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Electromagnetic depth control steel surface chemical treatment device and method thereof

A surface chemical treatment and treatment method technology, which is applied in the field of heterogeneous steel material preparation, can solve the problems of decreased welding performance and corrosion resistance, difficulty in realizing multi-level control of hardened layer, single control means of carburized layer thickness, etc., to achieve improved Wear resistance, shorter production cycle, and easy industrial production

Pending Publication Date: 2021-07-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, uniform carburizing has the following limitations: (1) The carburized layer thickness control method is single, and the control accuracy of the high carbon layer thickness is low. For parts with uneven wall thickness, it is difficult to achieve multi-level control of the hardened layer; (2) After carbon treatment, the carbon content on the surface of the part is significantly increased, and the welding performance and corrosion resistance are greatly reduced

Method used

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  • Electromagnetic depth control steel surface chemical treatment device and method thereof
  • Electromagnetic depth control steel surface chemical treatment device and method thereof

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Embodiment 1

[0032] (1) Pretreatment: Grind the 20Cr bar with No. 800, No. 1200 and No. 1600 sandpaper in turn to remove the rust and oxide film on the surface of the bar, remove the oil on the surface with acetone, and carry out pickling to remove the oxide film on the surface. Mark the parts where the magnetic field needs to be applied.

[0033] (2) Vacuumize and heat up: clamp the pretreated bar in such as figure 1 The sample holder in the experimental furnace shown is sealed with a sealing device. Place the part to be magnetized within the range of the magnetic field, turn on the vacuum pump to evacuate, turn off the vacuum pump when the pressure in the furnace is below 1000Pa, adjust the temperature control instrument to control the heating temperature at 950°C, and keep it warm for 30 minutes to ensure that the steel is evenly heated.

[0034] (3) Electromagnetic control deep carburizing: open the solenoid valve, pass high-purity propane and acetylene into the furnace as carburizing...

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Abstract

The invention provides an electromagnetic depth control heterogeneous steel material surface chemical treatment device and a method thereof. The electromagnetic depth control heterogeneous steel material surface chemical treatment device comprises a magnetizing assembly, a heating and cooling assembly, a furnace body, a clamping assembly and a carburizing assembly, and the treatment process of the electromagnetic depth control heterogeneous steel material surface chemical treatment device comprises the four working procedures of pretreatment, vacuumizing and heating, electromagnetic depth control carburizing and cooling. After the surface of a steel material is fully cleaned in the pretreatment procedure, in a vacuum environment, a multi-stage gradient magnetic field is applied to steel, electromagnetic depth-controlled carburizing treatment is carried out, and finally the high-strength, high-toughness and high-wear-resistance heterogeneous steel and iron material with the carburized layers distributed in a multi-stage manner is obtained.

Description

technical field [0001] The invention relates to an electromagnetically controlled deep steel surface chemical treatment device and a method thereof, belonging to the field of preparation of heterogeneous steel materials. Background technique [0002] As the most common structural material, iron and steel materials are widely used in construction, transportation, petrochemical and other fields, especially in some high-speed mechanical equipment. With the development of science and technology and modern industry, the significant increase in the operating speed of mechanical equipment puts forward higher requirements for the impact resistance and wear resistance of parts. Reasonable surface hardening treatment of steel materials can prevent premature damage to parts and significantly improve the stability of the overall machine operation, thereby ensuring the production efficiency of the equipment. [0003] After searching the prior art documents, it was found that "Extraordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22
CPCC23C8/22
Inventor 周浩徐涛高波肖礼容陈雪飞曹阳李玉胜聂金凤
Owner NANJING UNIV OF SCI & TECH
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