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Carburizing method suitable for instillation type gas carburizing furnace

A technology of gas carburizing and carburizing furnace, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve the problems of surface decarburization, easy oxidation, serious carbon black accumulation, etc., and achieve bright surface, The effect of inhibiting oxidation

Pending Publication Date: 2022-03-22
大连长丰实业总公司
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Problems solved by technology

However, when the carburizing process is carried out according to the original method, the inspection of the uniformity of the depth of the carburized layer is often unqualified;
[0015] c. The accumulation of carbon black on the surface of the carburized layer of the product is serious, and it is very easy to oxidize during the cooling process and cause surface decarburization

Method used

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  • Carburizing method suitable for instillation type gas carburizing furnace
  • Carburizing method suitable for instillation type gas carburizing furnace
  • Carburizing method suitable for instillation type gas carburizing furnace

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Embodiment Construction

[0044] The specific implementation manners of the present invention are further explained below in conjunction with the examples and accompanying drawings, but are not intended to limit the present invention.

[0045] Such as figure 1 As shown, a carburizing method suitable for a drip-type gas carburizing furnace includes the following steps:

[0046] (1) Preparation of carburizing equipment before formal carburizing

[0047] If the carburizing equipment is continuously used for carburizing and maintains a stable carburizing temperature and atmosphere in the furnace, this preparation work is not required; if the carburizing equipment is used intermittently, it should be preheated and warmed up before use. Pre-infiltration, the specific process is as follows:

[0048] Equipment preheating process: set the temperature at 920°C, and conduct electric heating on the carburizing furnace. After the equipment reaches temperature, the carburizing furnace preheating and holding time i...

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Abstract

The invention discloses a carburizing method suitable for an instillation type gas carburizing furnace, and belongs to the technical field of metal material heat treatment. According to the stage type carburizing method, the carburizing layer depth is divided, the heat preservation time is calculated section by section, and the total carburizing heat preservation time is obtained through accumulation, so that the carburizing depth accuracy can be achieved, and the carburizing layer depth uniformity is ensured; and meanwhile, carbon black accumulation and decarburization phenomena on the surface of the carburized product are avoided.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and relates to carburizing treatment of low-carbon alloy steel in a dripping gas carburizing furnace. Background technique [0002] According to the requirements of HB / Z 159-2001 "Carburizing and carbonitriding process of aviation steel", the drip-type gas carburizing regulations for low-carbon alloy steel are limited to the following points: [0003] 1. Carburizing temperature: The recommended carburizing temperature for carbon structural steel and alloy structural steel is 880℃~930℃; [0004] 2. Carburizing holding time: estimate according to Table 1; [0005] Table 1 Depth of infiltration layer and infiltration rate [0006] [0007] 3. Cooling method: After carburizing, it is generally air-cooled or cooled in a protective box. [0008] According to above requirement, prior art method is: [0009] 1) The temperature of the equipment is set at 920°C. After the t...

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Application Information

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IPC IPC(8): C23C8/22
CPCC23C8/22
Inventor 王铮王大宏孙先成王占鸿王维军张金卓南伟
Owner 大连长丰实业总公司
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