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High-plasticity easy-to-process cobalt-based deformation high-temperature alloy and preparation method thereof

A deformable superalloy and easy-to-process technology, which is applied in the field of high-plasticity and easy-to-process cobalt-based deformed superalloy and its preparation, can solve the problems of low yield and long process flow, etc., to improve plasticity, solve long process flow, and improve cooling. Effect of hot workability

Pending Publication Date: 2020-11-20
BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a highly plastic and easy-to-process cobalt-based deformed superalloy and its preparation method, which solves the problems of long process flow and low yield of existing cobalt-based deformed superalloys

Method used

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  • High-plasticity easy-to-process cobalt-based deformation high-temperature alloy and preparation method thereof
  • High-plasticity easy-to-process cobalt-based deformation high-temperature alloy and preparation method thereof
  • High-plasticity easy-to-process cobalt-based deformation high-temperature alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A highly plastic and easy-to-process cobalt-based deformed superalloy and a preparation method thereof, select raw materials with satisfactory purity, including Co, C, Cr, Ni, W, Mn, Fe, Al, Y and unavoidable impurities. In the vacuum induction furnace, the raw materials are melted, refined, and the electrode rods are poured to complete the vacuum induction furnace smelting; the cast electrode rods are used for electroslag remelting and smelting, and the diameter of the electroslag ingot is 150mm. The mass percentages of each element and impurity elements are shown in Table 1.

[0030] The electroslag ingot is subjected to diffusion annealing, the annealing temperature is 1200°C, the time is 20h, and air-cooled after heat preservation. The forging temperature range is 910-1010°C, and it is formed by one-fire forging. . The cold drawing deformation is controlled within the range of 49-60%, the heat treatment temperature is 1180-1200°C, the holding time is 5-120 minutes...

Embodiment 2

[0033] A highly plastic and easy-to-process cobalt-based deformed superalloy and a preparation method thereof, select raw materials with satisfactory purity, including Co, C, Cr, Ni, W, Mn, Fe, Al, Y and unavoidable impurities. In the vacuum induction furnace, the raw materials are melted, refined, and the electrode rods are poured to complete the vacuum induction furnace smelting; the cast electrode rods are used for electroslag remelting and smelting, and the diameter of the electroslag ingot is 350mm. The mass percentages of each element and impurity elements are shown in Table 1.

[0034] The electroslag ingot is subjected to diffusion annealing, the annealing temperature is 1230°C, the time is 50h, and air-cooled after heat preservation. The forging temperature range is 1180-1230°C, and it is formed by one-fire forging. The forging specification is 80×250mm, and then hot-rolled. The hot-rolling temperature range is 1200-1250°C. ×250mm.

[0035] The cold rolling deformat...

Embodiment 3

[0038] A highly plastic and easy-to-process cobalt-based deformed superalloy and a preparation method thereof, select raw materials with satisfactory purity, including Co, C, Cr, Ni, W, Mn, Fe, Al, Y and unavoidable impurities. In the vacuum induction furnace, the raw materials are melted, refined, and the electrode rods are poured to complete the vacuum induction furnace smelting; the cast electrode rods are used for electroslag remelting and smelting. For an electroslag ingot with a diameter of 250mm, the mass percentage of each element and impurity elements is shown in Table 1.

[0039] The electroslag ingot is subjected to diffusion annealing, the annealing temperature is 1200°C, the time is 30h, and air-cooled after heat preservation. The forging temperature range is 1120-1180°C, and it is formed by one-fire forging. The forging specification is 80×80mm, and then hot-rolled. The hot-rolling temperature range is 1100-1150°C. It is formed by one-fire hot-rolling. .

[004...

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Abstract

The invention discloses a high-plasticity easy-to-process cobalt-based deformation high-temperature alloy and a preparation method thereof, and belongs to the technical field of deformation high-temperature alloy materials. Components of the alloy comprise, by weight percent, 0.08%-0.13% of C, not larger than 0.4% of Si, 1.0%-2.0% of Mn, 9.0%-11.0% of Ni, 19.0%-21.0% of Cr, 14.0%-16.0% of W, 0.3%-1.0% of Al, not larger than 3.0% of Fe and the balance Co and inevitable impurities and other elements. The preparation method of the alloy comprises the steps that after being blended, materials aremolten in a vacuum induction furnace; cast electrode bars are used for electroslag remelting; after a steel ingot is subjected to homogenizing annealing, air cooling is carried out; the forging temperature ranges from 910 DEG C to 1230 DEG C, heat treatment is carried out at the temperature ranging from 1180 DEG C to 1240 DEG C, and air cooling is carried out after heat preservation; and cold drawing deformation ranges from 48% to 60%. The alloy and the preparation method have the advantages that through adding of elements Al and Y, on the premise that strength is not reduced, the cold and heat processing performance of the alloy is improved, and plasticity, the technological process and the yield of the alloy are improved

Description

technical field [0001] The invention belongs to the technical field of deformed superalloy materials, and in particular relates to a cobalt-based deformed superalloy with high plasticity and easy processing and a preparation method thereof. Background technique [0002] Cobalt-based deformed superalloys use cobalt as the main component and contain a considerable amount of alloying elements such as nickel, chromium, and tungsten. It has certain high temperature strength, good thermal corrosion resistance and oxidation resistance under the condition of 730-1100 °C. It is suitable for making aero-engines, industrial gas turbines, combustion chamber hot-end parts of naval gas turbines, and diesel engine nozzles. In recent years, this type of alloy has also been widely used in medical brackets and nuclear industries. Compared with nickel-based superalloys, cobalt-based superalloys have higher melting points, better thermal corrosion resistance, and thermal fatigue resistance. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C22C1/02C22B9/18C22F1/10
CPCC22B9/18C22C1/02C22C19/07C22F1/10Y02P10/25
Inventor 章清泉魏然文新理牛永吉李国超
Owner BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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