PL826B1 - An alloy that maintains considerable strength and is completely unbreakable at the lowest temperatures achievable in the industry. - Google Patents

Description

* It has been a long time since the brittleness of various grades of ordinary steel and most of the grades of special steels increases very quickly as the temperature drops. Hence, during the winter, railroad rails and also wagon axles often break. At the temperatures reached by condensing the air, iron and steel show excessive brittleness and crack, similar to glass at the slightest impact. This property was for a longer time. Black color is a serious obstacle in the construction of machines operating at very low temperatures, since they were parts that receive more or less strong impacts in motion, especially in air condensing machines (Claude system) engine valves partially, where the expansion takes place, it must not show brittleness at a fall-down temperature below 180 °. The present invention relates to an alloy consisting essentially of iron, nickel and manganese and exhibiting high limits of elasticity at the lowest temperatures achievable in the industry and great mechanical strength with complete removal of brittleness. For example, we present an alloy containing: nickel manganese iron 40 to 70 ° / 0 0.8 to 5 ° / 0 . . the rest. Variation in the composition of the alloy within wide limits makes it possible, in the absence of lameness, to achieve this or that secondary property, such as expansion, electrical, mechanical properties, elasticity, and thus one or more additional elements can also be introduced: carbon up to 1 ° / and chrome up to 5%, copper up to 10 ° / 0, cobalt up to 10 ° / 0. In addition, the addition of 0.2 to 10% vanadium, 0.1 to 0.5% of titanium has a beneficial effect on the quality and ease of processing. Such an alloy has a number of valuable mechanical properties and iron-nickel alloys (ferronickel) reversible, and the composition defined for it prevents any irreversible transformation and any change from the action of cold. At the boiling point of nitrogen (195 °), the limit of elasticity ranges from 35 to 45 kg / mm 2 and the mechanical strength is from 65 to 75 kg / mm 2. The elastic energy measured under the woman's Fremon, under normal conditions, reaches 50 kgm at the temperature normal and retains its value up to 195 °. For comparison, it should be noted that the softest iron shows energy of only 1 to 2 kgm at such a low temperature. # Moreover, this new alloy does not oxidize and is practically completely resistant to the action of cold acids. It is possible to give it the expandability of iron or steel if necessary, and thus to achieve, at low temperatures, the maintenance of a meticulous adjustment, to that of an ordinary temperature. Finally, machine parts made of this alloy can withstand repetitive stress without deformation or overgrowth. PL PL

Claims (1)

Patent claims. 1. An alloy of iron, nMu and miamgamiu, very resistant and completely free from brittleness at the lowest temperatures achieved in the industry, and suitable especially for the production of machine parts used for the skin of gas foam, characterized by a content of 40 to 70% nickel, 0.8 to 5% manganese, and residual iron. 2, Sitop, submarine of claim 1, a place characterized by the fact that a part of the ironization is absorbed by one or more of the pemiastics: carbon up to 10%, chromium up to 5%, copper up to 10%, cobalt up to 10%, vanadium 0 , 1 to 0.2% and titanium 0.1-0.5%. Societc Anonyme de Commentry, Four chambault & Decazeville. Deputy: M. Skrzypkowski, patent officer. ZAKL8RAF.K0ZIANSK1CH INKRAMIWIE PL PL