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Process for preparing pipe by punching high temperature alloy bar

A technology for superalloys and pipes, applied in temperature control, metal rolling, etc., can solve problems such as low production efficiency and material waste, and achieve the effects of high work efficiency, wide application range and simple preparation method

Active Publication Date: 2016-12-07
JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to solve the problem of low production efficiency and serious waste of materials when extrusion or middle punching is used in the preparation of superalloy tube blanks, and to provide a method for preparing high-temperature alloy rods with high-quality pipes through perforation to prepare pipes. The prepared perforated pipe has uniform wall thickness, smooth inner and outer surfaces, and no cracks

Method used

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  • Process for preparing pipe by punching high temperature alloy bar
  • Process for preparing pipe by punching high temperature alloy bar
  • Process for preparing pipe by punching high temperature alloy bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A GH4145 superalloy pipe with an outer diameter of 30 mm and a wall thickness of 4 mm was prepared.

[0041] (1) Forging to produce billet: the GH4145 superalloy ingot prepared by vacuum melting method is forged and opened at 900°C to make a billet with a diameter of Φ40mm and the surface is polished;

[0042] (2) On-line induction heating of the billet: induction heating of the GH4145 superalloy billet with a diameter of Φ40mm, the heating temperature is 1000°C, and the heating time is 10 minutes;

[0043] (3) The front end of the three-roll planetary rolling mill is equipped with a perforated plug for billet rolling and piercing: the three-roll planetary rolling mill is used to roll the billet after induction heating, and the perforated plug is arranged at the front end of the planetary rolling mill roll to directly pass the GH4145 superalloy rod The billet is pierced into a pipe during rolling, the diameter of the piercing plug is 20mm, and the length of the piercing...

Embodiment 2

[0045] A GH5188 superalloy pipe with an outer diameter of 45 mm and a wall thickness of 7 mm was prepared.

[0046] (1) Forging to produce billet: the GH5188 superalloy ingot prepared by vacuum melting method is forged and opened at 1150°C to make a billet with a diameter of Φ60mm and the surface is polished;

[0047] (2) On-line induction heating of the billet: induction heating of the GH5188 superalloy billet with a diameter of Φ60mm, the heating temperature is 1200°C, and the heating time is 30 minutes;

[0048] (3) The front end of the three-roll planetary rolling mill is equipped with a perforated plug for billet rolling and piercing: the three-roll planetary rolling mill is used to roll the billet after induction heating, and the perforated plug is arranged at the front end of the planetary rolling mill roll to directly pass the GH5188 superalloy rod The billet is pierced into a pipe during rolling, the diameter of the piercing plug is 30mm, and the length of the piercin...

Embodiment 3

[0050] A Hastelloy C-276 superalloy pipe with an outer diameter of 60 mm and a wall thickness of 10 mm was prepared.

[0051] (1) Forging to produce billet: the Hastelloy C-276 superalloy ingot prepared by vacuum melting method is forged and opened at 1200°C to make a billet with a diameter of Φ80mm and the surface is polished;

[0052] (2) On-line induction heating of billets: induction heating of Hastelloy C-276 superalloy billets with a diameter of Φ80mm, the heating temperature is 1300°C, and the heating time is 60 minutes;

[0053] (3) The front end of the three-roll planetary rolling mill is equipped with a perforated plug for billet rolling and piercing: the three-roll planetary rolling mill is used to roll the billet after induction heating, and the perforated plug is arranged at the front end of the planetary rolling mill roll, and the Hastelloy C-276 The high-temperature alloy billet is pierced into a pipe during rolling. The diameter of the piercing plug is 40mm, an...

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Abstract

The invention relates to a process for preparing a pipe by punching a high temperature alloy bar. Firstly, a high temperature alloy ingot is subjected to hammer cogging at 900-1200 DEG C to obtain a bar blank; secondly, bar blank induction heating is conducted under the condition that the heating temperature is 1000-1300 DEG C and the heating time is 10-60 min; and finally, ejection headers are arranged at the front ends of rollers of a three-roller planetary rolling mill, and the bar is directly punched into the pipe during rolling. The method for preparing the pipe is simple, steps are easy to implement, high-frequency induction heating is adopted during bar blank punching and rolling, the working efficiency is high, and pollution is avoided; the wall thickness of the punched pipe is even, the inner surface and the outer surface of the punched pipe are smooth, no crack is caused, and the application range of the specifications and materials of the bar blank is wide.

Description

technical field [0001] The invention relates to a process for preparing pipes by piercing high-temperature alloy rods, and belongs to the technical field of pipe processing. Background technique [0002] Due to its excellent high temperature resistance and corrosion resistance, superalloys are mainly used in aerospace, electric power, automobiles, metallurgy, glass manufacturing, atomic energy and other industrial fields. With the development of superalloy materials and the emergence of new superalloy materials, The market demand for superalloys is gradually expanding and growing. However, due to the addition of a large number of alloying elements (and trace elements), especially the addition of Mo and W elements, superalloys can improve the degree of alloying and corrosion resistance. The alloy has higher thermal deformation resistance, and the inhomogeneity of the composition of the alloy increases, which easily leads to serious dendrite segregation during the solidificati...

Claims

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Application Information

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IPC IPC(8): B21B19/04B21B37/74
CPCB21B19/04B21B37/74B21B2201/06
Inventor 王颜臣浦益龙梁贺周向东
Owner JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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