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The paper has studied the mechanical properties and heat treatment effects on multi-element low alloy wear-resistant steel (MLAWS) used as a material for the liner of rolling mill torii. The results show that when quenched at 900-920℃ and tempered at 350-370℃, the MLAWS has achieved hardness above 60 HRC, tensile strength greater than 1 600 MPa, impact toughness higher than 18J/cm2 and fracture toughness greater than 37 MPa·m1/2. When the quenching temperature is lower than 900℃, the hardness of the MLAWS increases with the temperature. When the quenching temperature is higher than 900℃, the hardness decreases with the increase of temperature. At a quenching temperature below 920℃, the effect of quenching temperature on the impact toughness is not obvious. In quenching at above 920℃, impact toughness decreases as the temperature increases. When the tempering temperature is exceeding 450℃, the hardness begins to decrease significantly. Tempering at 350℃ has produced the best wear resistance on the MLAWS.
The paper has studied the mechanical properties and heat treatment effects on multi-element low alloy wear-resistant steel (MLAWS) used as a material for the liner of rolling mill torii. The results show that when quenched at 900-920 ° C and tempered at The MLAWS has had a hardness above 60 HRC and a tensile strength greater than 1 600 MPa, an impact toughness higher than 18 J / cm 2 and a fracture toughness greater than 37 MPa · m 1/2. , the hardness of the MLAWS increases with the temperature. When the quenching temperature is higher than 900 ° C, the hardness decreases with the increase of temperature. At a quenching temperature below 920 ° C, the effect of quenching temperature on the impact toughness is not obvious . When quenching at above 920 ℃, impact toughness decreases as the temperature increases. When the tempering temperature exceeds 450 ℃, the hardness begins to decrease significantly. best wear resistance on the MLAWS.