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Method of manufacturing corrosive-resistant single-body hydraulic supporter by salt bath nitriding

A single hydraulic prop, corrosion-resistant technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as hydrogen embrittlement, coating peeling off, environmental pollution, etc., and achieve fatigue resistance. High, good sealing performance, good anti-corrosion performance

Inactive Publication Date: 2007-03-07
新汶矿业集团通力机械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods have the following disadvantages: (1) serious environmental pollution, which is not conducive to physical and mental health, (2) hydrogen embrittlement, which affects the comprehensive mechanical properties of the substrate, (3) there are pores in the coating, and corrosion spots appear along the anti-corrosion surface first , causing pitting on the substrate, causing the coating to fall off in flakes, further accelerating the corrosion of the substrate, and affecting the sealing performance of the product

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] A method for manufacturing a single hydraulic prop with corrosion resistance through salt bath nitriding, the method comprising the following steps: degreasing, rust removal→alkaline cleaning→cleaning→nitridation salt bath→oxidizing salt bath→cooling→cleaning→ Oiled. Specifically:

[0016] (1) The parts that need anti-corrosion treatment on the surface are pre-treated by surface degreasing, rust removal, etc., placed in the tooling and fixed, and then put in an alkaline solution at 75°C for alkaline washing for 5 minutes;

[0017] (2) Put it in a clean water tank at room temperature and wash it for 5 minutes;

[0018] (3) Put it into an electric furnace to preheat to 360°C, and put it into a nitriding salt bath in a nitriding furnace;

[0019] (4) put into oxidizing salt bath in 440 ℃ oxidation furnace;

[0020] (5) After cooling to room temperature, perform the first cleaning at a temperature of 55°C, and perform the second cleaning at a temperature of 80°C;

[002...

Embodiment 2

[0025] According to the method described in Example 1: (1) Put it into an electric furnace and preheat it to 350° C., and put it into a nitriding salt bath in a nitriding furnace. (2) Put it into an oxidation salt bath in an oxidation furnace at 420°C. (3) After cooling to room temperature, the first cleaning is performed at a temperature of 50°C, and the second cleaning is performed at a temperature of 75°C. (4) Put it into an oil immersion tank at 35°C for oil immersion, and then inspect and put it into storage.

Embodiment 3

[0027] According to the method described in Example 1: (1) Put it into an electric furnace and preheat it to 340° C., and put it into a nitriding salt bath in a nitriding furnace. (2) Put it into an oxidation salt bath in an oxidation furnace at 430°C. (3) After cooling to room temperature, the first cleaning is performed at a temperature of 60°C, and the second cleaning is performed at a temperature of 85°C. (4) Put it into an oil immersion tank at 40°C for oil immersion, and then inspect and put it into storage.

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PUM

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Abstract

The invention discloses a corrosion resistant reinforcing method of disposed component in the salt bath of monomer hydraulic column, which comprises the following steps: removing oil and rust; washing through alkaline; cleaning; nitrogenizing in the salt bath; oxidizing in the salt bath; cooling; cleaning; immersing in the oil.

Description

technical field [0001] The present invention relates to a method for the salt bath nitriding treatment of monolithic hydraulic struts to impart enhanced corrosion resistance to the resulting treated components. Background technique [0002] According to the research and application situation at home and abroad, there are two types of single hydraulic props: internal injection type and external injection type. The external injection type single hydraulic prop is easy to operate, fast, stable in the initial support force, and widely used. Due to the harsh production conditions under the mine, the high air humidity, and the acid and alkaline solution of the mine water, it is easy to make the pillar work together to cause electrochemical corrosion and affect its sealing performance, which cannot meet the requirements for use, and the emulsion is used as the working medium. Single hydraulic props will cause pollution to groundwater resources during use, which is not conducive to ...

Claims

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Application Information

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IPC IPC(8): C23C8/58C23F1/14
Inventor 孙玉祥高文良张正运段秀兰闫秀禄公丕敬王昕王吉庆
Owner 新汶矿业集团通力机械有限责任公司
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