This standard specifies the technical requirements, inspection rules, test methods, quality certificate and marking of vacuum-treated alloy steel forgings for the noncentral hole rotors used for more than 300MW (including 300MW) turbine generator.
This standard is applicable to the ordering, manufacturing and inspection of noncentral hole rotors forgings operating at high temperature and (or) high stress used for more than 300MW (including 300MW) turbine generator.
2 Normative References
The following standard contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed are valid. All standards are subject to revision, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these standards apply.
GB 223-(82~94) Methods for Chemical Analysis of Iron, Steel and Alloy
GB 231-84 Metallic Materials - Brinell Hardness Test
GB/T 229-94 Metallic Materials - Charpy Notch Impact Test
GB 6394-86 Metal - Methods for Estimating the Average Grain Size
GB 6395-86 Metallic Materials - Stress-rupture Test in Tension
GB 10561-89 Steel - Determination of Content of Non-metallic Inclusion - Micrographic Method Using Standard Diagrams
JB/T 7027-93 Specification for Steel Forgings for Steam Turbine Rotors (300MW ~ 600MW)
JB/T 8468-96 Magnetic Particle Testing for Steel Forgings
ZB J32 005-88 Test Method for Heat Stability of Steam Turbine Shafts and Rotor Forgings
ASTM A370-77 Test Methods for Mechanical Performance Test of Steel Product
3 Ordering Requirements
3.1 The supplier shall have a sound quality assurance system, and actual performance of producing sufficient central hole rotors forgings with similar material and size.
