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Stainless steel pipe machining method

A stainless steel pipe and processing method technology, applied in the field of stainless steel pipe manufacturing, can solve the problems of stainless steel pipe strength, poor tensile resistance, corrosion resistance, poor matching ratio, short service life, etc., to achieve improved corrosion resistance and good sealing performance , long service life effect

Inactive Publication Date: 2018-04-06
吴文君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing stainless steel pipe composition ratio is not reasonable, the nitrogen content in the stainless steel pipe is usually low, basically below 2.5wt%, the strength, tensile strength and corrosion resistance of the stainless steel pipe are poor, and the service life is short

Method used

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Effect test

Embodiment 1

[0025] A processing method for a stainless steel pipe, comprising the following steps:

[0026] (1) Molten steel refining: a: sintering: select blank material, the blank material is 200kg of iron ore, 120kg of laterite nickel ore, 10kg of coke, 50kg of silicon dioxide, 30kg of manganese dioxide, 100kg of copper ore, the iron ore The water content of the ore is 10%, and the water content of the laterite nickel ore is 20%; after being ground by a grinder, it is placed in a sintering furnace for sintering and reduction; specifically, after the blank is ground by a grinder, it needs to pass 800 Mesh sieve; the temperature of the sintering furnace is 1200°C, the pressure is 1Mpa, and the sintering time is 72h; b: smelting: the billets, molten steel 500L and rare earth elements 50kg after sintering reduction are put into the smelting furnace, and obtained after melting Raw materials; specifically, the temperature of the smelting furnace is 1500°C, the pressure is 1.2Mpa, and the sme...

Embodiment 2

[0035] A processing method for a stainless steel pipe, comprising the following steps:

[0036] (1) Molten steel refining: a: sintering: select blank material, the blank material is 220kg of iron ore, 180kg of laterite nickel ore, 15kg of coke, 70kg of silicon dioxide, 50kg of manganese dioxide, 150kg of copper ore, the iron ore The water content of the ore is 30%, and the water content of the laterite nickel ore is 40%; after being ground by a grinder, it is placed in a sintering furnace for sintering and reduction; specifically, after the blank is ground by a grinder, it needs to pass 1000 Mesh sieve; the temperature of the sintering furnace is 1200°C, the pressure is 5Mpa, and the sintering time is 96h; b: smelting: the billet, molten steel 500L and rare earth element 70kg are dropped into the smelting furnace through sintering reduction, and obtained after melting Raw materials; specifically, the temperature of the smelting furnace is 1600°C, the pressure is 1.5Mpa, and th...

Embodiment 3

[0042] A processing method for a stainless steel pipe, comprising the following steps:

[0043] (1) Molten steel refining: a: sintering: select blank material, the blank material is 200kg of iron ore, 130kg of laterite nickel ore, 15kg of coke, 50kg of silicon dioxide, 30kg of manganese dioxide, 110kg of copper ore, the iron ore The water content of the ore is 20%, and the water content of the laterite nickel ore is 25%; after being ground by a grinder, it is placed in a sintering furnace for sintering and reduction; specifically, after the blank is ground by a grinder, it needs to pass 800 Mesh sieve; the temperature of the sintering furnace is 1200°C, the pressure is 4Mpa, and the sintering time is 80h; b: smelting: the billets, molten steel 500L and rare earth elements 50kg after sintering reduction are dropped into the smelting furnace, and obtained after melting Raw materials; specifically, the temperature of the smelting furnace is 1550°C, the pressure is 1.3Mpa, and the...

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Abstract

The invention discloses a stainless steel pipe machining method. The stainless steel pipe machining method comprises the following steps that (1) liquid steel is smelted, specifically, a, sintering isconducted, b, smelting is conducted, and c, nitrogen is introduced; (2) continuous casting is conducted, specifically, a raw material treated through the step (1) is subjected to continuous steel casting through a continuous casting machine, and a round pipe blank is obtained; and (3) fixed cutting and acid pickling are conducted, specifically, the pipe plank is cut into blanks being 4-6 m long through a cutting machine, then the blanks are subjected to acid pickling and passivating through stainless steel acid pickling and passivating solution, and heating is conducted. The nitrogen contentof the stainless steel is up to 3.5-5 wt%, and the effect that a stainless steel pipe has good corrosion resistant, tensile strength and high strength is ensured; meanwhile, rare earth elements and copper elements are added for synergistic effect, killed bacterial microbial species in stainless steel is effectively increased, time is greatly shortened, the efficiency is improved, and the corrosionresistance of stainless steel is improved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing stainless steel pipes, and in particular relates to a processing method for stainless steel pipes. Background technique [0002] ​Stainless steel is a hollow long round steel material, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. The existing stainless steel pipe composition ratio is not reasonable, the nitrogen content in the stainless steel pipe is usually low, basically below 2.5wt%, the strength, tensile strength and corrosion resistance of the stainless steel pipe are poor, and the service life is short . Contents of the invention [0003] In order to overcome the shortcomings of the prior art, the invention provides a processing method for stainless steel pipes with high nitrogen content and long service life. [0004] In order to achieve the above object, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22C33/04B22D11/00B23P15/00C22C38/16
CPCC22B1/16B22D11/002B22D11/006B23P15/00C22C33/04C22C38/001C22C38/005C22C38/16
Inventor 吴文君
Owner 吴文君
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