FIELD: metallurgy. ;SUBSTANCE: invention relates to the field of metallurgy, namely to the foundry production of invar alloys with a minimum temperature coefficient of linear expansion (TCLE), and can be used for the manufacture of equipment, including large-sized ones, used in the production of products made of composite materials (PCM materials), in particular from carbon composites. The foundry invar alloy based on iron contains, by wt. %: nickel (Ni) 32.0-34.5, cobalt (Co) 2.0-3.5, carbon (C) 0.75-1.5, copper (Cu) 0.12 – 0.25, silicon (Si) 0.18-0.28, manganese (Mn) 0.01-no more than 0.3, at least one component selected from the group of rare earth elements (REM): cerium, lanthanum and yttrium in the sum of 0.05-0.10, the rest is iron and unavoidable impurities. The following conditions are met, by wt. %: Cu + Si = 0.3-0.53, Cu / Si = 0.55-1.0, Ni + Co = 35.4-37.0, Ni / Co = 9.2-17.0, (Ni + Co) / C = 24-49. ;EFFECT: alloy has a TCLE in the temperature range of 20-200° at a level not exceeding 2.5×10-6 К-1 with significantly improved casting properties, namely: the fluidity of the alloy is at the level of 210-230 mm according to a complex coquille U-shaped sample. ;1 cl, 4 dwg
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机译：领域：冶金。 ;物质：发明涉及冶金领域，即铸造铸造生产具有最小温度系数的线性膨胀（Tcle），并且可用于制造设备，包括大型尺寸的设备，用于制造生产由复合材料（PCM材料）制成的产品，特别是碳复合材料。基于铁的铸造Invar合金包含wt。 ％：镍（Ni）32.0-34.5，钴（Co）2.0-3.5，碳（c）0.75-1.5，铜（Cu）0.12-0.25，硅（Si）0.18-0.28，锰（Mn）0.01-不再在0.05-0.10中，铈，镧和钇中选择的至少一个组分，其中铈，镧和钇中选择，其余是铁和不可避免的杂质。通过wt满足以下条件。 ％：Cu + Si = 0.3-0.53，Cu / Si = 0.55-1.0，Ni + Co = 35.4-37.0，Ni / Co = 9.2-17.0，（Ni + Co）/ c = 24-49。 ;效果：合金在温度范围内具有20-200°的温度范围，水平不超过2.5×10-6к-1，铸造性能显着改善，即：合金的流动性在210-230根据复杂的Coquille U形样品。 ; 1 cl，4 dwg
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