A wear-resistant composite steel plate and its manufacturing method

Abstract

The invention discloses a wear-resistant composite steel plate, which comprises a substrate layer and a composite layer compounded on one or both sides of the substrate layer; the substrate layer is a carbon steel layer, and the composite layer is a high manganese steel layer. The content of Mn element in the composite layer is 11.00-15.00wt.%. In addition, the present invention also discloses a method for manufacturing the above-mentioned wear-resistant composite steel plate, comprising the steps of: (1) preparing a carbon steel layer slab and a high manganese steel layer slab; (2) assembling the slab; (3) heating : The heating temperature is 1150-1250°C, and the heat preservation is 1-3 hours; (4) Composite rolling: the starting rolling temperature is 1120-1220°C, the final rolling temperature is 1050-1200°C, and the control reduction rate is ≥50%; (5 ) Cooling after rolling. The wear-resistant composite steel plate of the present invention has high strength and hardness, high wear resistance and high toughness, and the comprehensive performance of the steel plate is excellent.

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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