Annealing heat treatment (1)

Source: China Bearing Network Time: 2014-10-31

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

There are several types of bearing steel annealing: dispersion annealing, stress relief annealing and spheroidizing annealing. The annealing of bearing ring forgings should use spheroidizing annealing. Spheroidizing annealing makes the arrangement into uniform dispersed fine-grained pearlite; Supply the best original arrangement, improve plasticity; reduce hardness; facilitate cutting.
1. The effect of pearlite shape and size distribution on function Pearlite is a mixture of ferrite and cementite; its carbon content is 0.8%. If the cementite in the pearlite exists in the form of flakes; Pearlite. After the spheroidal pearlite is spheroidized and annealed; the cementite is spherical; this is called spherical pearlite. The annealing of GCr15 bearing steel is to obtain this spherical pearlite arrangement, and the requirement is fine and uniform. The effect of the fine-grained, pearlite shape and the fine-grained dispersion on the processing function can be discussed from the following conditions:
(1) Uniform fine-grained pearlite; heat treatment temperature ratio is wider than coarse-grained, flake-like, and coarse-grained pearlite; temperature is simple to control, and plasticity is good; cutting resistance. Xing Xingyong.
(2) Uniformly dispersed granular pearlite suitable for scale; provides excellent arrangement for quenching in the future; makes the quenching temperature wide; the martensite arrangement after quenching is fine and uniform; it is not easy to overheat and soft spots 2. Make an outstanding foundation for the quality of the progressive bearing.
(3) If the original arrangement before quenching is coarse-grained, flake-like and coarse-grained pearlite; its superheat sensitivity is high; heating temperature is difficult to handle; uneven arrangement after quenching; easy deformation and cracking of workpiece; mechanical function Low quality, other; flaky pearlite hardness is higher than spherical pearlite; poor plasticity; large cutting resistance; cutting is not easy to separate; increase the roughness R _{a of the} processing surface. The machining accuracy of the parts is difficult to ensure; The original arrangement must be re-annealed after normalizing.

Recommend to friends comments close window

Bearing related knowledge

NSK bearing clearance method ball mill bearing sliding change tumbling energy saving efficiency high bearing knowledge Daquan (a)
High quality tapered roller bearing 32017X
Common methods for checking whether SKF bearing grease can be transformed

This article links to http://
Please indicate the bearing network http://

Previous: FAG bearing reachable life Lna, Lhna and coefficient a23
Next: Rolling bearing vocabulary (4)

Laminate Lighting

A laminate lighting system is a special lighting technology used to provide lighting effects for display and display devices such as laminates and display cabinets. Laminates are usually made of transparent or translucent materials, such as glass, acrylic, etc., to display products or items.

Laminate lighting By installing lamps under or on the side of the laminate, the light shines directly onto the laminate, achieving the highlight of the display items and creating an attractive effect. Common lighting methods include:

Laminate backlight lighting: The light is installed behind the laminate, and through the transparency of the laminate, the item shows a bright and uniform effect under the illumination of the light. In this way, the display items can look more vivid and eye-catching.

Laminate sidelight lighting: The light is installed on the side of the laminate, so that the light comes in from the side, through the refraction and reflection of the laminate, evenly illuminating the display items. In this way, the texture and details of the item can be highlighted, enhancing its attractiveness.

Laminate point lighting: The use of small, high-brightness lamps to focus the light on a specific location to highlight the focus or specific part of the display item. This is often used to highlight a product or specific detail to create a unique visual effect.

Laminate lighting technology can be applied to various scenarios, such as shopping malls, museums, exhibitions, stores, etc., for displaying jewelry, watches, artwork, merchandise, and other items. It can not only enhance the ornamental and attractive of the display items but also improve the overall effect of the display environment and enhance the beauty and experience of the space.

Laminate Lighting System,Laminate Backlight Lighting,Laminate Sidelight Lighting,Laminate Point Lighting,Laminate Lighting Technology

SHENZHEN LITEHOME OPTOELECTRONIC TECHNOLOGY CO., LTD. , https://www.litehomelights.com