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公开(公告)号：EP1546425A2
公开(公告)日：2005-06-29
申请号：EP03798821.9
申请日：2003-09-30
IPC分类号： C22C33/02
CPC分类号： C22C33/0207 , B22F3/1035 , B22F2999/00
摘要： The invention relates to a method for producing a moulded body from sintered steel. According to said method, a sintered powder based on iron is mixed with a master alloy powder containing nickel, boron and iron, and the powder mixture is compressed to form a blank which is then sintered under conditions of a liquid phase sintering with a part by volume in the liquid phase of up to 15 %. In order to improve the impact strength, the boron content of the powder mixture is between 0.03 and 0.2 wt. % when the boron part of the master alloy powder is less than 10 wt. %, the weight ratio between the nickel part and the boron part of the powder mixture exceeds 5, and the master alloy powder has an average particle size of between 10 and 90 µm.
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公开(公告)号：EP2252420B1
公开(公告)日：2011-09-07
申请号：EP09718461.8
申请日：2009-03-05
CPC分类号： B22F3/24 , B22F2998/10 , B22F2999/00 , C22C33/0264 , B22F2003/241 , B22F2201/30 , B22F2201/40 , B22F2207/01 , B22F3/1007 , B22F3/1021 , B22F3/1028
摘要： The invention relates to a method for producing a sintered, iron-based workpiece, wherein a formation is pressed from a sinter powder and sintered into a blank, before the blank is consolidated in the region of a surface layer. In order to enable the surface to be consolidated without a presser tool, it is proposed that the sintered blank be enriched with carbon and/or boron in the surface regions, which are to be consolidated, and resintered above the solidus temperature of the enriched surface layer.
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公开(公告)号：EP1546425B1
公开(公告)日：2011-01-19
申请号：EP03798821.9
申请日：2003-09-30
IPC分类号： C22C33/02
CPC分类号： C22C33/0207 , B22F3/1035 , B22F2999/00
摘要： The invention relates to a method for producing a moulded body from sintered steel. According to said method, a sintered powder based on iron is mixed with a master alloy powder containing nickel, boron and iron, and the powder mixture is compressed to form a blank which is then sintered under conditions of a liquid phase sintering with a part by volume in the liquid phase of up to 15 %. In order to improve the impact strength, the boron content of the powder mixture is between 0.03 and 0.2 wt. % when the boron part of the master alloy powder is less than 10 wt. %, the weight ratio between the nickel part and the boron part of the powder mixture exceeds 5, and the master alloy powder has an average particle size of between 10 and 90 µm.
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公开(公告)号：EP2200769B1
公开(公告)日：2018-10-31
申请号：EP08784502.0
申请日：2008-05-29
发明人： ORTH, Peter , STETINA, Gerold
CPC分类号： B22F3/1007 , B22F2999/00 , C22C33/0264 , B22F2201/01 , B22F2201/30 , B22F2207/01
摘要： The invention describes a method of producing a sinter-hardened component from a metallic powder containing chromium which is pre-alloyed in particular, comprising the steps of compacting the powder to form a green compact and then sintering the green compact in a reducing sintering atmosphere at a sintering temperature in excess of 1100° C. A gas containing carbon is added to the sintering atmosphere.
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公开(公告)号：EP2252420A1
公开(公告)日：2010-11-24
申请号：EP09718461.8
申请日：2009-03-05
CPC分类号： B22F3/24 , B22F2998/10 , B22F2999/00 , C22C33/0264 , B22F2003/241 , B22F2201/30 , B22F2201/40 , B22F2207/01 , B22F3/1007 , B22F3/1021 , B22F3/1028
摘要： The invention relates to a method for producing a sintered, iron-based workpiece, wherein a formation is pressed from a sinter powder and sintered into a blank, before the blank is consolidated in the region of a surface layer. In order to enable the surface to be consolidated without a presser tool, it is proposed that the sintered blank be enriched with carbon and/or boron in the surface regions, which are to be consolidated, and resintered above the solidus temperature of the enriched surface layer.
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公开(公告)号：EP2200769A1
公开(公告)日：2010-06-30
申请号：EP08784502.0
申请日：2008-05-29
发明人： ORTH, Peter , STETINA, Gerold
CPC分类号： B22F3/1007 , B22F2999/00 , C22C33/0264 , B22F2201/01 , B22F2201/30 , B22F2207/01
摘要： The invention describes a method of producing a sinter-hardened component from a metallic powder containing chromium which is pre-alloyed in particular, comprising the steps of compacting the powder to form a green compact and then sintering the green compact in a reducing sintering atmosphere at a sintering temperature in excess of 1100° C. A gas containing carbon is added to the sintering atmosphere.
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公开(公告)号：EP1750892A1
公开(公告)日：2007-02-14
申请号：EP05730303.4
申请日：2005-04-13
发明人： ORTH, Peter , RATZI, Raimund
CPC分类号： B23K26/123 , B22F2999/00 , B23K26/144 , B23K26/32 , B23K35/3053 , B23K2203/02 , B23K2203/50 , B22F7/062 , B22F2202/11
摘要： The invention relates to a method for welding a sintered shaped body (1), which has a residual porosity and which is melted in the area of a subsequent weld seam (3) by a laser beam (4). In order to obtain tight weld seams, the invention provides that, during the melting of the shaped body (1), the atmospheric oxygen from the pores of the shaped body (1) is at least largely bound in the weld seam area by means of a deoxidizing agent, and is embedded in the weld seam (3) in the form of finely dispersed oxides.
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