SU554703A1 - Iron-base dispersion-hardening alloy - Google Patents

Description

The invention relates to the field of metallurgy, in particular, to dispersion hardening alloys with a low temperature coefficient, a modulus of normal elasticity, used for the manufacture of structural parts for special purposes. Known dispersion-hardening alloy based on iron, containing the following components, wt.%: Nickel42-43 Cobalt0.35 Chromium5.0 Titanium2.75 Aluminum0.3 Manganese0, e Silicon0.5 IronOther 1 The disadvantage of the known alloy is with its low physical mechanical fasteners Ba (d 14O kgf / m y. - 126 kgf / mm 87%). , OD The closest to the proposed alloy to the technical essence and achievable effect is the dispersion-hardening iron-based alloy of the following composition, wt.%: Nickel34-38 Cobalt121-16 Tungsten6-8 Titanium2.3 Aluminum0.0.8 Manganese 0.2 -O, 8 BorO, 001-O, 03 Cerium0, O01-O, O5 IronOstal 2, Its disadvantage is its low physio-mechanical properties (6 14555 kgf / mm, eflkl 13O-14O kgf / mm G 3%, E 17200 Krc / Mjh). In order to increase the physicomechanical properties of the alloy, it is proposed to introduce silicon and lanthanum into the go composition by following the correlation of components, weight%: Nickel34-38 Cobalt 16.2-18.5 Oxen 6-6-8 Titanium 2.3-3 Aluminum6.3- 0.8 Manganese 0.2-0.8 0.001-0.05 0.001-0.05 Silicon 0.4-1.4 Lanthanum 0.01-0.2 Iron Else The mechanical properties of the proposed alloy after heat treatment with the following:. Tensile strength 1 PHY tensile Dgs / mm 165-170 Yield point in. / Zch I. 145-150 kgf / mm Relative elongation (81,% 2-4 Elastic modulus (E), kgf / mm 1700О172ОО Thermal expansion coefficient, 1 / deg (8.3-8.5). Example. Alloys melted in a vacuum furnace and subjected to the following thermal treatment: quenching in water, cold working 40% aging for 8 hours The composition and properties of the alloys are given in Tables 1 and 2.

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Claims (2)

Invention Formula An iron-based dispersion-hardening alloy containing nickel, cobalt, tungsten, titanium, aluminum, manganese, boron and cerium, characterized in that, in order to improve the physics of mechanical properties, it additionally contains silicon and lanthanum with the following ratio of components, weight.%: Nickel34-38 Cobalt 16,2-18,5 Tungsten 6-8 Titan2,3-3 O, 3, 8 0.2-0.8 0.001-0.05 0.001-0.05 0.4-1.4 0.01-O, 2 Rest Sources of information taken into account in the examination; 1. Patent of England No. 983421, cl. C 7 A, 1966 2. USSR author's certificate No. 437427, KL.1 C 22 C 38/08, 1972.