公开(公告)号：EP0763605A3

公开(公告)日：1997-08-06

申请号：EP96305884.7

申请日：1996-08-12

申请人： NANODYNE INCORPORATED ,  RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY

发明人： McCandish, Larry E. ,  Sadangi, Rajendra K.

IPC分类号： C22C29/06 ,  C22C29/08

CPC分类号： C22C29/08 ,  B22F9/026 ,  B22F2003/1032 ,  C22C1/051 ,  C22C29/067

摘要： A low melting point alloy is used to sinter metal carbide particles. The alloy is a eutectic-like alloy formed from a binding metal such as iron, cobalt or nickel, in combination with vanadium and chromium. The alloy is preferably formed by forming two separate alloys and blending these together. The first alloy is formed by spray drying together a solution of a binding metal salt such as a cobalt salt with a solution of a chromium salt. The formed particles are then carburized to form a cobalt-chromium-carbon alloy. A separate vanadium alloy is formed in the same manner. The two are combined to establish the amount of chromium and vanadium desired, and this, in turn, is used to sinter metal carbide parts. This permits sintering of the metal carbide parts at temperatures less than 1250° C and in turn significantly inhibits grain grown without a significant decrease in toughness. It is particularly adapted to form carbide products wherein the carbide grain size is as low as 120 nanometers.

摘要翻译： 使用低熔点合金来烧结金属碳化物颗粒。 该合金是由结合金属例如铁，钴或镍与钒和铬结合形成的共晶状合金。 该合金优选通过形成两种单独的合金并将它们混合在一起而形成。 第一合金通过将结合金属盐例如钴盐的溶液与铬盐溶液一起喷雾干燥而形成。 然后将形成的颗粒渗碳形成钴 - 铬 - 碳合金。 单独的钒合金以相同的方式形成。 将两者结合起来以确定所需的铬和钒的量，并且这又用于烧结金属碳化物部件。 这允许在低于1250℃的温度下金属碳化物部分的烧结，并且继而显着抑制晶粒生长而没有显着降低韧性。 它特别适用于形成碳化物产品，其中碳化物晶粒尺寸低至120纳米。

公开(公告)号：EP0763605A2

公开(公告)日：1997-03-19

申请号：EP96305884.7

申请日：1996-08-12

申请人： NANODYNE INCORPORATED ,  RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY

发明人： McCandish, Larry E. ,  Sadangi, Rajendra K.

IPC分类号： C22C29/06 ,  C22C29/08

CPC分类号： C22C29/08 ,  B22F9/026 ,  B22F2003/1032 ,  C22C1/051 ,  C22C29/067

摘要： A low melting point alloy is used to sinter metal carbide particles. The alloy is a eutectic-like alloy formed from a binding metal such as iron, cobalt or nickel, in combination with vanadium and chromium. The alloy is preferably formed by forming two separate alloys and blending these together. The first alloy is formed by spray drying together a solution of a binding metal salt such as a cobalt salt with a solution of a chromium salt. The formed particles are then carburized to form a cobalt-chromium-carbon alloy. A separate vanadium alloy is formed in the same manner. The two are combined to establish the amount of chromium and vanadium desired, and this, in turn, is used to sinter metal carbide parts. This permits sintering of the metal carbide parts at temperatures less than 1250° C and in turn significantly inhibits grain grown without a significant decrease in toughness. It is particularly adapted to form carbide products wherein the carbide grain size is as low as 120 nanometers.

摘要翻译： 使用低熔点合金烧结金属碳化物颗粒。 该合金是由诸如铁，钴或镍的结合金属与钒和铬组合形成的共晶合金。 合金优选通过形成两个单独的合金并将它们混合在一起而形成。 通过将结合金属盐如钴盐的溶液与铬盐溶液一起喷雾干燥而形成第一合金。 然后将形成的颗粒渗碳以形成钴 - 铬 - 碳合金。 以相同的方式形成单独的钒合金。 两者结合以确定所需的铬和钒的量，并且这又用于烧结金属碳化物部件。 这允许金属碳化物部件在小于1250℃的温度下烧结，反过来又显着抑制晶粒生长而不显着降低韧性。 它特别适用于碳化物产品，其中碳化物晶粒尺寸低至120纳米。

公开(公告)号：EP0760351A1

公开(公告)日：1997-03-05

申请号：EP96306242.7

申请日：1996-08-28

申请人： NANODYNE INCORPORATED

发明人： McCandlish, Larry E. ,  Sadangi, Rajendra K.

IPC分类号： C01B31/30

CPC分类号： B82Y30/00 ,  C01B32/90 ,  C01B32/914 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64

摘要： Submicron carbide particles are formed from metal containing precursor compositions where the metal is tantalum, niobium, vanadium or chromium by subjecting the precursor composition to a carbonization reaction. The carbonizing gas contains only hydrogen, nitrogen and carbon and the carbonizing reaction is conducted at a temperature of less than 1100° C. By maintaining the carbon deposition potential of the reaction at from 10% to 60%, the precursor composition can be reduced and carburized simultaneously to form the carbide. The formed product has a physical grain size less than 1 micron which significantly improves its ability to be milled with other compositions, as well as its use in cutting tools and the like.

摘要翻译： 亚金属碳化物颗粒由含金属的前体组合物形成，其中金属是钽，铌，钒或铬，通过使前体组合物进行碳化反应。 碳化气体仅含有氢，氮和碳，并且碳化反应在低于1100℃的温度下进行。通过将反应的碳沉积电位维持在10％至60％，可以减少前体组合物， 渗碳同时形成碳化物。 形成的产品具有小于1微米的物理颗粒尺寸，这显着提高了与其他组合物一起研磨的能力，以及其在切割工具等中的用途。