SI8012056A8 - Process for improving the corrosion resistance of nitrated elements made of iron materials - Google Patents
Process for improving the corrosion resistance of nitrated elements made of iron materials Download PDFInfo
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- SI8012056A8 SI8012056A8 SI8012056A SI8012056A SI8012056A8 SI 8012056 A8 SI8012056 A8 SI 8012056A8 SI 8012056 A SI8012056 A SI 8012056A SI 8012056 A SI8012056 A SI 8012056A SI 8012056 A8 SI8012056 A8 SI 8012056A8
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- nitrated
- iron materials
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Description
POSTUPAK ZA POVEČANJE KOROZIONE OTPORNOSTIPROCEDURE FOR INCREASING CORROSION RESISTANCE
NITRIRANIH ELEMENATA OD GVOZDENIH MATERIJALANITRATED IRON MATERIALS
Oblast tehnikeTechnical field
Pronalazak je iz oblasti obrade gvozdenih materijala u cilju povečanja njihove otpornosti i odnosi se na postupak za povečanje korozione otpor nosti nitriranih elemenata od gvozdenih materijala oksidacionim tretmanom koji se primenjuje posle sprovedenog procesa nitriranja (MKP C 23 C 11/16).The invention relates to the treatment of iron materials in order to increase their resistance and relates to a process for increasing the corrosion resistance of nitrated elements of iron materials by oxidative treatment applied after the nitration process has been carried out (MKP C 23 C 11/16).
Tehnički problemTechnical problem
Tehnički problem koji se rešava ovim pronalaskom je u torne da se pronade jedan postupak za poboljšanje korozione otpornosti nitriranih elemenata od gvozdenih materijala pomoču oksidacionog tretmana nakon izvedenog procesa nitriranja, koji bi bio ekonomičen i primenljiv za sve gvozdene materi jal e.A technical problem to be solved by the present invention is to provide a process for improving the corrosion resistance of nitrided elements of iron materials by means of an oxidation treatment after a nitridation process has been performed which would be economical and applicable to all iron materials.
- 2 Stanje tehnike- 2 State of the art
Nitriranjem elemenata od gvozdenih materijala povečava se i njihova koroziona otpornost sa izuzetkom nerdajučih i kiselo otpornih Čelika.Nitrating elements of iron materials also increases their corrosion resistance with the exception of stainless and acid resistant steels.
Ovo je več davno poznato. Efekat koji se postiže je nezavisan od primenjenog postupka nitriranja.This has long been known. The effect that is achieved is independent of the nitration process used.
Kod industrijke primene nitriranja u cilju poboljšavanja otpornosti na habanje i trajne čvrstoče, kao što je to uglavnom do sada činjeno, poboljšanje korozione otpornosti se smatra korisnim sporednim efektom.Još nije poznat slučaj da je nitriranje vršeno isključivo u cilju povečanja korozione otpornosti. Za ovo su poznate bolje metode kao što je na primer, hromiranje i torne slično.In the industrial application of nitriding to improve abrasion resistance and durability, as has been generally done so far, the improvement of corrosion resistance is considered a useful side effect. It is not yet known that nitriding was performed solely for the purpose of increasing corrosion resistance. Better methods are known for this, such as chrome plating and friction.
Takode je u tehnici poznata kombinacija nitriranja sa dejstvovanjem pare na relativno visokoj temperaturi, ali ovaj postupak služi isključivo za poboljšanje otpornosti na 'habanje tvrdoga gusa. Ovaj tretman vodi i poboljšanju oksidacione postojanosti, ali je ovaj postupak po svojoj primeni vrlo ograničen i služi samo za tretiranje navedenih materijala.Also known in the art is a combination of nitriding with the action of vapor at a relatively high temperature, but this process serves solely to improve the abrasion resistance of hard geese. This treatment also leads to the improvement of oxidation stability, but this process is very limited in its application and serves only for the treatment of said materials.
U tehnici do sada nije primenjivan naknadni tretman nitriranih delova u oksidacionim sonom kupatilu u cilju poboljšanja korozione otpornosti nitriranih elemenata od gvozdenih materijala, te je stoga postupak prema pronalasku potpuno nov.Subsequently, no subsequent treatment of nitrided parts in the oxidation bath has been applied in the art in order to improve the corrosion resistance of the nitrided elements of iron materials, and therefore the process according to the invention is completely new.
