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)

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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
Application number
MDA20070052A
Other languages
Romanian (ro)
Other versions
MD3606G2 (en
Inventor
Vladimir Parsutin
Anatolii PARAMONOV
Emil Pasincovschi
Vasile Agafii
Original Assignee
Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei filed Critical Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei
Priority to MDA20070052A priority Critical patent/MD3606G2/en
Publication of MD3606F1 publication Critical patent/MD3606F1/en
Publication of MD3606G2 publication Critical patent/MD3606G2/en

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  • 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.
MDA20070052A 2007-02-27 2007-02-27 Process for activating the tungsten-containing hard alloys surfaces for low-temperature brazing (variants) MD3606G2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

Cited By (2)

* Cited by examiner, † Cited by third party
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