Steel with low friction coefficient and excellent fatigue property for automobile hollow stabilizer bar and production method thereof

Abstract

The invention provides steel with a low friction coefficient and an excellent fatigue property for an automobile hollow stabilizer bar and a production method thereof. The steel comprises the following components: 0.25%-0.27% of C, 0.20%-0.30% of Si, 1.20%-1.30% of Mn, less than or equal to 0.015% of P, less than or equal to 0.0050% of S, 0.15%-0.40% of Cr, 0.020%-0.050% of Al, 0.025%-0.045% of Nb, 0.10%-0.20% of Mo, less than or equal to 0.0050% of N, less than or equal to 0.0002% of H and the balance of Fe and inevitable impurities. Compared with the prior art, through component design and process optimization, intergranular oxidation is effectively eliminated, the outer side structure state of a plate strip is optimized, a decarburized layer is avoided, the fatigue life of the stabilizer bar finished product is prolonged, the friction coefficient is effectively reduced, the scratch risk in the subsequent machining process is reduced, and the effect of reducing the resistance in the cold drawing process can be achieved.

Description

technical field [0001] The patent of the present invention relates to the field of metal materials, and relates to steel for automobile hollow stabilizer bars with low friction coefficient and excellent fatigue properties and its production method, which is mainly used in the manufacture of automobile hollow stabilizer bars and the like. Background technique [0002] With the increasingly stringent demands on energy, environmental protection and safety, automobile lightweight has become an inevitable choice for the development of the automobile industry. Studies have shown that for every 10% reduction in body weight of a passenger car, fuel consumption and emissions can be reduced by 6%-8%. The lightweight of automobiles can not only reduce automobile fuel consumption and exhaust pollution, but also improve the handling stability and collision safety performance of vehicles to a certain extent. [0003] The lightweight of the whole vehicle mainly focuses on the three aspect...

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Problems solved by technology

This patent does not involve the production and manufacturing methods of raw materials and how to improve the surface quality of steel plates

And its composition contains 0.005%-0.05% Ti, which is not good for the fatigue performance of parts

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