MIXED POWDER HIGH-DENSITY MOLDING METHOD, MIXED POWDER HIGH-DENSITY MOLDING SYSTEM, AND HIGH-DENSITY THREE-LAYER GREEN COMPACT

摘要

A first die is sequentially filled with a first-layer mixed powder that is a mixture of a basic metal powder having a small particle size and a low-melting-point lubricant powder, a second-layer mixed powder that is a mixture of the basic metal powder having a large particle size and the low-melting-point lubricant powder, and a third-layer mixed powder that is a mixture of the basic metal powder having a small particle size and the low-melting-point lubricant powder. A first pressure is applied to each mixed powder to form an intermediate green compact. The intermediate green compact is heated, and placed in a second die. A second pressure is applied to the intermediate green compact to form a high-density three-layer green compact.

主权项

1. A mixed powder high-density molding method comprising:
filling a first die sequentially with a first-layer mixed powder that is a mixture of a basic metal powder having a small particle size and a low-melting-point lubricant powder, a second-layer mixed powder that is a mixture of the basic metal powder having a large particle size and the low-melting-point lubricant powder, and a third-layer mixed powder that is a mixture of the basic metal powder having a small particle size and the low-melting-point lubricant powder; applying a first pressure to the third-layer mixed powder, the second-layer mixed powder, and the first-layer mixed powder in the first die to form a mixed powder intermediate compressed body; heating the mixed powder intermediate compressed body removed from the first die to a melting point of the lubricant powder; placing the heated mixed powder intermediate compressed body in a second die; and applying a second pressure to the mixed powder intermediate compressed body in the second die to form a high-density mixed powder final compressed body.