Title:
HEAT-RESISTANT ALLOY FOR HIGH-STRENGTH EXHAUST VALVE EXCELLENT IN OVERAGING RESISTANCE
Document Type and Number:
Japanese Patent JP3951943
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a heat-resistant alloy for exhaust valves which has a Ni content restricted to at most 62% from the viewpoint of material cost, secures strength equal to or higher than that of a conventional alloy, and retains the strength after high-temperature long-term use.
SOLUTION: The heat resistant alloy contains, by wt.%, 0.01-0.2% C, ≤1% Si, ≤1% Mn, ≤0.02% P, ≤0.01% S, 30-62% Ni, 13-20% Cr, 0.01-3.0% W, ≥0.7% and less than 1.6% Al, 1.5-3.0% Ti, 0.5-1.5% Nb, 0.001-0.01% B, and the balance substantially being Fe and inevitable impurities, provided %Ti/%Al is 1.6 or higher but lower than 2.0. The alloy may further contain (I) ≤2.0% Mo (in this case, Mo+0.5W is 1.0-2.5%), (II) at least either 0.001-0.03% Mg or 0.001-0.03% Ca, (III) 0.001-0.1% Zr, (IV) ≤2.0% Cu, and (5) 0.05-1.0% V.
Inventors:
Katsuhiko Tominaga
Nakatani Shoichi
Katsuaki Sato
Shigenori Ueda
Shunji Noda
Nakatani Shoichi
Katsuaki Sato
Shigenori Ueda
Shunji Noda
Application Number:
JP2003073822A
Publication Date:
August 01, 2007
Filing Date:
March 18, 2003
Export Citation:
Assignee:
Honda motor industry stock company
Daido Steel Co., Ltd.
Daido Steel Co., Ltd.
International Classes:
C22C19/03; F01L3/02; C22C19/05; C22C30/02; C22C38/00; C22C38/54; (IPC1-7): C22C19/03; C22C38/00; C22C38/54; F01L3/02
Domestic Patent References:
| JP56020148A | ||||
| JP63213631A | ||||
| JP7109539A | ||||
| JP7216482A | ||||
| JP10130789A | ||||
| JP10130790A | ||||
| JP11199987A |
Attorney, Agent or Firm:
Sooo Suga
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