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Ti2AlNb-based alloy bar and preparation method and application thereof

A base alloy and rod technology, applied in the field of Ti2AlNb base alloy rod and its preparation, can solve the problems of high crack sensitivity, large deformation resistance, insufficient process plasticity, etc. Simple to use effects

Active Publication Date: 2022-04-01
BEIJING CISRI GAONA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ti 2 As an intermetallic compound material, AlNb-based alloy has high deformation resistance, insufficient process plasticity and high crack sensitivity. 2 AlNb alloys have strong microstructure heredity. Affected by the fluctuation of bar microstructure uniformity, the performance stability of forgings prepared by traditional technology has not been fully guaranteed, which affects the service performance of the alloy and the life of product components.

Method used

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  • Ti2AlNb-based alloy bar and preparation method and application thereof
  • Ti2AlNb-based alloy bar and preparation method and application thereof
  • Ti2AlNb-based alloy bar and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0028] Some embodiments of the present invention provide a Ti 2 A method for preparing an AlNb-based alloy rod, comprising the steps of:

[0029] (A) put Ti 2 AlNb-based alloy ingots are subjected to homogenization heat treatment at 1160-1200°C to obtain ingot blanks;

[0030] (B) heat-preserve the ingot billet at 1130-1170°C, and then extrude and draw to obtain a billet;

[0031] (C) Insulate the primary billet at 1020-1060°C, and then cool it to below 500°C with the furnace;

[0032] (D) heat-preserve the primary billet processed in step (C) at 960-980° C., and then extrude and elongate to obtain a secondary billet;

[0033] (E) After the secondary rod is subjected to solution heat treatment at 970-1000°C, it is then subjected to aging heat treatment at 780-820°C to obtain Ti 2 AlNb-based alloy rods.

[0034] In some embodiments of the present invention, in step (A), the temperature of homogenization heat treatment, typical but non-limiting, for example, can be 1160°C, ...

Embodiment 1

[0069] This example provides Ti 2 A method for preparing an AlNb-based alloy rod, comprising the steps of:

[0070] (A) will Ti 2 AlNb-based alloy ingots were heat-preserved at 1180°C for 38 hours, then peeled off the surface, removed the riser and the bottom. ingot billet;

[0071] (B) Brush the anti-oxidation coating (TB1200-16) with a thickness of 0.3mm on the surface of the ingot blank in order to resist 1200°C, spray glass powder with a thickness of 0.5mm, heat it at 1150°C for 3 hours, and then place it in an extrusion The press is extruded and drawn to obtain a billet, and the extrusion ratio is 4.5:1;

[0072] (C) Insulate the primary billet at 1040°C for 2 hours, and then cool it to 500°C with the furnace;

[0073] (D) peel off the bar blank after step (C) processing to The surface is coated with 1200°C anti-oxidation coating (TB1200-16) with a thickness of 0.3mm in turn, and after spraying glass powder with a thickness of 0.5mm, it is heat-preserved at 970°C...

Embodiment 2

[0077] This example provides Ti 2 A method for preparing an AlNb-based alloy rod, comprising the steps of:

[0078] (A) put Ti 2 AlNb based alloy After the ingot is heat-preserved at 1200°C for 35 hours, it is obtained by surface peeling, riser removal and bottom treatment in sequence. ingot billet;

[0079] (B) Brush the anti-oxidation coating (TB1200-16) with a thickness of 0.3mm on the surface of the ingot blank in order to resist 1200°C, spray glass powder with a thickness of 0.5mm, heat it at 1170°C for 2 hours, and then place it in an extrusion The press is extruded and drawn to obtain One billet, where the extrusion ratio is 4.5:1;

[0080] (C) Insulate the primary billet at 1060°C for 1 hour, and then cool it to 400°C with the furnace;

[0081] (D) peel off the bar blank after step (C) processing to The surface is coated with 1200°C anti-oxidation coating (TB1200-16) with a thickness of 0.3mm in turn, and after spraying glass powder with a thickness of 0.5mm...

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Abstract

The invention relates to the technical field of Ti2AlNb-based alloys, in particular to a Ti2AlNb-based alloy bar as well as a preparation method and application thereof. The preparation method comprises the following steps: (A) carrying out homogenizing heat treatment on a Ti2AlNb-based alloy cast ingot at 1160-1200 DEG C to obtain a cast ingot blank; (B) carrying out heat preservation treatment at 1130-1170 DEG C, and then extruding and drawing out to obtain a primary bar blank; (C) carrying out heat preservation treatment on the primary bar billet at 1020-1060 DEG C, then cooling the primary bar billet to 500 DEG C or below along with the furnace, and discharging the primary bar billet; (D) carrying out heat preservation treatment at 960-980 DEG C, and then extruding and drawing out to obtain a secondary bar blank; and (E) the secondary bar blank is subjected to solid solution heat treatment and aging heat treatment, and the Ti2AlNb-based alloy bar is obtained. According to the method, the tensile strength, the ductility and the structure uniformity of the Ti2AlNb-based alloy bar are improved.

Description

technical field [0001] The present invention relates to Ti 2 AlNb-based alloy technical field, especially relates to a kind of Ti 2 AlNb-based alloy bar and its preparation method and application. Background technique [0002] Ti 2 AlNb-based alloys belong to Ti-Al intermetallic compound materials, which combine Ti 3 The performance advantages of Al and TiAl have good room temperature plasticity and toughness, high specific strength, good creep resistance and oxidation resistance, and good high-temperature forming ability. High-temperature structural materials are expected to replace traditional nickel-based superalloys as important materials for aerospace engine hot-end parts, and play an important role in improving the engine's thrust-to-weight ratio and increasing the temperature resistance level. Among them, blade forgings for aviation and aerospace engines are one of its main applications. However, blades are mainly affected by centrifugal force during use, and have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/00C21D9/00C21D9/52C22C30/00
Inventor 王红卫马雄张建伟梁晓波张熹雯史晓强程云君
Owner BEIJING CISRI GAONA TECH
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