Steel material for forged steel brake disc of high-speed train with speed of 350 km and above per hour and forging process of steel material

Abstract

The invention provides a steel material for a forged steel brake disc of a high-speed train with the speed of 350 km or above per hour and a forging technology of the steel material. The brake disc is prepared from, by mass, 0.25%-0.29% of C, 0.2%-0.35% of Si, 0.6%-0.9% of Mn, 2.1%-2.5% of Cr, 0.9%-1.1% of Mo, 0.2%-0.3% of V, 0.02%-0.04% of Al, 0.05%-0.08% of Nb and the balance iron and other elements, and the other elements are residual microelements. The blank of steel materials for forging and heat treatment of the high-speed rail brake disc with the speed of 350 km and above in China is filled firstly, the steel materials have the characteristics of fine grain size, uniform structure, normal-temperature performance, low-temperature performance and high-temperature performance, it is guaranteed that various performance requirements of the high-speed rail brake disc with the speed of 350 km and above are met, the raw material cost is saved, and the production cost is reduced. And the range of the steel material for forging the high-speed rail brake disc with the speed of 350 km and above in China can be widened to a certain extent, and localization of the steel material for forging the high-speed rail brake disc with the speed of 350 km and above is achieved.

Description

technical field [0001] The invention belongs to the technical field of alloy forged steel, and in particular relates to a steel material for a forged steel brake disc of a high-speed train with a speed of 350 km and above and a forging process thereof. Background technique [0002] High-speed rail brake discs are key components for high-speed rail braking, especially for 350Km / h and higher-speed EMUs. The quality and performance of brake discs directly affect the performance indicators of EMUs, and affect the future speed of 350km / h and above high-speed trains Promotion and popularization; At present, domestic brake discs are mainly made of cast steel or rely on imports, which not only have a high price, but also cannot support the development of high-speed rail with a speed of 350km / h and above in the future. The materials used for brake discs of high-speed trains are mainly steel-based metal materials, including cast steel and forged steel. Due to the limitation of domest...

AI Technical Summary

Problems solved by technology

Due to the limitation of domestic casting level, the production quality of cast steel used for high-speed train brake discs is unstable, and quality problems are prone to affect the use effect and life of brake discs. Need, there is an urgent need to study a steel material and forging process for forged steel brake discs of high-speed trains with a speed of 350km / h and above that have better comprehensive performance, stable quality, high cost performance, and are suitable for safe use in various places in my country.

Images