Preparation process of wear-resistant bending-resistant pipe

A preparation process and technology of preparation steps are applied in the field of preparation technology of wear-resistant and pressure-resistant elbows, which can solve the problems of inconvenient maintenance, serious wear and corrosion of the inner wall of the elbows, and easy damage, so as to ensure the pressure resistance, strengthen the bonding effect and The effect of uniform distribution and the effect of reducing the surface wear rate

Active Publication Date: 2022-07-22
江苏龙山管件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of transporting materials in the current elbow, the material replenishment impacts the inner wall of the elbow, which can wear the elbow. During the long-term transportation process, the inner wall of the elbow is severely worn and corroded, prone to damage, and is not easy to maintain.

Method used

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  • Preparation process of wear-resistant bending-resistant pipe
  • Preparation process of wear-resistant bending-resistant pipe
  • Preparation process of wear-resistant bending-resistant pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The invention provides a preparation process of a wear-resistant and pressure-resistant elbow, and the specific preparation steps are as follows:

[0032] Step 1: Use the stainless steel pipe as the inner lining layer and the straight seam welded pipe as the outer base layer to adopt the hydroforming method to make the bimetal composite pipe;

[0033] Step 2: Use bimetal composite pipe for hot push processing to make a pressure-resistant elbow;

[0034] Step 3: Spray the inner and outer walls of the elbow with PTFE composite material to obtain a semi-finished wear-resistant and pressure-resistant elbow;

[0035] Step 4: The semi-finished wear-resistant and pressure-resistant elbow is treated by plasma enhanced chemical vapor deposition to obtain the wear-resistant and pressure-resistant elbow;

[0036] The polytetrafluoroethylene composite material, calculated by weight percentage, includes: 3.6% polyethylene oxide, 9.6% wollastonite, 15.6% polyvinylpyrrolidone, 8.6% c...

Embodiment 2

[0046] The difference from Example 1 is that in step 1, in the hydroforming method, the bulging pressure is 180MPa, the initial gap is 2.5mm, and the wall thickness of the liner is 4mm; in step 2, during the hot pushing process, the heating temperature is 980°C , the holding time is 3min; the cooling rate of water spray is 15℃ / s; the tempering temperature is 510℃, and the holding time is 51min; in step 3, electrostatic spraying is used, the electrostatic high voltage is 80KV, the electrostatic current is 20μA, and the flow rate is The pressure is 0.45MPa, the atomization pressure is 0.40MPa, and the distance between the nozzle of the spray gun and the pipe wall is 260mm; in step 4, during the plasma enhanced chemical vapor deposition process, the semi-finished wear-resistant and pressure-resistant elbow is placed in the plasma enhanced The inside of the deposition chamber in the chemical vapor deposition equipment is evacuated, and then nitrogen gas is introduced for pretreatme...

Embodiment 3

[0048] Different from Examples 1-2, in step 1, in the hydroforming method, the bulging pressure is 170MPa, the initial gap is 2.0mm, and the wall thickness of the liner is 3mm; in step 2, during the hot pushing process, the heating temperature is The temperature is 965°C, the holding time is 2.5min; the cooling rate of water spray is 12°C / s; the tempering temperature is 495°C, and the holding time is 48min; is 15μA, the flow rate pressure is 0.40MPa, the atomization pressure is 0.38MPa, and the distance between the nozzle of the spray gun and the pipe wall is 245mm; in step 4, during the plasma enhanced chemical vapor deposition treatment process, put the semi-finished wear-resistant and pressure-resistant elbow into the Go to the inside of the deposition chamber in the plasma-enhanced chemical vapor deposition equipment, evacuate, and then pass nitrogen for pretreatment, and at the same time pass methane for deposition; 170W, growth for 75min, and reaction temperature of 360℃...

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Abstract

The invention discloses a preparation process of a wear-resistant and pressure-resistant bent pipe, and particularly relates to the technical field of metal bent pipes. In the first step, the bimetal composite pipe is manufactured, and the pressure resistance, abrasion resistance and corrosion resistance of the bent pipe are guaranteed; in the second step, hot pushing treatment is conducted, the hot pushing treatment effect of the bent pipe is guaranteed, and the quality of the bent pipe is better; in the third step, a polytetrafluoroethylene composite material coating is formed on the inner wall and the outer wall of the bent pipe through electrostatic spraying, and the abrasion resistance and the corrosion resistance of the inner wall and the outer wall of the bent pipe can be effectively enhanced; in the fourth step, plasma enhanced chemical vapor deposition treatment is carried out, nitrogen carries out modification treatment on the surface of polytetrafluoroethylene, a hydrogenated amorphous carbon film is deposited on the surface of the polytetrafluoroethylene composite material coating, and the surface abrasion rate of the inner wall and the outer wall of the bent pipe can be effectively reduced. And the binding force between the carbon film and the polytetrafluoroethylene composite material coating is larger, so that the stability of connection between the hydrogenated amorphous carbon film and the polytetrafluoroethylene composite material coating is ensured.

Description

technical field [0001] The invention relates to the technical field of metal elbows, and more particularly, to a preparation process of a wear-resistant and pressure-resistant elbow. Background technique [0002] Bending pipe is bent by a complete set of bending equipment, which can be divided into two processes: cold simmering and hot pushing. The bending method that does not heat or change the material structure at room temperature. The hot push bend is also called the medium frequency heat push bend. After cutting the material, the straight pipe is placed on the induction ring of the bending part of the steel pipe, and the pipe head is stuck by the mechanical rotating arm. , the intermediate frequency current is used to heat the steel pipe in the induction ring; when the temperature of the steel pipe rises to a plastic state, the mechanical thrust of the steel pipe at the rear end of the steel pipe pushes the bending, and the elbow part is rapidly cooled with coolant, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D5/08B05D7/14B05D7/22B05D7/24B05D3/14C09D127/18C09D5/08C09D7/61C09D7/65
CPCB05D5/00B05D5/083B05D7/225B05D7/24B05D7/146B05D3/148C09D127/18C09D5/08C09D7/61C09D7/65C09D7/70B05D2254/06B05D2506/15B05D2202/15C08L2203/18C08L71/02C08L39/06C08L79/08C08L75/04C08K3/34C08K7/06Y02A20/20
Inventor 张强王佳汤洪良卞晓丽闵超蒋凯
Owner 江苏龙山管件有限公司
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