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High-corrosion-resistance nickel-copper alloy seamless pipe and manufacturing method thereof

A technology of nickel-copper alloy and manufacturing method, applied in the field of seamless pipes, can solve the problems such as the oxide scale is not easily washed off, the deformation is difficult, and the deformation resistance is large, so as to ensure the quality of the inner surface, the corrosion inhibition effect, and the stress good condition

Inactive Publication Date: 2016-02-17
HUZHOU HUATE STAINLESS STEEL TUBES MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems that are prone to occur in production and processing: 1. Difficult to perforate, prone to cracks, and easy to peel on the surface; 2. Difficult to cold rolling, difficult to deform, and high deformation resistance; Rough, severe surface corrosion

Method used

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  • High-corrosion-resistance nickel-copper alloy seamless pipe and manufacturing method thereof
  • High-corrosion-resistance nickel-copper alloy seamless pipe and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for manufacturing a high-corrosion-resistant nickel-copper alloy seamless pipe, comprising the steps of:

[0045] Step 1, smelting, its chemical composition is calculated by weight percentage: Ni≥60, Cu35-37, Fe≤2, Mn≤1, C<0.4, Si<0.3, S<0.015, Pb<0.01, Bi<0.15, Sn<0.22, Sb<0.13, the balance is unavoidable trace elements. .

[0046] Step 2, casting a circular tube blank.

[0047] Step 3: Heating the circular tube blank.

[0048] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0049] Step 4. Piercing. The temperature range is controlled at 651°C-898°C. The piercing plug used is equipped with a lubricant injection device, which can continuously spray the lubricant from ...

Embodiment 2

[0058] A method for manufacturing a high-corrosion-resistant nickel-copper alloy seamless pipe, comprising the steps of:

[0059] Step 1, smelting, its chemical composition is calculated by weight percentage: Ni≥60, Cu35-37, Fe≤2, Mn≤1, C<0.4, Si<0.3, S<0.015, Pb<0.01, Bi<0.15, Sn<0.22, Sb<0.13, the balance is unavoidable trace elements. .

[0060] Step 2, casting a circular tube blank.

[0061] Step 3: Heating the circular tube blank.

[0062] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0063] Step 4. Piercing. The temperature range is controlled at 651°C-898°C. The piercing plug used is equipped with a lubricant injection device, which can continuously spray the lubricant from ...

Embodiment 3

[0072] A method for manufacturing a high-corrosion-resistant nickel-copper alloy seamless pipe, comprising the steps of:

[0073] Step 1, smelting, its chemical composition is calculated by weight percentage: Ni≥60, Cu35-37, Fe≤2, Mn≤1, C<0.4, Si<0.3, S<0.015, Pb<0.01, Bi<0.15, Sn<0.22, Sb<0.13, the balance is unavoidable trace elements. .

[0074] Step 2, casting a circular tube blank.

[0075] Step 3: Heating the circular tube blank.

[0076] From the heating furnace used to heat the round tube blank in the step 3 to the piercer for piercing the circular tube blank in the step 4, a heat preservation channel for the circular tube blank to pass is set to ensure that the circular tube blank The temperature drop between the heating and the piercing machine is less than 10 degrees.

[0077] Step 4. Piercing. The temperature range is controlled at 651°C-898°C. The piercing plug used is equipped with a lubricant injection device, which can continuously spray the lubricant from ...

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Abstract

The invention discloses a high-corrosion-resistance nickel-copper alloy seamless pipe. Chemical components of the high-corrosion-resistance nickel-copper alloy seamless pipe comprise, by weight, 60% of Ni or more, 35%-37% of Cu, 2% of Fe or less, 1% of Mn or less, C smaller than 0.4%, Si smaller than 0.3%, S smaller than 0.015%, Pb smaller than 0.01%, Bi smaller than 0.15%, Sn smaller than 0.22%, Sb smaller than 0.13% and the balance inevitable micro elements. A manufacturing method of the high-corrosion-resistance nickel-copper alloy seamless pipe comprises the following steps of smelting, casting of a round pipe blank, heating of the round pipe blank, perforating, the first time of acid pickling, cold rolling, degreasing, heat treatment, finishing and the second time of acid pickling. The manufactured high-corrosion-resistance nickel-copper alloy seamless pipe is smooth in surface, free of cracks, good in surface quality, high in size precision and excellent in corrosion resistance. The manufacturing method is short in procedure, easy and convenient to operate, high in efficiency and yield and low in cost, pickling waste water concentration and treatment cost.

Description

technical field [0001] The invention belongs to the technical field of seamless pipes, in particular to a highly corrosion-resistant nickel-copper alloy seamless pipe and a manufacturing method thereof. Background technique [0002] Nickel-copper alloy seamless pipe is an alloy made of metal nickel as the base and adding copper, iron, manganese and other elements. It is silvery white and has excellent corrosion resistance to reducing media. It is used in hydrofluoric acid, Alkali, sea water, H 2 S, H 2 SO 4 、H 3 PO 4 It has good stability in many corrosive media such as organic acids, especially in hydrofluoric acid and alkaline solutions, and is only inferior to platinum and silver. The alloy performs extremely well in high-concentration salt water environments. At present, most seamless pipe enterprises use cold drawing or cold rolling process to manufacture seamless steel pipes. The main production process of cold rolling (drawing) seamless steel pipes: billet prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03B23P15/00
CPCC22C19/03B23P15/00
Inventor 冯亚琦吴建平
Owner HUZHOU HUATE STAINLESS STEEL TUBES MFG
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