公开(公告)号：JPH08209204A

公开(公告)日：1996-08-13

申请号：JP26044795

申请日：1995-10-06

Applicant: BASF AG

Inventor： HANSU BUOORUFURONMU ,  DEIITAA BUAINANTO ,  MARUTEIN BUREEMATSUHAA ,  MANFUREETO SHIYUBUARUTSU ,  EEFUAAMARIA RANGAA

IPC: B22F3/00 ,  B22C1/00 ,  B22C3/02 ,  B22F1/00 ,  B22F3/02 ,  B22F3/12 ,  C22C33/02

Abstract: PROBLEM TO BE SOLVED: To produce high alloy steel parts containing an oxidation-sensitive metal by preparing a mixture consisting of a carbonyl iron powder, a powder of a specific alloy containing oxidation-sensitive metal, and a binder, subjecting the resultant mixture to injection molding, removing the binder, and carrying out sintering. SOLUTION: A mixed injection molding material, which consists of at least 30 wt.% of a powder of iron group type carbonyl metal, particularly carbonyl iron, at least 5 wt.% of a powder of an alloy of metals selected from the group consisting of Cr, Mn, V, Si, and Ti and containing an oxidation-sensitive metal, and a binder, is prepared. At this time, the proportion between the particle size of the carbonyl metal powder and that of the alloy powder is on the order of 1:2. This injection molding material is injection molded by using a screw type injection molding machine. The contained binder is removed by heating up to, e.g. about 110 deg.C in a nitrogen air stream. Then, high temperature sintering is carried out under reduced pressure or in a reducing protective gas atmosphere or in an inert gas atmosphere of nitrogen, or the like.