Composite Cemented Carbide Roll Pros & Cons

1.Use of the cemented carbide roller

(1)Cemented carbide roller install online, cemented carbide roller workers should carefully check the roll cooling water pipes and location, and then received special pipes up from the introduction of the hose. Hose access interface must use lead wire tied tight, to prevent shedding, roll in the cooling water status and cause serious consequences.

(2)Roll rolling process, should pay close attention to the operation state of the bearing, abnormal immediately stop and check.

(3)In order to reduce fatigue cracks, the surface of the cooling cemented carbide roller ring must be washed with water to reduce the surface of the thermal expansion. When rolling contact with the roll torus ring of the roll surface temperature up to 500-600 ° C, cooling water sprayed into the hot cemented carbide roller ring surface, will form a layer of film covering the surface of the roll ring, seriously affect the cooling effect, research that, when cooling the pressure reaches 0.5 MPa or more, the gas film is broken, and thereby improve the cooling effect. Low-speed rolling mill roll ring cooling water pressure should not be too large, to prevent the cooling water splattered not achieve the cooling effect, should ensure that the cooling water pressure 3-4Mpa 40-50 cubic meters of water / hour. The same time, in order to improve the cooling effect, the cooling water cooling water nozzle spray coverage should be a corresponding coincidence, and the outlet should be aligned with the roll ring at the outlet of the cooling water column. Cemented carbide roller rings on the acidity of the water quality there are special requirements: PH ≥ 7.2 weakly alkaline and clean.

(4)Cemented carbide roller cooling water during use is an extremely important means to better cooling conditions, i.e. the cemented carbide roller rolling groove, the higher the tonnage, roll on the contrary is easy to burst. So, in the rolling process, each production shift every 4 hour check whether the mobile pipe cooling water pipe nozzle is blocked, then the car rolling.

(5)Shift changes, the operator should carefully check the wear of the rolling slot and produce a small crack, such as the above occurs, a member of the dispatch room Quality Supervision should be reported, confirmed and then replace cemented carbide roller rolling groove.

(6)In the rolling process, the roll gap adjustment shall be zero clearance; it can not touch cemented carbide roller rolling.
Sampling room, once the exception of rolled products, shall notify the control room, control room after receiving the notice, should be immediately stopped and checked. In case of cemented carbide roller the parent key block protruding screw loose, there was a slight crack in the rolling groove in need of replacement rolling groove and cemented carbide roller.

(7)ф5-ф8 wire recommends the Single Slot rated rolling tonnage 800-1000 tons. Single Slot rolling tonnage can not be over-tonnage, higher than the imposed or surface micro-cracks will cause the roller ring crack, even if it does not crack can also cause cemented carbide roller ring grinding capacity, resulting in uneconomical.

Application in the Wire Rod Mill Composite Cemented Carbide Roller

2.Application of the advantages and disadvantages of the composite cemented carbide roller in the wire rod mill
Cemented carbide roller rings with high hardness, good abrasion resistance on the wire rod mill reflects the following advantages:

(1) improve the quality of steel products, the steel surface quality and tolerances been completely resolved, negative deviation control is very precise;

(2) reduce to change the tank, the roll changing times and downtime, and increase mill capacity utilization and production, the mill at the same time create greater economic benefits;

(3) to reduce the rejection rate, reduce the labor intensity of production workshop;

(4) reduce production costs, increasing efficiency of enterprises;

(5) in favor of endless rolling technology applications.

The disadvantages are: cemented carbide roller rings high hardness, brittleness, high sensitivity to crack, resulting in the maintenance more difficult, in the use of cooling water requirements, and can not withstand thermal shock, otherwise easily lead to destructive accidents.

Chinatungsten Online can provide various sizes and grades of cemented carbide products,deep processing and mold design and production , non-standard products can also be customized according to customer requirements. Welcome to consult and purchase sales@chinatungsten.com, sales@xiamentungsten.com .