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1. 发明公开

EP3797894A1 METHOD FOR MANUFACTURING FORGED ARTICLE 有权转让
公开(公告)号：EP3797894A1
公开(公告)日：2021-03-31
申请号：EP19806652.4
申请日：2019-05-16
申请人： Hitachi Metals, Ltd. , Toyota Jidosha Kabushiki Kaisha , Daido Chemical Co., Ltd. , Umetoku Co., Ltd
发明人： SHOUJI, Tatsuya , KOSEKI, Shuho , INOUE, Kenichi , OBATA, Katsuhiro , MURAKAMI, Satoshi , HAYASHI, Naoki , SUZUKI, Yoshikazu , MIYAMOTO, Toshifumi , OTOMO, Toru , IKEDA, Nobuhiro , UDA, Kousuke , OGISU, Takashi
IPC分类号： B21J13/02
摘要： A method for manufacturing a forged article, capable of improving the durability of a die for forging is provided. The method, includes forging a steel material, by using a die, by spraying or applying a water-soluble polymer lubricant containing 0.01 to 0.98 mass% of a water-soluble sulfate onto a working surface of the die, the die being made of a raw material having a constituent composition of, by mass%, 0.4 to 0.7% of C, 1.0% or less of Si, 1.0% or less of Mn, 4.0 to 6.0% of Cr, 2.0 to 4.0% of (Mo+1/2W), 0.5 to 2.5% of (V+Nb), 0 to 1.0% of Ni, 0 to 5.0% of Co, 0.02% or less of N, and a remnant composed of Fe and impurities, and having hardness of 55 to 60 HRC, and the die including a nitrided layer or a nitrosulfidized layer on the working surface thereof.

2. 发明授权

EP3241629B1 COLD WORK TOOL AND METHOD FOR MANUFACTURING SAME 有权
公开(公告)号：EP3241629B1
公开(公告)日：2018-11-14
申请号：EP16768309.3
申请日：2016-03-01
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , SHINJI, Yukio , KURODA, Katsufumi
IPC分类号： B21D37/20 , B21D37/01 , B21J13/02 , B23B27/14 , C22C38/00 , C21D9/00 , C22C38/36 , C22C38/60 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/40 , C21D1/25 , C21D6/00 , C21D8/02 , C21D1/18 , C22C38/02 , C22C38/04
CPC分类号： C21D9/46 , B21D37/01 , B21D37/20 , B21J13/02 , B23B27/14 , C21D1/18 , C21D1/25 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0236 , C21D8/0247 , C21D9/0068 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/36 , C22C38/40
摘要： Provided are: a cold work tool having excellent wear resistance; and a method for manufacturing the cold work tool. A cold work tool which has an ingredient composition that can be prepared into a martensite structure by quenching and which has a martensite structure, wherein the hardness of the cold work tool is 58 HRC or more, the area ratio of a carbide having an equivalent circle diameter of 5 µm or more in the cross-sectional structure of the cold work tool is 4.0 % by area or more, and the carbon solid solution fraction, which is expressed by the ratio of the mass ratio of the amount of carbon that is present in the form of a solid solution in the structure of the cold work tool to the mass ratio of the amount of carbon that is contained in the whole of the cold work tool, is 75.0% or more. A method for manufacturing a cold work tool, which is suitable for manufacturing the aforementioned cold work tool.

3. 发明授权

EP3305934B1 COLD WORKING TOOL MATERIAL AND COLD WORKING TOOL MANUFACTURING METHOD 有权
公开(公告)号：EP3305934B1
公开(公告)日：2020-02-19
申请号：EP16894605.1
申请日：2016-12-27
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , MISHIMA, Setsuo , SHINJI, Yukio , KURODA,Katsufumi
IPC分类号： C22C38/00 , C21D6/00 , C21D9/00 , C22C38/36 , C22C38/60 , C21D8/00 , C21D1/18 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24

