Claims
- 1. A process for forming materials comprising the steps of: providing a tool from the group comprising dies and punches including a core and a work surface made from a steel alloy comprised of about 0.008 to 0.24% by weight carbon, about 15 to 28% by weight cobalt, about 1.5 to 9.5% by weight nickel, and one or more additives taken from the group comprising chromium, molybdenum and vanadium, and the balance iron;
case hardening the work surface of the tool to a depth of at least 0.1 millimeters at a hardness of at least 65 Rockwell C; and working the material with the tool by engaging the material with the work surface.
- 2. The process of claim 1, wherein the depth is about 1 to 3 millimeters.
- 3. A process for forming materials comprising the steps of: providing a tool from the group comprising dies and punches including a core and a work surface made from a steel alloy comprised of about 0.008 to 0.24% by weight carbon, about 15 to 28% by weight cobalt, about 1.5 to 9.5% by weight nickel, and one or more additives taken from the group comprising chromium, molybdenum and vanadium, and the balance iron;
case hardening the work surface of the tool to a depth of at least 0.1 millimeters at a hardness in the range of about 58 to 62 Rockwell C; and working the material with the tool by engaging the material with the work surface.
- 4. The process of claim 3, wherein the depth is about 1 to 3 millimeters.
Parent Case Info
[0001] This patent application is a divisional of U.S. patent application No. 09/722,769, filed Nov. 27, 2000, for which priority is claimed. U.S. patent application No. 09//722,769 is a continuation in part of application No. 09/664,021 filed Sep. 19, 2000 entitled “Case Hardened Dies For Improved Die Life” which is a continuation in part of application No. 09/239,131 filed Jan. 28, 1999 entitled “Advanced Case Carburizing Secondary Hardening Steels” which is a continuation of Provisional Application No. 60/072,834 filed Jan. 28, 1998 entitled “Advanced Case Carburizing Secondary Hardening Steels”, and for which priority is claimed with respect to said applications.
ACKNOWLEDGMENT OF FUNDING
[0002] The original subject matter of the parent application was funded, at least in part, by the Army Research Office, Grant No. DAAH04-96-1-0266. The subsequent continuation-in-part subject matter herein was not funded by Grant No. DAAH04-96 -1-0266
Provisional Applications (1)
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Number |
Date |
Country |
|
60072834 |
Jan 1998 |
US |
Divisions (1)
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Number |
Date |
Country |
Parent |
09722769 |
Nov 2000 |
US |
Child |
10105975 |
Mar 2002 |
US |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
09664021 |
Sep 2000 |
US |
Child |
09722769 |
Nov 2000 |
US |
Parent |
09239131 |
Jan 1999 |
US |
Child |
09664021 |
Sep 2000 |
US |