NM360-YLJ wear-resistant steel for press vibrating wheel of 360 degree roll pressing round-formed roller was designed. The results show that the optimum austenitizing temperature of steel is 870 ~910 T

carbides precipitated in multiple habitual directions are distributed on the martensite lath with a width of about 15 ~ 50 mm and a length of about 60-110mm

there are several large angle grain boundary structures in quenched martensite lath bundles

and the orientation difference distribution is mainly in 60° with martensite proportion 63. 5% ~ 66. 9% and martensite width 0. 08 ~ 6.6 μm. The properties of steel are yield strength 980 〜1 000 MPa

tensile strength 1 182 〜1 198 MPa

elongation 22% ~25%

surface vickers hardness value 363 ~379HV and low temperature impact energy at -40°C 160 to 175 J

better strength-toughess matching and roll pressing formed performance is obtained.