Purification of tungsten carbide compositions
US-9656873-B2 · May 23, 2017 · US
Grade powders and sintered cemented carbide compositions
US10940538B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10940538-B2 |
| Application number | US-201715675078-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 11, 2017 |
| Priority date | Aug 11, 2017 |
| Publication date | Mar 9, 2021 |
| Grant date | Mar 9, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
In one aspect, grade powder compositions are described herein comprising electrochemically processed sintered carbide scrap. In some embodiments, a grade powder composition comprises a reclaimed powder component in an amount of at least 75 weight percent of the grade powder composition, wherein the reclaimed carbide component comprises electrochemically processed sintered carbide scrap.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sintered cemented carbide article comprising: a reclaimed carbide phase in an amount of at least 70 weight percent of the sintered cemented carbide article; and metallic binder, wherein the reclaimed carbide phase comprises electrochemically processed sintered carbide scrap in an amount of 60-90 weight percent, and a balance of zinc processed sintered carbide scrap and/or ammonium paratungstate processed sintered carbide scrap, and the sintered cemented carbide article has a transverse rupture strength of 350-600 ksi. 2. The sintered cemented carbide article of claim 1 , wherein the reclaimed carbide phase is present in an amount of 90-99 weight percent of the sintered cemented carbide article. 3. The sintered cemented carbide article of claim 1 , wherein the electrochemically processed sintered carbide scrap comprises tungsten carbide. 4. The sintered cemented carbide article of claim 1 further comprising at least one metal carbide selected from the group consisting of Group IVB metal carbides, Group VB metal carbides and Group VIB metal carbides. 5. The sintered cemented carbide article of claim 1 having fracture toughness of 5-20 ksi(in 1/2 ). 6. The sintered cemented carbide article of claim 1 , wherein the electrochemically processed sintered carbide scrap has an average particle size of 0.5 μm to 15 μm. 7. The sintered cemented carbide article of claim 1 having density of 14-15 g/cm 3 . 8. The sintered cemented carbide article of claim 1 having hardness of 80-95 HRA. 9. The sintered cemented carbide article of claim 1 having the shape of a cutting element. 10. The sintered cemented carbide article of claim 1 having a transverse rupture strength of 400-600 ksi. 11. The sintered cemented carbide article of claim 1 having fracture toughness of 10-20 ksi(in 1/2 ). 12. The sintered cemented carbide article of claim 1 , wherein the sintered cemented carbide article is free of lower carbide phases. 13. A sintered cemented carbide article comprising: a virgin carbide phase; a reclaimed carbide phase in an amount of at least 70 weight percent of the sintered cemented carbide article; and metallic binder, wherein the reclaimed carbide phase comprises electrochemically processed sintered carbide scrap in an amount of 60-90 weight percent, and a balance of zinc processed sintered carbide scrap and/or ammonium paratungstate processed sintered carbide scrap, wherein the sintered cemented carbide article has a transverse rupture strength of 350-600 ksi. 14. The sintered cemented carbide article of claim 13 having fracture toughness of 10-20 ksi(in 1/2 ). 15. A sintered cemented carbide article comprising: a reclaimed carbide phase in an amount of at least 70 weight percent of the sintered cemented carbide article; and metallic binder, wherein the reclaimed carbide phase comprises electrochemically processed sintered carbide scrap in an amount of 50-85 weight percent, and a balance of zinc processed sintered carbide scrap and/or ammonium paratungstate processed sintered carbide scrap, and the sintered cemented carbide article has a transverse rupture strength of 350-600 ksi. 16. A sintered cemented carbide article comprising: a virgin carbide phase; a reclaimed carbide phase in an amount of at least 70 weight percent of the sintered cemented carbide article; and metallic binder, wherein the reclaimed carbide phase comprises electrochemically processed sintered carbide scrap in an amount of 50-85 weight percent, and a balance of zinc processed sintered carbide scrap and/or ammonium paratungstate processed sintered carbide scrap, wherein the sintered cemented carbide article has a transverse rupture strength of 350-600 ksi.
Assignees
Inventors
Classifications
Agglomerating · CPC title
- B22F3/02Primary
Compacting only · CPC title
from scrap particles · CPC title
Spray drying of solutions or suspensions · CPC title
Sintering only · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10940538B2 cover?
- In one aspect, grade powder compositions are described herein comprising electrochemically processed sintered carbide scrap. In some embodiments, a grade powder composition comprises a reclaimed powder component in an amount of at least 75 weight percent of the grade powder composition, wherein the reclaimed carbide component comprises electrochemically processed sintered carbide scrap.
- Who is the assignee on this patent?
- Kennametal Inc
- What technology area does this patent fall under?
- Primary CPC classification B22F3/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 09 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).