US RE40,263 E1 | ||
Pearlitic steel rail having excellent wear resistance and method of producing the same | ||
Masaharu Ueda, Kitakyushu (Japan); Hideaki Kageyama, Kitakyushu (Japan); Kouichi Uchino, Kitakyush (Japan); Koji Babazono, Kitakyush (Japan); and Ken Kutaragi, Kitakyush (Japan) | ||
Assigned to Nippon Steel Corporation, Tokyo (Japan) | ||
Appl. No. 10/974,048 PCT Filed Jul. 15, 1996, PCT No. PCT/JP95/02312 § 371(c)(1), (2), (4) Date Jul. 15, 1996, PCT Pub. No. WO96/15282, PCT Pub. Date May 23, 1996. |
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Application 10/974048 is a reissue of application No. 08/676159, filed on Nov. 13, 1995, now 5,762,723, filed on Jun. 09, 1998. | ||
Claims priority of application No. 6-280916 (JP), filed on Nov. 15, 1994; application No. 7-046753 (JP), filed on Mar. 07, 1995; application No. 7-046754 (JP), filed on Mar. 07, 1995; and application No. 7-270336 (JP), filed on Oct. 18, 1995. | ||
Int. Cl. C21D 9/04 (2006.01) |
U.S. Cl. 148—581 [148/320] | 12 Claims |
8. A C: 0.86 to 1.20%,
Si: 0.10 to 1.00%,
Mn: 0.40 to 1.50%,
said chemical components Si, Cr and Mn satisfy the relation Si+Cr+Mn=1.5 to 3.0% in terms of percent by weight [ and wherein a head portion of said steel rail does not contain a pro-eutectic cementite structure] .
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