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TA23 alloy plate with high impact toughness and high plasticity and preparation and application

A technology of alloy sheet and high plasticity, which is applied in the field of TA23 alloy sheet and its preparation and application, to achieve the effects of structure refinement, high safety, and novel process route

Active Publication Date: 2019-03-22
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] TA23 is a Ti-2.5Al-2Zr-1Fe series near-alpha titanium alloy. The plate produced by it has medium strength and high plasticity. Its yield strength is ≥590MPa, tensile strength is ≥700MPa, elongation is ≥18%. The ratio is about 80%, and the same strength titanium alloy has more excellent plasticity, for example, the tensile strength of TA5 and TA7 alloy plates are ≥685MPa and ≥735MPa respectively, but the elongation is only ≥12%

Method used

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  • TA23 alloy plate with high impact toughness and high plasticity and preparation and application

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Ingot smelting: Select zero-grade sponge titanium, sponge zirconium, aluminum beans and pure iron as ingredients and press them into electrode blocks. After three times of vacuum consumable electric arc furnace melting, TA23 alloy ingots are obtained. The phase transition point is measured by metallographic method 945°C;

[0037] (2) Slab forging: the TA23 alloy ingot obtained in step (1) is forged, wherein the first-fire billet forging temperature is 1050°C (T β +105°C), through two piers and two pullouts, the total deformation is 70%, the final forging temperature is 865°C, the coarse cast structure is fully broken after the first fire blank forging; the second fire product forging is carried out after the first fire blank forging, forging Temperature 920°C (T β -25°C), after two times of upsetting, the total deformation is 73%, the final forging temperature is 812°C, and then after shaping and face milling, a square slab for rolling with a specification of 150mm...

Embodiment 2

[0046] (1) Ingot smelting: Select zero-grade sponge titanium, sponge zirconium, aluminum beans and pure iron as ingredients and press them into electrode blocks. After three times of vacuum consumable electric arc furnace melting, TA23 alloy ingots are obtained. The phase transition point is measured by metallographic method 950°C;

[0047] (2) Slab forging: the TA23 alloy ingot obtained in step (1) is forged, wherein, the first-fire billet forging temperature is 1080° C. (T β +130℃), through two piers and two pullouts, the total deformation is 78%, and the final forging temperature is 852℃. After the first fire blank forging, the coarse cast structure is fully broken; Temperature 930°C (T β -20°C), also after two times of upsetting, the total deformation is 75%, the final forging temperature is 803°C, and then through shaping and face milling, a square slab for rolling with a specification of 120mm is obtained, and the slab structure is equiaxed α + Intergranular β, the sla...

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Abstract

The invention belongs to the field of non-ferrous metal processing, and specifically relates to a TA23 alloy plate with high impact toughness and high plasticity and preparation and an application. According to the TA23 alloy plate, a whole process design concept is adopted, and key processes of cast ingot components, forging processes, rolling and heat treatment and the like are controlled in alldirections, so that the TA23 alloy plate with high impact toughness and high plasticity is prepared. The tensile strength Rm of the TA23 alloy plate is greater than or equal to 740 Mpa, the yield strength Rp0.2 is greater than or equal to 630 Mpa, the elongation A is greater than or equal to 19%, the room temperature impact KV2 is greater than or equal to 80 J, the low temperature impact at -40 DEG C is greater than or equal to 30 J, the overall performance is good, wherein the room temperature impact toughness is increased by more than 100%, the low temperature impact toughness is increasedby more than 190%, the elongation is increased by more than 3%, all indexes meet the customer standard, enough performance allowance is left, the safety factor of the product is greatly increased, andthe TA23 alloy plate is used for manufacturing ship structural parts and has the advantages of high impact resistant capability and high safety.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and in particular relates to a TA23 alloy plate with high impact toughness and high plasticity, as well as its preparation and application. Background technique [0002] TA23 is a Ti-2.5Al-2Zr-1Fe series near-alpha titanium alloy. The plate produced by it has medium strength and high plasticity. Its yield strength is ≥590MPa, tensile strength is ≥700MPa, elongation is ≥18%. The ratio is about 80%, and the same strength titanium alloy has more excellent plasticity, for example, the tensile strength of TA5 and TA7 alloy plates are ≥685MPa and ≥735MPa respectively, but the elongation is only ≥12%. Therefore, TA23 titanium alloy plate has excellent cold and hot forming properties, and also has good weldability, seawater corrosion resistance and sound transmission performance. It is very suitable for forming and building large titanium alloy structural parts. It is an ideal titanium alloy fo...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18
CPCC22C1/02C22C14/00C22F1/183
Inventor 李渤渤郝晓博张强刘茵琪裴腾毛人杰
Owner LUOYANG SUNRUI TI PRECISION CASTING
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