AS ISO ASTM 52904:2021 pdf free

09-06-2021 comment

AS ISO ASTM 52904:2021 pdf free.Additive manufacturing – Process characteristics and performance – Practice for metal powder bed fusion process to meet critical applications.
5 Feedstock and Powder Batches
5.1 The material supplier shall package the powder in containers capable of preventing moisture from penetrating the containers. No other materials including desiccant bags, labels, or tags shall be placed inside the containers in contact with the powder.
5.2 All feedstock shall have a certificate of conformance from the material supplier indicating that the feedstock meets the purchase specification requirements.
5.3 Metal powder shall be purchased from an approved material supplier on the QMS (Quality Management Systems (see £3)), an ASL (Approved Supplier List), or a customer-directed material supplier. Powder shall be verified for conformance to the material specification. Third-party certification of powder may be used. Guide F3049, ISO 4497, and ISO 13320 provide guidance on the measurement of particle size distribution.
5.4 The component manufacturer shall have a feedstock material specification against which feedstock can be ordered and tested. Feedstock used for qualification purposes may require a limited reused powder such that the powder utilized for one qualification build to another remains as consistent as practical (for example, by using virgin feedstock as the purpose of the qualification is to check the consistency of machine operation over time).
5.4.1 A feedstock material specification shall include, but not be limited to, chemical composition, particle size distribution, and manufacturing methodology.
5.5 Powder shall be stored in environmental containment to prevent contamination and moisture absorption.
5.6 Used powder is allowed (see for requirement on used powder that is processed with ceramic recoater blade). The proportion of virgin to used powder shall be recorded and reported for each production run on the manufacturing plan (Section 10). Automated powder feed systems may not allow the proportion of virgin to used powder to be accurately measured and recorded on the manufacturing plan. In such systems the feedstock shall be considered used powder. The maximum number of times that used powder can be consumed as well as the number of times any portion of a powder lot can be processed in the build chamber shall be validated in accordance with 73. After a build cycle, any remaining used powder may be blended with virgin powder to maintain a powder quantity large enough for the next build cycle. The critical powder attributes impacting qualifications in accordance with L3 shall be analyzed regularly. All used powder shall be sieved with a sieve having a mesh size appropriate for removing any agglomerations. All powder sieves used to manufacture parts shall have a certificate of conformance that they were manufactured to ISO 9044 or Specification Eli.
6 Personnel Requirements
6.1 Personnel competency requirements in ISO 13485 shall apply, including appropriate education, training, skills, and experience.
6.2 Manufacturing manager, machine operator, or build programmer (as defined in Section 3) shall be trained by the machine manufacturer or qualified agency for PEW machine hardware and software, where appropriate.AS ISO ASTM 52904 pdf download.

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