4. 发明授权

EP3199656B1 COLD WORK TOOL MATERIAL AND METHOD FOR MANUFACTURING COLD WORK TOOL 有权
公开(公告)号：EP3199656B1
公开(公告)日：2019-04-10
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 , C22C38/26 , C22C38/34 , C22C38/36 , C22C38/44 , C21D8/02 , C21D1/18 , C22C38/02 , C22C38/04 , C22C38/22

5. 发明公开

EP3241629A1 COLD WORK TOOL AND METHOD FOR MANUFACTURING SAME 有权
标题翻译：冷作工具及制造该工具的方法
公开(公告)号：EP3241629A1
公开(公告)日：2017-11-08
申请号：EP16768309.3
申请日：2016-03-01
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , SHINJI, Yukio , KURODA, Katsufumi
IPC分类号： B21D37/20 , B21D37/01 , B21J13/02 , B23B27/14 , C22C38/00 , C21D9/00 , C22C38/36 , C22C38/60
CPC分类号： C21D9/46 , B21D37/01 , B21D37/20 , B21J13/02 , B23B27/14 , C21D1/18 , C21D1/25 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0236 , C21D8/0247 , C21D9/0068 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/36 , C22C38/40
摘要： Provided are: a cold work tool having excellent wear resistance; and a method for manufacturing the cold work tool. A cold work tool which has an ingredient composition that can be prepared into a martensite structure by quenching and which has a martensite structure, wherein the hardness of the cold work tool is 58 HRC or more, the area ratio of a carbide having an equivalent circle diameter of 5 µm or more in the cross-sectional structure of the cold work tool is 4.0 % by area or more, and the carbon solid solution fraction, which is expressed by the ratio of the mass ratio of the amount of carbon that is present in the form of a solid solution in the structure of the cold work tool to the mass ratio of the amount of carbon that is contained in the whole of the cold work tool, is 75.0% or more. A method for manufacturing a cold work tool, which is suitable for manufacturing the aforementioned cold work tool.
摘要翻译：提供：具有优异耐磨性的冷作工具; 以及用于制造冷作工具的方法。 1。一种冷加工工具，其特征在于，具有能够通过淬火而制成马氏体组织且具有马氏体组织的成分组成，冷加工工具的硬度为58HRC以上，具有当量圆的碳化物的面积率冷加工工具的截面结构中的5μm以上的直径为4.0面积％以上，并且碳固溶体分率由存在的碳量的质量比以冷作工具结构中的固溶体形式与冷作工具整体中所含碳量的质量比率为75.0％以上。一种制造适用于制造上述冷作工具的冷作工具的方法。

6. 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。

7. 发明授权

EP3255165B1 COLD WORK TOOL MATERIAL, COLD WORK TOOL AND METHOD FOR MANUFACTURING SAME 有权
公开(公告)号：EP3255165B1
公开(公告)日：2020-03-11
申请号：EP16746354.6
申请日：2016-01-07
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , SHINJI, Yukio , KURODA, Katsufumi
IPC分类号： C22C38/00 , B21J13/02 , C21D6/00 , C22C38/36 , C21D8/00 , C22C38/02 , C22C38/04 , C21D7/13 , C22C38/22 , C22C38/24 , C21D1/18 , C21D1/22 , B21J1/04 , C22C38/06 , C22C38/20

