A kind of steel material for automobile with high elastic modulus and preparation method thereof

Abstract

The invention provides an iron and steel material for a high-elasticity-modulus automobile and a preparation method of the steel material, and belongs to the field of steel materials. According to theiron and steel material for the high-elasticity-modulus automobile, the elastic modulus is improved by forming reinforced phase particles in a matrix structure, and the reinforced phase particles atleast comprise BN. According to the iron and steel material, the BN particles with the elastic modulus up to 700 GPa are used for replacing the TiB2 particles, the control of the nitrogen element needs to comprehensively consider the influence of the content of the nitrogen element on the steel performance and the matching synergistic relation between the nitrogen element and the boron element, the generated BN particles can well replace the TiB2 particles so as to improve the elastic modulus of a material, the influence on the subsequent machining performance of the prepared steel and steel material cannot be caused, and industrial large-scale production and popularization and use are facilitated.

Description

technical field [0001] The invention relates to the field of steel materials, in particular to a steel material for automobiles with high elastic modulus and a preparation method thereof. Background technique [0002] In the automobile industry, the lightweight of the vehicle is to reduce the curb weight of the car as much as possible under the premise of ensuring the strength and safety performance of the car, so as to improve the power of the car, reduce fuel consumption, and reduce exhaust pollution. Replacing traditional low-strength steel with high-strength steel and advanced high-strength steel can increase the specific strength of automotive steel, reduce the thickness of steel plates, and achieve lightweight bodywork. [0003] At present, although the aluminum-rich and manganese-rich low-density high-strength steels under development can effectively increase the specific strength of the steel plate, the elastic modulus of the steel will tend to decrease with the incr...

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Problems solved by technology

[0005] However, the improvement of the elastic modulus of steel in the prior art is to form the reinforcing phase particles TiB through Ti and B elements. 2 To improve the elastic modulus of the material, but the content of Ti is too high, which affects the subsequent machining performance of the material, and the high price of Ti limits the cost reduction and large-scale application in the lightweight of mechanical equipment

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