Metal powder composition for warm compaction and method for producing sintered products
AssigneeHöganäs AB
InventorsHelge Storstrom, Bjorn Johansson
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Abstract
A lubricant for metallurgical powder compositions contains an oligomer of amide type, which has a weight-average molecular weight M.sub.w of 30,000 at the most. A metal-powder composition containing the lubricant, as well as a method for making sintered products by using the lubricant, are also disclosed. Further, the use of the lubricant in warm compaction is described.
Claims21
A metal powder composition for warm compaction comprising an iron-based powder and a lubricant powder consisting essentially of an amide oligomer having a weight-average molecular weight M.sub.W between 1,000 and 30,000 and a melting point peak in the range of 120.degree. to 200.degree. C.
A method for producing sintered products comprising:
- (a) mixing an iron-based powder with a lubricant powder consisting essentially of an amide oligomer which has a weight-average molecular weight M.sub.W between 1,000 and 30,000, and a melting point peak in the range of 120.degree. to 200.degree. C.,
- (b) preheating the metal-powder composition,
- (c) compacting the metal-powder composition in a pre-heated tool, and
- (d) sintering the compacted metal-powder composition at a temperature above 1050.degree. C. to form a sintered product.
Dependencies are inferred from the claim text.