PL737B1 - Method of obtaining alloys of metals, iron and chromium with silicon or its compounds - Google Patents

Description

Silicon compounds of the groups mentioned are an effective component of the known acid-resistant alloys of the iron and chromium group with silicon, i.e. the particles which cause resistance to acids. As silicon compounds of irons are, nip. known: Fe2 Siy Fe, Si2, Fe Si and Fe Si2. These compounds are found, for example, in iron-silicon alloys and several compounds known at the same time, it is necessary to find out with the aid of chemical and metalogical experience. In the sense of the foundry and molding technique, it is known that obtaining these alloys is difficult to obtain. Castings have only a low mechanical strength and break very often, due to the tremendous shrinkage and internal material intensity, already during the thesis in the molds. The last of the casts entails a serious travel of the product, forcing one to reject the deficiencies. the above is due to the equality of the content of silicon compounds, which between them lead to significant differences in the values of contractions and complexities. and besides, they evolve, due to the irregular arrangement of them in the iron-silicon "entheoticium", a system of alloys that is as close as and mechanically metaistia-ineffective. ., but also, for example, during the subsequent heating, which Oidlewy is subject to very often due to their use in the Chinese industry. It was then found that the above-mentioned hard-chromium, such as chromium, tungsten, etc., can be removed; , if the alloys are completely skiaid, they are also used for the benefit of the form or also in the form of a kithium compound such as: iron silicon, speech manganese, homogeneous and is- "teutecticuim", silicon 1 t, d. it is possible to achieve stoichiometrically from the components including and la a. chemical statics, and. if not - To obtain 1000 kg of melt. is forced to produce other compounds with a content of 20% silicon, then silicon is fed to a different structure. Save up to 780 kg of iron, and 220 kg of macro iron, which are then used and entered here in the wound (90%) to react according to the given1 method of melting in the mines, in this way an alloy is obtained which mairtenoskiich, electric and here d. do not correspond uniformly to the silicon compound - in practice these iron chromas can be carried out according to the Fe2 Si formula. carbon black, because during melting it is usually the physical course that plays a role, while the formation of silicon compounds is

Claims (2)

z a and s t r e z e n l a ^ P a tents e. written, ie a homogeneous chemical body- 1. Alloys from metals of the iron and chromium groups require chemical processing with silicon or its refining compounds or a chemical reaction. The above-mentioned difficulties are removed by the invention completely or to an overwhelmingly lesser degree, taking the elementary reactions of Fe — Si, the iron and chromium groups, and their "eutecti" into a single compound of silicon metals. - starting with pregnancy. 1200 ° and equilibrium. ", Using the heat released under- 2. The method of obtaining the alloys along the reaction time, due to the course of the exoter, - cutting 1, characterized by the objective of obtaining the melting of the alloy components. mania of stoichiometrically possible quantities It has been practically found that the use of silicon compounds with metals of the reactive heat group for melting iron and chromium can be reduced to a reaction to be used, in addition to other metals, the initial alloys of iron powders, such as: manganese, nickel , cobalt, also using the heat released with the same effect to the group metals of the combination of Fe + Si. Richard Walter. Deputy: C z. R a c z y n s k i, patent attorney. KOZIANSKI SCHOOLS IN KRAKIV PL