公开(公告)号：US5882376A

公开(公告)日：1999-03-16

申请号：US910588

申请日：1997-07-25

Applicant: Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

Inventor： Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

IPC: B22F9/08 ,  B22F9/00 ,  B22F9/22 ,  C22C1/05 ,  B22F9/26

CPC classification number: C22C1/055 ,  B22F2998/00 ,  Y10S977/776

Abstract: A mechanochemical process for producing fine WC/Co composite powder which is so small in WC grain size and in mean free path, and contains such a uniform distribution of WC and Co that its hard metal is superior in strength, compressive strength, TRS and wear resistance and considerably free of impurities. The method comprises the steps of drying an ammonium metatungstate--Co(NO.sub.3).sub.2 solution in a spray dry manner to give initial powder of porous spheroids or in a common manner to give a cake of initial powder, removing the salts and humidity from the initial powder by a thermal treatment, mixing and milling the desalted initial powder with carbon black, and subjecting the mixed powder to reduction/carburization in a reactor.

Abstract translation: WC颗粒尺寸小，平均自由程度小的WC / Co复合粉末的机械化学方法，含有均匀的WC和Co分布，其硬度优良，抗压强度，TRS和磨损性 电阻和相当大的无杂质。 该方法包括以喷雾干燥方式干燥偏钨酸铵-Co（NO 3）2溶液以产生多孔球体的初始粉末或以常规方式得到初始粉末饼，从初始的粉末中除去盐和湿气 通过热处理粉末，用炭黑混合和研磨脱盐的初始粉末，并将混合粉末在反应器中进行还原/渗碳。

公开(公告)号：US5842108A

公开(公告)日：1998-11-24

申请号：US910672

申请日：1997-08-13

Applicant: Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

Inventor： Byoung-Kee Kim ,  Gil-Geun Lee ,  Gook-Hyun Ha ,  Dong-Won Lee

IPC: C04B35/00 ,  B22F3/00 ,  B22F9/00 ,  B22F9/16 ,  B22F9/22 ,  C01G41/00 ,  C22C1/04 ,  B22F3/12

CPC classification number: C01G41/00 ,  B22F3/001 ,  C22C1/045 ,  B22F2998/10

Abstract: A method for producing high density and ultrafine W/Cu bulk material by a mechano-chemical process is disclosed. In the method of this invention, metal salts as start materials are spray-dried and prepare W--Cu precursor powder having uniformly-dispersed tungsten and copper components. The W--Cu precursor powder in turn is subjected to a desalting and milling process, thus preparing W--Cu oxide composite powder. Thereafter, the W--Cu oxide composite powder may be formed into a formed green body prior to reducing and sintering under hydrogen atmosphere.

Abstract translation: 公开了通过机械化学方法生产高密度和超细W / Cu块状材料的方法。 在本发明的方法中，作为起始材料的金属盐被喷雾干燥并制备均匀分散的钨和铜组分的W-Cu前体粉末。 将W-Cu前体粉末依次进行脱盐和研磨处理，从而制备W-Cu氧化物复合粉末。 此后，在氢气氛下还原和烧结之前，可以将W-Cu氧化物复合粉末形成为成形的生坯。