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GH3600 alloy fine thin-walled seamless pipe manufacturing method

A manufacturing method and technology of seamless pipes, which are applied in the field of manufacturing GH3600 alloy fine thin-walled seamless pipes, can solve the problems of unspecified heat treatment temperature for finished products, uneven pipe structure, and difficulty in fine thin-walled pipes, etc., and achieve saving Energy consumption, increased material plasticity, and excellent performance effects

Active Publication Date: 2014-08-06
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN200810200844.5 discloses a method for manufacturing a superalloy GH3600 fine thin-walled seamless tube for aerospace, but this patent only involves the cold processing and heat treatment of the previous pass of the finished tube and the general control method of the grain size of the finished tube. The structure of the pipe is not uniform and small, and it does not involve the smelting, forging, capillary manufacturing method of the previous alloy, and the control method of the mechanical properties and surface quality of the finished pipe, and there is no clear regulation on the heat treatment temperature of the finished product
Its manufacturing method is difficult to manufacture GH3600 fine thin-walled tubes with high comprehensive performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Specifications are Preparation of GH3600 alloy fine thin-walled seamless tubes.

[0051] 1) The ingot is forged into an intermediate round tube billet

[0052] Using the method of vacuum induction smelting + electroslag remelting smelting, the GH3600 alloy ingot with the following chemical composition (weight percentage) is smelted:

[0053] C:0.02%, P:0.005%, S:0.002%, Si:0.05%, Mn:0.1%, Cr:14.2%, Fe:6.2%, Cu::0.02%, Al:0.15%, Nb:0.5% , Ti: 0.39%, Mg: 0.04%, and the rest are Ni and unavoidable impurities. The diameter of GH3600 alloy ingot is The length is 1500mm, the melted ingot is heated to 1150~1170℃, and after 5~6 hours of heat preservation, a 2000-ton fast forging press is used to carry out forging deformation with a deformation amount of 45%, and forging to an intermediate specification The octagon is 380mm, and then sent to the heating furnace for heating at 1150 ° C, and kept for 2 to 3 hours, and finally forged with a 1300-ton radial forging machine to...

Embodiment 2

[0073] Specifications are Preparation of GH3600 alloy fine thin-walled seamless tubes.

[0074] 1) The ingot is forged into an intermediate round tube billet

[0075] Using the method of vacuum induction smelting + electroslag remelting smelting, the GH3600 alloy ingot with the following chemical composition (weight percentage) is smelted:

[0076] C:0.05%, P:0.005%, S:0.002%, Si:0.05%, Mn:0.1%, Cr:16.8%, Fe:9.3%, Cu:0.02%, Al:0.10%, Nb:0.30%, Ti: 0.30%, Mg: 0.04%, and the rest are Ni and unavoidable impurities. The ingot diameter is The length is 1500mm, the melted ingot is heated to 1150~1170℃, and after 5~6 hours of heat preservation, a 2000-ton fast forging press is used for forging deformation with a deformation of 55%, and forging to an intermediate specification 380mm star anise, then hot sent to the heating furnace for 1150 ℃, 2~3 hours of heat preservation, and then forged with a 1300-ton radial forging machine to Black leather forged rod, after air cooling, t...

Embodiment 3

[0096] Specifications are Preparation of GH3600 alloy fine thin-walled seamless tubes.

[0097] 1) The ingot is forged into an intermediate round tube billet

[0098] Using the method of vacuum induction smelting + electroslag remelting smelting, the GH3600 alloy ingot with the following chemical composition (weight percentage) is smelted:

[0099] C:0.04%, P:0.005%, S:0.002%, Si:0.05%, Mn:0.1%, Cr:15.2%, Fe:8.3%, Cu:0.02%, Al:0.13%, Nb:0.4%, Ti: 0.33%, Mg: 0.04%, and the rest are Ni and unavoidable impurities. The diameter of GH3600 alloy ingot is The length is 1500mm, the melted ingot is heated to 1160°C, and after 5~6 hours of heat preservation, a 4000-ton fast forging press is used to carry out forging deformation with a deformation of 55%, and forging to an intermediate specification The octagon is 350mm, and then sent to the heating furnace for heating at 1140 ° C, and kept for 2.5 hours, and finally forged with a 1300-ton radial forging machine to Black leather...

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Abstract

The invention relates to a GH3600 alloy fine thin-walled seamless pipe manufacturing method, which comprises: adopting methods of vacuum induction smelting and electroslag remelting smelting to smelt a casting ingot meeting requirements; adopting a 2000 or 4000 ton rapid forging and 1300 ton radial forging thermal combined forging process to carry out cogging on the casting ingot so as to ensure complete crushing of the thick and large structure of the casting ingot, produce the round pipe billet with the uniform structure, increase the plasticity of material, and saves energy consumption; adopting a hot extrusion process to produce a lateral so as to ensure the uniformity of the internal structure of the lateral and the high quality of the external surface of the lateral, and make the performance of the produced finished product pipe excellent; and adopting a multi-pass cold rolling and cold drawing process and the matched heat treatment process, and assistedly adopting the special lubrication process and the cleaning process to control the structure and the high performance of the pipe so as to finally obtain the GH3600 alloy fine thin-walled pipe with characteristics uniform and fine pipe structure and high comprehensive performance.

Description

technical field [0001] The invention relates to the field of seamless pipe processing, in particular to a method for manufacturing a GH3600 alloy fine thin-wall seamless pipe. Background technique [0002] GH3600 alloy is a nickel-based high-temperature alloy, which has comprehensive properties of toughness, corrosion resistance and heat resistance, and is widely used in chemical and other industries. At the same time, the alloy also has high strength and good oxidation resistance at high temperatures. Used in the manufacture of important heat-resistant structural parts. [0003] GH3600 alloy fine thin-walled tubing has important applications in the aerospace field, for example, it is one of the very important units in an engine. This unit uses The GH3600 alloy pipe is made of high-quality GH3600 alloy pipe, which belongs to the hot-end part of the engine, which bears the impact of high temperature and has extremely high requirements on the quality of the pipe. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06C22F1/10
Inventor 欧新哲袁卫昌
Owner 宝武特种冶金有限公司
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