| 摘要 |
The present invention relates to improved metallurgical powder compositions that incorporate solid lubricants, methods for preparing and using the same, and methods of making compacted parts. Ejection properties, such as strippin g pressure and sliding pressure, of compacted parts can be improved by using t he solid lubricants. The solid lubricants contain polyalkylene- polyalkylene oxide block copolymer lubricants or a combination of polyalkylene-polyalkyle ne oxide block copolymer lubricants and at least one additional lubricant. The polyalkylene-polyalkylene oxide block copolymer lubricants include at least one block A of a linear or branched polyalkylene chain having from about 5 t o about 500 carbon atoms, and at least one block B of an alkylene oxide chain having a formula -[O (CH2) r]m- , or -[(CH2)rO]m - . The polyalkylene block copolymer lubricants can have a formula represented as A-B or A-B-A.
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