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A fine-drawing process for small-diameter thin-walled nickel-based tubes

A small-diameter, nickel-based technology, applied in the field of nickel-based pipe manufacturing, can solve the problems of inability to form, broken ends, and large demand for thin-walled nickel-based pipes, and achieves the effects of short holding time, not easy to break, and excellent tissue density.

Active Publication Date: 2021-12-03
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nickel-based tubes are widely used in heat exchangers due to their excellent comprehensive mechanical properties, high temperature resistance, and corrosion resistance, especially in the field of nuclear power. As small ships, power plants and even small civilian equipment are also designed to use nuclear power energy, Therefore, the demand for thin-walled nickel-based tubes will increase; generally precision tubes are manufactured by cold rolling or cold drawing, and it is almost impossible to manufacture such small-diameter thin-walled nickel-based tubes by cold rolling; One of the key technical bottlenecks is the failure of forming due to end breakage, so there is an urgent need for a fine drawing process for small-diameter thin-walled nickel-based tubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A fine drawing process for small-diameter thin-walled nickel-based tubes, comprising the following steps:

[0023] 1) Select the solid-solution N06600 nickel-based pipe with a specification of Φ16×1mm, and start it with a head length of 130mm and a head diameter of 9mm;

[0024] 2) The pipe obtained in step 1) is cold-drawn once to Φ14×0.85mm, and then annealed by resistance heating. The annealing temperature is controlled at 980-1050°C, and the holding time above 980°C is 15S;

[0025] 3) The pipe obtained in step 2) is subjected to secondary cold drawing to Φ12×0.75mm, and then resistive heating annealing is performed. The annealing temperature is controlled at 980-1050°C, and the holding time above 980°C is 15S;

[0026] 4) The pipe obtained in step 3) is cold drawn three times to Φ10×0.65mm, and the pipe is cut and then headed. The length of the head is 130mm and the diameter of the head is 6mm. Then the pipe is subjected to resistance heating and annealing. The te...

Embodiment 2

[0035] A fine drawing process for small-diameter thin-walled nickel-based tubes, comprising the following steps:

[0036] 1) Select the solid solution N06600 nickel-based pipe with a specification of Φ10×0.7mm, and start with a head, the length of the head is 180mm, and the diameter of the head is 4mm;

[0037] 2) The pipe obtained in step 1) is cold-drawn once to Φ9×0.6mm, and then annealed by resistance heating. The annealing temperature is controlled at 980-1050°C, and the holding time above 980°C is 5S;

[0038] 3) The pipe obtained in step 2) is cold-drawn twice to Φ8×0.55mm, and then annealed by resistance heating. The annealing temperature is controlled at 980-1050°C, and the holding time above 980°C is 5S;

[0039] 4) Cold draw the pipe obtained in step 3) three times to Φ7×0.5mm, cut the pipe, and then start the head. The length of the head is 180mm, and the diameter of the head is 6mm. Control at 980-1050°C, and the holding time above 980°C is 5S;

[0040] 5) Cold-...

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PUM

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Abstract

The present invention provides a small-diameter thin-walled nickel-based pipe fine drawing process, comprising the following steps: 1) Heading the nickel-based pipe; 2) Cold drawing the pipe; 3) Heating and annealing the pipe; 4) Repeating step 2 ) and step 3) multiple times of cold drawing and multiple heating and annealing of the tube; 5) solid solution treatment of the finished tube obtained in step 4) under a protective gas atmosphere, and then cooling; 6) the tube obtained in step 5) Straightening, head and tail cutting, inspection and testing, cutting to length, packaging and storage. The precision drawing process of the small-diameter thin-walled nickel-based tube of the present invention has high process operability, adopts resistance heating annealing, and reasonably controls the holding position, and the position close to the head can reduce cold deformation stress due to heat conduction of the tube and prevent thin-walled nickel-based tubes The cold drawing process breaks the head.

Description

technical field [0001] The invention relates to the technical field of nickel-based tube manufacturing, in particular to a small-diameter thin-walled nickel-based tube fine drawing process. Background technique [0002] Nickel-based tubes are widely used in heat exchangers due to their excellent comprehensive mechanical properties, high temperature resistance, and corrosion resistance, especially in the field of nuclear power. As small ships, power plants and even small civilian equipment are also designed to use nuclear power energy, Therefore, the demand for thin-walled nickel-based tubes will increase; generally precision tubes are manufactured by cold rolling or cold drawing, and it is almost impossible to manufacture such small-diameter thin-walled nickel-based tubes by cold rolling; One of the key technical bottlenecks is the failure of forming due to broken ends. Therefore, there is an urgent need for a fine drawing process for small-diameter thin-walled nickel-based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/22B21C9/00B21C5/00C22F1/10
CPCB21C1/22B21C5/003B21C9/00C22F1/10
Inventor 王植栋浦益龙周向东高云龙陈芳
Owner 江苏隆达超合金股份有限公司
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