CN103909111A - Titanium alloy seamless tube and production method thereof - Google Patents

Titanium alloy seamless tube and production method thereof Download PDF

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Publication number
CN103909111A
CN103909111A CN201410119389.1A CN201410119389A CN103909111A CN 103909111 A CN103909111 A CN 103909111A CN 201410119389 A CN201410119389 A CN 201410119389A CN 103909111 A CN103909111 A CN 103909111A
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CN
China
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titanium alloy
alloy seamless
production
seamless pipe
hollow
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CN201410119389.1A
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Chinese (zh)
Inventor
江健
边华川
郭元蓉
黄英
邹友富
李银
杨旭
李波
曾理
程力
冯庆
张凯之
刘波
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攀钢集团成都钢钒有限公司
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Priority to CN201410119389.1A priority Critical patent/CN103909111A/en
Publication of CN103909111A publication Critical patent/CN103909111A/en

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Abstract

The invention provides a titanium alloy seamless tube and a production method of the titanium alloy seamless tube. The method comprises the following steps: smelting to form a titanium alloy solution, and preparing a circular tube blank; heating the circular tube blank to be 1100-1200 DEG C; obliquely rolling and perforating to obtain a hollow billet; continuously rolling the hollow billet to form a pierced billet; heating the pierced billet to be 860-900 DEG C by using a heating furnace, carrying out stretch reduction at a deformation amount of 30-65% and cooling by air to obtain a titanium alloy seamless tube with an isometric crystal structure. The titanium alloy solution comprises the following components in percentage by weight: 5.6-6.7% of Al, 3.6-4.4% of V, less than or equal to 0.28% of Fe, less than or equal to 0.07% of C, less than or equal to 0.18% of O, less than or equal to 0.01% of N, less than or equal to 0.01% of H and the balance of Ti. Through the production method, the titanium alloy seamless tube with yield strength being greater than 880 MPa, tensile strength being greater than 940 MPa and elongation percentage being greater than 15% can be obtained under the condition of cancelling the normal heat treatment process; meanwhile, the titanium alloy seamless tube is short in production cycle, low in cost and high in production efficiency.

Description

A kind of titanium alloy seamless pipe and production method thereof

Technical field

The present invention relates to titanium alloy seamless pipe technical field, specifically, relate to a kind of titanium alloy seamless pipe and production method thereof.

Background technology

Conventionally, titanium alloy seamless pipe can adopt after circular pipe blank hot piercing the cold rolling or hot rolling of multi-pass to be shaped, then after heat-treating to meet the requirements of performance.For cold rolling, limited because of cold rolling every time deflection, make finished product and often need the cold rolling of multi-pass.Every time cold rolling production process is generally: inspection → crop, cut-out → annealing heat treatment → bundling → pickling → cleaning → flushing → neutralization → oven dry → inspection → reconditioning → lubricated → cold rolling.Visible, there is manufacturing procedure complexity in existing technique, has that cost is high, the deficiency such as yield poorly.

Summary of the invention

The object of the invention is to solve at least one in prior art above shortcomings.

For example, one of object of the present invention is to provide a kind of titanium alloy seamless pipe with excellent mechanical performances, and a kind of operation and lower-cost titanium alloy seamless pipe production method with simplification.

An aspect of of the present present invention provides a kind of production method of titanium alloy seamless pipe.Described production method comprises the following steps: smelt forming component by weight percentage for the titanium alloy of Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% and surplus Ti, titanium alloy is made to circular pipe blank; Heating circular pipe blank, so that circular pipe blank temperature is 1100~1200 DEG C;

Circular pipe blank is carried out to roll piercing to obtain hollow billet, hollow billet is carried out to tandem rolling to form hollow forging, hollow forging air cooling, to room temperature, fully changes the Widmannstatten structure of mandrel mill-made shell.With reheating furnace heating hollow forging to 860~900 DEG C, carry out stretch reducing, only subtract external diameter, do not subtract wall thickness, stretch reducing deflection is 15~44%, air cooling obtains having the titanium alloy seamless pipe of basket tissue.

