粉末プロセスの制御と製品評価ＩＩ ＭＩＭプロセスによる部品の多機能・複雑形状化のための接合

Abstract

Metal injection molding(MIM) process is hoped to be an advanced powder processing technique for the attributes of the near net shape forming the high density, high performance, and complicated parts. However, there remains the issue that the shape and volume of MIM compacts are still limited because of the shape deformation during debinding and sintering.In this work, as one of new approaches to improve the above problems in MIM process, joining of MIM parts by using the exuded wax during solvent debinding has been attempted to produce the larger, more complicated andfunctional parts by combination of the different materials such as iron and stainless steel. On the solvent debinding, the deformation was prevented from covering the couple of compacts with Al2O3 powder. As the solvent debinding temperature increased, the binder removal and bonding property were increased. For the combination of the same materials(Fe/Fe, SUS304L/SUS304L, SUS410C/SUS410C) and different materials (SUS304L/SUS410C), the joining properties after sintering depended on the solvent debinding temperature, that is, high joined strength was obtained at high temperature.