Dual durometer sprockets
A double-hardness, sprocket technology, applied in furnace types, furnaces, heat treatment furnaces, etc., can solve problems such as poor wear resistance of sprockets, production impact, and increased maintenance costs, achieving low cost, simple process, and high product quality Effect
Active Publication Date: 2016-03-16
JIANGSU WANDA SPECIAL BEARING CO LTD
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Problems solved by technology
[0002] Existing various metal sprockets need to be mechanically processed after casting, so the hardness of the working surface should not be too high. Generally, heat treatment is not carried out after processing. This kind of sprocket has poor wear resistance and needs to be replaced frequently, which not only increases Maintenance costs are reduced, and it also has a direct impact on production
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[0020] The substantive content of the present invention will be further described below in conjunction with accompanying drawing:
[0021] As shown in the figure, one is a double-hardness sprocket. The present invention adopts a heat treatment method of twice quenching. The double-hardness sprocket includes a sprocket groove 1 and a sprocket raceway 2. This heat treatment process is mainly aimed at bearing steel made of GCr15. The manufactured sprocket adopts a secondary heat treatment process on the sprocket raceway to improve the hardness of the raceway.
[0022] The specific heat treatment process consists of the following steps:
[0023] The first is the initial quenching, the overall heat treatment, through the diffusion of carbon into the steel matrix, to provide the overall hardness, the outer ring of the bearing part is quenched in the heating furnace for the first time, the temperature is controlled at about 850 ° C, the holding time is about 2 hours, and the cooling ...
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Abstract
The invention discloses a double-hardness sprocket wheel and belongs to the field of machine manufacture. The double-hardness sprocket wheel is manufactured by using a secondary heat treatment technology, and the hardness of the sprocket wheel raceway is HRC58, and the hardness of the sprocket wheel groove is HRC40, and the sprocket wheel roller patch is treated by a partial secondary heat treatment, and the material of the double-hardness sprocket wheel is GCr15 bearing steel, and the material of the double-hardness sprocket wheel is Gcr15 bearing steel. The treatment employs a secondary quenching method, and the heat treatment technology comprises the following step: integral heat treatment, induction heat treatment and tempering for stabilization of structure, which can improve intensity of main bearing wear surface roller patch of the sprocket wheel; the heat treatment for partial roller path is carried out, which improves crack resistance intensity of the wear surface and the rolling contact fatigue life. The invention has the advantages of high quality, simple process and low cost, etc.
Description
technical field [0001] The invention relates to a sprocket manufacturing process, in particular, the invention relates to a double-hardness sprocket manufacturing process. Background technique [0002] Existing various metal sprockets need to be mechanically processed after casting, so the hardness of the working surface should not be too high. Generally, heat treatment is not carried out after processing. This kind of sprocket has poor wear resistance and needs to be replaced frequently, which not only increases In addition to maintenance costs, it also has a direct impact on production. The hardness of the working surface of the existing sprocket is the same as that of the sprocket groove. In order to avoid damaging the chain due to friction of the sprocket, it is necessary to reduce the hardness of the sprocket groove to improve the service life of the chain. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the ...
Claims
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IPC IPC(8): C21D9/32C21D1/42
CPCY02P10/25
Inventor 陈宝国朱晓宏时飞石静静王勇
Owner JIANGSU WANDA SPECIAL BEARING CO LTD