Baoshan Iron & Steel Co., Ltd.

Xiaojun Liang

Sihai Jiao

Liandeng Yao

Hongbin Li

Suoquan Zhang

Xiangqian Yuan

Jianhua Ding

Disclosed is a high-strength high-toughness and wear-resistant composite steel plate, comprising a substrate layer and a composite layer of which a single side or double sides are composited on the substrate layer. The substrate layer is a carbon steel layer and the composite layer is a ultra-high manganese steel layer with a content of Mn element in the composite layer being about 16.00-25.00 wt. %. Further disclosed is a manufacturing method for making the high-strength high-toughness and wear-resistant composite steel plate. With high strength and hardness, high wear resistance and high toughness, the high-strength high-toughness and wear-resistant composite steel plate has excellent comprehensive performance.

High-strength high-toughness and wear-resistant composite steel plate and manufacturing method therefor

Provided are a gradient steel material having a surface layer with ferrite and an inner layer with ferrite+pearlite, and a manufacturing method, the weight percentages of the components are: C≤0.15%, Si≤1%, Mn≤1.5%, the balance of Fe and inevitable impurities, and the surface layer of the steel material is ferrite, the inner layer is ferrite+pearlite. The manufacturing method thereof includes: smelting, casting, rolling, heat treatment; wherein, in the heat treatment step, the steel material is heated above the austenitizing temperature Ac3, and hold at the temperature more than 3 min to ensure that the material is completely austenitized; subsequently, it is cooled to a temperature below Ar1 at a cooling rate lower than 0.5° C./s. The present steel material does not need to be obtained by means of the compound preparation of different materials, and is only processed and prepared by a single material, the process is short, the procedure is simple, and the cost is low.

Gradient steel material having surface layer with ferrite and inner layer with ferrite + pearlite and manufacturing method

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Shanghai, China

Xiaojun Liang