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Short-process and low-cost TC4 seamless pipe preparation method

A seamless pipe, low-cost technology, applied in the direction of metal processing equipment, etc., can solve the problems of single specifications of billets and perforated pipes, low strength of finished pipes, and unmentioned microstructure, etc., to achieve good surface quality and low cost , the effect of short process

Pending Publication Date: 2022-05-06
宁夏中色金航钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the invention written this time, the billet and perforated tube blank required by this invention have a single specification, a vacuum heating furnace is used and an anti-oxidation coating needs to be applied, the production cost is higher, and the strength of the finished pipe produced is lower, Organizational form not mentioned

Method used

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  • Short-process and low-cost TC4 seamless pipe preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Implementation example 1: TC4 titanium alloy φ30×3 mm pipe

[0022] (1) Ingot preparation

[0023] Sponge titanium and aluminum vanadium alloy according to the following ratio: Al: 6.0%; V: 4%; C: 0.06%; N: 0.02%; H: 0.001; O: 0.13%; Fe: 0.16%; The block combination welds the electrodes once, and then conducts 2 times of vacuum consumable electric arc furnace melting to produce φ400mm.

[0024] (2) Bar blank preparation

[0025] Through 5 times of forging, different forging temperatures and deformations are selected to forge into a φ75mm billet, and then the machine is added and peeled to control the amount of unilateral machine addition to 2mm, the flaw detection level reaches A level, and the structure is uniform; after sawing, flat head The rear length is controlled at 600-1200mm.

[0026] (3) Tube blank preparation: It is produced by cross-rolling piercing machine.

[0027] Before heating, the TC4 light rod is pre-coated with anti-oxidation lubricating paint. Fi...

Embodiment 2

[0035] Implementation example 2: TC4 titanium alloy φ76×8 mm pipe

[0036] (1) Ingot preparation

[0037] Sponge titanium and aluminum vanadium alloy according to the following ratio: Al: 6.3%; V: 4.2%; C: 0.06%; N: 0.02%; H: 0.001; O: 0.16%; Fe: 0.20%; The block combination welds the electrode once, and then carries out 2 times of vacuum consumable electric arc furnace melting to produce φ600mm.

[0038] (2) Bar blank preparation

[0039] Through 7 times of forging, different forging temperatures and deformations are selected to forge into a φ100mm billet, and then the machine is added and peeled to control the unilateral machine addition to 3.5mm, the flaw detection level reaches A level, and the structure is uniform; After sawing, The length after the flat head is controlled at 600-1200mm.

[0040] (3) Tube blank preparation: It is produced by cross-rolling piercing machine.

[0041] Before heating, the TC4 light rod is pre-coated with anti-oxidation lubricating paint. ...

Embodiment 3

[0049] Implementation example 3: TC4 titanium alloy φ50×7.5 mm pipe

[0050] (1) Ingot preparation

[0051] Sponge titanium and aluminum vanadium alloy according to the following ratio: Al: 6.6%; V: 4.4%; C: 0.06%; N: 0.02%; H: 0.001; O: 0.20%; Fe: 0.28%; The block combination is welded once to the electrode, and then smelted in a vacuum consumable electric arc furnace for 3 times to produce a φ700mm.

[0052] (2) Bar blank preparation

[0053] Through 10 times of forging, different forging temperatures and deformations are selected to forge into a φ120mm billet, and then the machine is added and peeled to control the amount of unilateral machine addition to 4mm. The flaw detection level reaches A1 level, and the structure is uniform; after sawing, flat head The rear length is controlled at 600-1200mm.

[0054] (3) Tube blank preparation: It is produced by cross-rolling piercing machine.

[0055] Before heating, the TC4 light rod is pre-coated with anti-oxidation lubricati...

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Abstract

A short-process and low-cost TC4 seamless tubular product preparation method comprises the steps of (1) cast ingot preparation, (2) bar billet preparation, (3) tube billet preparation, (4) tube billet hot rolling and (5) finished tubular product heat treatment and straightening, powder compression molding is adopted, then the cast ingot is prepared through smelting, the process flow is simple, all components in the bar billet formed after smelting are uniform and consistent, and the production efficiency is high. The TC4 alloy pipe prepared through the technology is short in process, low in cost, good in surface quality, high in size precision and excellent in strength and plasticity, and can meet the application of the TC4 alloy pipe in the high-end field.

Description

technical field [0001] The invention relates to the technical field of titanium alloy pipes, in particular to a short-flow, low-cost TC4 seamless pipe preparation method. Background technique [0002] TC4 alloy has low density, high specific strength, and good corrosion resistance. It is widely used in various fields such as aerospace, petrochemical, marine, sports, medicine, and military industries. The development of seamless pipes alone lags behind. Due to the high deformation resistance, serious work hardening and easy cracking of TC4 alloy, the processing of its seamless pipe is very difficult. At present, seamless pipes are mainly prepared by rod drilling, cold rolling, hot extrusion or skew rolling perforation in the domestic and foreign markets. The structure and properties of pipes prepared by hot extrusion or rod drilling can meet the standard requirements. However, the yield is often very low due to the large loss of machining. The cold rolling process is easy t...

Claims

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Application Information

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IPC IPC(8): B21C37/06B21J5/00
CPCB21C37/06B21J5/002
Inventor 陈胜川朱宝辉沈立华孙黎旭李永林
Owner 宁夏中色金航钛业有限公司