility
When selecting powder, users need to consider the minimum powder layer thickness (Min.Powder Layer Thickness) of the equipment to ensure that the spreading performance of the powder meets the equipment requirements. The data in Table 1 and Table 2 can provide reference for equipment selection.
4.3 Quality Control
It is recommended that manufacturers establish a complete quality control system, conduct inspections in strict accordance with the test methods in the standards, and keep complete inspection records and accompanying documents. Table 5 clarifies the sampling quantity and technical requirements for each inspection item.
GB/T 43484-2023 Referenced Document
- GB/T 11261 Steel and lron - Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method
- GB/T 1479.1 Metallic powders—Determination of apparent density—Part 1:Funnal method
- GB/T 1482-2022 Metallic powders—Determination of flow rate—Calibrated funnel methods（Hall flowmeter）
- GB/T 1724-2019 Paints,varnishes and printing inks—Determination of fineness of grind
- GB/T 19077 Particle size analysis by laser diffraction*， 2024-10-26 Update
- GB/T 25829 Permissible variations for chemical composition of superalloy products
- GB/T 35351 Additive manufacturing—Terminology
- GB/T 39251-2020 Additive manufacturing—Methods to characterize performance of metal powders
- GB/T 41978 Additive manufacturing—Test method for hollow particle ratio of metal powders
- YS/T 1297 Method for determination of sphericity of titanium and titanium alloy powders
GB/T 43484-2023 history
- 2023 GB/T 43484-2023 High temperature alloy powder for laser powder bed fusion for additive manufacturing
