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Preparation method of TA5-A titanium alloy medium-thickness plate

A TA5-A, titanium alloy technology, applied in the direction of metal rolling, metal processing equipment, etc., can solve problems that do not involve lateral results

Active Publication Date: 2021-09-07
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on this, the research and industrial production on TA5-A mostly take the longitudinal index as the consideration standard, but few research and industrial production research and consider the horizontal and vertical directions at the same time. Research" and "The Influence of Secondary Rolling Parameters and Annealing Heat Treatment on the Mechanical Properties of TA5-A Titanium Alloy Hot-Rolled Sheets" respectively studied the effects of process parameters such as oxygen content and deformation on the longitudinal properties of the sheet, although according to The TA5-A sheet prepared with the optimal parameters in the literature showed good longitudinal properties, but the transverse results were not involved

Method used

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  • Preparation method of TA5-A titanium alloy medium-thickness plate
  • Preparation method of TA5-A titanium alloy medium-thickness plate
  • Preparation method of TA5-A titanium alloy medium-thickness plate

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preparation example Construction

[0022] A preparation method of TA5-A titanium alloy plate, comprising the following preparation steps:

[0023] Step 1. Ingot smelting: Sponge titanium, aluminum beans, and aluminum-boron alloy powder are selected for batching and pressed into electrode blocks. The aluminum content of aluminum beans is ≥99.7%, and they are smelted into Ti-4Al- 0.005B ingot, cut off the riser of the ingot and peel off the skin;

[0024] Step 2, slab forging: the temperature of forging the slab in the first fire is T β +(50~120)℃,T β +(50~120)℃ means 50~120℃ above the phase transition point temperature, after at least two upsetting and drawing treatments, the total deformation is 60~80%, the final forging temperature is ≥850℃, and the first-fire blank is repaired After grinding and sawing, carry out secondary fire forging, the temperature of the secondary fire forging is T β +(20~60)℃, also after at least two times of upsetting, the total deformation is 40~80%, the final forging temperature i...

Embodiment 1

[0035] Step 1. Ingot smelting: select zero-grade sponge titanium, high-purity aluminum beans (99.8%) and aluminum-boron alloy powder for batching and pressing to form electrode blocks, and smelt Ti-4Al-0.005B through three vacuum consumable electric arc furnaces Cast ingot, the phase transition point measured by metallographic method is 1000℃.

[0036]Step 2. Slab forging: the first-fire billet forging temperature is at the phase transition point of 1100°C, after two times of upsetting and drawing, the total deformation is 75%, and the final forging temperature is 892°C; Fire forging, the temperature of the second fire forging is 1050℃, the same two times of upsetting, the total deformation is 68%, and the final forging temperature is 833℃; Two upsetting and one pulling, the total deformation is 72%, the final forging temperature is 788°C, and then it is shaped and milled to prepare a 130mm thick square slab for rolling. The slab structure is equiaxed α + intergranular β.

[...

Embodiment 2

[0044] Step 1. Ingot smelting: select zero-grade sponge titanium, high-purity aluminum beans (99.8%) and aluminum-boron alloy powder for batching and pressing to form electrode blocks, and smelt Ti-4Al-0.005B through three vacuum consumable electric arc furnaces Ingot casting, the phase transition point measured by metallographic method is 995°C.

[0045] Step 2. Slab forging: the first-fire billet forging temperature is at the phase transition point of 1100°C, after two times of upsetting and drawing, the total deformation is 78%, and the final forging temperature is 885°C; Fire forging, the temperature of the second fire forging is 1050°C, the same two times of upsetting, the total deformation is 63%, the final forging temperature is 843°C; Two upsetting and one pulling, the total deformation is 75%, the final forging temperature is 768°C, and then it is shaped and milled to prepare a 150mm thick square slab for rolling. The slab structure is equiaxed α + intergranular β.

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Abstract

The invention provides a preparation method of a TA5-A titanium alloy medium-thickness plate. The preparation method of the TA5-A titanium alloy medium-thickness plate comprises the steps of cast ingot smelting, plate blank forging, first-fire rolling, intermediate coping, second-fire finished product rolling, heat treatment, surface treatment and sand blasting pickling and coping, and finally the TA5-A alloy plate with the transverse and longitudinal tensile strength Rm being greater than or equal to 726 Mpa, the yield strength Rp0.2 being greater than or equal to 628 Mpa, the elongation A being greater than or equal to 15%, the room temperature impact akv being greater than or equal to 100 J / cm<2> and the cold bending diameter D being equal to 5T, free of cracks when the bending angle alpha is equal to 100 degrees, and has excellent comprehensive performance is obtained, and the safety and reliability of weapons such as submarines and underwater weapons are improved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a preparation method of a TA5-A titanium alloy medium-thick plate. Background technique [0002] TA5-A alloy is a special-purpose medium-strength titanium alloy developed on the basis of ordinary TA5 grades. The nominal composition is Ti-4Al-0.005B series full-alpha titanium alloy. It is mainly used in seawater resistant conditions such as submarines, underwater weapons, and ships. Bolts, stress-bearing components and pressure-resistant shells under it. Titanium has a close-packed hexagonal structure, and it is easy to form basal surface texture and transverse texture during rolling, resulting in obvious differences in transverse and longitudinal mechanical properties, resulting in anisotropy in the properties of post-processed products, which undoubtedly affects the safety and security of finished equipment. Reliability is a disadvantage. Accord...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21B1/38C22B9/20C21D1/26C22F1/18C21D8/02
CPCB21J5/002B21B1/38C22B9/20C21D1/26C22F1/183C21D8/0221C21D8/0226C21D8/0247B21B2001/386
Inventor 郝晓博张强温方明李渤渤刘茵琪
Owner LUOYANG SUNRUI TI PRECISION CASTING