摘要:
The present invention concerns a method, according to which powder compositions of iron-based particles are admixed with a thermoplastic material and a lubricant. The obtained mixture is compacted at a temperature below the glass-transition temperature or melting point of the thermoplastic resin and the compacted product is heated in order to cure the thermoplastic resin. Subsequently the obtained compacted component is optionally heated to a temperature above the curing temperature.
摘要:
A lubricant for metallurgical powder compositions contains an oligomer of amide type, which has a weight-average molecular weight Mw of 30,000 at the most. A metal-powder composition containing the lubricant, as well as a method for making sintered products by using the lubricant, are also disclosed. Further, the use of the lubricant in warm compaction is described.
摘要:
An iron-based powder for producing impact-resistant components by powder compacting and sintering contains, in addition to Fe, 0.3-0.7 % by weight of P, 0.3-3.5 % by weight of Mo, and not more than 2 % by weight of other alloying elements. A method of powder-metallurgically producing impact-resistant steel components comprises using an iron-based powder which, in addition to Fe, contains 0.3-0.7 % by weight of P, preferably 0.35-0.65 % by weight of P, 0.3-3.5 % by weight of Mo, preferably 0.5-2.5 % by weight of Mo, and not more than 2 % by weight, preferably not more than 1 % by weight, of other alloying elements; compacting the powder into the desired shape; and sintering the compact.
摘要:
L'invention se rapporte à une composition sous forme de poudre à base de fer qui, en plus d'une poudre de fer sensiblement non-alliée, comprend Sn et P, éventuellement un lubrifiant et, au maximum, 1 % en poids d'impuretés. Dans la composition, Sn et P sont présents en tant qu'alliages de SnP sous forme de poudre ou bien Sn est présent sous forme d'une poudre métallique et P est présent sous forme d'une poudre ferrophosphoreuse; la teneur en Sn, sur la base de la totalité de la composition en poudre à base de fer, est d'au moins de 4,5 % en poids et les particules individuelles contenant Sn et P sont présentes en tant que particules sensiblement séparées des particules de la poudre de fer non-alliée. Enfin, Sn et P peuvent également être présents en tant qu'alliage de SnP sous forme de poudre et Sn peut également être présent en tant que poudre métallique. Ladite composition peut éventuellement contenir également P en tant que poudre ferrophosphoreuse.
摘要:
On décrit une poudre à base de fer permettant de produire, par compactage et frittage de poudres, des éléments caractérisés par une excellente résistance et une très faible variation dimensionnelle. La poudre contient, en plus du fer, de 0,5 à 4,5 % en poids de Ni, de 0,65 à 2,25 % en poids de Mo et de 0,35 à 0,65 % en poids de C, ainsi qu'éventuellement un lubrifiant et des impuretés. La variation dimensionnelle maximale est de 0,07 % pour une masse volumique minimale de 6,7 % g/cm3.
摘要:
A heat-insulating component consists of a porous body obtained by moulding and sintering an iron-base powder having an admixture of 2-10% by weight of silicon, preferably 4-8% by weight. A method of making the heat-insulating component includes the steps of preparing an iron-base powder mixture with an admixture of 2-10% by weight of silicon, preferably 4-8% by weight; optionally supplying the powder with further admixtures in the form of 3-12% by weight of manganese, preferably 5-10% by weight, up to 25% by weight of chromium, up to 15% by weight of nickel, up to 2.5% by weight of molybdenum and up to 2% by weight of carbon, moulding the powder mixture into a body of desired shape, and sintering the body for obtaining a porous component having a coefficient of thermal conductivity below about 12 W/m°K, preferably below 7 W/m°k.
摘要翻译:绝热部件由通过模制和烧结具有2-10重量%硅,优选4-8重量%的混合物的铁基粉末而获得的多孔体组成。 制造隔热部件的方法包括以2-10重量%的硅,优选4-8重量%的混合物制备铁基粉末混合物的步骤; 任选地向粉末供应3-12重量%的锰,优选5-10重量%,至多25重量%的铬,至多15重量%的镍,至多2.5重量%的形式的另外的混合物。 的钼和至多2重量%的碳,将粉末混合物成型为所需形状的体,并烧结体以获得导热系数低于约12W / m·K的多孔组分,优选 低于7W / m DEG。
摘要:
The machinability of a sintered body produced by sintering from a pressed iron powder mixture can be increased substantially by utilising an iron powder mixture in which manganese sulphide is included in the form of a very fine powder having a particle size of less than 10 µm. The iron powder mixture is prepared by adding the manganese sulphide in the form of the said fine powder having a particle size of less than 10 µm and in an amount such that the finished mixture will contain 0.05-5% by weight of manganese sulphide, preferably 0.3-1.0% by weight of manganese sulphide.
摘要:
For the purpose of lubricating a cavity, particularly an annular cavity in a tool for forging blanks produced by powder metallurgy, a lubricant spray is directed towards a limited portion of the cavity surface and the nozzle is displaced such that impingement area of the spray against the cavity sweeps over the entire surface of the cavity. The impingement surface of the lubricant spray is adapted to cover the radial extension of the annular cavity, the nozzle being displaced along the periphery of the cavity. An apparatus for carrying out the method includes a carrier (10) with a mounting (11) for a swinging arm (12) carrying a spray nozzle (14). The carrier (10) is adapted for being positioned for mounting of the arm coaxial with the axis of the cavity, the arm (12,13) being arranged for positioning the nozzle (14) over a peripheral portion of the cavity. Means (31) are arranged for causing the nozzle (14) to circulate along the periphery of the cavity.
摘要:
For providing laser cladded surfaces with low cracking risk in the laser cladded surface, whether macro or micro cracking, an iron-chromium based alloy is provided, consisting of by weight of total weight of alloy:
the balance being iron (Fe) and unavoidable impurities not exceeding 0.5 wt%.