Iz DE-OS 25 14 398 poznat je postupak za naknadni tretman nitriranih delova u sonom kupatilu radi neutralisanja cijanida i cijanata.Ovaj postupak se od postupka prema pronalasku razlikuje kako po sastavu sonog kupatila, tako i po ostalim parametrima postupka tj. vremenu zadržavanja elemenata u kupatilu i odgovarajučoj temperaturi.DE-OS 25 14 398 discloses a procedure for the subsequent treatment of nitrided parts in a salt bath to neutralize cyanide and cyanate. This procedure differs from the process according to the invention both in composition of the salt bath and in other parameters of the process, ie. the residence time of the elements in the bathroom and the appropriate temperature.
- 3 Opis rešenje tehničkog problema sa primerima izvodenja- 3 Description solution of a technical problem with examples of execution
Navedeni tehnički problem reševa se postupkom prema pronalasku, koji kao celina predstavlja novost i obuhvata potapanje nitriranih elemenata od gvozdenih materijala u tečno sono kupatilo, koje pored alkalnog hidroksida sadrži i oksidacionu supstancu kao što je alkalni nitrat u količini od 2 do 20 masenih % i izlaže u tom kupatilu oksidacionom tretmanu u trajanju od 15 do 50, a prvenstveno u trajanju od 25 do 45 minuta.Said technical problem is solved by the process of the invention, which as a whole is novel and involves the immersion of nitrated elements of iron materials in a liquid sonorous bath, which in addition to the alkaline hydroxide also contains an oxidizing substance such as alkaline nitrate in an amount of 2 to 20% by weight and exhibits in that bathroom, an oxidation treatment of 15 to 50 minutes, and preferably of 25 to 45 minutes.
Dejstvo primene postupka prema pronalasku je bilo iznenadujuče, jer je konstatovano da je koroziona otpornost treti rani h elemenata ne samo znatno veča od korozione otpornosti elemenata koji su bili izloženi samo nitriranju, več i od onih elemenata koji su bili na primer, hromi rani.The effect of applying the process of the invention was surprising, since it was found that the corrosion resistance of the treated early elements was not only significantly greater than the corrosion resistance of the elements exposed only to nitration, but also of those elements which were, for example, lame wounds.
Sledeči ogled pokazuje prednosti postupka prema pronalasku:The following experiment demonstrates the advantages of the process of the invention:
Izveden je eksperiment sa prskanjem sonim rastvorom prema uobičajenom postupku na uzorcima Čelika C 15 i 42 CrMo 4, koji su bili samo nitrirani i kaljeni prema uobičajenom postupku i na uzorcima koji su bili treti rani postupkom prema pronalasku.An experiment was conducted with a saline spray according to the conventional procedure on steel C 15 and 42 CrMo 4 samples, which were merely nitrided and tempered according to the usual procedure and on the samples treated with the process according to the invention.
Merenje je vršeno u časovima sve do prve pojave korozijeMeasurements were made in the hours until the first appearance of corrosion
Vrsta Čelika C 15Type of Steel C 15
Netretiran 22 hUntreated 22 h
Ni tri ran u sonom kupatili i kaljen u vodi odn.ulju 132 hNot even three wounds in the salt bath and tempered in water or 132 h
CrMo 4 hCrMo 4 h
176 h176 h
Ni tri ran u sonom kupatilu, ohladen u kupatilu postupkom prema pronalasky(trajanje 35 n temperatura 35ouCNot even three wounds in a salt bath, cooled in a bath according to pronalasky (duration 35 n temperature 35o in C
Tvrdo hromiraniHard chrome plated
236 h236 h
190-220 h190-220 h
300 h300 h
190-220 h190-220 h
Slični rezultati su dobijeni i kod drugih korozionih ispitivanja(morska voda)Similar results were obtained in other corrosion tests (seawater)
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2934113A DE2934113C2 (en) | 1979-08-23 | 1979-08-23 | Process for increasing the corrosion resistance of nitrided components made of ferrous materials |
| YU2056/80A YU41366B (en) | 1979-08-23 | 1980-08-15 | Process for improving the corrosion resistance of nitrogenghardened components made of iron materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SI8012056A8 true SI8012056A8 (en) | 1997-06-30 |
Family
ID=25780681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI8012056A SI8012056A8 (en) | 1979-08-23 | 1980-08-15 | Process for improving the corrosion resistance of nitrated elements made of iron materials |
Country Status (2)
| Country | Link |
|---|---|
| HR (1) | HRP920529B1 (en) |
| SI (1) | SI8012056A8 (en) |
-
1980
- 1980-08-15 SI SI8012056A patent/SI8012056A8/en unknown
-
1992
- 1992-09-28 HR HRP-2056/80A patent/HRP920529B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HRP920529B1 (en) | 1996-06-30 |
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