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High-corrosion-resistance stainless steel and preparation method thereof

A stainless steel, corrosion-resistant technology, applied in coatings, metal material coating processes, solid-state diffusion coatings, etc., can solve the problems of uneven nitriding, insufficient uniformity, catalyst peeling, etc., to promote nitriding reaction, contact Large area, the effect of promoting the speed of progress

Pending Publication Date: 2021-05-07
李江巡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology, solve the poor connection between the rare earth catalyst and the workpiece in the prior art and the lack of uniformity when coating the surface of the workpiece, which will easily lead to uneven nitriding. At the same time, as the high temperature continues effect, the catalyst falls off from the surface of the workpiece, which will easily lead to the continuous slowdown of the nitriding rate, which is not conducive to the efficiency of the nitriding process. A kind of high corrosion-resistant stainless steel and its preparation method proposed by the present invention

Method used

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  • High-corrosion-resistance stainless steel and preparation method thereof
  • High-corrosion-resistance stainless steel and preparation method thereof
  • High-corrosion-resistance stainless steel and preparation method thereof

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preparation example Construction

[0033] Such as Figure 1 to Figure 2 Shown, the preparation method of a kind of high corrosion-resistant stainless steel of the present invention, the preparation method of described high corrosion-resistant stainless steel comprises the following steps:

[0034] S1: Put the stainless steel ingot in a high-temperature melting furnace and raise the temperature to 1600°C for high-temperature melting for 30-40 minutes, then raise the temperature to 1700°C for 10-15 minutes for heat preservation and smelting. During the smelting process, continue to carry out slag removal treatment, and obtain refined steel after smelting;

[0035] S2: Finely grind the surface of the refined steel in S1 with 500-mesh fine sandpaper. After the grinding, the steel is degreased, washed with water, pickled, and washed with ultrasonic vibration, and then put into the dryer for drying. Preheat the steel to 50-60°C during the process;

[0036] S3: Put the rare earth alloy material in the ethanol solutio...

Embodiment approach

[0043] As an embodiment of the present invention, wherein the preparation method of the rare earth alloy material in S3 comprises the following steps:

[0044] Ⅰ: Dissolve aluminum alloy ingots in a high-temperature melting furnace with an inert protective gas, control the temperature of the high-temperature melting furnace to rise to 900-1200°C for high-temperature smelting, and continue to carry out slag removal during the smelting process to control smelting and slag removal Treatment for 30-35 minutes; high-temperature melting of the aluminum alloy ingot, and then effectively remove the oxidized impurities contained in the aluminum alloy ingot, thereby reducing the impurity content in the final rare earth alloy, avoiding the reduction of the catalyst’s ability to absorb nitrogen particles, This leads to a reduction in the catalytic effect of the catalyst on the nitriding process;

[0045] Ⅱ: Pass the rare earth powder with 15-20% of the aluminum alloy liquid mass into a hi...

Embodiment 1-2

[0054] In order to verify that the catalyst prepared by the method of the present invention has the strength of the promoting effect on the stainless steel nitriding process, embodiment 1-2 is specially set up;

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Abstract

The invention belongs to the technical field of stainless steel surface modification, and particularly relates to high-corrosion-resistance stainless steel and a preparation method thereof. The preparation method comprises the following steps that S1, a stainless steel ingot is placed in a high-temperature smelting furnace, the temperature is increased to 1,600 DEG C, high-temperature smelting is conducted for 30-40 min, then the temperature is increased to 1,700 DEG C, heat preservation smelting is conducted for 10-15 min, slagging-off treatment is continuously conducted in the smelting process, refined steel is prepared after smelting is completed; S2, the surface of the steel refined in the S1 is finely ground through 500-mesh fine sandpaper, the ground steel is sequentially subjected to oil removal, primary water washing, acid pickling and ultrasonic vibration water washing, the washed steel is then introduced into a drying machine, and the steel is preheated to 50-60 DEG C in the drying process; and S3, a rare earth alloy material is put into an ethanol solution, and is introduced into a planetary ball mill, the rotating speed of the planetary ball mill is controlled to be 500-600 r / min, high-speed milling is conducted, the milled rare earth alloy material is introduced into a molecular sieve for filtering, the aperture of the molecular sieve is controlled to be 350-500 meshes, and filtering is conducted to obtain catalyst powder.

Description

technical field [0001] The invention belongs to the technical field of stainless steel surface modification, in particular to a high corrosion-resistant stainless steel and a preparation method thereof. Background technique [0002] In the prior art, the surface of the steel is easily corroded by the environment during long-term use, which leads to corrosion of the steel, which in turn leads to a decrease in the strength of the steel, which in turn causes the fracture and damage of the steel components. Therefore, the corrosion resistance of stainless steel is extremely high. Importantly, in order to improve the corrosion resistance of the surface of stainless steel in the prior art, most of the surface of the stainless steel is treated with corrosion resistance, among which nitriding technology is a high-quality modification method for the surface of the steel, but due to the Most of the nitriding process is carried out at a higher temperature, and the penetration efficienc...

Claims

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Application Information

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IPC IPC(8): C23C8/02C23C8/26C22C33/04C22C38/04C22C38/48C22C38/50
CPCC23C8/02C23C8/26C22C38/04C22C38/50C22C38/48C22C38/002C22C33/04Y02P10/20
Inventor 李江巡王浩
Owner 李江巡