Well-designed Backup Roll - TC roll rings products for steel rolling mill machinery – Jinyehong

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Well-designed Backup Roll - TC roll rings products for steel rolling mill machinery – Jinyehong Detail:

Product Introduction

cemented carbide roll rings (also known as tungsten carbide roll ring) possesses good thermal conduction property. Compared with other materials,it is much better in terms of heat-resistance, wear-resistance and strength. What ’s more,its hardness reduces a little under the condition of high temperature. So, the cemented carbide roll rings is invented with the ap-pearance of high speed wire rod mill.With the development and improvement, it is widely applied in the production of high speed wire, bar and deformed steel bar.

As far as the material for our products,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-) x106J/ m’respectively.Its hardness and wear resistance come from tungsten carbide (Wc) while the toughness and strength depend on the binding agent (Co-Ni-Cr).At present, the finishing mill is generally 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. At present,the finishing mill is generally 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. we shall pay more attention to the wear-resistance and thermal fatigue resistance of roll rings.

Description of Tc Ring

2121

Rang of O.D.(mm)	Rang of l.D.(mm)	Rang of height(mm)
145-450	87-280	62-150

Tungsten carbide roll

Range of outer diameter: 154-450mm

Range of inner diameter: 87-280mm

Range of height: 62-150mm

Table of Specification of Finished Rolls

Tolerances allowable for the O.D.,I.D, and Height of roll rings(mm)
TYPE	OD≤200 mm		OD > 200mm
TYPE	Better Grade	Normal Grade	Better Grade	Normal Grade
Tolerance of OD	±0.020	±0.050	±0.030	±0.050
Tolerance of ID	+0.020 0	+0.035 0	+0.025 0	+0.050 0
Tolerance of H	±0.025	±0.100	±0.050	±0.100

Main Grade for TC metal seal mechanical face ring with high density
Grade	Density (g/cm³)	Hardness (HRA)	T.R.S(Mpa)	Application Recommended
YG4C	15	89.5	1800	Mainly used as small buttons for percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations.
YG6	15.8	89.5	1700	Mainly used as the buttons of small and medium-sized percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations.
YG8	14.7	88.5	2300	Mainly used as the buttons of small and medium-sized percussion bits and as the inserts of rotary prospecting bits to cut soft, medium-hard formations.
YG13C	14.3	86	2500	Mainly used as the inserts and buttons of tricone bits rotary-percussive bits and heavy rock drill bits to cut medium-hard and hard formations.
YG15	14	86.5	2500	It is stronger, and is mainly used as the inserts and buttons of rotary-percussive bits, heavy rock drill bits to cut hard and very hard formations.v

Packing & Delivery

212 (1)
212 (7)
212-1

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