MD561Y - Process for anticorrosion machining of steel - Google Patents
Process for anticorrosion machining of steel Download PDFInfo
- Publication number
- MD561Y MD561Y MDS20120031A MDS20120031A MD561Y MD 561 Y MD561 Y MD 561Y MD S20120031 A MDS20120031 A MD S20120031A MD S20120031 A MDS20120031 A MD S20120031A MD 561 Y MD561 Y MD 561Y
- Authority
- MD
- Moldova
- Prior art keywords
- machining
- coating
- steel
- carried out
- thermochemical
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 3
- 238000003754 machining Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 3
- 239000010959 steel Substances 0.000 title abstract 3
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 239000003792 electrolyte Substances 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- 238000005275 alloying Methods 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000010892 electric spark Methods 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000011089 mechanical engineering Methods 0.000 abstract 1
- 229910017464 nitrogen compound Inorganic materials 0.000 abstract 1
- 150000002830 nitrogen compounds Chemical class 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 235000010344 sodium nitrate Nutrition 0.000 abstract 1
- 239000004317 sodium nitrate Substances 0.000 abstract 1
- 235000018553 tannin Nutrition 0.000 abstract 1
- 229920001864 tannin Polymers 0.000 abstract 1
- 239000001648 tannin Substances 0.000 abstract 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to electrical and thermochemical processes for machining of steel products and can be used in mechanical engineering and instrument engineering for improving the corrosion resistance of machine parts, tools and production tooling.The process, according to the invention, consists in that it is carried out the layer-by-layer electric-spark alloying of the steel part surface with a pulse duration of 10…2500 µs, a frequency of 1500…25 Hz correspondingly, with the obtaining of a coating, then it is carried out the anodic thermochemical machining of the obtained coating for 1…5 minutes in an electrolyte containing inorganic nitrogen compounds with the addition of 0.5…15 g/l of tannin at the electrode voltage of 150…220 V, current density of 1…20 A/cm2 and anode temperature of 600…900°C with subsequent quenching-oxidation in the electrolyte. After that the part is maintained during 3…5 hours in concentrated phosphoric acid and/or sodium nitrate solution with a concentration of 30…150 g/l at the temperature of 70…100°C, then the part is washed, dried and the coating pores are electrolytically filled with insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDS20120031A MD561Z (en) | 2012-02-08 | 2012-02-08 | Process for anticorrosion machining of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDS20120031A MD561Z (en) | 2012-02-08 | 2012-02-08 | Process for anticorrosion machining of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD561Y true MD561Y (en) | 2012-11-30 |
| MD561Z MD561Z (en) | 2013-06-30 |
Family
ID=47296864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDS20120031A MD561Z (en) | 2012-02-08 | 2012-02-08 | Process for anticorrosion machining of steel |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD561Z (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU461161A1 (en) * | 1971-07-13 | 1975-02-25 | Институт Прикладной Физики Ан Мсср | The method of chemical heat treatment of metals |
| SU969761A1 (en) * | 1980-02-20 | 1982-10-30 | Институт Прикладной Физики Ан Мсср | Method and electrolyte for decarburizing steel |
| SU1087566A1 (en) * | 1982-12-23 | 1984-04-23 | Киевский Ордена Трудового Красного Знамени Институт Инженеров Гражданской Авиации | Method for improving products of structural steels |
| MD1053G2 (en) * | 1997-04-10 | 1999-05-31 | Uzina Experimentala A Institutului De Fizica Aplicata Al Academiei De Stiinte A Republicii Moldova | Process for electrospark alloying |
| MD2959C2 (en) * | 2004-06-29 | 2006-08-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for steel article working for anticorrosive superficial layer obtaining |
| MD3708G2 (en) * | 2007-05-23 | 2009-04-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for enhancing the corrosion resistance of steel |
| MD3974C2 (en) * | 2008-01-23 | 2010-06-30 | Павел ТОПАЛА | Proces for metal surface hardening by electric discharges |
| MD164Z (en) * | 2009-04-15 | 2010-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for brazing sintered hard alloys and carbon steels |
| MD192Z (en) * | 2009-06-04 | 2010-11-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for thermochemical treatment of steel articles |
| MD336Z (en) * | 2010-03-03 | 2011-09-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for thermochemical machining of metal articles |
-
2012
- 2012-02-08 MD MDS20120031A patent/MD561Z/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| MD561Z (en) | 2013-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG9Y | Short term patent issued | ||
| KA4Y | Short-term patent lapsed due to non-payment of fees (with right of restoration) |