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Production method of titanium alloy seamless pipe

A production method and technology of titanium alloy, applied in the field of metallurgy, can solve the problems of low yield of hot-rolled titanium tube, complicated process of cold-rolled titanium tube, poor quality of inner and outer surfaces, etc. The effect of good mechanical properties

Inactive Publication Date: 2015-11-11
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce qualified products, but its process is complicated, the cost is high, and vacuum annealing is needed to achieve the performance required by the product
[0005] It can be seen that the existing hot-rolled titanium pipes have a low yield, and because of the existence of air-permeable layers on the inner and outer surfaces, the inner and outer surfaces have poor quality and many defects, especially inner surface defects, which are difficult to remove
The process of cold-rolling titanium tube is complicated, the cost is high, the output is low, and vacuum annealing is required to achieve the required performance

Method used

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  • Production method of titanium alloy seamless pipe
  • Production method of titanium alloy seamless pipe
  • Production method of titanium alloy seamless pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] To produce TC4 titanium alloy tubes with a specification of 114.3×7.37 (outer diameter×wall thickness, the unit is mm), the specific steps include:

[0036] a1. Processing titanium alloy round billet: processing φ95mm titanium alloy round billet by forging machine;

[0037] b1. Titanium alloy round billet heating: heat the φ95mm titanium alloy round billet in an inclined bottom furnace, wherein the heating temperature is 955°C, and the heating time is 120 minutes. Through this step, the titanium alloy round billet is heated to 950-960°C;

[0038] c1. Piercing: cross-rolling and piercing the heated round billet to form a blank tube with a specification of 98×8.5;

[0039] d1. Calibration: Calibrate the waste pipe at 860-880°C, and make it a plain pipe with a specification of 89×8.5. After sizing, use the waste heat to heat and straighten, and pickle after straightening. The components of the pickling solution It is: 4.5% hydrofluoric acid, 14% nitric acid, and the rest ...

Embodiment 2

[0052] To produce TC4 titanium alloy tubes with a specification of 114×6.35 (outer diameter×wall thickness, the unit is mm), the specific steps include:

[0053] a2. Processing titanium alloy round billet: forging machine processing φ95mm titanium alloy round billet;

[0054] b2. Titanium alloy round billet heating: heat the φ95mm titanium alloy round billet in an inclined bottom furnace, wherein the heating temperature is 950°C, and the heating time is 100 minutes. Through this step, the titanium alloy round billet is heated to 950-960°C;

[0055] c2. Piercing: cross-rolling and piercing the heated round billet to form a blank tube with a specification of 98×7.5;

[0056] d2. Calibration: Calibrate the waste pipe at 860-880°C, and make it a bare pipe with a specification of 89×7.6. After sizing, use the waste heat to heat and straighten, and pickle after straightening. The pickling liquid composition It is: 4.5% hydrofluoric acid, 14% nitric acid, and the rest is water.

[...

Embodiment 3

[0063] The production specification is 114×6.88 (outer diameter×wall thickness, the unit is mm) of TC4 titanium alloy tube, the specific method includes:

[0064] a3. Processing titanium alloy round billet: forging machine processing φ95mm titanium alloy round billet;

[0065] b3. Titanium alloy round billet heating: heat the φ95mm titanium alloy round billet in an inclined bottom furnace, wherein the heating temperature is 960°C, and the heating time is 110 minutes. Through this step, the titanium alloy round billet is heated to 950-960°C;

[0066] c3. Piercing: cross-rolling and piercing the heated round billet to form a blank tube with a specification of 98×8.0;

[0067] d3. Calibration: Calibrate the waste pipe at 860-880°C, and make it a bare pipe with a specification of 89×8.1. After sizing, use the waste heat to heat and straighten, and pickle after straightening. The pickling liquid composition It is: 4.5% hydrofluoric acid, 14% nitric acid, and the rest is water.

...

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Abstract

The invention relates to the field of metallurgy, provides a production method of a titanium alloy seamless pipe, and solves the problems of low yield and complex working procedures in a current production method of the titanium alloy seamless pipe. The method comprises the steps of: heating of a titanium alloy circular blank; perforation; sizing; medium-frequency pushing; and straightening. The production method, provided by the invention, is simple in working procedures and high in yield.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a production method of a titanium alloy seamless pipe. Background technique [0002] With the rapid development of my country's national economy and science and technology, the preparation technology and product quality of titanium alloy materials have been greatly improved, which has led to the rapid expansion of the application field of titanium alloys. In recent years, the demand for high-strength titanium alloy pipes has increased. Existing titanium alloy seamless pipes are generally produced by hot rolling or cold rolling. [0003] Patent 103128102A discloses a production method of titanium alloy oil well pipe. The production method includes: two smelting in a vacuum furnace, multiple times of forging and peeling to form a round billet, heating to 970-1030°C in an annular furnace, thermal perforation to obtain a capillary tube, and capillary tube through After descaling by high-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C22C14/00C23G1/10
Inventor 江健边华川郭元蓉邹友富杨旭黄英曾理张凯之
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM