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Norma ASTM B917/B917M-12(2020) 1.11.2020 náhled

Doplňující informace

ASTM B917/B917M-12(2020)

Standard Practice for Heat Treatment of Aluminum-Alloy Castings From All Processes

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NORMA vydána dne 1.11.2020

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Informace o normě:

Označení normy: ASTM B917/B917M-12(2020)
Datum vydání normy: 1.11.2020
Kód zboží: NS-1013536
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Anotace textu normy ASTM B917/B917M-12(2020) :

This practice covers the requirements for the heat treatment of aluminum alloy castings from any casting process such as investment casting, permanent mould casting, sand casting, and others. It excludes castings that are used in specific aerospace applications or those made from wrought aluminum alloys. The aluminum alloys should be subjected to controlled heat treatment using the usual air chamber furnace or other heating media like lead baths, oil baths, fluidized beds, or even superheated steam. Air chambers may be oil or gas fired or may also be electrically heated but the atmosphere inside each should be controlled to prevent porosity. Quenching is normally performed by immersing castings in a hot-water bath. It is important that the furnace be calibrated before it is used initially and after any change in the furnace. Likewise, temperature-measurement systems should be regularly checked for accuracy.

Keywords:

aluminum alloys, centrifugal casting, investment casting, permanent mold casting, precipitation heat treatment, rheocast casting, sand casting, solution heat treatment, squeeze casting, thixocast casting,, ICS Number Code 25.200 (Heat treatment),77.150.10 (Aluminium products)

Doplňující informace

1. Scope

1.1?This practice covers, when specified by material specification or purchase order, the heat treatment of aluminum alloy castings from all casting processes.

1.1.1?The heat treatment of aluminum alloy castings used in specific aerospace applications is covered in AMS 2771 and specific AMS material specifications.

1.1.2?The heat treatment of wrought aluminum alloys is covered in Practice B918/B918M.

1.2?The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

1.3?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

B618/B618M-18e1	Standard Specification for Aluminum-Alloy Investment Castings (Includes all amendments and changes 4/2/2021).
B557-15(2023)	Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B275-14	Standard Practice for Codification of Certain Zinc, Tin and Lead Die Castings (Withdrawn 2020)
B108/B108M-19	Standard Specification for Aluminum-Alloy Permanent Mold Castings
B26/B26M-18e1	Standard Specification for Aluminum-Alloy Sand Castings (Includes all amendments and changes 4/2/2021).
B686/B686M-18	Standard Specification for Aluminum Alloy Castings, High-Strength
B955/B955M-18	Standard Specification for Aluminum-Alloy Centrifugal Castings
B918/B918M-20a	Standard Practice for Heat Treatment of Wrought Aluminum Alloys (Includes all amendments and changes 1/14/2021).
B881-17	Standard Terminology Relating to Aluminum- and Magnesium-Alloy Products
B969-10	Standard Specification for Aluminum-Alloy Castings Produced by the Squeeze Casting, Thixocast and Rheocast Semi-Solid Casting Processes
G110-92(2022)e2	Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution (Includes all amendments and changes 1/31/2023).
H35.1	Alloy and Temper Designation Systems for Aluminum Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http://www.aluminum.org.
AMS 2771	Heat Treatment of Aluminum Alloy Castings
B557M-15(2023)	Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)

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