Investigation on Analytical Methodsfor ChemicalCompositionsof Heavy Forgings for Power StationEquipment

The electric energy is convenient, extensive and main energy in common use. Heavy forgings for power station equipment are key parts of a set, and their chemical compositions are the foundation of other properties. Several determining methods for ladle and product analysis of correspondent industrial standards about chemical compositions of heavy forgings for 200MW power station equipment and below were compared, and their progresses were reviewed in detail. A rapid pretreatment for multi-element contents determination of carbon and middle-low alloy steels by ICP-AES was further investigated in experiments. ICP-AES was also proposed as practical analysis method of the product, and was expanded. SD-AES was proposed as a preferred choice of the industrial standards for ladle and product analysis. The methods have been applied to routine production and inspection of heavy forgings, and will service the revision of the industrial standards.