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Preparation method of titanium alloy seamless pipe

A titanium alloy and seamless tube technology, applied in the field of titanium alloy processing, can solve problems such as low strength and poor surface quality, and achieve the effects of high molding quality, reduced friction, and high dimensional accuracy of products

Inactive Publication Date: 2018-02-27
宝鸡市金海源钛标准件制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing titanium alloy seamless pipes to solve the problems of low strength and poor surface quality of titanium alloy seamless pipes in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A kind of preparation method of titanium alloy seamless pipe of the present invention, specifically implement according to the following steps:

[0026] Step 1, the titanium alloy ingot is heated and forged sequentially to obtain a titanium alloy rod, wherein the heating temperature is 850-1000°C;

[0027] Step 2, heating the titanium alloy bar obtained in step 1 to 600-650° C., keeping it warm for 1-2 hours, and straightening;

[0028] Step 3, processing the titanium alloy rod processed in step 2 through holes along the length direction to obtain a titanium alloy seamless tube blank;

[0029] In step 4, the outer surface of the titanium alloy seamless tube blank obtained in step 3 is sprayed or coated with a lubricant, and then cold-pressed and heat-treated. The number of times is 3 times;

[0030] Step 5: Treat the inner wall and outer surface of the titanium alloy seamless tube blank processed in step 4. The specific process of the inner wall treatment is as follow...

Embodiment 1

[0033] Step 1, heating the titanium alloy ingot to 850°C for forging to obtain a titanium alloy rod;

[0034] Step 2, heating the titanium alloy rod obtained in step 1 to 600°C, keeping it warm for 2 hours, and straightening;

[0035] Step 3, processing the titanium alloy rod processed in step 2 through holes along the length direction to obtain a titanium alloy seamless tube blank;

[0036] Step 4, spraying or coating the outer surface of the titanium alloy seamless tube blank obtained in step 3 with a lubricant, performing 4 passes of cold rolling and 3 passes of heat treatment, the cold rolling and heat treatment being performed alternately;

[0037] Step 5: Treat the inner wall and outer surface of the titanium alloy seamless tube blank processed in step 4. The specific process of the inner wall treatment is as follows: insert the throwing rod into the tube to drive the impeller to rotate at high speed, and the titanium alloy seamless tube itself Rotate to polish, and slo...

Embodiment 2

[0040] Step 1, heating the titanium alloy ingot to 925°C for forging to obtain a titanium alloy rod;

[0041] Step 2, heating the titanium alloy rod obtained in step 1 to 625°C, keeping it warm for 1.5h, and straightening;

[0042] Step 3, processing the titanium alloy rod processed in step 2 through holes along the length direction to obtain a titanium alloy seamless tube blank;

[0043] Step 4, spraying or coating the outer surface of the titanium alloy seamless tube blank obtained in step 3 with a lubricant, performing 4 passes of cold rolling and 3 passes of heat treatment, the cold rolling and heat treatment being performed alternately;

[0044] Step 5: Treat the inner wall and outer surface of the titanium alloy seamless tube blank processed in step 4. The specific process of the inner wall treatment is as follows: insert the throwing rod into the tube to drive the impeller to rotate at high speed, and the titanium alloy seamless tube itself Rotate to polish, and slowly...

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PUM

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Abstract

The invention discloses a preparation method of a titanium alloy seamless pipe. The preparation method comprises the following specific implementation steps that 1, a titanium alloy cast ingot is sequentially heated and forged to obtain a titanium alloy bar; 2, the titanium alloy bar obtained in the step 1 is heated to be 600-650 DEG C, heat preservation is conducted for 1-2 h, and straightening is conducted; 3, a through hole is machined in the titanium alloy bar treated in the step 2 in the length direction to obtain a titanium alloy seamless pipe blank; 4, the outer surface of the titaniumalloy seamless pipe blank obtained in the step 3 is sprayed or coated with a lubricant, and then cold pressing and heat treatment are conducted; 5, the inner wall and the outer surface of the titaniumalloy seamless pipe blank treated in the step 4 are treated; and 6, the titanium alloy seamless pipe blank treated in the step 5 is subjected to pre-straightening and accurate straightening treatmentto obtain the titanium alloy seamless pipe. According to the preparation method, the production technique is simple, the size accuracy of a product is high, and the labor intensity of workers is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a preparation method of a titanium alloy seamless pipe. Background technique [0002] With the development of science and technology, titanium alloy seamless pipe has become an ideal material for key parts in the fields of aviation, aerospace, petroleum, chemical industry, and shipbuilding. [0003] At present, the methods for manufacturing titanium alloy seamless pipes include perforated tube blank rolling method, titanium or titanium alloy strip forming welding method and extrusion method. The welding method cannot be used in fluid transportation pipelines such as oil transportation because of its weld seam, and its application is limited; the inner and outer surfaces of the titanium alloy pipe prepared by the extrusion method are of poor quality, and the production cost is high; the perforated tube billet rolling method In the process of preparin...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 许成
Owner 宝鸡市金海源钛标准件制品有限公司