Another aspect of the present invention provides a kind of titanium alloy seamless pipe.Described titanium alloy seamless pipe is made by production method as above, and its composition is Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% and surplus Ti by weight percentage.

Compared with prior art, beneficial effect of the present invention comprises: after tandem rolling, titanium alloy tube air cooling is to room temperature, by opening the combination that subtracts deflection and deformation temperature, can be in the case of cancelling conventional heat treatment step, acquisition has the titanium alloy seamless pipe of excellent mechanical performances (for example, yield strength be greater than 880MPa, tensile strength are greater than 940MPa, percentage elongation is greater than 15%); And simplified operation and production cycle, reduce cost, improve production efficiency.

Brief description of the drawings

Fig. 1 shows according to the metallurgical structure figure of the titanium alloy seamless pipe of one exemplary embodiment of the present invention.

Detailed description of the invention

Hereinafter, describe titanium alloy seamless pipe of the present invention and production method thereof in detail in connection with exemplary embodiment.

Titanium alloy seamless pipe production method according to an aspect of the present invention comprises the following steps: smelting forming component is Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% by weight percentage, and the titanium alloy of surplus Ti, titanium alloy is made to circular pipe blank; Heating circular pipe blank, so that circular pipe blank temperature is 1100~1200 DEG C; Circular pipe blank is carried out to roll piercing to obtain hollow billet; Hollow billet is carried out to tandem rolling to form hollow forging; Hollow forging air cooling is to room temperature, with reheating furnace heating hollow forging to 860~900 DEG C, carries out stretch reducing, and stretch reducing deflection is 15~44%, and air cooling obtains having the titanium alloy seamless pipe of basket tissue.

In one exemplary embodiment of the present invention, the step of heating circular pipe blank can make circular pipe blank temperature be preferably 1130~1180 DEG C.In addition,, by the step of reheating furnace heating hollow forging, preferably hollow forging is heated to 875~890 DEG C.In addition, the deflection of stretch reducing is preferably 22%~40%.

Titanium alloy seamless pipe is according to a further aspect of the invention made by production method as above, and its composition is Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% and surplus Ti by weight percentage.

Describe exemplary embodiment of the present invention and effect thereof in detail below in conjunction with concrete example 1 to 3.

The technological process of production that example 1 to 3 adopts can be sketched and be: forge circular pipe blank → annular furnace heating → roll piercing → tri-roller mandrel rolling mill tube rolling → air cooling to room temperature → reheating furnace heating → stretch reducing → air cooling to room temperature; In addition, the operation such as follow-up also can align → flaw detection, hydraulic pressure, inspection, packaging.Wherein, perforating head adopts 20CrNi3WCoMo steel alloy.

Example 1

This example production specification is the titanium alloy seamless pipe of Φ 110 × 14mm.

The titanium alloy (wherein, Ti be surplus) of melting forming component as shown in example in table 11 forges makes Φ 200 circular pipe blanks.Heat circular pipe blank with rotary heating furnace, the furnace temperature that rotary heating furnace is set is 1105 DEG C, and temperature retention time is 60min, so that circular pipe blank temperature is 1105 ± 5 DEG C.Subsequently, circular pipe blank is carried out to roll piercing, to obtain hollow billet, hollow billet is carried out to tandem rolling to form 180 × 14 hollow forgings, hollow forging air cooling is to room temperature.Hollow forging enters reheating furnace, heating hollow forging to 880 ± 5 DEG C, and temperature retention time is 20min.Go out after reheating furnace, hollow forging carries out stretch reducing through two roller stretch-reducing mills, and stretch reducing deflection is 39%, obtains the titanium alloy seamless pipe of Φ 110 × 14mm.Subsequently, on cold bed by its air cooling to room temperature.As shown in Figure 1, it has basket tissue to the metallurgical structure figure of the titanium alloy seamless pipe of this example gained.The multiplication factor of Fig. 1 is 500 times.

The mechanical property parameters of the titanium alloy seamless pipe that after testing, this example makes is as shown in table 2.

Example 2

This example production specification is the titanium alloy seamless pipe of Φ 89 × 7mm.

