MD3606F1 - Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) - Google Patents
Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) Download PDFInfo
- Publication number
- MD3606F1 MD3606F1 MDA20070052A MD20070052A MD3606F1 MD 3606 F1 MD3606 F1 MD 3606F1 MD A20070052 A MDA20070052 A MD A20070052A MD 20070052 A MD20070052 A MD 20070052A MD 3606 F1 MD3606 F1 MD 3606F1
- Authority
- MD
- Moldova
- Prior art keywords
- tungsten
- activating
- low
- variants
- hard alloys
- Prior art date
Links
- 239000000956 alloy Substances 0.000 title abstract 6
- 229910045601 alloy Inorganic materials 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 5
- 230000003213 activating effect Effects 0.000 title abstract 2
- 238000005219 brazing Methods 0.000 title abstract 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052721 tungsten Inorganic materials 0.000 title abstract 2
- 239000010937 tungsten Substances 0.000 title abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 239000003792 electrolyte Substances 0.000 abstract 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- 238000001994 activation Methods 0.000 abstract 2
- 235000019270 ammonium chloride Nutrition 0.000 abstract 2
- 238000007725 thermal activation Methods 0.000 abstract 2
- 230000004913 activation Effects 0.000 abstract 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The invention relates to the alloy activation processes, in particular to processes for activating the tungsten-containing hard alloys surfaces for low-temperature brazing.The process, according to the first variant, includes the electrochemical activation of the alloy surface with an electrolyte, containing, g/l:NaOH��25à200NaNO3��25à200at an electric current density of 1à100 A/dm2 and the temperature of 20à25?C. The process, according to the second variant, includes the electrochemical thermal activation of the alloy surface with an electrolyte, containing, g/l:NH4Cl��100NH4OH��50at the electrode voltage of 150à220V, the electric current density of 1à2 A/dm2 and the anode temperature of 750?C.The process, according to the third variant, includes the electrochemical thermal activation of the alloy surface with an electrolyte, containing, g/l:NH4Cl��110NH4NO3��110at the electrode voltage of 150à220V, the electric current density of 1à2 A/dm2 and the anode temperature of 750?C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20070052A MD3606G2 (en) | 2007-02-27 | 2007-02-27 | Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20070052A MD3606G2 (en) | 2007-02-27 | 2007-02-27 | Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD3606F1 true MD3606F1 (en) | 2008-05-31 |
| MD3606G2 MD3606G2 (en) | 2008-12-31 |
Family
ID=39471737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20070052A MD3606G2 (en) | 2007-02-27 | 2007-02-27 | Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD3606G2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD164Z (en) * | 2009-04-15 | 2010-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for brazing sintered hard alloys and carbon steels |
| MD614Z (en) * | 2012-07-03 | 2013-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for chemicothermal treatment of steel products |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD231Z (en) * | 2009-06-04 | 2011-01-31 | Институт Прикладной Физики Академии Наук Молдовы | Method for identifying the structure of the binding phase of pseudoalloys based on tungsten |
| MD416Z (en) * | 2011-01-18 | 2012-04-30 | Институт Прикладной Физики Академии Наук Молдовы | Method for electrochemical activation of the surface of the tungsten-containing hard alloys for soldering (variants) |
-
2007
- 2007-02-27 MD MDA20070052A patent/MD3606G2/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD164Z (en) * | 2009-04-15 | 2010-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for brazing sintered hard alloys and carbon steels |
| MD614Z (en) * | 2012-07-03 | 2013-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for chemicothermal treatment of steel products |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3606G2 (en) | 2008-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG4A | Patent for invention issued | ||
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |