In the operation of the roller to send pellets and concentrate dust on the site, the belt is adhered to the granular material, the steel pipe roller is less than a month to be broken off, bearings often occur phenomenon.
Now the roller frequent damage, the most serious more than and 20 days on the grinding. The roller on the steel belt conveyor can not be used for 3 months. So what is the reason? Here to share with you, as follows:
Most of the roller damage phenomenon is that after the bearing damage or lead to the roller bearing seat and the tube body, the wall wear.
In the operation of roller, the sintering temperature is higher, and there is a large amount of water vapor in the drop point of the belt conveyor, and the sinter material with good viscosity is large, and some positions are missing. Most of the roller damage phenomenon is that after the bearing damage or lead to the roller bearing seat and the tube body, the wall wear. Manufacturers pointed out that the general service life of about 2 months, the shortest only 15 days, the longest of the 6 months.
Roller seal; local surface modification technology. The heat sources are laser, electron beam, ion beam, electric spark, high frequency induction shock, solar energy and synchrotron radiation. Improve the fatigue strength of the workpiece.
1 high energy beam heat treatment residual stress in metal. Thus heating speed, cooling speed is also fast.
2 high energy beam heating is non-contact heating. The heat affected zone is very small; the heating and cooling rate of the high energy beam is very fast, the thermal stress is very small, so the deformation of the workpiece is small. The growth of austenite and the diffusion of carbon and alloy atoms are inhibited.
3 because of the rapid heating. Overview of finer and super fine structure. Due to the small area of high energy beam.
4 high energy beam heat treatment depends on the workpiece itself cooling quenching. The heat capacity of the metal is sufficient to quench the processed profile, to ensure the completion of the martensitic transformation, and to obtain the crystalline martensite. It can also inhibit the precipitation of carbides and reduce the influence of brittle phase. |