The titanium alloy (wherein, Ti be surplus) of melting forming component as shown in example in table 12, ingot casting, forges and makes Φ 160 circular pipe blanks.Heat circular pipe blank with rotary heating furnace, the furnace temperature that rotary heating furnace is set is 1110 DEG C, and temperature retention time is 50min, so that circular pipe blank temperature is 1105 ± 5 DEG C.Subsequently, circular pipe blank is carried out to roll piercing, to obtain hollow billet, hollow billet is carried out to tandem rolling to form 140 × 7 hollow forgings, hollow forging air cooling is to room temperature.Hollow forging enters reheating furnace, heating hollow forging to 880 ± 5 DEG C, and temperature retention time is 10min.Go out after reheating furnace, hollow forging carries out stretch reducing through two roller stretch-reducing mills, and stretch reducing deflection is 36%, obtains the titanium alloy seamless pipe of Φ 89 × 7mm.Subsequently, on cold bed by its air cooling to room temperature.The metallurgical structure of the titanium alloy seamless pipe of this example gained shows that it has basket tissue.The mechanical property parameters of the titanium alloy seamless pipe that after testing, this example makes is as shown in table 2.

Example 3

This example production specification is the titanium alloy seamless pipe of Φ 73 × 6mm.

The titanium alloy (wherein, Ti be surplus) of melting forming component as shown in example in table 13, ingot casting, forges and makes Φ 160 circular pipe blanks.Heat circular pipe blank with rotary heating furnace, the furnace temperature that rotary heating furnace is set is 1180 DEG C, and temperature retention time is 40min, so that circular pipe blank temperature is 1175 ± 5 DEG C.Subsequently, circular pipe blank is carried out to roll piercing, to obtain hollow billet, hollow billet is carried out to tandem rolling to form 120 × 6 hollow forgings, hollow forging air cooling is to room temperature.Hollow forging enters reheating furnace, heating hollow forging to 870 ± 5 DEG C, and temperature retention time is 8min.Go out after reheating furnace, hollow forging carries out stretch reducing through two roller stretch-reducing mills, and stretch reducing deflection is 39%, obtains the titanium alloy seamless pipe of Φ 73 × 6mm.Subsequently, on cold bed by its air cooling to room temperature.The metallurgical structure of the titanium alloy seamless pipe of this example gained shows that it has basket tissue.The mechanical property parameters of the titanium alloy seamless pipe that after testing, this example makes is as shown in table 2.

Example 4

This example production specification is the titanium alloy seamless pipe of Φ 93 × 8mm.

The titanium alloy (wherein, Ti be surplus) of melting forming component as shown in example in table 14, ingot casting, forges and makes Φ 160 circular pipe blanks.Heat circular pipe blank with rotary heating furnace, the furnace temperature that rotary heating furnace is set is 1105 DEG C, and temperature retention time is 50min, so that circular pipe blank temperature is 1105 ± 5 DEG C.Subsequently, circular pipe blank is carried out to roll piercing, to obtain hollow billet, hollow billet is carried out to tandem rolling to form 140 × 8 hollow forgings, hollow forging air cooling is to room temperature.Hollow forging enters reheating furnace, heating hollow forging to 890 ± 5 DEG C, and temperature retention time is 12min.Go out after reheating furnace, hollow forging carries out stretch reducing through two roller stretch-reducing mills, and stretch reducing deflection is 33%, obtains the titanium alloy seamless pipe of Φ 93 × 8mm.Subsequently, on cold bed by its air cooling to room temperature.The metallurgical structure of the titanium alloy seamless pipe of this example gained shows that it has basket tissue.The mechanical property parameters of the titanium alloy seamless pipe that after testing, this example makes is as shown in table 2.

The chemical composition of titanium alloy liquid (% by weight) in table 1 example 1 to 5

Example 5

This example production specification is the titanium alloy seamless pipe of Φ 107 × 13mm.

