High-strength corrosion-resistant stainless steel pipe fitting and machining process thereof

A processing technology, stainless steel technology, applied in the field of high-strength corrosion-resistant stainless steel pipe fittings and its processing technology, can solve the problems of not being able to meet our expectations, not durable corrosion resistance, poor service life, etc., to achieve excellent tensile strength and mechanics Effects of performance, high usability, and improved corrosion resistance

Active Publication Date: 2021-08-27
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]Nowadays, most of the stainless steel pipe fittings purchased on the market have problems such as unsustainable corrosion resistance and poor service life. Some researchers also coated graphite oxide on the surface of stainless steel pipe fittings. Graphene oxide coating to improve its corrosion resistance, but due to the galvanic corrosion of graphene oxide, the actual application often fails to meet our expectations

Method used

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  • High-strength corrosion-resistant stainless steel pipe fitting and machining process thereof
  • High-strength corrosion-resistant stainless steel pipe fitting and machining process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A process for processing high-strength corrosion-resistant stainless steel pipe fittings, comprising the following steps:

[0039] (1) Take stainless steel pipe fittings, polish the outer surface, place them in acetone solution for ultrasonic cleaning for 10 minutes, then place them in absolute ethanol for ultrasonic cleaning for 20 minutes, deionized water for ultrasonic cleaning for 20 minutes, and vacuum dry to obtain pretreated pipe fittings;

[0040] (2) Take the pretreatment pipe, place it in the electrolyte, use the pretreatment pipe as the anode, and use the bidirectional pulse power supply for micro-arc oxidation, the oxidation time is 60min, and the current density is 10A / dm 2 , the temperature is 25°C, the duty cycle is 20%, take out the pretreatment tube and dry it at room temperature;

[0041] (3) Take the pretreated pipe fittings, and carry out ultrasonic rolling on the outer surface, the ultrasonic amplitude is 15um, the ultrasonic frequency is 15KHz, the...

Embodiment 2

[0048] A process for processing high-strength corrosion-resistant stainless steel pipe fittings, comprising the following steps:

[0049] (1) Take stainless steel pipe fittings, polish the outer surface, place them in acetone solution for ultrasonic cleaning for 15 minutes, then place them in absolute ethanol for ultrasonic cleaning for 23 minutes, deionized water ultrasonic cleaning for 25 minutes, and vacuum dry to obtain pretreated pipe fittings;

[0050] (2) Take the pretreatment pipe, put it in the electrolyte, use the pretreatment pipe as the anode, and use the bidirectional pulse power supply for micro-arc oxidation, the oxidation time is 65min, and the current density is 15A / dm 2 , the temperature is 30°C, the duty ratio is 30%, take out the pretreatment tube and dry it at room temperature;

[0051] (3) Take the pretreated pipe fittings and perform ultrasonic rolling on the outer surface. The ultrasonic amplitude is 18um, the ultrasonic frequency is 18KHz, the spindle ...

Embodiment 3

[0058] A process for processing high-strength corrosion-resistant stainless steel pipe fittings, comprising the following steps:

[0059] (1) Take a stainless steel pipe fitting, polish the outer surface, place it in an acetone solution for ultrasonic cleaning for 20 minutes, then place it in absolute ethanol for ultrasonic cleaning for 25 minutes, ultrasonically clean it with deionized water for 30 minutes, and dry it in vacuum to obtain a pretreated pipe fitting;

[0060] (2) Take the pretreated pipe, put it in the electrolyte, use the pretreated pipe as the anode, and use the bidirectional pulse power supply for micro-arc oxidation, the oxidation time is 70min, and the current density is 20A / dm 2 , the temperature is 35°C, the duty ratio is 40%, take out the pretreatment tube and dry it at room temperature;

[0061] (3) Take the pretreated pipe fittings and perform ultrasonic rolling on the outer surface. The ultrasonic amplitude is 20um, the ultrasonic frequency is 20KHz, ...

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Abstract

The invention discloses a high-strength corrosion-resistant stainless steel pipe fitting and a machining process thereof. The stainless steel pipe fitting is prepared from the following raw materials in percentage by mass: 0.03 to 0.05 percent of C, 14 to 16 percent of Cr, 8 to 10 percent of Mn, 0.8 to 1 percent of Si, less than or equal to 0.02 percent of P, less than or equal to 0.004 percent of S, 1 to 2 percent of Mo, 0.0001 to 0.002 percent of B, 4 to 5 percent of Ni, 0.03 to 0.08 percent of La and the balance of Fe and inevitable impurity elements. Under the component distribution, the stainless steel pipe fitting has excellent tensile strength and mechanical property. Meanwhile, the stainless steel pipe fitting is subjected to surface treatment, so that the surface strength and corrosion resistance of the stainless steel pipe fitting are improved. According to the high-strength corrosion-resistant stainless steel pipe fitting and the machining process thereof, the process design is reasonable, operation is easy, and the prepared stainless steel pipe fitting not only has excellent wear resistance and high surface strength, but also has excellent corrosion resistance, can be suitable for multiple application ranges and has high practicability.

Description

technical field [0001] The invention relates to the technical field of processing stainless steel pipe fittings, in particular to a high-strength corrosion-resistant stainless steel pipe fitting and its processing technology. Background technique [0002] Stainless steel refers to steel resistant to weak corrosive media such as air, steam, water, and chemically corrosive media such as acid, alkali, and salt, also known as stainless acid-resistant steel. With the advancement and development of science and technology, the metallurgical industry continues to progress. Nowadays, stainless steel products have gradually entered our lives and are widely used in many fields with high practicability. [0003] Nowadays, most of the stainless steel pipe fittings purchased on the market have problems such as unsustainable corrosion resistance and poor service life. Some researchers also apply graphene oxide coatings on the surface of stainless steel pipe fittings to improve their corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23F17/00C21D7/04C22C38/02C22C38/44C22C38/54C22C38/58C23C14/02C23C14/06C23C14/34C23C14/58C25D11/34C09D5/08C09D7/62C09D163/00
CPCC23C28/04C23F17/00C25D11/026C25D11/34C23C14/34C23C14/0647C23C14/022C23C14/028C23C14/584C21D7/04C22C38/02C22C38/58C22C38/44C22C38/54C22C38/005C09D163/00C09D5/08C09D7/62C08K3/042C08K9/04
Inventor 徐菁胡雄新桑传飞阮建军周秋华
Owner 江苏龙山管件有限公司
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