Customized Hsd 75-85 High Chrome Cast Iron Roll with High Hardness for Middle Stand of Hot Strip

• 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

The micro structure of HSS roll shows fine and diffuse carbide of MC and M6C embedded in the Martensite. The performance of wear resistance, thermal hardness and thermal fatigue resistance of HSS roll is excellent.
HSS rolls have high hardness and good wear resistance at high temperature. These rolls are manufactured by Centrifugal Casting(CC) method and the roll core is filled with spheroidal graphite cast iron.The adequate chemical composition control and proper heat treatment ensures the hardness of roll working layer to reach as high as 80-85HSC. Uniformly distributed complex carbides of Vanadium,Tungsten,Niobium and Molybdenum in the martensitic matrix ensures uniform hardness of working layer and uniform wear out in the roll passes.These types of rolls are used for finishing stands to increase productivity and improve surface quality of rolled piece.

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 Chemical Composition %

Symbol	C	Si	Mn	W	V	Cr	Ni	Mo
HSS	1.50-2.20	0.30-1.0	0.40-120	0.00-8.00	2.00-9.00	3.00-8.00	0.00-1.50	2.00-8.00
S-HSS	0.60-1.20	0.80-1.50	0.50-1.00	0.00-3.00	0.40-3.00	3.00-9.00	0.20-1.20	2.00-5.00

Table.2 Prosperities & Application

	Neck Hardness HS	Barrel Hardness HS	Size	Weight	Application
	30-45	75-95	¢300~700	800`15000	Finishing work rolls for hot strip mills and bar mills