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Manufacturing method of small-caliber thin-wall cladding pipe and cladding pipe

A manufacturing method and cladding tube technology, applied in metal rolling and other directions, can solve problems such as processing technology precision, and achieve the effects of excellent performance, good process stability, and high dimensional accuracy

Pending Publication Date: 2021-12-03
国核宝钛锆业股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a small-diameter thin-wall cladding pipe manufacturing method and cladding pipe to solve the problem of precision in existing processing technology

Method used

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  • Manufacturing method of small-caliber thin-wall cladding pipe and cladding pipe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] a. Blank preparation, select a zirconium alloy tube with a certain length of Φ63.5mm×10.92mm as the tube blank;

[0054] b. Multiple cold rolling, pickling and annealing

[0055] All rolling passes adopt two-roller periodic pipe rolling equipment; the first cold rolling rolling speed is 40-60 times / min, and the feeding amount is 1.2-2.5mm / time. The adjustment of the rolling mill strictly controls the outer diameter of the cold-rolled pipe, Wall thickness and other dimensions and internal and external surface quality, to obtain zirconium alloy tubes of Φ31mm×5mm; the second rolling speed is 120-180 times / min, the feed rate is 0.8-1.5mm / time, and the adjustment of the rolling mill strictly controls the cold-rolled pipes Outer diameter, wall thickness and other dimensions and inner and outer surface quality, to obtain a zirconium alloy tube of Φ17mm×2mm; the third rolling speed is 200-280 times / min, the feeding amount is 0.5-1mm / time, and the rolling mill is adjusted to st...

Embodiment 2

[0064] a. Blank preparation, select a zirconium alloy tube with a certain length of Φ63.5mm×10.92mm as the tube blank;

[0065] b. Multiple cold rolling, pickling and annealing

[0066] All rolling passes adopt two-roller periodic pipe rolling equipment; the first cold rolling rolling speed is 40-60 times / min, and the feeding amount is 1.2-2.5mm / time. The adjustment of the rolling mill strictly controls the outer diameter of the cold-rolled pipe, Wall thickness and other dimensions and internal and external surface quality, to obtain zirconium alloy tubes of Φ31mm×5mm; the second rolling speed is 120-180 times / min, the feed rate is 0.8-1.5mm / time, and the adjustment of the rolling mill strictly controls the cold-rolled pipes Outer diameter, wall thickness and other dimensions and inner and outer surface quality, to obtain a zirconium alloy tube of Φ17mm×2mm; the third rolling speed is 200-280 times / min, the feeding amount is 0.5-1mm / time, and the rolling mill is adjusted to st...

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Abstract

The invention discloses a manufacturing method of a small-caliber thin-wall cladding pipe and the cladding pipe. The manufacturing method comprises the steps that a pipe blank is subjected to N times of cold rolling, N is an integer larger than or equal to 4, degreasing and annealing are carried out once every time cold rolling is completed, and a rough cladding pipe is manufactured; the rough cladding pipe is straightened, and the cladding pipe is manufactured; and the deformation amount of cold rolling is controlled to be 60-85%, and the ratio of the wall reduction rate to the diameter reduction rate of cold rolling operation is 1.1-3.0. The manufacturing method of the small-caliber thin-wall cladding pipe is good in process stability and high in yield, and the prepared small-caliber thin-wall cladding pipe is high in size precision, good in size consistency and stability and excellent in corrosion resistance, pulling performance, blasting performance, CSR and the like.

Description

technical field [0001] The invention belongs to the technical field of titanium-zirconium alloy processing, and in particular relates to a method for manufacturing a small-diameter thin-wall cladding pipe and the cladding pipe. Background technique [0002] Zirconium alloys have unique corrosion resistance and good mechanical properties, and are often used as cladding for nuclear fuel. A national strategic pilot technology project requires a special zirconium alloy thin-walled tube of a certain specification as the cladding tube of the fuel element. mm, the surface roughness is less than 0.8μm. However, the existing domestic thin-walled pipe manufacturing technology has low precision and unstable performance, and it is difficult to meet the processing accuracy and performance requirements of the zirconium alloy thin-walled pipes of the above specifications required by nuclear reactors. Contents of the invention [0003] (1) Purpose of the invention [0004] The purpose ...

Claims

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Application Information

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IPC IPC(8): B21C37/06B21B23/00C22F1/18C23G1/10
CPCB21B23/00B21C37/06C22F1/186C23G1/106
Inventor 薛艳丽高世奇孙阳平崔卫东罗晓东成亚辉李小影于海慧
Owner 国核宝钛锆业股份公司
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