Powder composition

a technology of composition and powder metal, which is applied in the direction of lubricant composition, transportation and packaging, metal-working apparatus, etc., can solve the problems of rust formation in the die cavity, aqueous dispersions are a source of rust formation, and the thickness of the film within the die cavity has a tendency to vary, so as to achieve high and consistent densities

a technology of composition and powder metal, which is applied in the direction of lubricant composition, transportation and packaging, metal-working apparatus, etc., can solve the problems of rust formation in the die cavity, aqueous dispersions are a source of rust formation, and the thickness of the film within the die cavity has a tendency to vary, so as to achieve high and consistent densities

US20030230166A1Inactive Publication Date: 2003-12-18HOGANAS AB
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  • Powder composition
  • Powder composition
  • Powder composition

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Embodiment Construction

[0027] The following example, which is not intended to be limiting, present certain embodiments and advantages of the present invention. Unless otherwise indicated any percentages are on a weight basis.

[0028] The mixtures listed in table 1 below were prepared:

1TABLE 1 Sample GMS* EBS** 1 0 100 2 25 75 3 50 50 *Glyceryl monostearate **Etylene bisstearamide

[0029] The iron-based powder in all samples was ASC100.29 which is a water atomised, high purity iron powder available from Hogans AB, Sweden. The total amount of lubricant was 0.8% which was admixed in the powder composition together with 0.5% graphite(C-uf4) . The dry ingredients in the different test mixtures i.e. the iron powder, the lubricant and the graphite were blended to homogenous mixtures and added to a die cavity before compaction. The compaction operation was performed with the different powder mixtures at 400, 600 and 800 MPa at ambient temperature.

[0030] The different test mixtures were tested as regards green density...

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Abstract

The present invention concerns a metal powder composition for the powder metal industry, wherein the metal powder is selected from the group consisting of an atomised iron-based powder or a sponge iron powder, and a lubricant composition comprising glyceryl stearate.

Description

[0001] The present invention relates to a metal powder composition for the powder metal industry. Particularly the invention relates to an iron-based metal powder composition comprising glyceryl stearate as lubricant.[0002] In industry the use of metal products manufactured by compacting and sintering iron-based powder compositions is becoming increasingly widespread. A number of different products of varying shapes and thickness are being produced. One processing technique for manufacture the products from the base powders is to charge the powder into a die cavity and compact the powder under high pressures. The obtained compact is then removed from the die cavity and sintered.[0003] The quality requirements of the products are continuously raised, and in this context one important factor is that the manufactured products have high and consistent density. Much effort is put into research to develop such products and one field within this research concerns lubrication, which is used...

Claims

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Application Information

Patent Timeline
18 Dec 2003
Publication
US20030230166A1
IPC
B22F1/10; B22F3/02; C10M169/04
CPC
B22F1/0059; B22F2998/00; C10N2210/02; C10N2210/01; C10M2215/0806; C10M169/04; C10M2207/1253; C10M2207/126
Inventors
RAMSTEDT, MARIA; KNUTSSON, PER