General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 7216-2023
Introduction
GB/T 7216-2023 "Gray Iron Metallographic Examination" is a Chinese national standard that specifies the requirements and methods for the metallographic examination of gray cast iron.
This standard provides guidelines for evaluating the microstructure and properties of gray cast iron, which is widely used in various industries such as automotive, machinery, and construction. The metallographic examination plays a crucial role in ensuring the quality and performance of gray cast iron components.
The standard covers the preparation of metallographic specimens, including cutting, grinding, polishing, and etching. It also includes the observation and analysis of the microstructure using optical microscopy and the determination of various microstructural characteristics such as graphite morphology, matrix structure, and the presence of various phases.
By following the guidelines provided in GB/T 7216-2023, manufacturers and quality control personnel can effectively evaluate the quality and performance of gray cast iron products. This standard helps in identifying any defects or inconsistencies in the microstructure, providing valuable information for process optimization and quality improvement.
Overall, GB/T 7216-2023 "Gray Iron Metallographic Examination" is an essential standard for the evaluation and quality control of gray cast iron. It ensures the reliability and consistency of gray cast iron products, contributing to the overall development and advancement of industries that rely on this material.
GB/T 7216-2023 history
2023GB/T 7216-2023 Metallographic examination of gray cast iron
2009GB/T 7216-2009 Metallographic test for gray cast iron