The titanium alloy (wherein, Ti be surplus) of melting forming component as shown in example in table 15, ingot casting, forges and makes Φ 200 circular pipe blanks.Heat circular pipe blank with rotary heating furnace, the furnace temperature that rotary heating furnace is set is 1150 DEG C, and temperature retention time is 60min, so that circular pipe blank temperature is 1145 ± 5 DEG C.Subsequently, circular pipe blank is carried out to roll piercing, to obtain hollow billet, hollow billet is carried out to tandem rolling to form 180 × 13 hollow forgings, hollow forging air cooling is to room temperature.Hollow forging enters reheating furnace, heating hollow forging to 870 ± 5 DEG C, and temperature retention time is 18min.Go out after reheating furnace, hollow forging carries out stretch reducing through two roller stretch-reducing mills, and stretch reducing deflection is 40%, obtains the titanium alloy seamless pipe of Φ 107 × 13mm.Subsequently, on cold bed by its air cooling to room temperature.The metallurgical structure of the titanium alloy seamless pipe of this example gained shows that it has basket tissue.The mechanical property parameters of the titanium alloy seamless pipe that after testing, this example makes is as shown in table 2.

The mechanical property of the titanium alloy seamless pipe that table 2 example 1 to 5 makes

As can be seen from Table 2, the titanium alloy seamless pipe that method of the present invention obtains has good mechanical property, it is above (for example that its yield strength can reach 880MPa, 890MPa~930MPa), that tensile strength can reach 940MPa is above (for example, 960MPa~1000MPa), percentage elongation can reach more than 15 (for example, 18%~21%).

In sum, the present invention can be in the case of cancelling conventional heat treatment step, obtains and have excellent mechanical performances the titanium alloy seamless pipe of (for example, yield strength be greater than 880MPa, tensile strength are greater than 940MPa, percentage elongation is greater than 15%); And simplified operation, and reduce cost, improve production efficiency.

Although described the present invention with exemplary embodiment by reference to the accompanying drawings above, those of ordinary skill in the art should be clear, in the case of not departing from the spirit and scope of claim, can carry out various amendments to above-described embodiment.

Claims (6)

1. a production method for titanium alloy seamless pipe, is characterized in that, described production method comprises the following steps:
Smelting forming component is the titanium alloy of Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% and surplus Ti by weight percentage, and titanium alloy is made to circular pipe blank;
Heating circular pipe blank, so that circular pipe blank temperature is 1100~1200 DEG C;
Circular pipe blank is carried out to roll piercing to obtain hollow billet, hollow billet is carried out to tandem rolling to form hollow forging;
Hollow forging air cooling, to room temperature, with reheating furnace heating hollow forging to 860~900 DEG C, carries out stretch reducing, and stretch reducing deflection is 15~44%, and air cooling obtains titanium alloy seamless pipe.
2. the production method of titanium alloy seamless pipe according to claim 1, is characterized in that, it is 1130~1180 DEG C that the step of described heating circular pipe blank makes circular pipe blank temperature.
3. the production method of titanium alloy seamless pipe according to claim 1, is characterized in that, the described step with reheating furnace heating hollow forging, is heated to 875~890 DEG C by hollow forging.
4. the production method of titanium alloy seamless pipe according to claim 1, is characterized in that, described stretch reducing deflection is 22%~40%.
5. a titanium alloy seamless pipe, is characterized in that, described titanium alloy seamless pipe is by making according to the production method described in any one in claim 1 to 4.
6. titanium alloy seamless pipe according to claim 5, it is characterized in that, the composition of described titanium alloy seamless pipe is Al:5.6~6.7%, V:3.6~4.4%, Fe≤0.28%, C≤0.07%, O≤0.18%, N≤0.01%, H≤0.01% and surplus Ti by weight percentage, the mechanical property of described titanium alloy seamless pipe is: yield strength is greater than 880MPa, tensile strength is greater than 940MPa, and percentage elongation is greater than 15%.
CN201410119389.1A 2014-03-27 2014-03-27 Titanium alloy seamless tube and production method thereof CN103909111A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104178717A (en) * 2014-09-12 2014-12-03 攀钢集团成都钢钒有限公司 Thermal treatment method of titanium alloy oil tube
CN104259246A (en) * 2014-08-29 2015-01-07 攀钢集团成都钢钒有限公司 Method for producing high-strength titanium alloy seamless tube
CN104308461A (en) * 2014-08-26 2015-01-28 攀钢集团成都钢钒有限公司 Titanium alloy tube and production method thereof
CN104492850A (en) * 2014-12-02 2015-04-08 安徽天大石油管材股份有限公司 Production method of high-finish steel tube
CN104498849A (en) * 2014-12-05 2015-04-08 宁夏东方钽业股份有限公司 Process for preparing Ti662 titanium alloy tube material
CN104588410A (en) * 2014-12-19 2015-05-06 聊城鑫鹏源金属制造有限公司 Production technology of hot-rolling seamless pipe made of titanium alloy TC4 material
CN104745866A (en) * 2015-03-27 2015-07-01 常熟市双羽铜业有限公司 High strength seamless titanium alloy circular tube
CN105618508A (en) * 2016-03-23 2016-06-01 攀钢集团成都钢钒有限公司 Thin-walled TC4 titanium alloy seamless tube and production method thereof
CN105921524A (en) * 2016-05-11 2016-09-07 天津钢管集团股份有限公司 Controlled rolling method in seamless pipe hot rolling process
CN107377668A (en) * 2017-09-22 2017-11-24 攀钢集团研究院有限公司 Production method for the pure titanium hollow forging sizings of TA2
CN107653396A (en) * 2017-09-22 2018-02-02 宝鸡市金海源钛标准件制品有限公司 A kind of titanium tube of high-strength corrosion-resisting and preparation method thereof
CN107746998A (en) * 2017-10-24 2018-03-02 宝鸡金恒瑞金属科技有限公司 It is a kind of suitable for titanium alloy material of titanium alloy tube and preparation method thereof

