Kawasaki Steel Corporation

Jfe Steel Corporation

Sadao Hasuno

Yasushi Kato

Susumu Satoh

Yoshihiro Yazawa

Misako Tochihara

Takeshi Yokota

Osamu Furukimi

Hiroshi Shimizu

Fusao Togashi

Keiichi Yoshioka

Keiichiro Takitani

Mitsukuni Yamagata

Kuniaki Motoda

Takeshi Yokoto

The invention provides a Fe&#x2014;Cr alloy structure containing Cr of about 6% or more by mass but about 25% or less by mass, having a corrosion-resistant paint film containing metal powder having ionization tendencies greater than iron, with a content of the metal powder of about 20% or more by volume but about 60% or less by volume in a dry paint film, with a dry film thickness of about 5 &#x3bc;m or more but about 100 &#x3bc;m or less; and a manufacturing method thereof; whereby excellent corrosion resistance and excellent adhesion is provided.

Fe-Cr alloy structure with excellent corrosion resistance and excellent adhesion, and manufacturing method thereof

The present invention provides a stainless steel being excellent in workability, corrosion resistance and antibacterial property. To be more specific, a stainless steel containing 10 wt % or more of Cr is rendered to contain 0.0001-1 wt % of Ag, or further one or more members selected from Sn: 0.0002-0.02 wt %, Zn: 0.0002-0.02 wt %, Pt: 0.0002-0.01 wt %, and, in addition, is rendered to dispersedly contain a total of 0.001 % or more in an area percentage of one or more members of a silver particle, a silver oxide and a silver sulphide each having a mean grain diameter of 500 &mgr;m or less. To disperse the silver particle, silver oxide and silver sulphide uniformly, the casting rate of continuous casting is preferably controlled to range from 0.8 to 1.6 m/min.

Stainless steel having excellent antibacterial property and method for producing the same

The present invention provides a stainless steel having superior corrosion resistance, antibacterial properties, and durability, the antibacterial properties being maintained after surface treatments commonly performed including, for example, polishing. In particular, the stainless steel contains not less than 10 percent by weight of chromium, 0.001 to 0.30 percent by weight of silver, or further contains 0.001 to 1.0 percent by weight of vanadium. In addition, not less than 0.0005 weight percent of a silver oxide, the amount thereof being not more than 1.1 times that of the silver, is dispersed in the stainless steel. In order to homogeneously disperse the silver oxide in the stainless steel, when continuous casting of molten steel is performed, the casting rate for the continuous casting is preferably 0.8 to 1.6 m/min. A method for manufacturing the stainless steel is also disclosed.

Stainless steel product having excellent antimicrobial activity and method for production thereof

High Cr content, P added ferritic stainless steel having improved

An Fe-Cr-Al alloy having excellent oxidation resistance and high temperature brittleness resistance comprises:

Fe-Cr-Al alloy, catalytic substrate comprising the same and method of

The method of producing steel pipe material for an oil well is characterized in that, as for the chemical composition of steel, B contained steel is adopted avoiding the addition of Ti which increases the values of non-metallic inclusions to decrease machinability, the value of N is limited to not more than 0.003% to be decreased in content of nitrides, coarse crystal grains due to the decreased content of N are prevented through austenizing of steel under rapid heating, so that such a steel pipe material for an oil well can be obtained that which has resistance to sulfide stress corrosion in addition to satisfactory strength and machinability.

Method of producing steel pipe material for oil well

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Chiba, Japan

Sadao Hasuno