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
Title | Year | Author | Number |
---|---|---|---|
FOUNDRY INVAR ALLOY BASED ON IRON | 2020 |
|
RU2751391C1 |
IRON-BASED INVAR ALLOY | 2023 |
|
RU2820430C1 |
CAST IRON-BASED INVAR ALLOY | 2020 |
|
RU2718842C1 |
IRON-BASED CASTING ALLOY | 2023 |
|
RU2818196C1 |
IRON-BASED CASTING ALLOY | 2023 |
|
RU2813349C1 |
CASTABLE IRON-BASED ALLOY | 2003 |
|
RU2243281C1 |
IRON-BASED CASTING ALLOY | 2004 |
|
RU2266972C1 |
IRON-BASED CASTABLE ALLOY | 2000 |
|
RU2183228C1 |
IRON-BASED CASTING ALLOY | 2020 |
|
RU2762954C1 |
IRON BASED CAST ALLOY | 2014 |
|
RU2551328C1 |
Authors
Dates
2021-09-21—Published
2020-12-02—Filed