抄録
When Producing P/M parts by the MIM, the debinding step takes the longest time of its process. How to reduce the binder removal time is the key to the MIM, though the injection machine forming is highly productive. The rapid binder removal could be achived by the solvent extraction. When using copper powder, the solvent extraction needed 8 houus, though the thermal debinding needed more than 40 hours. The sintered pert at 1020°C had a relative density of 95%. The pore was all closed, which was remarkable of the MIM sintered part. Two types of the binder were discussed here. One consisted of polyolefin and oil, another consisted of polyethylene glycol. Using the polyethylene glycol, the miscibility of the binder had been much improved.
