Here is a bearing temperature standard, please check it
Here is a bearing temperature standard, please check it
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The quality of bearing steel and metallurgical performance requirements
by：Waxing
2020-09-17
In order to meet the requirements of the above on the performance of the dynamic bearing, the bearing performance of steel materials is put forward the following some basic requirements: 1)
High contact fatigue strength, 2)
Should have high hardness after heat treatment or can satisfy the requirement of bearing performance of hardness, 3)
High wear resistance, low friction coefficient, 4)
High elastic limit, 5)
Good impact toughness and fracture toughness, 6)
Good dimensional stability, 7)
Good rust resistance, 8)
Good cold and hot working performance.
According to the above basic requirements for bearing steel, the quality of bearing steel metallurgy puts forward the basic requirement of the following;
(1) the chemical composition of strict requirements;
(2) the high dimension accuracy requirement, for use in the upset forging of hot rolled out a burning stick, should have a higher request for the size accuracy;
(3) special strict purity requirements;
(4) strict macrostructure and microstructure,
At high magnification)
Organization requirements;
(5) special strict surface flaws and internal requirements: including surface crack surface defect, surface slag, burr, folding, scarring, scale, etc. ;
Internal defects including shrinkage cavity, bubbles, white spots, burnt, severe osteoporosis and segregation, micro pore, etc;
6 strict carbide inhomogeneity requirements;
All landowners surface decarburization layer depth of the strict requirements;
Today other requirements: such as bearing steel smelting method, hardness, fracture, oxygen content and annealing residual elements, spark test, delivery status, etc.
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