High Alloyed Cr3~Cr5 Steel Back-up Roll for Cold Rolling Mills

• Customization: Available
• After-sales Service: 24 Hours
• Warranty: 1-3 Years
• Model NO.: FBUR
• Customized: Customized
• Condition: New
• Power Source: Electric
• Automatic Grade: Automatic
• Type: Four-Roll Cold Mill
• Certification: ISO
• Transport Package: Steel Pallets
• Specification: 700kgs-13tons
• Trademark: TSR Rolls
• Origin: China
• HS Code: 84553000
• Production Capacity: 30000tons/Year

Product Description

High Alloyed Cr3~Cr5 Steel Back-up Roll for Cold rolling mills

Chemical Composition & Property

aterial	Chemical Composition
	C	Si	Mn	Cr	Ni	Mo	V	P	S
3%Cr Series	0.4-0.8	0.3-0.7	0.4-0.8	4.5-5.5	0.2-0.8	0.3-0.8	<0.25	≤0.015	≤0.015
5%Cr Series	0.4-0.65	0.2-0.6	0.4-0.8	2.0-3.0	0.2-0.8	0.3-0.7	<0.25	≤0.015	≤0.015

 

Material	Tensile Property     Mpa	Barrel Hardness HSD	Working Layer Composition	Hardening Depth mm	Roller Application
3%Cr Series	≥880	50-65	Martensite  (bainite) + Carbide	40-60	Single stand mill, Cold & Hot rolling tandem mill
5%Cr Series	≥950	55-80	Martensite  (bainite) + Carbide	50-100	Single stand mill, Cold & Hot rolling tandem mill

Maximum product dimensions

Maximum product dimensions	Work rolls	Back-up rolls
Total length	6000 mm	6500 mm
Body length	3500 mm	2500 mm
Diameter	910 mm	1500 mm
Hardening depth (Single side)	50 mm	100 mm
Maximum product weight	13000 kg	50000 kg
Capacity (ton/year)	8000	1000

TECHNOLOGY

VC + ESR

VC casting is carried out under vacuum in a vacuum degassing unit.

• Dissolved Hydrogen is controlled to 1.0-1.5 ppm.
• To minimise gas pickup (oxygen and hydrogen).
• Clean ingot.
• Homogeneous and refining microstructure.
• ESR roll has the advantages of high wear-resistance, high anti-accident and high uniformity of surface hardness.
• We TSR rolls, Only provide ESR roll for customers.

 FORGING   

• Typical forging reductions for work rolls is 3:1, to avoild the loose structure defect,optimize the microstructure.
• Forged Rod Blanks Standard GB/T15547-2012.

QUENCHING AND MACHINE

• Automatic control induction heating power, stable quenching heating temperature.
• Quenching by Constant temperature cooling water, steady quenching cooling intensity.
• Multi-heating induction rings design to ensure the heating depth and meet the customer 's Working Layer requirements.    

    

TSR Roll has a machining shop of more than 15.000 square meters, including the lathe, boring machine, grinding machine and other modern processing equipment for rolls. Thanks for the first-class operator working on high-precision CNC equipment, it is easy to produce the rolls with various kinds of grooves and precise tolerances.

• CK61160 CNC Lathe, Maximum capacity: 32T
• MK84200 CNC Grinding machine, Maximum capacity: 50T
• C9125*6/63 Turing and Boring machine, Maximum capacity: 63T
• T6920D Boring machine

    

TEMPERATURE DIFFERENTIAL HEAT TREATMENT FOR BUR

• The temperature uniformity of furnace is improved by using multi-point layout of small power burner.
• Multi-infrared  pyrometers automatically measure body temperature and adjusts intensity of the burner according to temperature difference.
• The quality of  working layer can be ensured.

    

QUALITY ASSURANCE  

The high performance requirements of today's mills require reliable rolls capable of remaining in the production cycle longer than ever while still assuring a high quality of the rolled products. TSR Rolls has built a consistent quality control throughout the manufacturing process. Our aim is supplying the customer with reliable rolls capable to perform better, contributing to customer benefit, cost reduction and satisfaction.

Since the beginning TSR Rolls obtained the ISO 9001:2008 Quality Management System Certification. Based on our consistent adherence to the quality management, TS Roll products quality has been universally acclaimed by dozens of customers worldwide.

• Emission Spectrometer ARL - 3460; Two sets
• Carbon & Sulphur Analyzer CS-80
• Hydrogen & Oxygen Analyzers
• Thermal Analyzer
• Hardness Testers (Portable and Laboratory sets)
• Ultrasonic Testing Equipments (Several units)
• Material Testing Machine WAW-600
• Charpy Impact Test Machine JSB-300

    
SERVICE AND SUPPORT

At TSR Roll, we are focused on the roll service. Our Technical Service will help you to solve questions about roll maintenance, roll wear, roll damages, roll configuration, shape of the roll, surface hardness, roughness, temperature distribution and damage inspection among others. The aim is reducing the Total Cost of Operation for the customer by supplying reliable rolls and advanced roll service always with strict adherence to the delivery time.

Distribution of Customers & Service Center