A high-strength, high-toughness and wear-resistant composite steel plate and its manufacturing method

Abstract

The invention discloses a high-strength, high-toughness and wear-resistant composite steel plate, which includes a substrate layer and a composite layer composited on one or both sides of the substrate layer; the substrate layer is a carbon steel layer, and the composite layer is ultra-high manganese. Steel layer, the content of Mn element in the composite layer is 16.00-25.00wt.%. In addition, the invention also discloses a method for manufacturing the above-mentioned high-strength, high-toughness and wear-resistant composite steel plate, which includes the steps: (1) preparing the base layer slab and the composite layer slab; (2) assembling the slab; (3) heating: The heating temperature is 1150~1250℃, and the heat preservation is 1~3 hours; (4) Composite rolling: the opening rolling temperature is 1120~1220℃, the final rolling temperature is 1050~1200℃, and the control reduction rate is ≥50%; (5) Cool after rolling. The high-strength, high-toughness and wear-resistant composite steel plate of the present invention not only has high hardness, but also has high wear resistance and high toughness, and the steel plate has excellent comprehensive properties.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a high-strength, high-toughness wear-resistant composite steel plate and a manufacturing method thereof. Background technique [0002] Ultra-high manganese steel is widely used in wear-resistant parts in many industries, especially for soft abrasives and large-angle erosion wear conditions, such as impact plates of fan coal mills, etc. Ultra-high manganese steel is developed by increasing the content of carbon and manganese on the basis of the standard composition of ordinary high manganese steel. It not only has a high work hardening rate, but also maintains a high toughness austenite structure, and has good wear resistance under medium and low impact conditions. It has been proved by experiments and actual production that the service life of the impact plate made of this material is nearly double that of ordinary high manganese steel. At home and abroad, ult...

AI Technical Summary

Problems solved by technology

[0003] However, there are still some problems with ultra-high manganese steel. For example, 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 ultra-high manganese steel. For example, ultra-high manganese steel has strong rheology. When it is used as a liner for a large mill, the liner will be arched due to impact and expansion, and the breaking bolt will fall off; Another example is when the ultra-high manganese steel is used in the compartment plate and the grate plate, the material rheology will cause the grate seam to be stuck and the output of the mill will be seriously reduced. Therefore, the high-quality wear-resistant material of ultra-high manganese steel has some flaws

[0004] Ultra-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.

Images