PL736B1 - A method of obtaining alloys of metals of the iron and chromium group with silicon or its compounds. - Google Patents
A method of obtaining alloys of metals of the iron and chromium group with silicon or its compounds. Download PDFInfo
- Publication number
- PL736B1 PL736B1 PL736A PL73620A PL736B1 PL 736 B1 PL736 B1 PL 736B1 PL 736 A PL736 A PL 736A PL 73620 A PL73620 A PL 73620A PL 736 B1 PL736 B1 PL 736B1
- Authority
- PL
- Poland
- Prior art keywords
- silicon
- alloys
- iron
- metals
- compounds
- Prior art date
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- 229910045601 alloy Inorganic materials 0.000 title claims description 10
- 239000000956 alloy Substances 0.000 title claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 6
- 229910052710 silicon Inorganic materials 0.000 title claims description 6
- 239000010703 silicon Substances 0.000 title claims description 6
- 229910052742 iron Inorganic materials 0.000 title claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims 2
- 229910052751 metal Inorganic materials 0.000 title claims 2
- 239000002184 metal Substances 0.000 title claims 2
- 150000002739 metals Chemical class 0.000 title claims 2
- 238000000034 method Methods 0.000 title claims 2
- 150000001875 compounds Chemical class 0.000 title 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 239000011651 chromium Substances 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
Description
Znana kwasotrwale stopy krzemu, np. z zelazem wykrystalizowane, w przeciwien¬ stwie do plynnych, wykazuja wzglednie mala moznosc rozpuszczania sie wobec weglika, która zmniejsza sie przy wzmagajacej sie zawartosci krzemu. Stopy te wydzielaja pod¬ czas tezenia wszystek weglik, uwolniony z plynnego stopionego materjalu, ponad „eu- teticum". Zjawisko to znane jest w prakty¬ ce jako nieprzyjemne „tworzenie sie grafitu spienionego czystego", które przechodzi wielkiemi gniazdami przaz odlewy i czesto czyni je niezdatnemi do uzytku.Z tej przyczyny okreslano stopien zawar- •tosci weglika w tych stopach mozliwie nisko, równoczesnie starano sie tym sposobem zmniejszyc równiez niepozadana twardosc.Nie zwazajac -na to, ze praktycznie na skale przemyslowa nie mozna otrzymac po¬ wyzszych stopów wolnych od weglika, wy¬ nalazca stwierdzil, ze wlasnie przeciwnie twardosc stopu zmniejsza sie znacznie z wzrastajaca zawartoscia weglika tak, ze np. przy zawartosci krzemu od 13—25% i zawartosci weglika pomad 0,65 % nastepuje powazne zmiekczenie, a juz przy zawartosci weglika 0,8—1 % stop mozna obrabiac zia- pomoca naJrzedzi, tnacych wióry.Wynalazca stwierdzil nastepnie, ze wy¬ niki powyzsze osiaga sie tylko wtedy, jezeli przeprowadzi sie krystalizacje tak, ze usu¬ wa sie, o ile moznosci, tworzamie sie cemen¬ tytu krzemowego, a weglik przeprowadza sie w znacznej czesci na modyfikacje grafitowa.Powyzsze osiagnac mozna;, jak stwier¬ dzono dalej, najpewniej, jezeli stopy steza sie w formach odlewniczych z interwalu temperatury, polozonego .mozliwie bliskopunktu topienia, w przeciwienstwie do ste¬ zania od wyzszych temperatur, podczas któ¬ rego nastepuje tworzenie utwardzajacych ¦cementytów krzemowych. Przez opisane srodki staja sie stopy bardzo drobno ziar¬ niste, miekkie i latwe do obróbki. PLThe known acid-fast silicon alloys, for example crystallized with iron, in contrast to liquid ones, show a relatively low dissolution ability towards carbide, which decreases with increasing silicon content. During the thesis, these alloys emit all the carbon released from the molten material above "euteticum". This phenomenon is known in practice as the unpleasant "formation of foamed pure graphite", which passes through large cavities in the castings and often makes For this reason, the degree of carbon content in these alloys was determined as low as possible, and at the same time efforts were made to reduce the undesirable hardness. Regardless of the fact that it is practically impossible to obtain higher free alloys on an industrial scale from the carbide, the inventor found that on the contrary, the hardness of the alloy decreases significantly with increasing carbon content, so that e.g. with a silicon content of 13-25% and a carbon content above 0.65%, there is a serious softening, and even with the carbide content 0.8-1% alloy can be machined with tools that cut chips. The inventor then stated that the above results are only achieved if Crystallization is carried out in such a way that it is removed, if possible, to form a silicon cement, and the carbon is largely converted to graphite modification. The above can be achieved, as stated below, most likely if the alloys are in casting molds with a temperature interval located as close as possible to the melting point, as opposed to higher temperatures, during which the formation of hardening silicon cementites occurs. The described measures make the alloys very fine-grained, soft and easy to work with. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL736B1 true PL736B1 (en) | 1924-10-31 |
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