Abstract:
Earth-boring tools for drilling subterranean formations include a particle-matrix composite material comprising a plurality of at least partially carburized monotungsten carbide and ditungsten carbide eutectic particles dispersed throughout a matrix material. In some embodiments, the particles are at least substantially fully carburized monotungsten carbide and ditungsten carbide eutectic particles. In further embodiments, the particles are generally spherical or at least substantially spherical. Methods of forming such particles include exposing a plurality of monotungsten carbide and ditungsten carbide eutectic particles to a gas containing carbon. Methods of manufacturing such tools include providing a plurality of at least partially carburized monotungsten carbide and ditungsten carbide eutectic particles or at least substantially completely carburized monotungsten carbide and ditungsten carbide eutectic particles within a matrix material.
Abstract:
Earth-boring tools for drilling subterranean formations include a particle-matrix composite material comprising a plurality of at least partially carburized monotungsten carbide and ditungsten carbide eutectic particles dispersed throughout a matrix material. In some embodiments, the particles are at least substantially fully carburized monotungsten carbide and ditungsten carbide eutectic particles. In further embodiments, the particles are generally spherical or at least substantially spherical. Methods of forming such particles include exposing a plurality of monotungsten carbide and ditungsten carbide eutectic particles to a gas containing carbon. Methods of manufacturing such tools include providing a plurality of at least partially carburized monotungsten carbide and ditungsten carbide eutectic particles or at least substantially completely carburized monotungsten carbide and ditungsten carbide eutectic particles within a matrix material.
Abstract:
L'invention concerne un alliage Fe-Si-La de composition atomique : (La 1-a-a' Mm a TR a' ) 1 [(Fe 1-b-b ,Co b M b ,) 1-χ (Si 1-c X c ) x ] 13 (C d N e H 1-d-e ) y (R) z (l) f Mm représentant un mélange de lanthane, cérium, néodyme et praséodyme dans la proportion pondérale de 22 à 26% de La, 48 à 53% de Ce, 17 à 20% de Nd et 5 à 7% de Pr, ledit mélange pouvant comprendre jusqu'à 1 % en poids d'impuretés, TR représentant un ou plusieurs éléments de la famille des terres rares autres que le lanthane, M représentant un ou plusieurs éléments de transition de type d des couches 3d, 4d et 5d X représentant un élément métalloïde choisi parmi Ge, Al, B, Ga et In R représentant un ou plusieurs éléments choisis parmi Al, Ca, Mg, K et Na, I représentant un ou deux éléments choisis parmi O et S, avec : 0 ≤ a
Abstract translation:本发明涉及具有以下原子组成的Fe-Si-La合金:(La1-a-a'MmaTRa')1 [(Fe1-bb,CobMb,)1-β(Si1-cXc)x] 13(CdNeH1 -de)y(R)z(1)f,其中Mm是镧,铈,钕和镨的混合物,其重量比例为La的22〜26%,Ce的48〜53%,Ce的17〜20% 的Nd和5〜7%的Pr,其中所述混合物可以包含高达1重量%的杂质,TR是除镧之外的稀土族的一种或多种元素,M是来自层的一种或多种d型过渡元素 3d,4d和5d,X是选自Ge,Al,B,Ga和In的准金属元素,R是选自Al,Ca,Mg,K和Na中的一种或多种元素,I是选自O 和S,其中:0 = a <0.5,0 = a'<0.2; 0 = b = 0.2,0 = b'<0.4; 0 = c = 0.5,0 = d = 1; 0 = e = 1,f = 0.1; 0.09 = x = 0.13和0.002 = y = 4; 0.0001 = z = 0.01; 标记b,d,e,x和y使得合金进一步满足以下条件:6.143b(13(1-x))+ 4.437y [1-0,0614(d + e)] = 1等式 .1 d * y = 0.005 Eq.2。 本发明还涉及这种合金或这些合金的混合物的粉末及其制造方法。
Abstract:
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.
Abstract:
A granular metallic iron which is produced by subjecting a raw material containing a carbonaceous reducing agent and an iron−containing material to reduction and melting, characterized in that it has an iron content of 94 mass % or more, a C content of 1.0 to 4.5 mass %, and a granule diameter of 1 to 30 mm.
Abstract:
The present invention relates to a coated cemented carbide insert with a binder phase enriched surface zone. The WC-grains have an average grain size in the range 1.0-3.5 mu m, preferably 1.3-3.0 mu m and the number of WC-grains larger than 2 times the average grain size is less than 10 grains/cm measured on a representative polished section 0.5 cm large, preferably less than 5 grains/cm , and the number larger than 3 times the average grain size is less than 5 grains/cm , preferably less than 3 grains/cm . The cemented carbide is made by powder metallurgical methods and is in particular characterized in that the cooling rate, CR, from the sintring temperature, ST, exhibits the relationship 10
Abstract translation:本发明涉及具有粘结相富集表面区域的涂覆硬质合金刀片。 WC颗粒的平均晶粒尺寸在1.0-3.5μm,优选1.3-3.0μm的范围内,并且大于平均晶粒尺寸的2倍的WC颗粒数小于10个谷物/ cm 2 在0.5cm 2以上,优选小于5个/ cm 2的代表性抛光部上,平均粒径的3倍以上的数小于5个/ cm 2,优选为3个以下 /厘米<2>。 硬质合金通过粉末冶金方法制成,其特征在于从冷却温度(ST)的冷却速率(CR)表现出10
Abstract:
The present invention relates to a process for manufacturing atomized metal powder in an atomization plant comprising a casting box, a reactor vessel, a powder container and sedimentation equipment. The production process takes place with controlled thermal balance. The invention also relates to an atomization plant, atomized metal powder and the use of the metal powder as coolant in the manufacture of steel.
Abstract:
A cobalt-free steel alloy comprising: (a) from 2 to 3 wt.% carbon, (b) from 4 to 6 wt.% chromium, (c) from 0.1 to 0.5 wt.% manganese, (d) from 0.1 to 0.9 wt.% silicon, (e) from 9 to 11 wt.% molybdenum, (f) from 6 to 8 wt.% vanadium, (g) optionally one or more of the following elements, from 0 to 0.3 wt.% copper, from 0 to 0.2 wt.% nickel, from 0 to 0.1 wt.% aluminium, from 0 to 0.05 wt.% phosphorus, from 0 to 0.05 wt.% sulphur, from 0 to 0.1 wt.% titanium, from 0 to 0.1 wt.% niobium, from 0 to 0.1 wt.% tantalum, from 0 to 0.1 wt.% boron, from 0 to 0.1 wt.% nitrogen, from 0 to 0.1 wt.% oxygen, from 0 to 0.1 wt.% calcium, from 0 to 0.1 wt.% tungsten, (h) the balance iron, together with unavoidable impurities.
Abstract:
The present invention provides a low cost pre-alloyed iron based powder which has high compressibility, capable of rendering a compacted and sintered component high green density, (GD), and high sintered density, (SD). Also, a method or process for producing components, especially gears, including compaction of powder mixture containing the pre-alloyed iron-based powder, sintering of the compacted component, Low Pressure carburizing, (LPC), High Pressure Gas Quenching, (HPGQ), and tempering, is provided. In one embodiment, the process includes high temperature sintering. Other aspects of the present invention include a powder mixture containing the pre-alloyed iron based powder and components produced by the new process from the powder mixture. Such carburized components exhibit a hard surface combined with a softer and tougher core, necessary properties for e.g. automotive gears subjected to harsh environment.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Lagerrings mit integrierten Kühlkanälen und einen Lagerring mit integrierten Kühlkanälen.