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Title:
METHOD FOR EVALUATING CLEANLINESS OF METAL MATERIAL
Document Type and Number:
Japanese Patent JP2001159627
Kind Code:
A
Abstract:

To provide a method which corresponds not only to enhancement in recent metallurgical technique but also to substantial improvements in the cleanliness of a metal material, such as steel or the like and high in reliability.

(N) sample pieces are collected from a metal material to be analyzed, and are electrolyzed to obtain residues, and these residues are elutriated to separate impurities contained in respective sample pieces and the maximum diameters aj (j=1, n) of impurities are measured with respect to (n) sample pieces and the estimated maximum diameter amax of the impurities contained in the metal material to be analyzed is calculated, to evaluate the cleanliness of the metal material to be analyzed.


Inventors:
NURI YOSHIO
KITANO SHUHEI
Application Number:
JP1999000342148
Publication Date:
June 12, 2001
Filing Date:
December 01, 1999
Export Citation:
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Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
G01N1/04; G01N1/28; G01N33/20; (IPC1-7): G01N33/20; G01N1/04
Attorney, Agent or Firm:
岸田 正行 (外1名)