Machining method for thin-walled titanium pipe

A processing method and technology of titanium tubes, applied in coating and other directions, can solve the problems of high cold deformation resistance, poor surface quality, and uneven wall thickness of titanium alloys, and achieve the effects of uniform tissue arrangement, good surface quality, and sufficient annealing

Inactive Publication Date: 2018-10-12
SUZHOU JINXIANG TITANIUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, titanium alloys have high cold deformation resistance, severe springback, low plasticity, and poor cold workability. At present, the processing method of titanium and titanium alloy seamless pipes is mainly cold rolling, and the tube billet-cold rolling method is mostly suitable for medium wall Thick and small-diameter titanium pipes are formed, but it is not suitable for thin-walled pipes, and there are problems such as poor surface quality and uneven wall thickness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A processing method for a thin-walled titanium tube, comprising the following steps:

[0021] (1) Making blanks: the raw materials are prepared by forging and then extruding to obtain titanium tube blanks; the raw materials are C: 1-2%, S: 0.3-0.6%, Si: 0.5-1.2%, Zr: 0.8% , Sn: 1.2%, Pt: 0.4%, the balance is Ti and unavoidable impurities.

[0022] (2) Rolling: use a cold press to roll the titanium tube blank for multiple passes, and perform degreasing treatment and annealing treatment after each rolling. The annealing treatment is specifically: under vacuum conditions, the titanium tube blank Rapidly heat up to 280-320°C, keep warm for 10-15min; slowly heat up to 650-750°C, keep warm for 30-60min; then quickly cool to 280-320°C, keep warm for 10-15min; cool to room temperature;

[0023] (3) Surface treatment: Soak the rolled titanium tube billet in the surface treatment solution for 10-15 minutes, and dry it to obtain a thin-walled titanium tube. The surface treatment...

Embodiment 2

[0028] A processing method for a thin-walled titanium tube, comprising the following steps:

[0029] (1) Making blanks: the raw materials are prepared by forging and then extruding to obtain titanium tube blanks; the raw materials are C: 1-2%, S: 0.3-0.6%, Si: 0.5-1.2%, Zr: 0.8% , Sn: 1.2%, Pt: 0.4%, the balance is Ti and unavoidable impurities.

[0030] (2) Rolling: use a cold press to roll the titanium tube blank for multiple passes, and perform degreasing treatment and annealing treatment after each rolling. The annealing treatment is specifically: under vacuum conditions, the titanium tube blank Rapidly heat up to 280-320°C, keep warm for 10-15min; slowly heat up to 650-750°C, keep warm for 30-60min; then quickly cool to 280-320°C, keep warm for 10-15min; cool to room temperature;

[0031] (3) Surface treatment: Soak the rolled titanium tube billet in the surface treatment solution for 10-15 minutes, and dry it to obtain a thin-walled titanium tube. The surface treatment...

Embodiment 3

[0035] A processing method for a thin-walled titanium tube, comprising the following steps:

[0036] (1) Making blanks: the raw materials are prepared by forging and then extruding to obtain titanium tube blanks; the raw materials are C: 1-2%, S: 0.3-0.6%, Si: 0.5-1.2%, Zr: 0.8% , Sn: 1.2%, Pt: 0.4%, the balance is Ti and unavoidable impurities.

[0037] (2) Rolling: use a cold press to roll the titanium tube blank for multiple passes, and perform degreasing treatment and annealing treatment after each rolling. The annealing treatment is specifically: under vacuum conditions, the titanium tube blank Rapidly heat up to 280-320°C, keep warm for 10-15min; slowly heat up to 650-750°C, keep warm for 30-60min; then quickly cool to 280-320°C, keep warm for 10-15min; cool to room temperature;

[0038] (3) Surface treatment: Soak the rolled titanium tube billet in the surface treatment solution for 10-15 minutes, and dry it to obtain a thin-walled titanium tube. The surface treatment...

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Abstract

The invention discloses a machining method for a thin-walled titanium pipe. The method comprises the following several steps that (1), a blank is manufactured; (2), rolling is carried out, wherein multi-pass rolling is carried out on the titanium pipe blank by adopting a cold press, oil removal treatment and annealing treatment are carried out after rolling of each time, and the annealing treatment specifically comprises the following steps that under a vacuum condition, the titanium pipe blank is rapidly heated to 280-320 DEG C, the temperature is kept for 10-15 minutes, then the titanium pipe blank is slowly heated to 650-750 DEG C, the temperature is kept for 30-60 minutes, then the titanium pipe blank is rapidly cooled to 280-320 DEG C, the temperature is kept for 10-15 minutes, and then the titanium pipe blank is cooled to the normal temperature; and (3), surface treatment is carried out. According to the machining method, multi-pass rolling is carried out on the titanium pipe blank through the cold press, moreover, the oil removal treatment and the annealing treatment are carried out after rolling of each time, through the stepped annealing treatment mode, the titanium pipe blank is sufficiently annealed, grains are refined, and the structure arrangement is uniform, so that a final titanium pipe finished product is uniform in wall thickness, and good in surface quality.

Description

technical field [0001] The invention relates to a processing method for a thin-walled titanium tube, belonging to the technical field of titanium tube processing. Background technique [0002] Titanium and its alloys are widely used in aerospace, chemical industry, nuclear industry and Weapons etc. [0003] However, titanium alloys have high cold deformation resistance, severe springback, low plasticity, and poor cold workability. At present, the processing method of titanium and titanium alloy seamless pipes is mainly cold rolling, and the tube billet-cold rolling method is mostly suitable for medium wall The forming of thick and small-diameter titanium pipes is not suitable for thin-walled pipes, and there are problems such as poor surface quality and uneven wall thickness. Contents of the invention [0004] In order to overcome the deficiencies of the prior art, the invention provides a processing method for a thin-walled titanium tube. [0005] The present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18C09D1/00C09D7/61C09D7/63
Inventor 范祥荣王巍
Owner SUZHOU JINXIANG TITANIUM EQUIP
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