摘要:
Die Erfindung betrifft ferritisches Gusseisen mit Kugelgraphit, enthaltend in Masse %: 3,4 % bis 3,8 % Kohlenstoff (C), 1,5 % bis 2,1 % Silizium (Si), maximal 0,25 % Mangan (Mn), maximal 0,05 % Schwefel (S), bis zu 0,6 % übliche Begleitelemente, Rest Eisen (Fe). Um bei einem solchen ferritischen Gusseisen mit Kugelgraphit eine Kerbschlagarbeit von mindestens 20J bei einer Temperatur von -10° C zu erreichen, schlägt die Erfindung vor, dass die Begleitelemente Chrom (Cr), Vanadium (V), Niob (Nb) und Titan (Ti) in Summe auf 0,05 Masse % begrenzt sind. Hierdurch ergibt sich in diesem Gusseisen eine Grafitkugelzahl, die die kleiner oder gleich 160/mm² ist. Weiterhin betrifft die Erfindung die Verwendung eines solchen Gusseisens für kälteempfindliche Bauteile, insbesondere an Schiffen oder Windkraftanlagen.
摘要:
An iron-graphite composite powder having a microstructure comprising carbon clusters in a ferrous matrix is disclosed. Also disclosed is a process for preparing the iron-graphite composite powder, a process for preparing sintered articles from this composite powder and the sintered articles prepared thereby.
摘要:
La presente invención describe un procedimiento de inoculación de un aditivo nucleante a una aleación de hierro fundido en un distribuidor de colada mediante el empleo de una antorcha de plasma de arco transferido, con un ánodo parcialmente sumergido en la aleación de hierro fundido y un cátodo situado sobre la superficie de dicha aleación, comprendiendo el ánodo, o el cátodo, o ambos grafito, preferiblemente grafito cristalino sintético que aporta a la aleación de hierro dicho aditivo nucleante. La invención describe asimismo un dispositivo de inoculación útil para llevar a cabo el procedimiento de inoculación.
摘要:
A steel material containing fine graphite particles uniformly dispersed therein and having excellent cold workability, machinability and hardenability and obtained by especially dispersing five graphite particles uniformly therein. The steel contains basic components comprising 0.30-1.0 % of C, 0.4-1.3 % of Si, 0.3-1.0 % of Mn, 0.003-0.006 % of B, 0.002-0.010 % of N and 0.05-0.20 % of Mo, and the graphite has an average grain size of not more than 4.0 mu m, and the number of grains of not less than 3000/mm , and the manufacturing method comprises cooling the steel with a cooling starting temperature of not lower than the Ar1 point and a cooling finishing temperature of not higher than the Ms point and at an average cooling rate of 5-100 DEG C/s.
摘要翻译:一种含有均匀分散在其中的精细石墨颗粒并且具有优异的冷加工性,机加工性和淬透性的钢材,并且通过将五个石墨颗粒均匀地分散在其中而获得。 该钢含有C:0.30-1.0%,Si:0.4-1.3%,Mn:0.3-1.0%,B:0.003-0.006%,N:0.002-0.010%,Mo:0.05-0.20% 石墨的平均粒径不大于4.0μm,晶粒数不小于3000 / mm 2,制造方法包括以不低于Ar1点的冷却起始温度冷却钢 冷却终止温度不高于Ms点,平均冷却速度为5-100℃/ s。
摘要:
Cast irons contain (1) carbon and silicon at a carbon equivalent of 4.35 to 4.95; (2) transition metals of Groups 5 and 6 in the Periodic Table (Cr, Nb, Mo, Ta, W, and V) of which the total contents are no greater than about 3%; and (3) minor elements such as up to about 0.050% phosphorus (P), and up to about 0.080% total residual of magnesium (Mg) and REM (rare earth metals), and (4) the balance iron (Fe) with inevitable impurities. The graphite nodularity in the microstructures is mixed graphite, preferably from 40 to 80% graphite nodularity, or spheroidal graphite mainly dependent upon the casting geometry and service conditions. The cast irons exhibit higher thermal stability, oxidation resistance, middle temperature ductility, and thermal fatigue resistance than conventional SG or CG high-Si iron or SiMo iron.