1 Scope
This standard specifies the ordering requirements, manufacturing process, technical requirements, inspection rules, test methods, acceptance, quality certificate, marking and packaging etc. of shaft forgings for hydraulic turbines and hydraulic generators (including the welded shaft, hereinafter referred to as "forging").
This standard is applicable to the ordering, manufacturing and inspection of shaft forgings for hydraulic turbines and hydraulic generators.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 223 (All Parts) Methods for Chemical Analysis of Iron, Steel and Alloy
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 11345-1989 Method for Manual Ultrasonic Testing and Classification of Testing Results for Ferritic Steel Welds
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
JB/T 1581 Ultrasonic Testing for Rotor and Shaft Forgings of Steam Turbines and Turbine Generators
JB/T 4730.4-2005 Nondestructive Testing of Pressure Equipment - Part 4: Magnetic Particle Testing
JB/T 8468 Magnetic Particle Testing for Steel Forgings
JB/T 8888 Test Method for Measuring Residual Stresses by the Ring-core Method in Rotor Forgings for Turbine and Generator
3 Ordering Requirements
3.1 The Purchaser shall indicate the adopted standard, material designation, strength grade of forging, corresponding technical requirements and inspection items as well as inspection items beyond this standard as specified by the Supplier and the Purchaser in order contract or technical agreement.
3.2 The Purchaser shall provide the order drawing of forging with sampling position of mechanical property test specimen indicated.
Foreword I
1 Scope
2 Normative References
3 Ordering Requirements
4 Manufacturing Process
4.1 Smelting
4.2 Forging
4.3 Thermal Treatment
4.4 Welding
5 Technical Requirements
5.1 Chemical Compositions
5.2 Mechanical Performance
5.3 Non-destructive Testing
5.4 Dimension, Tolerance and Surface Roughness
6 Inspection Rules and Test Methods
6.1 Chemical Composition Analysis
6.2 Mechanical Performance Test
6.3 Residual Stress Determination
6.4 Non-destructive Testing
6.5 Repeat Test
6.6 Repeated Thermal Treatment
7 Acceptance and Quality Certificate
7.1 Acceptance
7.2 Quality Certificate
8 Marking and Packaging
Table 1 Chemical Compositions
Table 2 Mechanical Performance
Table 3 Permissible Deviation for Chemical Composition of Finished Products
