GB/T 25390-2024 Wind energy generation systems - Spheroidal graphite cast iron for wind turbines
1 Scope
This document specifies the designation and classification, order information, technical requirements, test methods, inspection rules, and marking, corrosion protection, packaging, transportation and storage of spheroidal graphite iron castings for wind turbines.
This document is applicable to the manufacturing, inspection, and acceptance of spheroidal graphite iron castings used in wind turbines for wind energy generation systems
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.3~GB/T 223.74 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 231 (all parts) Metallic materials - Brinell hardness test
GB/T 1348 Spheroidal graphite iron castings
GB/T 5611 Foundry terminology
GB/T 5612 Code for representing cast iron
GB/T 6060.1 Surface roughness comparison specimen - Part 1: Casting surface
GB/T 6414-2017 Castings - Dimensional tolerances and geometrical tolerances and machining allowances
GB/T 9441 Metallographic test method for spheroidal graphite cast iron
GB/T 9444 Steel and iron castings - Magnetic particle inspection
GB/T 9445-2015 Non-destructive testing - Qualification and certification of NDT personnel
GB/T 11351-2017 Mass tolerances of casting
GB/T 15056 Casting surface roughness - Appraising method
GB/T 34904 Spheroidal graphite iron castings - Ultrasonic testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5611 and the following apply.
3.1
ductile iron; nodular graphite iron; spheroidal graphite cast iron
cast iron with iron, carbon, and silicon as the basic elements, in which carbon primarily exists in the form of spheroidal graphite
3.2
side-by-side cast sample
sample cast simultaneously with the casting using the same gating system, arranged side by side with the casting during pouring
3.3
solid solution strengthened
phenomenon where the strength and hardness of a metal are increased by the formation of a solid solution due to the dissolution of solute atoms into the metal matrix
3.4
solid solution strengthened ferrite spheroidal graphite cast iron
spheroidal graphite cast iron primarily strengthened through silicon solid solution, with a ferrite matrix as the dominant phase
3.5
dross
fine inclusions (such as oxides and sulfides) located at the rim zone of a casting, and slag that has a lower density than the molten metal and accumulates on the surface of the melt bath or casting
4 Designation and classification method for spheroidal graphite cast iron for wind turbines
4.1 The designation method for spheroidal graphite cast iron shall meet the requirements of GB/T 5612.
4.2 Cast samples are classified into three types: separated test bar of casting, cast-on sample, and side-by-side cast sample, with dimensions in compliance with GB/T 1348.
4.3 The mechanical properties of spheroidal graphite cast iron shall be determined by testing the mechanical properties of cast samples.
4.4 The spheroidal graphite cast iron commonly used for wind turbines is primarily classified into two types: ferritic-pearlitic spheroidal graphite cast iron and solid solution strengthened ferrite spheroidal graphite cast iron.
5 Order information
5.1 Ordering information
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Designation and classification method for spheroidal graphite cast iron for wind turbines
5 Order information
5.1 Ordering information
5.2 Special requirements
6 Technical requirements
6.1 General
6.2 Ferritic-pearlitic spheroidal graphite cast iron for wind turbines
6.3 Solid solution strengthened ferrite spheroidal graphite cast iron for wind turbines
6.4 Visual quality requirements
6.5 Defect repair
6.6 Requirements for magnetic particle testing (MT)
6.7 Requirements for ultrasonic non-destructive testing (UT)
6.8 Dimensional tolerances and mass tolerances of castings
7 Test methods
7.1 Material test methods
7.2 Non-destructive testing
7.3 Visual inspection
7.4 Dimensional inspection
7.5 Casting mass
8 Inspection rules
8.1 Inspection category
8.2 End-of-manufacturing inspection
9 Marking, corrosion protection, packaging, transportation and storage
9.1 Casting marking
9.2 Corrosion protection
9.3 Packaging, storage and transportation
10 Delivery quality certificate
Annex A (Informative) Solid solution strengthened ferrite spheroidal graphite cast iron QT500-14
Bibliography
GB/T 25390-2024 Wind energy generation systems - Spheroidal graphite cast iron for wind turbines
1 Scope
This document specifies the designation and classification, order information, technical requirements, test methods, inspection rules, and marking, corrosion protection, packaging, transportation and storage of spheroidal graphite iron castings for wind turbines.
