TitleProduct

Tungsten Carbide Cold Roll Rings

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    Negotiable

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  • Total supply:

  • Delivery term:

    The date of payment from buyers deliver within days

  • seat:

    Hebei

  • Validity to:

    Long-term effective

  • Last update:

    2017-12-09 19:05

  • Browse the number:

    44

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Tengzhou Uni-Tech Co., Ltd.
Contactaixin:

Mr. Sheridan Dong(Mr.)  

Email:

telephone:

phone:

Arrea:

Hebei

Address:

Room No. 1004, Jinghe Middle Road, Xinxing Business Building, Tengzhou, China Skype: Shiming-Sd, Zaozhuang, Shandong, China 277500

Website:

http://tsweilang.bossile.com/

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Tungsten / Cemented Carbide Roll Rings
Tungsten carbide ring is a kind of tool material which consists of tungsten carbide and cobalt with high hardness and wear resistance. In order to make full use of these advantages, for example high wear resistance, long service life, high efficiency, you should pay attention to the followings:
1. You should select the appropriate rings to meet the rolling mills.
2. For installing the rings, you must be exactly according to the instructions. Any incorrect operation, for example, the fitting between ring and arbor or the spacer rings is too tight or too loose, may cause the roll failing to work. It is also very important to check if the rings confirm to the techinical requirems and clean the rings, arbor and spacer rings prior to rolling. It is strictly prohibited to hit the rings with hammer or other hard objects while assembling.
3. Cooling is intended to reduce the influence on roll rings thermal corrosion, fatigue and stress during milling . It can prevent the roll rings from cracking and slow down the diffusion of cracks, prolonging the life time of grooves. It plays an important role in optimizing the performances of roll rings. The reference data for cooling are as follows: The temperature of cooling water is below 25 C, pressure of cooling water is 5-6 bar with a water volume of 24-30m /hr/stand. The water is jetted in a radial direction and the angle between the water jet and the rotating direction of roll rings is 15-30 degrees. The width of the water column is 2 times that of the groove and the water should be jetted directly into the grooves and the water should not be scattering or misty.
Water quality requirement:
For YGH series PH 7.2 medium or weak alkali water ;
For YGR series PH 7.2 or PH 7.2 weak acid water ;
The content of solid particles in the water<15 milligram/litre .
4. Even in the perfect cooling condition, the fatigue crack will appear . To prevent it from growing, we need to re-machine the pass timely when the fatigue crack reaches 0.2mm deep. Otherwise,the growing crack may cause the roll breaking anytime.
The regular pass life is recommended 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 mill:(1800-2500)tons
5-6 Stands of finishing rolling mill:(1500-2000)tons
7-8 Stands of finishing rolling mill:(1500-2000)tons
9-10 Stands of finishing rolling mill:(600-1200)tons
Reducing Stands :(600-1200)tons. 
5. Repair of groove:
In order to remove the fatigue crack completely, we need to re-dress the pass deep enough. Actually, it is quite difficult and inconvenient to check if the fatigue crack is still there or not. Here are some suggestions of re-dressing for your reference:
Roll rings for 9-10 finishing stands: 0.4-0.6mm
Roll rings for 11-8 finishing stands: 0.7-1.2mm
Roll rings for pre-finishing stands: 1.2-2.0mm



Recommended Applications of Grades for Carbide Rings
Grade Recommended Applications
YGH10T The grooves have high thermal conductivity and wear resistance. 
It is mainly used for the last finishing stand. It can keep good shape and surface quality of wire rod.
At the same time we can improve the production efficiency by reducing the frequency for changing rings
YGH20T Moderate impact resistance and higher wear resistance,it is used for the last 1-3 stands of finishing mills.
YGH30T It has moderate wear resistance and impact resistance,suitable for general purpose. 
They are used for the most of the rear stands or all stands of finishing mills.
YGH40T The best general purpose,it has the good toughness and moderate wear resistance.
It is used for the most of the front, middle and rear stands of finishing mills.
YGH50T Good toughness and thermal crack resistance,it is used for 1-4 finishing stands
YGR60T Highest hardness and impact resistance, it is used for the pre-finishing stands.
YGH20  Highest hardness, best wear resistance in this series. 
Used in the last 1-2 stands of high speed finishing mills for common and hard steel bars.
YGH25 Higher wear resistance, moderate impact resistance in this series.
Used in the last 1-3 stands of high speed finishing mills for common and hard steel bars
YGH30 Moderate wear resistance and impact resistance, suitable for general purposes. 
Used in the last 1-4 stands or all stands of finishing mills.
YGH40  Best for general purposes, it is used in the front stands of good mills and the rear stands of common mills.
YGH45 Used in the first and second stands of finishing mills and pre-finishing stands. 
Also for every stand of rolling lines with low speed, less precision and unstable operation.
YGH55 Maximum binder content in YGH series, good toughness and thermal crack resistance.
Used in the stands of pre-finishing rolling mills and as hot rolled rebar steel rings.
YGR20 High wear resistance and corrosion resistance, it used in the last 1-2 finishing stands.
YGR25 High wear resistance and corrosion resistance, it used in the last 1-3 stands of finishing mills.
YGR30 Good toughness,wear resistance,corrosion resistance and thermal crack resistance,
It is used in the middle and rear stands of finishing stands.
YGR40 Good toughness and thermal crack resistance, suitable for general purposes. 
It is used in most stands of the finishing mills and in the rear stands of common mills.
YGR45 Good toughness and thermal crack resistance. It is used in the front stands of finishing mills.
YGR55 Good impact resistance, it is used in the stands of pre-finishing rolling mills,
 hot rolled rebar and they can be machined with turning and milling.
YGR60  Good impact resistance, it is used for hot rolled rebar steel and in the first, 
second stands of pre-finishing rolling mills.