Production method of phi 762 * 48 mm large-diameter nickel-based alloy seamless tube for oil refining device

A technology of nickel-based alloys and oil refining equipment, which is applied in the field of iron and steel metallurgy, can solve the problems of inability to produce large-diameter thick-walled nickel-based seamless steel pipes, and achieve the effects of batch production, stable product performance, and optimized process parameters

Inactive Publication Date: 2021-03-09
ZHONGXING ENERGY EQUIP
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Problems solved by technology

Previously, the pipe had been relying on imports. In China, cross-rolling perforation + cold rolling and cold drawing were used for trial production, but large-diameter thick-walled nickel-based seamless steel pipes with a diameter above φ600mm and qualified performance could not be produced.

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  • Production method of phi 762 * 48 mm large-diameter nickel-based alloy seamless tube for oil refining device
  • Production method of phi 762 * 48 mm large-diameter nickel-based alloy seamless tube for oil refining device
  • Production method of phi 762 * 48 mm large-diameter nickel-based alloy seamless tube for oil refining device

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The target product of this example is a steel grade UNS NO8825, and the finished product specification is φ762×48mm large-diameter nickel-based alloy seamless pipe, which is used in the 20 million-ton oil refining unit of Hengli Petrochemical. 762mm is the diameter and 48mm is the wall thickness. The production method comprises the following steps:

[0022] 1) Smelting: electric furnace smelting, strict control of steelmaking raw materials, using electrolytic nickel, high-carbon ferrochrome, micro-carbon ferrochrome, molybdenum, pure copper, low P raw steel, 1550 ~ 1620 ℃ out of the furnace to tundish; argon oxygen furnace Refining, all raw and auxiliary materials are baked a...

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Abstract

The invention discloses a production method of a phi 762*48 mm large-diameter nickel-based alloy seamless tube for an oil refining device. The method comprises the steps of electric furnace smelting,argon oxygen furnace refining, ingot casting, electroslag remelting, forging, tube blank machining, perforating, cold drawing and heat treatment. Technological parameters are optimized. The obtained phi 762 * 48 mm large-diameter nickel-based alloy seamless tube is pure in material, uniform in components, controllable in grain size and good in corrosion resistance, and the inspection result meetsthe technical requirement of the ASTM B423 standard. The product quality can be effectively guaranteed, the yield is high, batch production is facilitated, imported goods can be replaced by the phi 762 * 48 mm large-diameter nickel-based alloy seamless tube, and the use requirement of domestic large oil refining devices for large-diameter thick-wall nickel-based alloy seamless tubes is met.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a production method of a φ762×48mm large-diameter nickel-based alloy seamless pipe for an oil refinery. Background technique [0002] The large-diameter alloy UNS NO8825 seamless pipe used in the process pipeline of the refinery hydrogenation unit is an important part in the process pipeline of the new generation of refinery hydrogenation unit. Its performance determines the acceptable quality of crude oil, the start-up time of the unit, and the maintenance of the unit cycle. The working environment of the pipeline is high-sulfur and high-acid, which is extremely corrosive. Therefore, pipelines with higher performance indicators, better safety, and longer design life are required. Previously, the pipe had been relying on imports. In China, cross-rolling perforation + cold rolling and cold drawing were used for trial production, but large-diameter thick-walled n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21J5/00
CPCB21C37/06B21J5/002
Inventor 仇云龙朱卫飞孙振平马小军曹亚楠
Owner ZHONGXING ENERGY EQUIP
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