Duplex Cast Steel Back-up Rolls


Texture profile

Composite steel back-up roll bimetallic composite casting process to produce a full flush, the outer layer of high Cr content of 3-5% steel, mild steel core has good strength and toughness. Special casting process to ensure the outer layer and the core portion has a good metallurgical combine.

Kind of roll with a differential heat treatment process to obtain optimal organizational performance, the outer layer has a high, uniform hardness, high wear resistance. After the high temperature treatment of the barrel with a suitable level of stress.

Main application

  • Backup rolls for finishing stands of hot strip mill.
  • All kinds of cold rolling mill bearing rollers.
  • Various types of plate, Stecket mill backup roll.
  • Mill bearing rollers.

Performance Characteristics

  • It has excellent resistance to contact fatigue performance.
  • In various strip mill forged backup rolls exhibit comparable performance, cost-effective.
  • Produce large diameter, heavy plate mill specifications support rollers.

Microstructure

steel cast backup

The sinosteel xing machine can produce the biggest specifications composite cast steel backup roll for Φ 1800, net weight of 80 T

Performance Indicators

Performance Index Units Numerical Value
Hardness HSD 55-70
Tensile strength MPa 900-1500
Thermal conductivity Wm℃.at 500℃ 35-38
Expansion factor 10-6/℃ 11.2-13.6
Elastic modulus 104MPa 21-22
Poisson’s ratio 0.25-0.30
Density Kg/m3 7820
Specific heat capacity J/g℃ 0.489