| 摘要 |
A method of producing a sintered metal component from powder comprises mixing a high alloy steel powder with a low alloy steel or an iron powder in the presence of a free carbon powder in the range 0.1 to 1.5 wt %, optionally with a lubricant, pressing the powder mixture to provide a green compact of density greater than 6.8 gm/cc, and sintering the green compact to consolidate it at a temperature below the melting point of any component of the powder so that no liquid other than lubricant is formed during the sintering process. During cooling from the sintering temperature, the cooling in the range between 900 C and 300 C is controlled to between 10 and 400 C per minute, with no following austenising treatment applied. The process produces metal alloy components, for example wear resistant components for use in the automobile industry, which have high density and high dimensional stability. |
