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A rolling method of high-precision titanium alloy pipe

A titanium alloy, high-precision technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve unsatisfactory problems and achieve the effect of reducing rolling defects, good dimensional tolerance, and good internal and external surface quality

Active Publication Date: 2016-08-17
宁夏中色金航钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The roughness of the outer surface of the TA18 aerospace titanium tube processed by this patent method is Ra≤0.8μm, the roughness of the inner surface is Ra≤1.6μm, the tolerance of the outer diameter is not more than 0.05mm, the tolerance of the inner diameter is not more than 0.04mm, and the wall thickness The dimensional tolerance is no more than 5% of the nominal wall thickness, the result is relatively good, but not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] TA18 φ70×5mm is used to extrude the tube blank, and it is produced by LG60 two-roll cold rolling mill and LD60 three-roll cold rolling mill to produce φ35×3.5mm. The rolling method is single-feed and double-rotation (single-feed and double-rotation refers to one feed in one rolling cycle of the rolling mill, and one rotation of about 57° at the front and rear dead centers.), two The Q value of roll rolling is 0.41-0.47, the Q value of three-roll rolling is 0.5-1.46, and the gap is 0.2-1mm. When rolling, the chlorinated paraffin is used as the inner wall lubricant, and the mixture of engine oil and paraffin is used as the outer wall lubricant (weight ratio 8-10:1). After rolling, the pipe is ultrasonically cleaned and degreased before heat treatment, and then pickled (HF: HNO 3 :H 2 O=5~12:45~60:100 (volume ratio) mixed solution, soak for 3~10min), wash and dry. After one pass of rolling, the inner surface is bored. After each rolling pass, the heat treatment system ...

Embodiment 2

[0030] TA18 φ90×10mm cross-rolled perforated tube billet is used to produce φ20×1mm through LG120, LG60, LG30 two-roll cold-rolling mills and LD60, LD30 three-roll cold-rolling mills. The rolling method is single-feed and double-rotation (single-feed and double-rotation refers to one feed in one rolling cycle of the rolling mill, and one rotation of about 57° at the front and rear dead centers.), two The Q value of roll rolling is 0.4-1.1, the Q value of three-roll rolling is 0.4-5, and the gap is 0.3-1.5mm. When rolling, the chlorinated paraffin is used as the inner wall lubricant, and the mixture of engine oil and paraffin is used as the outer wall lubricant (weight ratio 8-10:1). After rolling, the pipe is ultrasonically cleaned and degreased before heat treatment, and then pickled (HF: HNO 3 :H 2 O=5~12:45~60:100 (volume ratio) mixed solution, soak for 3~10min), wash and dry. After the 1st and 3rd passes of rolling, the inner surface is bored. After each rolling pass, ...

Embodiment 3

[0032] TC4 φ80×10mm is used to extrude the tube blank, and it is produced through LG90, LG60 two-roll cold rolling mill and LD60 three-roll cold rolling mill to produce φ40×1.2mm. The rolling method is single-feed and double-rotation (single-feed and double-rotation refers to one feed in one rolling cycle of the rolling mill, and one rotation of about 57° at the front and rear dead centers.), two The Q value of roll rolling is 0.5-0.9, the Q value of three-roll rolling is 0.8-3, and the gap is 0.2-1.2mm. When rolling, the chlorinated paraffin is used as the inner wall lubricant, and the mixture of engine oil and paraffin is used as the outer wall lubricant (weight ratio 8-10:1). After rolling, the pipe is ultrasonically cleaned and degreased before heat treatment, and then pickled (HF: HNO 3 :H 2 O=5~12:45~60:100 (volume ratio) mixed solution, soak for 3~10min), wash and dry. After the 1st and 2nd pass of rolling, the inner surface is bored. After each rolling pass, the he...

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Abstract

The invention relates to a rolling method of high-precision titanium alloy pipe material. The method is to roll the prepared titanium alloy tube billet by combining two rolls and three rolls. The rolling method is single-feeding and double-turning, controlled The Q value of two-roll rolling is 0.4-2, the Q value of multi-roll rolling is 0.4-9, and the gap is 0.2-2mm. After the rolled finished pipe is processed by external surface polishing and internal surface honing Titanium alloy pipes with outer surface roughness Ra≤0.6μm, inner surface roughness Ra≤0.2μm, outer diameter tolerance≤0.04mm, inner diameter tolerance≤0.03, and wall thickness tolerance≤3% of the nominal wall thickness were obtained. Compared with the prior art, the present invention has higher dimensional tolerance precision of the obtained product and better inner and outer surface quality.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a rolling method of a high-precision titanium alloy pipe. Background technique [0002] With the in-depth development of my country's aerospace, petrochemical and nuclear power industries, the demand for high-precision, high-strength, corrosion-resistant, and high-temperature-resistant titanium alloy pipes is becoming more and more extensive. The requirements are also becoming more stringent. [0003] At present, the preparation methods of titanium alloy pipes are as follows: 1. Machining the billet before drilling; 2. Perforating the billet by extrusion or skew rolling, warm rolling or cold rolling after boring; 3. , Direct coil welding with plates. Among them, in the method of producing titanium alloy pipes by rolling, due to the characteristics of low elastic modulus, high specific strength, and large deformation resistance of titanium alloys, it is easy to crack duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/06B21B45/02
Inventor 李永林朱宝辉蔡国帅孟鑫刘彦昌王培军
Owner 宁夏中色金航钛业有限公司
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