Nkk Corporation

Yoichi Nimura

Yoshihiko Kawai

Satoshi Kinoshiro

Yoshihito Iwata

Tadashi Mochizuki

Takanori Akiyoshi

Yohichi Ishibashi

Hiroaki Miyahara

Akiko Sakashita

A method for analyzing steel which comprises: grinding an analysis area of a steel ingot; sealing the analysis area with a sealing section of a cell for generating fine particles; again grinding the analysis area, while an argon gas is introduced into the cell; irradiating a pulsed laser beam of 10.sup.8 W/cm.sup.2 or more onto the analysis area at an irradiating spot of at least 1 mm.sup.2 to generate the fine particles; moving the irradiating spot; and transferring the generated fine particles by the argon gas to a plasma emission analysis for analysis. A further method for analyzing steel comprises: solidifying a molten steel sample, forming a red-hot sample; putting the sample into a sample holding section of a sample chamber under a purified argon gas atmosphere, the sample holding section having an inner curved surface the same as a curved surface of the sample; irradiating a pulsed laser onto the sample to remove a sample surface layer of 25 .mu.m or more of the sample and to generate fine particles from the sample; and exciting the fine particles by a plasma emission analyzer to analyze the composition of the fine particles.

Method for analyzing steel and apparatus therefor

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Kawasaki, Japan

Yoichi Nimura