Wear-resistant composite steel plate and manufacturing method thereof

Abstract

The invention discloses a wear-resistant composite steel plate. The wear-resistant composite steel plate comprises a substrate layer and a composite layer compounded to one side or two sides of the substrate layer; and the substrate layer is a carbon steel layer, the composite layer is a high-manganese steel layer, and the content of Mn element in the composite layer is 11.00-15.00 wt.%. The invention also discloses a manufacturing method of the wear-resistant composite steel plate. The manufacturing method comprises the following steps: (1) producing a carbon steel layer slab and a high-manganese steel layer slab; (2) assembling the slabs; (3) heating: raising the temperature to 1150-1250 DEG C, and keeping the temperature for 1-3 h; (4) carrying out composite rolling: rolling at an initial rolling temperature of 1120-1220 DEG C and a finishing rolling temperature of 1050-1200 DEG C, and controlling the reduction ratio to be 50% or above; and 5) cooling after rolling. The wear-resistant composite steel plate of the invention has the advantages of high strength and hardness, high wear resistance, high toughness and excellent comprehensive performances.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a composite steel plate and a manufacturing method thereof. Background technique [0002] High-manganese steel is widely used in wear-resistant parts in many industries, and its surface hardens rapidly under a large impact (the surface hardness can reach HB550 or above after fully hardened), showing excellent wear resistance. Due to its low strength and hardness, it cannot be applied to key structural parts that need to bear weight. In addition, there are some problems in the use of high manganese steel. For example, high manganese steel has strong rheology and is used as a large mill liner. When the liner is impacted and expanded, the liner will be arched and the bolts will fall off; for example, when high manganese steel is used in the compartment plate and the grate plate, the flow of the material will make the grate seam sticky and cause a serious drop in th...

AI Technical Summary

Problems solved by technology

Due to its low strength and hardness, it cannot be applied to key structural parts that need to bear weight. In addition, there are some problems in the use of high manganese steel. For example, high manganese steel has strong rheology and is used as a large mill liner. When the liner is impacted and expanded, the liner will be arched and the bolts will fall off; for example, when high manganese steel is used in the compartment plate and the grate plate, the flow of the material will make the grate seam sticky and cause a serious drop in the output of the mill. , high-manganese steel, a high-quality wear-resistant material, has some defects during use

[0003] High manganese steel is mostly produced by casting. Generally, the internal quality of the ingot is poor, there are many defects, and it is prone to cracks during use, which greatly reduces the service life of the product and increases the cost of use, which is not conducive to product marketing.

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