The production process flowsheet of tested steel NM360 (/%: 0.17C

0.38Si

1.28Mn

0.014P

0.005S

0.23Cr

0.14Mo

0.02Ti

0.04Al) 30mm plate is 90t EAF-LF-VD-180mmx1330mm slab casting-rolling to 30mm plate-quenching at 950°C and tempering at 350

°C

.With using the Gleeble-3500 thermal simulation testing machine

the deformation behavior of wear resistant steel NM360 at 900~1200

°C

with strain rate 0.1

1 and 10s

-1

has been studied to define the thermal deformation equation and the hot working map of steel is established. Results show that the flow behavior of steel NM360 at th

ermal compressing deformation could be well described by the Zener-Hollomon parameter and the calculated dynamic activation energy is 305kJ/mol. With increasing temperature and decreasing strain rate

the efficiency of energy dissipation gradually increases；as at 1100°C with strain rate 0.1s

-1

the efficiency of deformation energy dissipation is up to max value 0.34

The wear steel has better deformability at 1070~1170°C with strain rate 0.1~0.5s

-1

. The production results show that with optimization process-180mm casting slab heating at (1200±20)°C

beginning rolling at (1050土10)°C

finishing rolling at (950±10)°C to 30mm plate

water cooling

tempering at 350~550°C for 1h

the NM360 steel HB hardness value is 368~385

yield strength is 830~920MPa

tensile strength is 1030~1120MPa and elongation is 10%~15%

it has better mechanical properties.