Small conical bearing heat treatment method
A heat treatment method and tapered bearing technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of low impact resistance, low bearing fatigue life, and inability to adapt to high wear resistance, etc., to achieve refined surface structure, high The effect of surface hardness
Active Publication Date: 2020-04-17
WAFANGDIAN BEARING GRP STATE BEARING ENG TECH RES CENT CO LTD
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Problems solved by technology
[0002] Ordinary small tapered bearings generally use high-carbon bearing steel as raw material for ordinary heating and quenching, but the disadvantage is that the hardness is generally around 60HRC, which cannot meet the requirements of high wear resistance. The structure formed after ordinary heating and quenching is basically tensile stress, and it is not resistant to Shock, often bearing fatigue life is not high
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[0017] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0018] See attached figure 1 , a heat treatment method for small tapered bearings, using carburized steel as the raw material, innovatively using 20Cr steel as the raw material, which not only controls the hardenability of the heat treatment process but also reduces the cost of raw materials.
[0019] 1. Process method
[0020] 1) For tapered bearings with a large wall thickness difference, the thickest part is 10mm, and the thinnest part is 2mm, in order to ensure that the thinnest part does not penetrate, the present invention strictly controls the carburizing speed of the first part of the carburizing process, and adopts low temperature and low carbon potential to ensure the second A gentle carbon ...
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The invention discloses a small conical bearing heat treatment method, and belongs to the field of bearing heat treatment. The heat treatment method of the small conical bearing is mainly applied to occasions with severe working conditions and requirements for high wear resistance, long service life and light weight. A bearing ring is made of carburized steel, and the bearing ring is subjected totapping air cooling after being subjected to primary carburization, then subjected to secondary carburization, tempered after being subjected to tapping salt bath quenching and finally subjected to air cooling to the room temperature. According to the method, carburizing steel is used as a raw material, and the surface structure of the bearing is refined through two carburizing processes and a cooling process, so that the bearing obtains relatively high surface hardness which can basically reach 65 HRC or above.
Description
technical field [0001] The invention belongs to the field of heat treatment of bearings, and is mainly applied to the heat treatment method of small-sized tapered bearings in application occasions requiring high wear resistance, long service life and light weight due to harsh working conditions. Background technique [0002] Ordinary small tapered bearings generally use high-carbon bearing steel as raw material for ordinary heating and quenching, but the disadvantage is that the hardness is generally around 60HRC, which cannot meet the requirements of high wear resistance. The structure formed after ordinary heating and quenching is basically tensile stress, and it is not resistant to Impact, often bearing fatigue life is not high. Contents of the invention [0003] According to the above-mentioned defects in the prior art, the object of the present invention is to provide a heat treatment method for small-sized tapered bearings with an outer diameter of 60 mm or less, whi...
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IPC IPC(8): C23C8/22C21D9/40
CPCC23C8/22C21D9/40
Inventor 姜乐温博唐虎娇孙洪斌
Owner WAFANGDIAN BEARING GRP STATE BEARING ENG TECH RES CENT CO LTD