8. 发明公开

EP3305934A1 COLD WORKING TOOL MATERIAL AND COLD WORKING TOOL MANUFACTURING METHOD 有权
标题翻译：冷作工具材料和冷作工具制造方法
公开(公告)号：EP3305934A1
公开(公告)日：2018-04-11
申请号：EP16894605.1
申请日：2016-12-27
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , MISHIMA, Setsuo , SHINJI, Yukio , KURODA,Katsufumi
IPC分类号： C22C38/00 , C21D6/00 , C21D9/00 , C22C38/36 , C22C38/60
摘要： Provided are a cold working tool material with which high hardness can be obtained in a broad range of tempering temperatures, and a cold working tool manufacturing method using same. The present invention is a cold working tool material comprising a steel component composition that contains, in mass%, C: 0.65-2.40%, Cr: 5.0-15.0%, Mo and W alone or combined (Mo+1/2W): 0.50-4.00%, V: 0.10-1.50%, and N: greater than 0.0300% to 0.0800%, in which martensitic structure can be adjusted by quenching, and in which, in a 90 µm long 90 µm wide region of a cross-sectional structure that does not contain carbides with equivalent circle diameters exceeding 5.0 µm, the number density of carbides A with equivalent circle diameters greater than 0.1 µm to 2.0 µm is at least 9.0 × 105/mm2 and the number density of carbides B with equivalent circle diameters greater than 0.1 µm to 0.4 µm is at least 7.5 × 105/mm2. The present invention is also a cold working tool manufacturing method in which quenching and tempering are performed on said cold working tool material.
摘要翻译：本发明提供一种在宽范围的回火温度下可获得高硬度的冷加工工具材料及使用其的冷加工工具制造方法。本发明是一种冷加工工具用材料，其含有以质量％计含有C：0.65〜2.40％，Cr：5.0〜15.0％，Mo和W单独或组合（Mo + 1 / 2W）：0.50 -4.00％，V：0.10-1.50％，N：大于0.0300％-0.0800％，其中马氏体组织可通过淬火来调节，并且其中在横截面90μm长的90μm宽的区域不包含当量圆直径超过5.0μm的碳化物的结构，当量圆直径大于0.1μm〜2.0μm的碳化物A的个数密度为9.0×10 5个/ mm 2以上，并且当量圆直径的碳化物B的个数密度大于0.1μm至0.4μm至少为7.5×105 / mm2。本发明还是一种冷加工工具制造方法，其中对所述冷加工工具材料进行淬火和回火。

9. 发明公开

EP3255165A1 COLD WORK TOOL MATERIAL, COLD WORK TOOL AND METHOD FOR MANUFACTURING SAME 有权
标题翻译：冷作工具材料，冷作工具和制造该工具的方法
公开(公告)号：EP3255165A1
公开(公告)日：2017-12-13
申请号：EP16746354.6
申请日：2016-01-07
申请人： Hitachi Metals, Ltd.
发明人： SHOUJI, Tatsuya , SHINJI, Yukio , KURODA, Katsufumi
IPC分类号： C22C38/00 , B21J13/02 , C21D6/00 , C22C38/36 , C21D8/00
CPC分类号： C21D7/13 , B21J1/04 , B21J13/02 , C21D1/18 , C21D1/22 , C21D6/002 , C21D8/005 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24
摘要： Provided is a cold work tool material capable of reducing dimensional changes which occur, due to heat treatment, in the longitudinal direction of the material during quenching and tempering. This cold work tool material is drawn through hot working, has an annealed structure including carbides, and is used after being quenched and tempered, wherein, in the annealed structure which is formed in a cross section parallel to a drawing direction due to the hot working of the cold work tool material, the standard deviation in the degree of orientation of carbides Oc, as determined by equation (1) below, is 6.0 or more for carbides having a circle equivalent diameter of 5.0 µm or greater as observed in the annealed structure in the cross section at right angle to a direction perpendicular to the drawing direction. Oc=D×θ...(1), where D represents the circle equivalent diameter (µm) of the carbide, and 0 represents the angle (rad) between the major axis of an approximate ellipse of the carbide and the drawing direction. A cold work tool using the cold work tool material and a method for manufacturing the same are also provided.
摘要翻译：本发明提供一种冷加工用工具材料，其能够减少由于热处理而在淬火和回火过程中沿材料的纵向发生的尺寸变化。该冷作工具材料通过热加工被拉伸，具有包含碳化物的退火组织，并且在经过淬火和回火之后使用，其中，在由于热加工而形成在与拉制方向平行的截面中的退火组织在退火构造中观察到的碳当量直径为5.0μm以上的碳化物的碳化物的取向度的标准偏差如下式（1）所示那样为6.0以上在与垂直于拉伸方向的方向成直角的截面中。 Oc = D×θ...（1）其中，D表示碳化物的当量圆直径（μm），0表示碳化物的近似椭圆的长轴与拉伸方向之间的角度（弧度）。还提供了使用冷作工具材料的冷作工具及其制造方法。

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