SAE AMS 7882:2003 pdf download

SAE AMS 7882:2003 pdf download Tungsten Carbide-Cobalt Chrome Powder Agglomerated and Sintered
1. SCOPE:
1.1 Form: This specification covers tungsten carbide-cobalt chrome in the form of powder.
1.2 Application: This powder has been used typically for producing thermal spray coatings to provide wear and fretting resistant surfaces with a high level of corrosion resistance, but usage is not limited to such applications.
2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.
2.1 SAE Publications:
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org
AMS 2448 Application of Tungsten Carbine Coatings on Ultra High Strength Steels,High Velocity Oxygen/Fuel Process
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org.
ASTM B 215 Sampling Finished Lots of Metal Powders
3. TECHNICAL REQUIREMENTS:
3.1 Composition:
Shall conform to the percentages by weight shown in Table 1, determined by methods acceptable to purchaser.
3.2 Condition:
As manufactured.
3.3 Properties:
Powder shall conform to the following requirements:
3.3.1 Particle Size Distribution: Shall be as shown in Tables 2 and 3: each lot shall show the cumulative volume percentages when measured by laser light scattering method (See 8.2).
3.3.2 Thermal Spraying: Powder shall be capable of producing spray coatings to meet the requirements of AMS 2448. Purchaser and vendor shall agree upon standards for acceptance.
3.4 Quality: Powder, as received by purchaser, shall be thoroughly blended, uniform in color and quality, dry, free flowing and free from foreign materials, clumps and imperfections detrimental to its spraying qualities.
4. QUALITY ASSURANCE PROVISIONS:
4.1 Responsibility for Inspection: The vendor of powder shall provide all samples for vendor’s tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the powder conforms to the specified requirements.
4.2 Classification of Tests: Tests for all technical requirements are acceptance tests and preproduction tests and shall be performed prior to or on the initial shipment of powder to a purchaser, on each lot, when a change in ingredients and/or processing requires approval by the cognizant engineering organization (see 4.4.2), and when purchaser deems confirmatory testing to be required.
4.3 Sampling and Testing: Shall be in accordance with ASTM B 215; sufficient powder shall be taken from each lot to perform all required tests. The number of determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three. 4.3.1 When purchaser and vendor have agreed upon a statistical sampling plan, sampling shall be in accordance with such plan in lieu of sampling as in 4.3 and the report of 4.5 shall state such a plan was used.