Detail on the technology of the bearing material

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SKF rolling bearings early failure of the main rupture, deformation, wear, corrosion and fatigue under normal conditions, the contact fatigue. The failure of the bearing parts In addition to the conditions of service, mainly due to the hardness, strength, toughness, wear resistance, corrosion resistance and within.FAG bearing

The stress state constraints.
Bearing parts quenched back to

To make the bearing parts quenched surface residual large compressive stress after tempering, quenching the pass into the atmosphere of carburizing or nitriding, short-term surface carburizing or nitriding. Due to heating of the steel quenching austenite actual carbon content is not high, far below the phase diagram is shown in the balance.double row bearing

Concentration, so you can suck carbon (or nitrogen). Austenite containing carbon or nitrogen, its Ms lower surface than the inner and center quenching martensite transformation occurs, resulting in a larger residual stress.

The carbon content of the quenched martensite

When the original organizatio n in the steel when quenched martensite carbon content (ie, quenching the austenite carbon content), the amount of retained austenite and undissolved carbides depends on the quenching temperature and hold time as the quenching temperature is increased (time certain), steel.screw bearings

Undissolved carbides reduce the number of (quenched martensite carbon content increases), the increase in the number of retained austenite, the hardness increased with the increase of quenching temperature and the peak and then decrease with increasing temperature.

Impurity content of the steel


Impurities in the steel, including the content of nonmetallic inclusions and harmful elements (acid), steel performance hazards are often mutually reinforcing, such as higher oxygen content, oxide inclusions in the more. The influence of impurities on the mechanical properties and parts anti-failure c apacity and type of impurities in the steel

, Nature, quantity, size and the shape, but usually have to reduce the role of toughness, ductility and fatigue life.