| 摘要 |
PROBLEM TO BE SOLVED: To improve the ridging resistance of a ferritic stainless steel without deteriorating surface characteristic. SOLUTION: With respect to oxide inclusions contained in the ferritic stainless steel, their average diameter in a shape approximating to sphere is regulated to <=2μm and Al2 O3 concentration is regulated to <=30 wt.%, and further, the average density of these fine oxide inclusions in the plane one-fourth the thickness of a plate is controlled to <=0.01 pieces/μm<2> . It is desirable to regulate the amount of 0 in the steel to <=40 ppm.
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