Enriched energizer for low-temperature gas carburization of large-sized high-speed and heavy-duty thin-walled gear

A low-temperature gas, large-scale technology, used in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of complex infiltrating agent formulation, high cracking temperature, blockage of pipelines, etc., and increase the carbon diffusion coefficient. , The effect of reducing carburizing temperature and avoiding pipeline blockage

Pending Publication Date: 2020-11-06
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are: under the existing technology, the energy consumption is large, the deformation is lar

Method used

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  • Enriched energizer for low-temperature gas carburization of large-sized high-speed and heavy-duty thin-walled gear
  • Enriched energizer for low-temperature gas carburization of large-sized high-speed and heavy-duty thin-walled gear
  • Enriched energizer for low-temperature gas carburization of large-sized high-speed and heavy-duty thin-walled gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0011] The permeation agent comprises 6% by weight of rare earth, 12% of carbon tetrachloride, 3% of lithium zirconate and the balance of isomeric alcohol. The rare earth is composed of 90% lanthanum oxide and 10% cerium oxide. Weigh the raw materials according to the above ratio, mix them uniformly to form a penetrating agent, and dilute them with methanol at a ratio of 1:10. Put the 12CrNi3 workpiece with the surface passivation film removed into the carburizing furnace, vacuumize, feed the carburizing gas, heat the carburizing furnace, and start the carburizing treatment with the infusion agent dripping system at the same time, and set the carbon potential to 1.05%. Two carburizing temperatures of 890 and 930°C are designed, and four carburizing times are 1h, 3h, 5h and 7h respectively. After the carburizing is completed, the depth of the carburizing layer is measured by metallographic method. After detection and analysis, the depth of the carburized layer of this materia...

Embodiment example 2

[0017] The permeation agent includes 6% rare earth by weight, 12% carbon tetrachloride, 3% lithium zirconate, and the balance of isomeric alcohol. The rare earth is composed of 90% lanthanum oxide and 10% cerium oxide. Weigh the raw materials according to the above ratio, mix them uniformly to form a penetrating agent, and dilute them with methanol at a ratio of 1:10. Put the 18CrNiMo7 workpiece with the surface passivation film removed into the carburizing furnace, vacuumize, feed the carburizing gas, heat the carburizing furnace, and start the carburizing treatment with the infusion agent dripping system at the same time, and set the carbon potential to 1.05%. Two carburizing temperatures of 890 and 930°C are designed, and four carburizing times are 1h, 3h, 5h and 7h respectively. After the carburizing program is completed, the depth of the carburizing layer is measured by metallographic method, and the infiltration effect is shown in Table 1.

Embodiment example 3

[0019] The permeation agent includes 6% rare earth by weight, 12% carbon tetrachloride, 3% lithium zirconate, and the balance of isomeric alcohol. The rare earth is composed of 90% lanthanum oxide and 10% cerium oxide. Weigh the raw materials according to the above ratio, mix them uniformly to form a penetrating agent, and dilute them with methanol at a ratio of 1:10. Put the 20Cr2Ni4A workpiece with the surface passivation film removed into the carburizing furnace, vacuumize, feed the carburizing gas, heat the carburizing furnace, and start the carburizing treatment by turning on the infiltrating agent dripping system at the same time, setting the carbon potential to 1.05%. Two carburizing temperatures of 890 and 930°C were designed, and four carburizing times were 1h, 3h, 5h and 7h. After completing the carburizing procedure, the metallographic method was used to measure the depth of the carburizing layer, and the infiltration effect is shown in Table 1.

[0020] Table 1 R...

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Abstract

The invention provides an enriched energizer for low-temperature gas carburization of a large-sized high-speed and heavy-duty thin-walled gear and belongs to the technical field of chemical heat treatment. The energizer comprises the following components in percent by weight: 5-8% of rare earth, 10-20% of carbon tetrachloride, 1-5% of lithium zirconate and the balance heterogeneous alcohols, wherein the rare earth is composed of 90% of lanthanum oxide and 10% of cerium oxide. By taking the rare earth, carbon tetrachloride, lithium zirconate and heterogeneous alcohols as raw materials which areweighed in proportion and are uniformly mixed to form the energizer, the energizer is used for gas carburization of the large-sized high-speed and heavy-duty thin-walled gear. The energizer decreasesthe carburization temperature, shortens the carburization time and reduces deformation and further improves the surface hardness, wear resistance and fatigue performance, so that the service life ofthe gear is prolonged.

Description

technical field [0001] An enriched infiltration agent for low-temperature gas carburizing of large-scale high-speed heavy-duty thin-walled gears Background technique [0002] Carburizing is one of the most common heat treatments for case hardening of gears and many other parts. 90% of large-size high-speed heavy-duty thin-walled gears need carburizing treatment. In production practice, engineers and technicians often use the method of carburizing and quenching the tooth surface to improve the anti-failure ability of gear teeth, so as to improve the bearing capacity of the gear and prolong the service life. Especially for large-size high-speed heavy-duty thin-walled gears, how to improve fatigue strength and control deformation without affecting the carburizing speed is an urgent problem to be solved. Accelerating the heat treatment process by infiltration technology is an effective means to reduce carburizing temperature and energy consumption, among which rare earth infil...

Claims

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Application Information

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IPC IPC(8): C23C8/20
CPCC23C8/20
Inventor 王鑫铭刘克杨兵文涛欧阳雪枚
Owner XIANGTAN UNIV
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