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Preparation method of high-strength titanium alloy cold-rolled pipe

A titanium alloy pipe and titanium alloy technology, applied in the field of preparation of high-strength titanium alloy cold-rolled pipes, can solve the problems of large deformation resistance at room temperature, significant work hardening, and easy cracking

Pending Publication Date: 2022-07-05
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing high-strength titanium alloys have problems such as large deformation resistance at room temperature, significant work hardening, and easy cracking due to cold deformation.
Therefore, in the preparation process of high-strength titanium alloy pipes, the cold rolling process cannot be used for production, and only the hot continuous rolling process can be used for production. The dimensional accuracy of the pipes prepared by the hot continuous rolling process is low

Method used

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  • Preparation method of high-strength titanium alloy cold-rolled pipe
  • Preparation method of high-strength titanium alloy cold-rolled pipe
  • Preparation method of high-strength titanium alloy cold-rolled pipe

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preparation example Construction

[0032] The invention provides a preparation method of a high-strength titanium alloy cold-rolled pipe, comprising the following steps:

[0033] The titanium alloy ingot is heated in the β-phase region, and then forged or extruded in sequence to obtain a titanium alloy billet; the forging or extrusion firing times are independently ≥1 firing time;

[0034] The titanium alloy billet is heated in the β-phase region, followed by skew rolling and piercing, water cooling, first heat treatment and straightening, to obtain a titanium alloy billet 1;

[0035] The titanium alloy tube blank 1 is heated in the two-phase region, then extruded or hot rolled, and then subjected to a second heat treatment and straightening to obtain a titanium alloy tube blank 2;

[0036] Perform inner and outer surface treatment on the titanium alloy tube blank 2 to obtain a titanium alloy tube blank 3;

[0037] Perform ≥ 1 pass of cold rolling on the titanium alloy tube blank 3, and perform post-treatment ...

Embodiment 1

[0052] Preparation of TA15 titanium alloy pipe (specification: Φ60.3 (outer diameter) × 6mm (wall thickness)):

[0053] The TA15(T β =995℃) The titanium alloy ingot is heated in the β phase region, and forged for 3 times on a free forging machine. The temperature of each heating is 1170℃, 1100℃ and 1050℃, respectively, to obtain a Φ170mm billet. After peeling the titanium alloy bar blank, a titanium alloy light bar of Φ160mm is obtained. After coating the surface with glass powder lubricant, it is heated at 1050 ℃, and the holding time is 130-250min. The cross-rolling and perforation are carried out, and the perforation is Φ180×18mm, and then online Water cooling is performed, and the water-cooled tube blank is subjected to the first heat treatment, that is, in a resistance furnace, heated to 900° C. in an atmospheric environment, kept for 120 minutes, air-cooled after the heat preservation, and then straightened to obtain a titanium alloy tube blank 1. After that, glass powd...

Embodiment 2

[0057] Preparation of TA18CF titanium alloy pipe (specification: Φ73 (outer diameter) × 6mm (wall thickness)):

[0058] The TA18CF(T β= 890°C) titanium alloy ingot is heated in the β phase region, and forged for 2 times on a free forging machine. The temperature of each heating is 1150°C and 1070°C, respectively, to obtain a Φ210mm billet. After peeling the titanium alloy bar blank, a titanium alloy light bar with a diameter of Φ200mm is obtained. After coating the surface with a glass powder lubricant, it is heated at 920 ° C, and the holding time is 160-280min. Water-cooling is performed, and the water-cooled tube blank is subjected to the first heat treatment, that is, in a resistance furnace, heated to 750° C. in an atmospheric environment, kept for 120 minutes, air-cooled after the heat preservation, and then straightened to obtain a titanium alloy tube blank 1. After that, glass powder lubricant is coated on the inner and outer surfaces of the titanium alloy tube blank ...

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Abstract

The invention relates to the technical field of metal processing, and provides a preparation method of a high-strength titanium alloy cold-rolled pipe. According to the method, a titanium alloy cast ingot is subjected to precision forging or extrusion in a beta-phase region, the room-temperature tensile strength of titanium alloy forming the titanium alloy cast ingot is larger than or equal to 700 MPa, a bar blank is obtained, then the bar blank is subjected to cross piercing in the beta-phase region and online water cooling, a pipe blank 1 is obtained, then the pipe blank 1 is subjected to extrusion or hot rolling in a two-phase region, and a pipe blank 2 is obtained. And the pipe blank 2 is subjected to cold rolling, surface treatment and heat treatment, and the high-strength titanium alloy pipe is obtained. According to the method, the titanium alloy is treated in the beta-phase region and the two-phase region, the cold machining performance of the titanium alloy is improved, the titanium alloy can be prepared into the pipe through cold rolling, and the problem that the size precision is poor due to a hot continuous rolling method is solved.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a preparation method of a high-strength titanium alloy cold-rolled pipe. Background technique [0002] At present, the titanium alloy materials suitable for cold rolling in the national standard and the American standard are TA9, TA10, TA16, TA18, TA21, TA22, TC1, TC2, etc. These alloys have good cold working properties, so the prepared cold rolled pieces have high dimensional accuracy , the surface quality is good, but because the tensile strength of the above materials is between 400 and 700MPa, the strength of the prepared cold-rolled seamless pipe can no longer meet the needs of the existing market. [0003] In order to meet the needs of the existing market, high-strength titanium alloy seamless pipes have begun to enter people's field of vision. High-strength titanium alloy seamless pipes usually refer to seamless pipes prepared from titanium alloys with a tensile ...

Claims

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Application Information

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IPC IPC(8): B21C37/06
CPCB21C37/06
Inventor 席锦会葛鹏侯鹏刘姣刘宇亢宁宁
Owner WESTERN METAL MATERIAL