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Methods for thermomechanically processing tool steel and tools made from steels for thermomechanically processed tools

机译：热机械加工工具钢的方法和由热机械加工工具的钢制成的工具

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摘要

A method for thermomechanically processing a preform composed of tool steel, which has a martensitic starting temperature and a stable austenitic temperature, the preform having a first region (30, 62) containing austenite, including the first region (30, 62) an outer surface and a plurality of outer dimensions of the outer surface and a second region (32) separated from the outer surface by the first region (30, 62), the method comprising: establishing at least the first region (30, 62) of the tool steel preform at a process temperature between the martensitic start temperature and the stable austenitic temperature such that the microstructure contains austenite; While the first region (30, 62) of the preform is at the process temperature, deform the first region (30, 62) to change at least one of the outer dimensions of the region and to modify the microstructure of the region in a depth that extends from the outer surface to a depth of 1 millimeter or more below the outer surface; and after the first region (30, 62) is deformed, cool the first region (30, 62) to room temperature, avoiding the formation of bainite phase, where the microstructure in the first region (30, 62) includes martensitic grains that have a distribution of disorientation angles, characterized by an average disorientation angle between adjacent grains that is greater than about 34 °.

机译：一种用于热机械加工由工具钢构成的预成型坯的方法，该预成型坯具有马氏体起始温度和稳定的奥氏体温度，该预成型坯具有包含奥氏体的第一区域（30、62），该第一区域包括第一区域（30、62）的外表面以及所述外表面的多个外部尺寸以及通过所述第一区域（30、62）与所述外表面隔开的第二区域（32），所述方法包括：建立所述工具的至少第一区域（30、62）在马氏体起始温度和稳定奥氏体温度之间的工艺温度下使钢预成型坯，从而使显微组织包含奥氏体;当预成型件的第一区域（30、62）处于加工温度时，使第一区域（30、62）变形以改变该区域的外部尺寸中的至少一个并在深度上改变该区域的微观结构。从外表面延伸到外表面下方1毫米或更深的深度;在第一区域（30、62）变形之后，将第一区域（30、62）冷却至室温，避免形成贝氏体相，其中第一区域（30、62）的微观结构包括具有马氏体晶粒的马氏体晶粒。取向角的分布，其特征在于相邻晶粒之间的平均取向角大于约34°。

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公开/公告号ES2554608T3

专利类型
公开/公告日2015-12-22

原文格式PDF
申请/专利权人 DAYTON PROGRESS CORPORATION;
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申请/专利号ES20090002103T
发明设计人 SHEPARD CHRISTON L.;TURPIN DAVID L.;LAPARRE RONALD R.;SHAFFER ALAN L.;CHANDRASEKHARAN SHRINIDHI;
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申请日2009-02-16
分类号B21D37;B21D37/16;B21D37/20;B22F3/24;C21D1/02;C21D6;C21D7/13;C21D8;C21D8/06;C21D9;C21D9/22;
国家 ES
入库时间 2022-08-21 14:22:19

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