Claims
- 1. A heat-resisting valve made of a steel consisting essentially by weight percentage of 0.3%.ltoreq.C.ltoreq.0.5%, 1.0%<Si.ltoreq.2.5%, 0.1%.ltoreq.Mn.ltoreq.2.0%, 0.5%.ltoreq.Cr.ltoreq.3.0%, 0.3%.ltoreq.Mo.ltoreq.2.0%, 0.1%.ltoreq.V.ltoreq.1.0%, at least one element selected from the group consisting of 0.3%.ltoreq.Cu.ltoreq.2.0% and 0.001%.ltoreq.REM.ltoreq.0.05%, and the balance of Fe and containing inevitable impurities, with REM being rare earth metal.
- 2. A heat-resisting valve according to claim 1, wherein said steel further contains at least one element selected from the group consisting of 0.1%.ltoreq.Ni<2.0%, 0.1%.ltoreq.W.ltoreq.1.5%, 0.03%.ltoreq.Nb+Ta.ltoreq.1.0%.
- 3. A heat resisting valve according to claim 1, wherein the Si is present in an amount of at least 1.2%.
- 4. A heat resisting valve according to claim 1, wherein the Si is present in an amount of at least 1.5%.
- 5. A heat resisting valve according to claim 1, wherein the Si is present in an amount of at least 1.7%.
- 6. A heat resisting valve according to claim 2, wherein the Ni is present in an amount not greater than 1.98%.
- 7. A heat resisting valve according to claim 2, wherein the Ni is present in an amount of 0.1% to 0.43%.
- 8. A heat resisting valve according to claim 2, wherein the Ni is present in an amount of 0.43%.
- 9. A heat resisting valve according to claim 8, wherein the Si is present in an amount of at least 1.7%.
- 10. A heat resisting valve according to claim 8, wherein the Si is present in an amount of 1.74%.
- 11. A heat resisting valve according to claim 2, wherein the Ni is present in an amount not greater than 0.43%.
- 12. A heat resisting valve according to claim 11, wherein the Si is present in an amount of at least 1.7%.
- 13. A heat resisting valve according to claim 1, wherein Cr is present in an amount of no more than 1.9%.
- 14. A heat resisting valve according to claim 1, wherein Cr is present in an amount of no more than 1.5%.
- 15. A heat resisting valve according to claim 1, wherein Cr is present in an amount of no more than 1.1%.
Priority Claims (1)
Number |
Date |
Country |
Kind |
58-73769 |
Apr 1983 |
JPX |
|
Parent Case Info
This is a continuation-in-part of application Ser. No. 06/608,317, filed Apr. 25th, 1984, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3713905 |
Philip et al. |
Jan 1973 |
|
3926622 |
Kiyonaga et al. |
Dec 1975 |
|
Foreign Referenced Citations (7)
Number |
Date |
Country |
48-3727 |
Feb 1973 |
JPX |
58-171556 |
Oct 1983 |
JPX |
0494841 |
Nov 1938 |
GBX |
0495387 |
Apr 1976 |
SUX |
0703224 |
Dec 1979 |
SUX |
0707988 |
Jan 1980 |
SUX |
0840187 |
Jun 1981 |
SUX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
608317 |
Apr 1984 |
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