This document is applicable to the manufacturing, inspection, and acceptance of spheroidal graphite iron castings used in wind turbines for wind energy generation systems
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.3~GB/T 223.74 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 231 (all parts) Metallic materials - Brinell hardness test
GB/T 1348 Spheroidal graphite iron castings
GB/T 5611 Foundry terminology
GB/T 5612 Code for representing cast iron
GB/T 6060.1 Surface roughness comparison specimen - Part 1: Casting surface
GB/T 6414-2017 Castings - Dimensional tolerances and geometrical tolerances and machining allowances
GB/T 9441 Metallographic test method for spheroidal graphite cast iron
GB/T 9444 Steel and iron castings - Magnetic particle inspection
GB/T 9445-2015 Non-destructive testing - Qualification and certification of NDT personnel
GB/T 11351-2017 Mass tolerances of casting
GB/T 15056 Casting surface roughness - Appraising method
GB/T 34904 Spheroidal graphite iron castings - Ultrasonic testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5611 and the following apply.
3.1
ductile iron; nodular graphite iron; spheroidal graphite cast iron
cast iron with iron, carbon, and silicon as the basic elements, in which carbon primarily exists in the form of spheroidal graphite
3.2
side-by-side cast sample
sample cast simultaneously with the casting using the same gating system, arranged side by side with the casting during pouring
3.3
solid solution strengthened
phenomenon where the strength and hardness of a metal are increased by the formation of a solid solution due to the dissolution of solute atoms into the metal matrix
3.4
solid solution strengthened ferrite spheroidal graphite cast iron
spheroidal graphite cast iron primarily strengthened through silicon solid solution, with a ferrite matrix as the dominant phase
3.5
dross
fine inclusions (such as oxides and sulfides) located at the rim zone of a casting, and slag that has a lower density than the molten metal and accumulates on the surface of the melt bath or casting
4 Designation and classification method for spheroidal graphite cast iron for wind turbines
4.1 The designation method for spheroidal graphite cast iron shall meet the requirements of GB/T 5612.
4.2 Cast samples are classified into three types: separated test bar of casting, cast-on sample, and side-by-side cast sample, with dimensions in compliance with GB/T 1348.
4.3 The mechanical properties of spheroidal graphite cast iron shall be determined by testing the mechanical properties of cast samples.
4.4 The spheroidal graphite cast iron commonly used for wind turbines is primarily classified into two types: ferritic-pearlitic spheroidal graphite cast iron and solid solution strengthened ferrite spheroidal graphite cast iron.
5 Order information
5.1 Ordering information
Contents of GB/T 25390-2024
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Designation and classification method for spheroidal graphite cast iron for wind turbines
5 Order information
5.1 Ordering information
5.2 Special requirements
6 Technical requirements
6.1 General
6.2 Ferritic-pearlitic spheroidal graphite cast iron for wind turbines
6.3 Solid solution strengthened ferrite spheroidal graphite cast iron for wind turbines
6.4 Visual quality requirements
6.5 Defect repair
6.6 Requirements for magnetic particle testing (MT)
6.7 Requirements for ultrasonic non-destructive testing (UT)
6.8 Dimensional tolerances and mass tolerances of castings
7 Test methods
7.1 Material test methods
7.2 Non-destructive testing
7.3 Visual inspection
7.4 Dimensional inspection
7.5 Casting mass
8 Inspection rules
8.1 Inspection category
8.2 End-of-manufacturing inspection
9 Marking, corrosion protection, packaging, transportation and storage
9.1 Casting marking
9.2 Corrosion protection
9.3 Packaging, storage and transportation
10 Delivery quality certificate
Annex A (Informative) Solid solution strengthened ferrite spheroidal graphite cast iron QT500-14
Bibliography
