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The material factors affecting the life of roller parts
Clicks:18357 Date:5-6
The material factors affecting the life of roller parts, austenite of high carbon chromium steel after quenching by normal, can contain 8%~20%Ar (residual austenite). Yanshan Mingschin conveying machinery manufacturing Co., Ltd. is a specialized production roller parts enterprises, mainly the production and supply of roller bearings, roller parts, KA bearings, 0 types of deep groove ball bearings, bearing agent manufacturers, low noise motor bearings, bearings and set off running in period.
Roller parts in Ar has its advantages and disadvantages, in order to promote, the content of Ar should be appropriate. Because the amount of Ar is mainly related to the condition of quenching and heating, the amount of Ar will affect the amount of carbon in the quenched martensite and the amount of undissolved carbide, and it is difficult to reflect the influence of the amount of mechanical properties. For this reason, the fixed austenite condition was used to obtain the different Ar amount by using the method of thermal stabilization of austenite. The effect of Ar content on the hardness and contact fatigue life of GCr15 steel after quenching was studied. In the actual operation, the supporting parts of the roller assembly of the Ming Xin conveying machine have the important advantage and the performance, the internal content and the ingredient can have the different function, in the use according to the certain standard.
With the increase of austenite content, hardness and contact fatigue life was increased, and then decreased after reaching the peak, but the peak value of Ar content of different hardness peak appeared at about 17%Ar, and the contact fatigue life of the peak at around 9%. When the test load is reduced, the influence of Ar on the contact fatigue life decreases. This is because when the amount of Ar has little effect on the strength reduction, the effect of toughening is obvious. Support and cause some defects and fittings for use in a manner that is at a low load, Ar had small amount of deformation, which reduce the stress peak, and the Ar processing has been strengthened and deformation stress strain induced martensite transformation and strengthening. However, when the load is large, the larger plastic deformation of Ar and the matrix will produce stress concentration and rupture, which will reduce the life. It should be noted that the beneficial effect of Ar must be in the Ar stable state, if the spontaneous transformation of martensite, the toughness of the steel will be reduced and brittle.
Roller accessories in the elements and content for the use of the advantages and disadvantages, for use in accordance with certain standards and forms of use.
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