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Nitriding agent for oxynitrocarburizing technology and preparation method thereof

A technology of nitriding agent, nitrogen, carbon and oxygen, which is applied in the field of nitriding agent and its preparation of nitrocarburizing technology, which can solve the problems of poor fluidity and stability, high density of nitriding agent, low yield of finished products, etc. problems, to achieve the effect of stable quality, low production cost and increased yield

Pending Publication Date: 2020-08-07
江苏奕华新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the present invention provides a nitriding agent for nitrocarburizing technology and a preparation method thereof, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and solves the problems of the existing nitriding Nitriding agent produces the eutectic reaction aging time long, and finished product yield is low, and the problem of high density, low fluidity and poor stability of nitriding agent, nitriding agent in the present invention uses sodium cyanurate, cyanate (sodium potassium ), carbonate (sodium potassium) as basic raw materials, rare earth chloride (cerium lanthanum) and carbonate rare earth (cerium lanthanum) as catalyst, lithium carbonate as high temperature stabilizer, potassium chloride as balancer, Using potassium aluminum sulfate as corrosion inhibitor and flocculant, a eutectic reaction is formed according to melting theory, and in the smelting process, cyanuric acid is used as a medium material to solve the problem of eutectic by melting intermediates, and stable quality and high penetration rate are obtained. Controllable and environmentally friendly nitriding agent formula

Method used

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  • Nitriding agent for oxynitrocarburizing technology and preparation method thereof
  • Nitriding agent for oxynitrocarburizing technology and preparation method thereof
  • Nitriding agent for oxynitrocarburizing technology and preparation method thereof

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preparation example Construction

[0035] A nitriding agent for nitrocarburizing technology and a preparation method thereof, comprising the following mass fractions:

[0036]

[0037] The present invention is by adding lanthanum cerium rare earth element, and lanthanum cerium rare earth is used as catalyst, can improve seepage velocity, conventional knowledge all understands that rare earth has the effect of urging infiltration in surface treatment industry, but adding ratio has unique peak value according to nitriding agent formula.

[0038] The present invention has the effect of anti-high temperature stability to the whole nitriding agent by adding a small amount of lithium carbonate, so it is also necessary to form the melting intermediate of the nitriding agent, so as to reduce the shortage of raw materials and the waste of cost.

[0039] In this example, Na+:K+=1:1.1 in the nitriding agent. According to the theory of fusion eutectic design, the ratio of Na+:K+ is 1:1.1, and the eutectic composition for...

Embodiment 1

[0055]

[0056] Smelting and refining steps:

[0057] Step 1: Divide the penetrating agent into:

[0058] Penetration agent base agent (sodium cyanurate, sodium cyanate, potassium cyanate, potassium carbonate, sodium carbonate, potassium chloride) accounted for 91%;

[0059] Penetrating agent melting intermediates (lithium carbonate, potassium aluminum sulfate, cerium chloride, lanthanum carbonate) account for 9%;

[0060] Step 2: Prepare the media material cyanuric acid as the weight ratio of 5% of the penetrating agent

[0061] Step 3: Melt the penetrating agent into the intermediate, then add the medium material cyanuric acid, melt and keep it at 520-550°C for 4 hours, and cool it into a block;

[0062] Step 4: Heat the penetrating agent base agent at 580-620°C for 4 hours, then add the penetrating agent to melt the intermediate, and keep warm for 2 hours;

[0063] Step 5: Cool into blocks and pack according to the specified weight.

[0064]

Embodiment 2

[0066]

[0067] Smelting and refining steps:

[0068] Step 1: Divide the penetrating agent into:

[0069] Penetration agent base agent (sodium cyanurate, sodium cyanate, potassium cyanate, potassium carbonate, sodium carbonate, potassium chloride) accounted for 92%;

[0070] Penetration agent melting intermediate (lithium carbonate, potassium aluminum sulfate, cerium chloride, lanthanum carbonate) accounted for 8%;

[0071] Step 2: The medium material cyanuric acid is 20% by weight of the penetrating agent;

[0072] Step 3: Melt the penetrating agent into the intermediate, then add the medium material cyanuric acid, melt and keep it at 520-550°C for 4 hours, and cool it into a block;

[0073] Step 4: Heat the penetrating agent base agent at 580-620°C for 4 hours, then add the penetrating agent to melt the intermediate, and keep warm for 2 hours;

[0074] Step 5: Cool into blocks and pack according to the specified weight.

[0075]

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Abstract

The invention relates to the technical field of nitriding agents for an oxynitrocarburizing technology, and provides a nitriding agent for the oxynitrocarburizing technology and a preparation method thereof. The nitriding agent comprises the following components by mass, 5%-8% of C3N3Na3O3, 15%-25% of KCNO, 15%-28% of NaCNO, 10%-15% of Na2CO3, 10%-15% of K2CO3; 15%-18% of KCl, 1%-3% of CeCl3, 1%-3% of La2 (CO3) 3 and 3%-5% of LI2CO3. The nitriding agent overcomes the defects in the prior art, solves the problems of long reaction aging time, low finished product yield, high density and poor stability in the eutectic production of an existing nitriding agent, takes sodium cyanate, cyanate and carbonate as basic raw materials, takes chlorate rare earth and carbonate rare earth as catalysts, takes lithium carbonate as a high-temperature stabilizer, takes potassium chloride as a balancing agent, takes aluminum potassium sulfate as a corrosion inhibitor and a flocculating agent, and forms aneutectic reaction according to a fusion theory; and the eutectic problem is solved by taking cyanuric acid as a medium material in a melting process in a manner of melting an intermediate, so that the environment-friendly nitriding agent formula with stable quality and controllable nitriding speed is obtained.

Description

technical field [0001] The present invention relates to the technical field of nitriding agent for nitrocarburizing technology, in particular to a nitriding agent for nitrocarburizing technology and a preparation method thereof. Background technique [0002] Nitrogen-carbon-oxygen composite treatment technology, which is a salt-bath composite nitrogen-carbon-oxygen non-metallic treatment technology, specifically refers to a composite treatment process in which the workpiece is polished and re-oxidized after nitrocarburizing and oxidation. When executing the compound process, according to the specific requirements of the workpiece, the process can be increased or decreased. The modification technology can greatly improve the wear resistance and corrosion resistance of the metal surface, and the workpiece hardly deforms. It is a new metal surface strengthening modification technology. This technology realizes the combination of nitriding process and oxidation process; the com...

Claims

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Application Information

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IPC IPC(8): C23C8/58C23C8/54
CPCC23C8/58C23C8/54Y02P10/20
Inventor 祝伟李远辉任肖帆王梁
Owner 江苏奕华新材料科技有限公司
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