Surface heat treatment process for hub unit
A surface heat treatment and wheel hub unit technology, which is applied in the surface heat treatment process of wheel hub units, can solve the problems of outdated means, high requirements, and difficulty in processing key components of automobiles, and achieves easy operation, low precision requirements, and cooling. good effect
Inactive Publication Date: 2018-12-21
HAINING NICE FLOURISH AUTO PARTS
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Problems solved by technology
However, the existing domestic surface heat treatment methods are outdated and cannot meet the characteristics of difficult and demanding processing of key components of automobiles, which has become an obstacle to the development of the domestic automobile industry. Therefore, we propose a surface heat treatment for wheel hub units. craft
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0019] A surface heat treatment process for a hub unit, comprising the steps of:
[0020] S1. Installation: put the hub unit parts into the medium frequency induction heater;
[0021] S2. Parameter setting: adopt the method of intermediate frequency heating, in which the rim adopts 8000 Hz, the depth of hardened layer is 1.3-2.5 mm; the spoke and bead seat adopts 2500 Hz, the depth of hardened layer is 2.4-4.1 mm, and the heating temperature is 900-950°C, the hardness of the hardened layer is HRC58-64;
[0022] S3. Quenching: energize the medium-frequency induction heater, use the induced current generated by the parts under the action of the high-frequency magnetic field and the action of the magnetic field in the conductor to cause self-heating to reach the heating temperature, and use multiple quenching, the interval time is 2-5S ;
[0023] S4. Cooling: After the parts are heated, the quenching water is sprayed to the heating surface through the small hole on the sensor, ...
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Abstract
The invention discloses a surface heat treatment process for a hub unit. The process comprises the following steps that: S1 installation: a hub unit part is put into a intermediate frequency inductionheater; S2, parameter setting: a medium frequency heating method is adopted, wherein 8000Hz is adopted for a rim; depth of a hardened layer is 1.3-2.5mm; and 2500Hz is adopted for a spoke and a beadseat, depth of a hardened layer is 2.4-4.1mm, heating temperature is 900-950 DEG C, and hardness of the hardened layer is HRC58-64. According to the surface heat treatment process for the hub unit, compared with other surface heat treatment processes, different parameters are set according to needs of different parts of a hub and effects to be achieved, so that the parts after the heat treatment effect have the expected process performance, mechanical properties, physical properties and chemical properties, and service life is improved. The inorganic quenching water concentrate is mixed and stirred with water in proportion to form quenching water. The quenching water is suitable for different alloy materials and has better cooling effect. The form of surface quenching process can adapt tothe surface induction quenching process of all shapes of parts, and has a low precision requirement.
Description
technical field [0001] The invention relates to the technical field of surface heat treatment of auto parts, and more specifically, relates to a surface heat treatment process of a hub unit. Background technique [0002] Key parts for automobiles, such as hub bearing units and car universal joint assemblies, are high-tech, high-value-added auto parts developed in recent years. It is a new economic growth point and development direction of the automobile manufacturing industry in recent years. In particular, there is a certain gap between domestic and international production standards and production methods of wheel hub units and automobile universal joint assemblies. The key to the manufacture of key components for automobiles is the most important key process; it is directly related to the comprehensive performance and service life of the main engine. However, the existing domestic surface heat treatment methods are outdated and cannot meet the characteristics of difficul...
Claims
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IPC IPC(8): C21D9/34C21D1/10
CPCC21D1/10C21D9/34Y02P10/25
Inventor 周叶平骆武杰
Owner HAINING NICE FLOURISH AUTO PARTS