NM600 high-grade low-alloy wear-resistant steel and application thereof

Abstract

The invention provides NM600 high-grade low-alloy wear-resistant steel and a manufacturing method thereof. The steel is prepared from, by weight, 0.38%-0.45% of C, 0.10%-0.40% of Si, 0.30%-0.80% of Mn, smaller than or equal to 0.012% of P, smaller than or equal to 0.003% of S, 0.30%-1.00% of Cr, 0.20%-0.60% of Mo, 1.50%-2.50% of Ni, 0.30%-0.60% of Cu, 0.008%-0.030% of Ti, 0.015%-0.050% of Nb, smaller than or equal to 0.010% of V, 0.0008%-0.0025% of B, smaller than or equal to 0.0035% of N and smaller than or equal to 0.0025% of O. The invention further provides a steel plate prepared from the NM600 high-grade low-alloy wear-resistant steel. The Brinell hardness of the steel plate ranges from 570 HBW to 630 HBW, and low temperature impact toughness at -20 DEG C is larger than or equal to 27.

Description

technical field

[0001] The invention relates to the field of wear-resistant steel manufacturing, in particular to an NM600 high-grade low-alloy wear-resistant steel plate and a manufacturing method thereof. Background technique

[0002] Low-alloy wear-resistant steel is widely used in engineering, mining, construction, agriculture, cement with harsh working conditions, requiring high strength and hardness, and good wear resistance due to its low alloy content, good overall performance, and flexible and convenient production. , ports, electric power and metallurgy and other machinery and equipment manufacturing, such as bulldozers, loaders, excavators, dump trucks, ball mills and various mining machinery, grabs, stackers and reclaimers, feeding bending structures, etc. Such parts generally work under extremely harsh conditions of dry and wet environments, and are difficult to replace. The steel plate is required to have high strength, hardness, excellent wear resistance and c...

Examples

Embodiment 1

[0043] The molten steel smelted according to the proportions in Table 1 is subjected to vacuum degassing treatment before continuous casting. The thickness of the continuous casting slab is 150mm. The steel slab is heated to a furnace temperature of 1180°C. Rolling in the non-recrystallized area, where the final rolling temperature in the recrystallized area is 1025°C, the final rolling temperature in the non-recrystallized area is 910°C, and the final rolling thickness of the steel plate is 12mm. After rolling, it is air-cooled to room temperature, and then quenched and tempered For processing, the quenching temperature is 880°C and the tempering temperature is 170°C.

Embodiment 2

[0045] The molten steel smelted according to the proportions in Table 1 is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 220mm. The steel slab is heated to a furnace temperature of 1200°C. Rolling in the non-recrystallization area, where the final rolling temperature in the recrystallization area is 1030°C, the final rolling temperature in the non-recrystallization area is 850°C, the final rolling thickness of the steel plate is 40mm, air-cooled to room temperature after rolling, and then quenched and tempered For processing, the quenching temperature is 920°C and the tempering temperature is 250°C.

Embodiment 3

[0047] The molten steel smelted according to the proportions in Table 1 is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 300mm. The steel slab is heated to a furnace temperature of 1220°C. Rolling in the non-recrystallization zone, where the final rolling temperature in the recrystallization zone is 1040°C, the final rolling temperature in the non-recrystallization zone is 890°C, the final rolling thickness of the steel plate is 25mm, air-cooled to room temperature after rolling, and then quenched and tempered For processing, the quenching temperature is 930°C and the tempering temperature is 180°C.

technical field

[0001] The invention relates to the field of wear-resistant steel manufacturing, in particular to an NM600 high-grade low-alloy wear-resistant steel plate and a manufacturing method thereof. Background technique

[0002] Low-alloy wear-resistant steel is widely used in engineering, mining, construction, agriculture, cement with harsh working conditions, requiring high strength and hardness, and good wear resistance due to its low alloy content, good overall performance, and flexible and convenient production. , ports, electric power and metallurgy and other machinery and equipment manufacturing, such as bulldozers, loaders, excavators, dump trucks, ball mills and various mining machinery, grabs, stackers and reclaimers, feeding bending structures, etc. Such parts generally work under extremely harsh conditions of dry and wet environments, and are difficult to replace. The steel plate is required to have high strength, hardness, excellent wear resistance and c...

Examples

Embodiment 1

[0043] The molten steel smelted according to the proportions in Table 1 is subjected to vacuum degassing treatment before continuous casting. The thickness of the continuous casting slab is 150mm. The steel slab is heated to a furnace temperature of 1180°C. Rolling in the non-recrystallized area, where the final rolling temperature in the recrystallized area is 1025°C, the final rolling temperature in the non-recrystallized area is 910°C, and the final rolling thickness of the steel plate is 12mm. After rolling, it is air-cooled to room temperature, and then quenched and tempered For processing, the quenching temperature is 880°C and the tempering temperature is 170°C.

Embodiment 2

[0045] The molten steel smelted according to the proportions in Table 1 is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 220mm. The steel slab is heated to a furnace temperature of 1200°C. Rolling in the non-recrystallization area, where the final rolling temperature in the recrystallization area is 1030°C, the final rolling temperature in the non-recrystallization area is 850°C, the final rolling thickness of the steel plate is 40mm, air-cooled to room temperature after rolling, and then quenched and tempered For processing, the quenching temperature is 920°C and the tempering temperature is 250°C.

Embodiment 3

[0047] The molten steel smelted according to the proportions in Table 1 is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 300mm. The steel slab is heated to a furnace temperature of 1220°C. Rolling in the non-recrystallization zone, where the final rolling temperature in the recrystallization zone is 1040°C, the final rolling temperature in the non-recrystallization zone is 890°C, the final rolling thickness of the steel plate is 25mm, air-cooled to room temperature after rolling, and then quenched and tempered For processing, the quenching temperature is 930°C and the tempering temperature is 180°C.

Images