Abstract:
Die Erfindung betrifft ein Stahlprodukt zum Schutz elektrischer Bauteile vor mechanischer Beschädigung und dadurch bedingtem elektrischem Kurzschluss, hergestellt aus einem Leichtbaustahl mit 6 bis 30 Gew.% Mangan, bis zu 12,0 Gew. % Aluminium, bis zu 6,0 Gew.% Silizium, 0,04 bis 2,0 Gew.% Kohlenstoff sowie zusätzlich einem oder mehreren der Elemente von Chrom, Titan, Vanadium, Niob, Bo, Zirkon, Molybdän, Nickel, Kupfer, Wolfram, Kobalt mit je bis zu 5,0 Gew.% und in Summe bis zu 10,0 Gew.%, Rest Eisen, einschließlich üblicher Stahlbegleitelemente als Warmband oder kaltgewalztes Band, Blech oder Rohr, wobei das Stahlprodukt zumindest einseitig auf der später den elektischen Bauteilen zugewandten Seite mit einer elektrisch nicht leitenden Beschichtung versehen ist.
Abstract:
Embodiments of alloys having high, fine-grained carbide content, and methods of manufacturing such alloys. The alloys can be determined through the use of thermodynamic, micro structural, and compositional criterial in order to create a high strength and high toughness alloy. In some embodiments, the alloys can be used as a wear resistant component.
Abstract:
Es sind legierte Stähle bekannt, die außer Eisen Stickstoff, Kohlenstoff, Wolfram, Kobalt, Vanadium, Niob, Molybdän, Chrom und Mangan enthalten. Diese sind jedoch häufig nicht geeignet als Rollen, Lager oder Buchsen in Verzinkungsanlagen eingesetzt zu werden, da keine ausreichende Korrosions- und Verschleißbeständigkeit gegeben ist. Es wird daher ein Stahl vorgeschlagen, der 0,5 bis 2 Gew.% Stickstoff, 0,5 bis 1,5 Gew.% Kohlenstoff, 5 bis 15 Gew.% Wolfram, 2 bis 7 Gew.% Kobalt, 2 bis 7 Gew.% Vanadium, 2 bis 7 Gew.% Niob, 2 bis 10 Gew.% Molybdän, 3 bis 13 Gew.% Chrom, 5 bis 15 Gew.% Mangan sowie Rest Eisen enthält. Dieser Stahl ist kostengünstig herstellbar und eignet sich hervorragend für eine Anwendung in Verzinkungsanlagen.
Abstract:
Design and fabrication processes and compositions for iron-based bulk metallic glass materials or amorphous steels. Examples of bulk metallic glasses based on the described compositions may contain approximately 59 to 70 atomic percent of iron, which is alloyed with approximately 10 to 20 atomic percent of metalloid elements and approximately 10 to 25 atomic percent of refractory metals. The amorphous steels may exhibit X-ray diffraction patterns as shown in Figure 1. The compositions can be designed using theoretical calculations of the liquidus temperature to have substantial amounts of refractory metals, while still maintaining a depressed liquidus temperature. The alloying elements are molybdenum, tungsten, chromium, boron, and carbon . Some of the alloys are ferromagnetic at room temperature, while others are non-ferromagnetic. These amorphous steels have increased specific strengths and corrosion resistance compared to conventional high strength steels.
Abstract:
A steel article consists of an alloy which contain in weight-%: 1.7 - 2.5 C; 0.1 - 2.0 Si; 0.1 - 2.0 Mn; max 0.2 N; max 0.2 S; 12 16 Cr; 2.1 - 3.5 (Mo + W/2); 5 - 8 V; max 0.1 Nb, balance essentially only iron and unavoidable impurities. The steel has a micro-structure obtainable by a manufacturing of the steel which comprises spray forming of an ingot, the micro-structure of which contains 14 -25 vol-% carbides of mainly MC-type, where M substantially consists of vanadium, of which carbides at least 80 vol-% have a substantially rounded shape and a size in the longest extension of the carbides amounting to 1 - 10 mu m, and M7C3-carbides, where M substantially consists of chromium, which carbides typically have a more elongated shape than the MC-carbides, of which MC-carbides at least 80 vol-% have a maximal extension amounting to 3-50 mu m.
Abstract:
A steel article consists of an alloy which contain in weight-%: 1.7 - 2.5 C; 0.1 - 2.0 Si; 0.1 - 2.0 Mn; max 0.2 N; max 0.2 S; 12 16 Cr; 2.1 - 3.5 (Mo + W/2); 5 - 8 V; max 0.1 Nb, balance essentially only iron and unavoidable impurities. The steel has a micro-structure obtainable by a manufacturing of the steel which comprises spray forming of an ingot, the micro-structure of which contains 14 -25 vol-% carbides of mainly MC-type, where M substantially consists of vanadium, of which carbides at least 80 vol-% have a substantially rounded shape and a size in the longest extension of the carbides amounting to 1 - 10 μm, and M 7 C 3 -carbides, where M substantially consists of chromium, which carbides typically have a more elongated shape than the MC-carbides, of which MC-carbides at least 80 vol-% have a maximal extension amounting to 3-50 μm.
Abstract:
The invention concerns a powder metallurgy produced sinter shaped part exhibiting high thermal and wear resistance. Said part can be obtained from a powder mixture containing molybdenum-phosphorus-carbon-steel powder, at least one additional, substantially phosphorous-free steel powder in a weight ratio ranging from 5:95 to 60:40, carbon powder and at least one solid lubricant. The shaped part can be used especially for tribological parts in the automobile industry.
Abstract:
The invention concerns a nitrogen alloyed steel with higher wear resistance, which is produced by means of spray compacting and has the following composition (in mass/percentage): C: 0.8 2.5 %; N: 0.03 0.75 %; Si: 0.15 1.8 %; Mn: