Formula and process method for surface ceramic treatment of iron-based powder metallurgical parts

An iron-based powder metallurgy and ceramic technology, which is applied in the coating process and coating of metal materials, can solve the problems of anti-corrosion, poor anti-rust function, low surface hardness, poor corrosion resistance, etc., and achieve improved fatigue resistance , The effect of reducing the friction coefficient and improving the impact toughness

Inactive Publication Date: 2014-08-13
张佑锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Iron-based powder metallurgy is a process in which iron powder is used as the base material, and a small amount of precious metal powder, such as tungsten, molybdenum, chromium, etc., is added to form a mold and then sintered at a high temperature. The high temperature is controlled at about 1200 degrees, because it can be formed Parts with more complex shapes can replace parts that are diffi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example one:

[0032] A formula for ceramizing iron-based powder metallurgy surface layers. The composition of the ceramizing salt bath solution is as follows:

[0033] Na 2 B 4 O 2 20%, 50% NaCl, AlF 3 10%, V 4 C1 3 It is 5%, M0-Fe is 5%, Re-Mg is 5%, and the above-mentioned raw materials are all 300 mesh powder castellations.

[0034] A process method for ceramizing iron-based powder metallurgy surface layer is made according to the following steps:

[0035] 1. Degrease the sintered powder cast iron metallurgical parts with metal cleaning agent;

[0036] 2. Preheating: heating in the drying furnace to 120℃ and drying with hot air;

[0037] 3. Surface layer ceramization: put the preheated parts into the above ceramization salt bath solution, and take it out after standing at 500°C for 30 minutes;

[0038] 4. Cleaning and drying: The parts after ceramizing the surface layer are cleaned with hot water at 60°C and transferred to a hot air drying oven for drying;

[0039] 5. One passiv...

Example Embodiment

[0043] Embodiment two:

[0044] The difference between this embodiment and the first embodiment is that the composition of the ceramic salt bath solution is as follows:

[0045] Na 2 B 4 O 2 25%, 40% NaCl, AlF 3 15%, V 4 C1 3 It is 10%, M0-Fe is 4%, Re-Mg is 6%, and the above-mentioned raw materials are all 300 mesh powder castellations.

Example Embodiment

[0046] Embodiment three:

[0047] The difference between this embodiment and the first embodiment is that the composition of the ceramic salt bath solution is as follows:

[0048] Na 2 B 4 O 2 30%, 40% NaCl, AlF 3 10%, V 4 C1 3 It is 8%, M0-Fe is 6%, Re-Mg is 6%, and the above-mentioned raw materials are all 350 mesh powder castellations.

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PUM

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Abstract

The invention relates to an iron-based powder metallurgy technology, and in particular discloses a formula and process method for surface ceramic treatment of the iron-based powder metallurgical parts. The technical problem to be solved is to provide a formula and a process method for surface ceramic treatment of the iron-based powder metallurgical parts with strong anticorrosive and antirust function, high surface hardness and high abrasiveness. A ceramic salt bath solution comprises the following components: 15-30% of Na2B4O2, 40-60% of NaCl, 5-15% of AlF3, 1-10% of V4C13, 4-6% of Mo-Fe and 4-6% of Re-Mg, wherein the raw materials are all powder of 300-400 meshes. The surface hardness of the powder metallurgical part subjected to surface ceramic treatment is improved from original HV250-350 to HV600-700, the abrasion resistance is doubled, the anti-fatigue performance is improved by 30%, and the impact toughness is improved by 40%.

Description

technical field [0001] The invention relates to an iron-based powder metallurgy technology, in particular to a formula and a process method for ceramicizing an iron-based powder metallurgy surface layer. Background technique [0002] Iron-based powder metallurgy is a process in which iron powder is used as the base material, and a small amount of precious metal powder, such as tungsten, molybdenum, chromium, etc., is added to form a mold and then sintered at a high temperature. The high temperature is controlled at about 1200 degrees, because it can be formed Parts with more complex shapes can replace parts that are difficult to process, and have certain cost advantages. During high-temperature sintering, they can form a uniform microporous matrix, have good oil storage properties, and have certain wear resistance. Therefore, in It is widely used in industrial parts, but its anti-corrosion and anti-rust functions are poor, its surface hardness is low, and its abrasion resist...

Claims

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Application Information

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IPC IPC(8): C04B35/515C23C24/10
Inventor 张佑锋
Owner 张佑锋
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