Rolling Metalworking of Hot Mill Rolls

• Customization: Available
• Weight: 50kg-10000kg
• Standard: Sn-200,SMS Group
• Material: 9cr1/9cr1V/35CrMo55cr/Steel 40/60crmn
• Hardness: 75-95
• Transport Package: Standard Seaworthy
• Specification: SG ROLL
• Trademark: Seawoo
• Origin: China
• Production Capacity: 10000

Product Description

Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, theyrecrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening. The starting material is usually large pieces of metal, like semi-finished casting products, such as slabs, blooms, and billets. If these products came from a continuous.casting operation the products are usually fed directly into the rolling mills at the proper temperature. In smaller operations the material starts at room temperature and must be heated. This is done in agas- or oil-fired soaking pit for larger workpieces and for smaller workpieces inductionheating is used. As the material is worked the temperature must be monitored to make sure it remains above the recrystallization temperature. To maintain a safety factor a finishing temperature is defined above the recrystallization temperature; this is usually 50 to 100 °C (122 to 212 °F) above the recrystallization temperature. If the temperature does drop below this temperature the material must be re-heated before more hot rolling.


Seawoo Roll assures high quality products through an extensive system of quality controls. A number of rigid inspections are carried out for each and every step in the process of our production line. Every set of inspection equipment has to go through high accuracy calibration to guarantee effectiveness of inspection data.
• Scrap and other raw materials are verified so that they meet stringent specifications.
• All melting parameters are analyzed.
• Casting parameters are documented.
• Heating parameters are monitored during the heat treatment process.
• Hardness and internal soundness are checked after the heat treatment process has been carried out.
• Dimensions and final hardness results are checked before shipment.
• An examination to detect freedom of surface and internal cracks is carried out before shipment.
• All results are documented in accordance with our Quality Management System.
 











 

Table.1 Physical Performances 

Symbol	Hardness	Hardness Uniformity	Depth of hardness	Size
9Cr2Mo	85-102 HSD	3HSD	8~15mm	¢200-600mm
MC3	85-102HSD	3HSD	15-30mm	¢200-1000mm
MC5	85-102HSD	3HSD	20-40mm	¢300-1000mm