Lubricant for powder metallurgy and metal powder compositions containing said lubricant

Patent metadata

Field	Value
Publication number	US-2018298305-A1
Application number	US-201816014192-A
Country	US
Kind code	A1
Filing date	Jun 21, 2018
Priority date	Sep 12, 2013
Publication date	Oct 18, 2018
Grant date	—

Abstract

A particulate composite lubricant for powder metallurgy is provided. It includes: first discrete particles comprising Montan acid ester wax and at least one fatty amide wax including at least one of: a fatty primary monoamide wax and a fatty bisamide wax. In another embodiment, the particulate composite lubricant for powder metallurgy includes first discrete particles comprising Montan acid ester wax and second discrete particles comprising an organic, metal-free pulverulent lubricant selected from the group consisting of fatty bisamide waxes, fatty monoamide waxes, glycerides, Montan acid ester waxes, paraffin wax, polyolefines, polyamides, polyesters, and mixtures thereof, wherein the particulate composite lubricant comprises at least one fatty amide wax including at least one of a fatty monoamide wax and a fatty bisamide wax.

First claim

1 . A particulate composite lubricant for powder metallurgy comprising: first discrete particles comprising Montan acid ester wax and at least one fatty amide wax including at least one of: a fatty primary monoamide wax and a fatty bisamide wax.

2 . The particulate composite lubricant as claimed in claim 1 , further comprising second discrete particles comprising an organic, metal-free pulverulent lubricant selected from the group consisting of fatty bisamide waxes, fatty monoamide waxes, glycerides, Montan acid ester waxes, paraffin wax, polyolefines, polyamides, polyesters, and mixtures thereof.

3 . The particulate composite lubricant as claimed in claim 1 , wherein the first discrete particles are at least partially coated with metal oxide nanoparticles.

4 . The particulate composite lubricant as claimed in claim 1 , wherein the fatty bisamide wax comprises ethylene bisstearamide.

5 . The particulate composite lubricant as claimed in claim 4 , further comprising second discrete particles comprising erucamide.

6 . The particulate composite lubricant as claimed in claim 5 , wherein the second discrete particles are at least partially coated with metal oxide nanoparticles.

7 . The particulate composite lubricant as claimed in claim 5 , wherein the second discrete particles further comprises at least a portion of the Montan acid ester wax.

8 . The particulate composite lubricant as claimed in claim 1 , further comprising second discrete particles including ethylene bisstearamide, wherein the first discrete particles further comprise the at least one fatty amide wax, and the fatty amide wax comprises erucamide.

9 . The particulate composite lubricant as claimed in claim 7 , wherein the particulate composite lubricant is free of second discrete particles.

10 . The particulate composite lubricant as claimed in claim 1 , wherein the particulate composite lubricant is stearate free.

11 . The particulate composite lubricant as claimed in claim 1 , comprising between about 10 wt % and about 99.5 wt % of the at least one fatty amide wax.

12 . The particulate composite lubricant as claimed in claim 1 , comprising between about 0.5 wt % and about 90 wt % of the Montan acid ester wax.

13 . The particulate composite lubricant as claimed in claim 12 , wherein a remaining portion of the particulate composite lubricant comprises the at least one fatty amide wax and a metal oxide nanoparticle coating.

14 . A particulate composite lubricant for powder metallurgy comprising first discrete particles comprising Montan acid ester wax and second discrete particles comprising an organic, metal-free pulverulent lubricant selected from the group consisting of fatty bisamide waxes, fatty monoamide waxes, glycerides, Montan acid ester waxes, paraffin wax, polyolefines, polyamides, polyesters, and mixtures thereof, wherein the particulate composite lubricant comprises at least one fatty amide wax including at least one of a fatty monoamide wax and a fatty bisamide wax.

15 . The particulate composite lubricant as claimed in claim 14 , wherein the second discrete particles comprise the fatty bisamide wax and the second discrete particles further comprise the Montan acid ester wax.

16 . The particulate composite lubricant as claimed in claim 14 , wherein the first discrete particles are at least partially coated with metal oxide nanoparticles.

17 . The particulate composite lubricant as claimed in claim 14 , wherein the first discrete particles further comprise the fatty bisamide wax.

18 . The particulate composite lubricant as claimed in claim 14 , wherein the particulate composite lubricant is stearate free.

19 . The particulate composite lubricant as claimed in claim 14 , comprising between about 10 wt % and about 99.5 wt % of the at least one fatty amide wax.

20 . The particulate composite lubricant as claimed in claim 14 , comprising between about 0.5 wt % and about 90 wt % of the Montan acid ester wax.

21 . A metallurgical powder composition, comprising a metal-based powder admixed with the particulate composite lubricant as claimed in claim 1 .

22 . The metallurgical powder composition as claimed in claim 21 , wherein the metal-based powder is an iron-based powder.

23 . A process for producing a powder composition for powder metallurgy, comprising:
adding a particulate composite lubricant as claimed in claim 1 in a concentration ranging between about 0.1 wt % to about 5 wt %, based on a total weight of the powder composition, to a metal-based powder.

24 . The process as claimed in claim 23 , wherein the metal-based powder is an iron-based powder.

Assignees

• Nat Res Council Canada

Inventors

• Thomas Yannig
• Paris Vincent
• St-Laurent Sylvain

Classifications

• C10N2020/06

  Particles of special shape or size · CPC title

• C10N2050/14

  Composite materials or sliding materials in which lubricants are integrally molded · CPC title

• C10N2040/20

  Metal working · CPC title

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title

• B22F1/103

  containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent · CPC title