发明申请
- 专利标题: METHODS OF THERMO-MECHANICALLY PROCESSING TOOL STEEL AND TOOLS MADE FROM THERMO-MECHANICALLY PROCESSED TOOL STEELS
- 专利标题(中): 热机械加工工具钢的机械加工工具钢和工具的方法
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申请号: US12370906申请日: 2009-02-13
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公开(公告)号: US20090229417A1公开(公告)日: 2009-09-17
- 发明人: Christon L. Shepard , Shrinidhi Chandrasekharan , Ronald R. LaParre , David L. Turpin , Alan L. Shaffer
- 申请人: Christon L. Shepard , Shrinidhi Chandrasekharan , Ronald R. LaParre , David L. Turpin , Alan L. Shaffer
- 申请人地址: US OH Dayton
- 专利权人: DAYTON PROGRESS CORPORATION
- 当前专利权人: DAYTON PROGRESS CORPORATION
- 当前专利权人地址: US OH Dayton
- 主分类号: C21D7/13
- IPC分类号: C21D7/13 ; C21D9/22
摘要:
A method of thermo-mechanically processing a preform composed of tool steel and a tool to modify a workpiece. The preform has a region containing austenite. The method comprises establishing the region at a process temperature between a martensitic start temperature and a stable austenitic temperature. While at the process temperature, the region is deformed to change an outer dimension and to modify the microstructure to a depth of 1 millimeter or more. The tool comprises a member composed of tool steel. The member includes a first region that extends from the outer surface to a depth of greater than 1 millimeter and a second region. The first region includes a plurality of grains having an average misorientation angle greater than about 34°, an average grain size that is at least 10% smaller than the second region, and has a different grain orientation than the second region.
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