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2. 发明公开

EP3199656A1 COLD TOOL MATERIAL AND METHOD FOR MANUFACTURING COLD TOOL 有权
标题翻译：冷工具材料和制造冷工具的方法
公开(公告)号：EP3199656A1
公开(公告)日：2017-08-02
申请号：EP15832776.7
申请日：2015-09-02
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , MISHIMA, Setsuo , TANIGUCHI, Toru , KURODA, Katsufumi
IPC分类号： C22C38/00 , C21D9/00 , C22C37/06 , C22C38/24 , C22C38/60
CPC分类号： C21D1/18 , C21D8/0221 , C21D9/0068 , C21D2211/004 , C22C37/06 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/34 , C22C38/36 , C22C38/44
摘要： The invention provides a cold work tool material which can obtain a high hardness over a wide range of tempering temperatures, and a method of manufacturing a cold work tool with the cold work tool material.
The cold work tool material has an annealed structure including carbides, and has a composition including, in mass%, C: 0.80% to 2.40%, Cr: 5.0% to 15.0%, Mo and W contained alone or in combination in an amount of (Mo + 1/2W): 0.50% to 3.00%, and V: 0.10 to 1.50%, and adjusted such that the material has a martensitic structure by quenching. The cold work tool material includes a cross sectional region of an annealed structure, the region having a length of 90 µm and a width of 90 µm and including no carbides having a circle equivalent diameter exceeding 5.0 µm. In the cross sectional region, a proportion of a number of carbides B having a circle equivalent diameter of more than 0.1 µm and not more than 0.4 µm to a number of carbides A having a circle equivalent diameter of exceeds 0.1 µm and not more than 2.0 µm is greater than 80.0%. The method of manufacturing a cold work tool includes a step of quenching and tempering the above cold work tool material.
摘要翻译：本发明提供一种能够在宽范围的回火温度下获得高硬度的冷作工具材料以及使用该冷作工具材料制造冷作工具的方法。冷加工工具材料具有包含碳化物的退火组织，其组成以质量％计含有C：0.80〜2.40％，Cr：5.0〜15.0％，Mo和W单独或组合含有（Mo + 1 / 2W）：0.50〜3.00％，V：0.10〜1.50％，并通过淬火使其具有马氏体组织。冷作工具材料包括退火结构的横截面区域，该区域具有90μm的长度和90μm的宽度，并且不包括具有超过5.0μm的当量圆直径的碳化物。在该截面区域中，当量圆直径超过0.1μm且0.4μm以下的碳化物B与当量圆直径超过0.1μm且2.0以下的碳化物A的比例 μm大于80.0％。制造冷作工具的方法包括对上述冷作工具材料进行淬火和回火的步骤。

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