US2004187983A1PendingUtilityA1

Pure titanium building material and method of manufacturing the same

Assignee: KOBE STEEL LTDPriority: Mar 20, 2003Filed: Mar 16, 2004Published: Sep 30, 2004

Est. expiryMar 20, 2023(expired)· nominal 20-yr term from priority

Inventors:Takashi Yashiki

C22C 14/00C22F 1/183C23C 8/10C23G 1/10

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References

Claims

Abstract

A pure titanium building material having high secular discoloration resistance is formed of pure titanium having an Fe content of 0.08% by mass or below, a Nb content of 0.02% by mass or below, and a Co content of 0.02% by mass or below.

Claims

exact text as granted — not AI-modified

What is claimed is:  
     
         1 . A pure titanium building material formed of pure titanium having an Fe content of 0.08% by mass or below, a Nb content of 0.02% by mass or below, and a Co content of 0.02% by mass or below.  
     
     
         2 . The pure titanium building material according to  claim 1  having a surface oxide film of 170 Å or blow in thickness.  
     
     
         3 . A pure titanium building material manufacturing method comprising the steps of: 
 forming a pure titanium building material of pure titanium having an Fe content of 0.08% by mass or below, an Nb content of 0.02% by mass or below and a Co content of 0.02% by mass or below; and    pickling the pure titanium building material; and    heating the pickled pure titanium building material at a temperature X (° C.) in the range of 130 to 280° C. for a heating time T (min) so as to meet a condition expressed by: T≧239408×X −2.3237 .

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