Machining process for metal tube

A processing technology and metal tube technology, applied in the direction of metal material coating technology, etc., can solve the problems of easy rusting, affecting the processing of metal tubes, and rust inhibitor affecting the performance of electroplating, etc., to improve hardness, improve corrosion resistance and The effect of mechanical properties

Active Publication Date: 2016-12-14
NINGBO YADA METAL SURFACE TREATMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although electroplating is often used to improve the corrosion resistance of metal parts in the prior art, when electroplating metal pipes, the inner wall of the pipe is prone to rust because it cannot be electroplated, which affects the cleanliness of the product pipe, and some antirust agents will affect the processing. The performance of electroplating and affect the subsequent processing of metal pipes

Method used

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  • Machining process for metal tube

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: the processing technology of metal pipe

[0032] The alloy steel is processed and formed to obtain a metal pipe blank; the composition elements and mass percentages of the alloy steel are: C: 0.15%, Cr: 1.4%, Si: 0.18%, Mn: 0.95%, Al: 0.04%, N: 0.012%, Ti: 0.15%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0033] Treat the metal tube blank in the electroplating solution at 25°C for 80 minutes; the composition of the electroplating solution is: zinc oxide 6g / L, sodium hydroxide: 120g / L, nickel: 0.8g / L, additive: 220ml.

[0034] The metal tube blanks after electroplating are subjected to water washing, light treatment, passivation treatment, water washing, and antirust treatment in sequence to obtain metal tube semi-finished products; among them, the light treatment is a common and common light production process, and the composition of the passivation solution is: cerium nitrate : 1.8g / L, Accelerator H 2 o 2 :6ml / L, H 3 BO 3...

Embodiment 2

[0036] Embodiment 2: processing technology of metal pipe

[0037] Processing the alloy steel to obtain a metal pipe blank; the composition elements and mass percentages of the alloy steel are: C: 0.16%, Cr: 1.38%, Si: 0.22%, Mn: 1.08%, Al: 0.042%, N: 0.001%, Ti: 0.18%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0038] Treat the metal tube blank in the electroplating solution at 28°C for 100 minutes; the composition of the electroplating solution is: zinc oxide 6g / L, sodium hydroxide: 125g / L, nickel: 0.7g / L, additive: 280ml.

[0039] The metal tube blanks after electroplating are subjected to water washing, light treatment, passivation treatment, water washing, and antirust treatment in sequence to obtain metal tube semi-finished products; among them, the light treatment is a common and common light production process, and the composition of the passivation solution is: cerium nitrate : 2.2g / L, Accelerator H 2 o 2 :7ml / L, H 3 BO 3 Buffer: 2.2g / ...

Embodiment 3

[0041] Embodiment 3: processing technology of metal pipe

[0042] The alloy steel is processed and formed to obtain a metal pipe blank; the composition elements and mass percentages of the alloy steel are: C: 0.12%, Cr: 1.5%, Si: 0.15%, Mn: 1.15%, Al: 0.03%, N: 0.008%, Ti: 0.22%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0043] Treat the metal tube blank in the electroplating solution at 30°C for 50 minutes; the composition of the electroplating solution is: zinc oxide 7g / L, sodium hydroxide: 130g / L, nickel: 1g / L, additive: 300ml.

[0044] The metal tube blanks after electroplating are subjected to water washing, light treatment, passivation treatment, water washing, and antirust treatment in sequence to obtain metal tube semi-finished products; among them, the light treatment is a common and common light production process, and the composition of the passivation solution is: cerium nitrate : 2.5g / L, Accelerator H 2 o 2 :8ml / L, H 3 BO 3 Buffe...

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Abstract

The invention relates to a machining process for a metal tube and belongs to the technical field of alloy machining, aiming at solving the problem in the prior art that an inner wall of the metal tube cannot be electroplated and rust is prone to generate. The machining process comprises: machining and molding alloy steel to obtain a metal tube blank; treating the metal tube blank in an electroplating solution at 20 DEG C-30 DEG C for 50min-120min; carrying out polishing treatment, passivation treatment and rust prevention treatment on the electroplated metal tube blank in sequence to obtain a metal tube semi-finished product, wherein the temperature of the rust prevention treatment is 35 DEG C-45 DEG C, the pH (Potential of Hydrogen) value is 11-11.8 and the time is 20s-120s; and carrying out sealing treatment on the metal tube semi-finished product to obtain a metal tube finished product. By adopting the machining process, the corrosion resistance and mechanical properties of the metal tube are greatly improved and the corrosion resistance in the tube is also improved; and other processes are not influenced and other properties of the product are also not influenced.

Description

technical field [0001] The invention relates to a metal pipe processing technology, which belongs to the technical field of alloy processing. Background technique [0002] Steel is used in various aspects of industrial production and life. It plays a very important role in human life and work. It is the basis of scientific and technological development. However, steel is easy to rust in the atmosphere and the corrosion process is quite complicated. Different degrees of adverse effects on life, resulting in unnecessary economic losses. In my country, according to the 2008 survey results of the China Industrial and Natural Environment Corrosion Investigation Project Team, the direct economic loss caused by corrosion reached 230 billion yuan, and the indirect economic loss was 500-600 billion yuan, which was equivalent to 100% of my country's gross national product in that year. 5%. Therefore, it is very important to study methods to prevent steel corrosion. [0003] Although...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/04C25D5/48C25D3/56C23C22/50C22C38/18C22C38/02C22C38/04C22C38/06C22C38/14
CPCC22C38/02C22C38/04C22C38/06C22C38/14C22C38/18C23C22/50C25D3/562C25D5/48C25D7/04
Inventor 董阿能
Owner NINGBO YADA METAL SURFACE TREATMENT
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