The cementer carbide ring roller widely applied in the production of highspeed wire,bar and deformed steel bar.
As far as the material for our cemented carbide roll rings , there are two series as Wc-Co and Wc-Co-NI-Cr which possess the good compre-hensive mechanical properties. The bending strength and impact toughness reach 2200 Mpa and ( 4-6)×106J m’2 respectvely. Its hardness and wear resistance come from tungsten carbide (We) while the toughness and strength depend on the bindingagent (Co-Ni-Cr).
Product name:Three dimensional carbide rolls tor cold rolling ot ribbed steel bars
Product Advantage: The primary rolingtonnageare 600-2000tons，which is 20-30 times more than that of common tool steelrolls.
Packing Details : Wooden box with fumigation or Wooden Fram
Delivery Details: 30~60 days or Based on the quantity
Shipping: Sea freight、Land freight、Air freight
Customized logo(Min. Order 1 piece)
Customized packaging(Min. Order 1 piece)
Graphic customization(Min. Order 1 piece)
Checking report: Material Report、Hardness Report、UT/MT Report、Dimensions checking report、Mechanical Property Test Report
|Process schedule with ETD date||√|
|QC checking of each process||√|
|Photos &videos of each process||√|
|ISO 9001 certificate||√|
|The third party Checking||√|
The cemented carbide roll rings widely applied in the production of high speed wire, bar and deformed steel bar.
At present, the finishing mill is genierally composed of 8-10 stands. Because of the big size of fracture surface of rolled part,the collar on the front stands of finishing mill may resist heavy duty and strong impact. Thus, the high hardness and good thermal fatigue resistance are the primary factors, which are prior to wear-resistance.While there is low load and impact for therear stands, we shall pay more attention to the wear-resistance and thermal fatigue resistance of roll rings.
It can be seen from the metallographic photos that the metallographic structure of the Cementer carbide roll is much better than other materials in terms of the shape, quantity, size and distribution of carbides, as well as the matrix structure and grain size..
During the use of cemented carbide roll ring, under good cooling conditions, a thin and dense oxide film is formed on the surface of the roll body. This uniform, thin and dense oxide film can exist for a long time without falling off, so that the wear resistance of the high-speed steel roll is significantly improved.
Product design→ Roll blank design→ Roll blank manufacturing→ Roll blank acceptance→ Annealing→ Rough turning→ Ultrasonic flaw detection→ High temperature quenching→ Low temperature tempering→ Ultrasonic flaw detection→ Finishing→ Ultrasonic flaw detection→ Roll body grinding→ Roll numbering→ Inspection→ Cleaning → Packing → Shipping → Warehousing → Inspection → Use and Maintenance → On-site Communication → Design Improvement.
As can be seen from the flow chart, roll manufacturing forms a closed-loop system from product design, production and manufacturing, use and maintenance, and improved design, and the quality of rolls is constantly improving.
Design specifications and standards for manufacturing, quality control and inspection
The relevant standards of the roller ring are as follows:
Before determining the grade of cemented carbide for every stand, we shall have a thorough understand about theirproperties so as to make the correct choice (Please refer to the Product manual).
The sleeve insertion and assmbly of cemented carbide roll rings shall be carried out in accordance with the requirementsof precision. There shall be appropriate space between the roll rings and axle or between the roll rings and sleeve. The fit is neither tight nor loose. You should check whether the roll rings contorms to the technological requirement and cleanthe mounting surface of roll rings, sleeve and axle before the installation. it is prohibited to beat the roll rings with hammeror other hard things while assemblying.
For YGH series medium or weak alkali water of PH>7.2
YGRFor YGR series or PH<7.2 weak acid water of PH>7.2
The content of solid particles in the water<15 milligram/L
lt is inevitable to find the microcrack on the rolling groove. The microcrack will gradually extend, stretch and deepen. The groove shall be repaired immediately while the depth of crack reaching 0.2-0.4mm. Otherwise, the crack will deepen quickly, which leads to a risk of broken roller. The range of normal yield is reguated as follows:
Stands of pre-finishing rolling mill: (3500-4000)tons
1-2 Stands of finishing rolling mill: (1800-2500)tons
3-4 Stands of finishing rolling mith(1800-2500)tons
5-6 Stands of finishing rolling mill: (1500-2000)tons
7-8 Stands of finishing rolling mill: (1500-2000)tons
9-10Stands of finishing rolling mill: (1200-1500)tons减
Stands for reducing diameters: (800-1200)tons
lt is normal to find the microcrack on the rolling groove. The groove shall be repaired immediately while the depth of crack reaching 0.2 mm. lt is necessary to prevent the roller from being broken. While repairing, we must ensure to remove the crack thoroughly. Otherwise, it will bring a potential risk to next rolling.It is difficult and inconvenient to check if the surface is polishing. To ensure the complete remove of microcrack, we can increase the grinding quantity. Under thenormal condition, the repair is controlled in the range of:
Roll rings for stands 9-10 of finishing rolling mill(0.4-0.6)mm
Roll rings for stands 1-8 of finishing roiling mill(0.7-1.2)mm
Roll rings for s~nds of pre-finishing rolling mill(1.2——2.0)mm
KOCKS- roller ring
Roll rings for high speed rolling of ribbed steel bars
Composite cemented carbide roll rings
Cemented carbide composite roll
We can provide characteristic service and differentiated products according to the different conditions of rolling mill.
Professional engineers provide solutions and technical drawings
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