Manufacturing technique for stainless steel tubes used for hydraulic pipelines

A technology of stainless steel pipes and hydraulic pipes, applied in the direction of metal material coating process, manufacturing tools, furnace types, etc., can solve problems such as pipe rupture and oil leakage

Inactive Publication Date: 2017-10-24
浙江义腾特种钢管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above situations will eventually cause the pipeline to rupture and leak oil.

Method used

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  • Manufacturing technique for stainless steel tubes used for hydraulic pipelines
  • Manufacturing technique for stainless steel tubes used for hydraulic pipelines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] combine figure 1 , the production process of a stainless steel pipe for hydraulic pipelines involved in this embodiment, follows the steps in turn,

[0032] Step A: Heating the stainless steel tube blank, and performing heating, piercing and heading on a direct current frequency conversion piercing machine, the heating temperature is 1400° C., and kept for 20 minutes.

[0033] Step B, carry out the first pickling to the stainless steel pipe after step A treatment, and carry out grinding and lubricating; Potassium acid 20g / L, the rest is deionized water, the pickling temperature is 45°C, and the pickling time is 20 minutes.

[0034] Step C, cold-drawing the stainless steel pipe treated in step B to the required diameter and wall thickness.

[0035] Step D, carry out degreasing treatment to the stainless steel tube after step C treatment; The degreasing solution used in the degreasing treatment contains sodium hydroxide, sodium bicarbonate, sodium phosphate, sodium sili...

Embodiment 2

[0063] combine figure 1 , the production process of a stainless steel pipe for hydraulic pipelines involved in this embodiment, follows the steps in turn,

[0064] Step A: Heating the stainless steel tube blank, and performing heating, piercing and heading on a DC frequency conversion piercer, the heating temperature is 1200° C., and kept for 30 minutes.

[0065] Step B, carry out the first pickling to the stainless steel pipe after step A treatment, and carry out grinding and lubricating; Potassium acid potassium 50g / L, the rest is deionized water, the pickling temperature is 55°C, and the pickling time is 10 minutes.

[0066] Step C, cold-drawing the stainless steel pipe treated in step B to the required diameter and wall thickness.

[0067] Step D, degreasing the stainless steel pipe after the step C treatment; the degreasing solution used in the degreasing treatment contains sodium hydroxide, sodium bicarbonate, sodium phosphate, sodium silicate; the mass percentage of s...

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PUM

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Abstract

The invention discloses a production process of stainless steel pipes for hydraulic pipelines. The following steps are followed in order to heat, perforate and head the stainless steel pipe blanks; carry out pickling for the first time on the stainless steel pipes, and carry out grinding and lubrication; The finished stainless steel pipe is processed by cold drawing; the stainless steel pipe is degreased; the stainless steel pipe is subjected to solution heat treatment; the stainless steel pipe is straightened and cut; the stainless steel pipe is pickled and passivated; , pipe body inspection, ultrasonic flaw detection; the stainless steel pipes that pass the inspection and flaw detection are put into storage. The production process of stainless steel pipes for hydraulic pipelines involved in the present invention includes solid solution heat treatment and pickling passivation treatment so that the produced stainless steel pipes can meet the requirements of hydraulic pipeline standards for smoothness of internal and external surfaces and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of production of stainless steel pipes, in particular to a production process of stainless steel pipes for hydraulic pipelines. Background technique [0002] Stainless steel pipes for hydraulic pipelines generally require no oxide layer on the inner and outer walls, no leakage under high pressure, high precision, high finish, no deformation in cold bending, flaring, flattening, and no cracks. When the smoothness of the inner surface of the hydraulic pipeline is not enough, when the hydraulic oil is polluted, the oil pipe will be worn and corroded, and the rupture of the pipeline will be accelerated to cause oil leakage, and this damage is not easy to be found, and the harm is even more serious. [0003] Since the hydraulic system is easily polluted, the hydraulic oil containing solid pollutants is similar to the abrasive used to grind the metal processing surface, which increases the friction between the oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06C21D9/08C21D1/74C23G1/08C23C22/62
CPCB21C37/06C21D1/74C21D9/08C23C22/62C23G1/086
Inventor 朱则军
Owner 浙江义腾特种钢管有限公司
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