Forged Steel Rolls for cold rolling mill (3%Cr & 5%Cr)
Chemical Composition & Property
| Material | Chemical Composition | ||||||||
| C | Si | Mn | Cr | Ni | Mo | V | P | S | |
| 3%Cr Series | 0.75-0.95 | 0.2-0.9 | 0.2-0.6 | 2.5-3.2 | 0.2-0.8 | 0.2-0.6 | <0.25 | ≤0.02 | ≤0.015 |
| 5%Cr Series | 0.7-0.95 | 0.2-0.9 | 0.2-0.6 | 4.5-5.4 | 0.1-0.8 | 0.1-0.6 | <0.25 | ≤0.02 | ≤0.015 |
| Material | Tensile Property Mpa | Barrel Hardness HSD | Working Layer Composition | Hardening Depth mm | Roller Application |
| 3%Cr Series | ≥850 | 88-100 | Martensite+M3C (few M7C) and Ar | 20-28 | Single stand mill, skin pass mill, tandem mill |
| 5%Cr Series | ≥950 | 90-100 | Martensite+M7C and few Ar | 30-50 | Single stand mill, skin pass mill, tandem mill |
Maximum Product Dimension
| 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 MACHINEAutomatic 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: 32TMK84200 CNC Grinding machine, Maximum capacity: 50TC9125*6/63 Turing and Boring machine, Maximum capacity: 63TT6920D Boring machine
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 setsCarbon & Sulphur Analyzer CS-80Hydrogen & Oxygen AnalyzersThermal AnalyzerHardness Testers (Portable and Laboratory sets)Ultrasonic Testing Equipments (Several units)Material Testing Machine WAW-600Charpy 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.