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104308461B (en) * 2014-08-26 2016-08-24 攀钢集团成都钢钒有限公司 A kind of titanium alloy tube and production method thereof
CN104308461A (en) * 2014-08-26 2015-01-28 攀钢集团成都钢钒有限公司 Titanium alloy tube and production method thereof
CN104259246A (en) * 2014-08-29 2015-01-07 攀钢集团成都钢钒有限公司 Method for producing high-strength titanium alloy seamless tube
CN104259246B (en) * 2014-08-29 2016-08-24 攀钢集团成都钢钒有限公司 The method producing high strength titanium alloy seamless pipe
CN104178717A (en) * 2014-09-12 2014-12-03 攀钢集团成都钢钒有限公司 Thermal treatment method of titanium alloy oil tube
CN104492850A (en) * 2014-12-02 2015-04-08 安徽天大石油管材股份有限公司 Production method of high-finish steel tube
CN104498849A (en) * 2014-12-05 2015-04-08 宁夏东方钽业股份有限公司 Process for preparing Ti662 titanium alloy tube material
CN104588410A (en) * 2014-12-19 2015-05-06 聊城鑫鹏源金属制造有限公司 Production technology of hot-rolling seamless pipe made of titanium alloy TC4 material
CN104745866A (en) * 2015-03-27 2015-07-01 常熟市双羽铜业有限公司 High strength seamless titanium alloy circular tube
CN105618508A (en) * 2016-03-23 2016-06-01 攀钢集团成都钢钒有限公司 Thin-walled TC4 titanium alloy seamless tube and production method thereof
CN105921524A (en) * 2016-05-11 2016-09-07 天津钢管集团股份有限公司 Controlled rolling method in seamless pipe hot rolling process
CN107377668A (en) * 2017-09-22 2017-11-24 攀钢集团研究院有限公司 Production method for the pure titanium hollow forging sizings of TA2
CN107653396A (en) * 2017-09-22 2018-02-02 宝鸡市金海源钛标准件制品有限公司 A kind of titanium tube of high-strength corrosion-resisting and preparation method thereof
CN107746998A (en) * 2017-10-24 2018-03-02 宝鸡金恒瑞金属科技有限公司 It is a kind of suitable for titanium alloy material of titanium alloy tube and preparation method thereof

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