Preparation method of titanium alloy bar of universal resetting screw seat

A technology of titanium alloy and screw seat, which is applied in the field of preparation of universal reset screw seat titanium alloy bar, can solve the problems of universal reset screw seat bar expansion, expansion, shrinkage, etc., to ensure uniformity and Consistency, reduction of residual stress, elimination of tensile stress and compressive stress

Active Publication Date: 2020-08-14
中科锐金山东钛业科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The residual stress of the above-mentioned Ti-6Al-4V alloy in the process of processing causes the problem of flaring or shrinking of the universal reset screw seat bar in the production of medical products
The technical problem to be solved by the present invention is to provide a method for preparing titanium alloy bar of universal reset screw seat, in order to solve the problem of flaring or shrinking of Ti-6Al-4V alloy bar in the production of medical products

Method used

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  • Preparation method of titanium alloy bar of universal resetting screw seat
  • Preparation method of titanium alloy bar of universal resetting screw seat
  • Preparation method of titanium alloy bar of universal resetting screw seat

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Embodiment 1

[0039] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 6.15% of Al element, 4.14% of V element, 0.17% of Fe element, 0.11% of O element, 0.013% of C element, and 0.0009% of H element %, N element 0.0092%, and the balance is Ti.

[0040] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0041] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0042] Step 2: Carry out billet forging at 1100°C, and finish forging at 950°C. The holding time is controlled at 5 hours, and the deformation per time is controlled at 60%; The temperature is 40°C above the β-transition point of the titanium alloy, kept for 30 minutes, and water quenched to room temperature.

[0043] Ste...

Embodiment 2

[0056] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 6.35% of Al element, 4.3% of V element, 0.20% of Fe element, 0.13% of O element, 0.019% of C element, and 0.0005% of H element %, N element 0.0078%, and the balance is Ti.

[0057] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0058] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0059] Step 2: Carry out blank forging at 1050°C, and finish forging at 900°C. The holding time is controlled at 2 hours, and the deformation per time is controlled at 40%; The temperature is 30°C above the β transformation point of the titanium alloy, kept for 60 minutes, and water quenched to room temperature.

[0060] S...

Embodiment 3

[0073] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 5.9% of Al element, 4.0% of V element, 0.16% of Fe element, 0.096% of O element, 0.037% of C element, and 0.001% of H element %, N element 0.0096%, and the balance is Ti.

[0074] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0075] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0076] Step 2: Carry out billet forging at 1150°C, and finish forging at 1000°C. The holding time is controlled at 6 hours, and the deformation per time is controlled at 80%; The temperature is 50°C above the β transformation point of the titanium alloy, kept for 10 minutes, and water quenched to room temperature.

[0077] ...

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Abstract

The invention belongs to the technical field of machining of medical titanium alloy materials and particularly relates to a preparation method of a titanium alloy bar of a universal resetting screw seat. The chemical ingredients of titanium alloy comprise, by mass percentage, 5.9%-6.4% of Al, 3.9%-4.4% of V, 0.15%-0.22% of Fe, 0.09%-0.13% of O, not larger than 0.05% of C, not larger than 0.005% ofH, not larger than 0.01% of N and the balance Ti. The preparation method comprises the steps that firstly, a round bar blank is obtained through the procedures of smelting, forging, and rolling; thena beta single-phase section homogenization annealing treatment process is adopted to obtain a homogeneous fine-grained acicular martensite structure, an electrifying straightening and hyperbolic straightening combined process is used for straightening, the electrifying straightening temperature is controlled to be less than 780 DEG C, and a balanced residual stress state is obtained; and finally,stress relief annealing and centerless grinding are conducted to obtain the finished bar. The preparation method of the titanium alloy bar of the universal resetting screw seat can produce a medicalTi-6Al-4V alloy bar basically free of stress, the Ti-6Al-4V alloy bar has excellent fatigue life, and a qualified raw material is provided for manufacturing of universal resetting screw seats of orthopedic medical instruments.

Description

technical field [0001] The invention belongs to the technical field of processing titanium alloy materials for medical use, and in particular relates to a method for preparing titanium alloy rods for universal reset screw seats. Background technique [0002] Titanium alloy has excellent biocompatibility, corrosion resistance, non-magnetic, non-toxic, and is widely used in the medical field. Ti-6Al-4V alloy is widely used in the production and preparation of medical products, but the titanium alloy rods and wires produced by the existing technology have large internal stress, which will be caused by the subsequent mechanical processing of the universal reset screw seat. Processing methods such as openings cause stress imbalances, causing expansion or contraction of the openings, which destroys the precision of medical products. Contents of the invention [0003] The residual stress existing in the above-mentioned Ti-6Al-4V alloy during processing causes the problem of flar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18C21D9/00C22C1/03B21J5/00B21J1/06B21D3/00B21B37/56B21B37/74B21C1/20B21C9/00B21C19/00B21B3/00A61L31/02A61L31/14
CPCA61L31/022A61L31/14B21B3/00B21B37/56B21B37/74B21C1/20B21C9/00B21C19/00B21D3/00B21J1/06B21J5/002C21D9/0075C21D2211/008C22C1/03C22C14/00C22F1/002C22F1/183
Inventor 柏春光张志强赵建杨锐
Owner 中科锐金山东钛业科技有限公司
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