TA23 alloy plate with high impact toughness and high plasticity and preparation and application
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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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[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
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[0035] Example 1
[0036] (1) Ingot smelting: zero-grade titanium sponge, zirconium sponge, aluminum beans and pure iron are selected for ingredients and pressed into electrode blocks. After three vacuum consumable arc furnace smelting, TA23 alloy ingots are obtained, and the phase transition point is measured by metallographic method. 945℃;
[0037] (2) Slab forging: forging the TA23 alloy ingot obtained in step (1), wherein the forging temperature of the first-fire billet is 1050° C. (T β +105℃), after two piers and two pulls, the total deformation amount is 70%, and the final forging temperature is 865℃. Temperature 920℃(T β -25°C), also upsetting twice, the total deformation is 73%, the final forging temperature is 812°C, and then after shaping and milling, a square slab with a specification of 150mm for rolling is obtained, and the slab structure is equiaxed α +Intergranular beta, the slab meets the GB / T5193-2007 ultrasonic flaw detection grade A standard;
[0038] (3...
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[0045] Example 2
[0046] (1) Ingot smelting: zero-grade titanium sponge, zirconium sponge, aluminum beans and pure iron are selected for ingredients and pressed into electrode blocks. After three vacuum consumable arc furnace smelting, TA23 alloy ingots are obtained, and the phase transition point is measured by metallographic method. 950℃;
[0047] (2) Slab forging: forging the TA23 alloy ingot obtained in step (1), wherein, the forging temperature of one-fire billeting is 1080°C (T β +130°C), after two piers and two pulls, the total deformation is 78%, the final forging temperature is 852°C, and the coarse as-cast structure is fully broken after forging in one fire; Temperature 930℃(T β -20°C), also upsetting twice, the total deformation is 75%, the final forging temperature is 803°C, and then after shaping and milling, a square slab with a specification of 120mm for rolling is obtained, and the slab structure is equiaxed α +Intergranular beta, the slab meets the GB / T5193-...
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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...
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