How to replace linear guides and slides in motors?
How to replace linear guides and slides in motors?
PRODUCT
Large carburizing bearing parts
by：Waxing
2020-11-14
For large carburizing bearing parts, the composition of carbonitriding layer and the organization and its change in grinding decided the fracture strength of high and low, improper grinding technology in grinding process,
Such as grinding too fierce, poor cooling, etc. )
When local heat will cause bearing inner ring outer surface, the secondary hardening or high temperature tempering burns;
The heat organization greatly reduces the fracture strength of materials and material surface under the action of grinding stress and organization stress, crack.
In the process of subsequent use, bearing crack extensions, lead to appear this kind of situation.
Therefore, improper grinding former improper control of heat treatment process and grinding technology is the main cause of crack formation.
General to martensite, carbides and residual austenite control: (
1)
Martensite structure must be small, because the gross martensite brittle is larger, even there is a lot of microcrack, the organization is easy to produce grinding crack;
(
2)
Strictly control the level of carbide, carbide is brittle phase because it is over, the fracture resistance, low thermal conductivity, poor ability of risk control level of carbide can greatly reduce refined crack;
(
3)
Less residual austenite, the thermal conductivity of the residual austenite is only half of martensite, residual austenite volume, the more the greater the thermal stress in the process of grinding, grinding crack tendency also will increase.
The analysis of bearing inner ring surface microstructure exists in large carbide and serious carbide network;
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