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Standard Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors
Automaticky preložený názov:
Štandardné špecifikácie pre odsávaného Steel výkovky , Alloy , diferenčné tepelne spracované , pre turbíny Rotory
NORMA vydaná dňa 1.3.2006
Označenie normy: ASTM A940/A940M-06
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.3.2006
Kód tovaru: NS-4907
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
differential heat treatment, steel forgings, turbine rotor, vacuum treated steel, ICS Number Code 77.140.85 (Iron and steel forgings)
1. Scope | ||||||||||||||
1.1 This specification covers vacuum treated, alloy steel forgings, differentially heat treated for turbine rotors. 1.2 Differential heat treatment of a rotor forging involves subjecting two portions of the forging concurrently to two different austenitizing temperatures followed by two different cooling rates for normalizing and quenching, and then tempering, to achieve creep resistance in the high pressure (HP) portion and high toughness in the low pressure (LP) portion. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. |
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2. Referenced Documents | ||||||||||||||
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