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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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Abstract

The invention discloses a manufacturing technique for stainless steel tubes used for hydraulic pipelines. The manufacturing technique sequentially comprises the following steps: heating for punching and head hitting are performed on the stainless steel tubes; primary acid pickling, grinding and lubricating are performed on the stainless steel tubes; cold-drawn processing is performed on the stainless steel tubes processed; ungrease treatment is performed on the stainless steel tubes; solid solution heat treatment is performed on the stainless steel tubes; straightening and tube cutting are performed on the stainless steel tubes; acid wash passivation treatment is performed on the stainless steel tubes, and eddy current inspection and ultrasonic flaw detection are performed on the stainless steel tubes; after inspection and detection, stenciling and warehousing are performed on qualified stainless steel tubes. The solid solution heat treatment and the acid wash passivation treatment in the manufacturing technique for the stainless steel tubes used for hydraulic pipelines can ensure that the produced stainless steel tubes meets requirements of standard internal and external surface smoothness and corrosion resistance of the hydraulic pipelines, and the like.

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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