Bearing steel material with long service life and machining method thereof

Abstract

The invention discloses bearing steel material with long service life and a machining method thereof. The bearing steel material with the long service life comprises, by weight percentage, 0.95-1.05% of C, 0.15-0.35% of si, 0.25-0.45% of Mn, 1.40-1.60% of Cr, 0.05-0.09% of Ni, 0.02-0.05% of M0, smaller than or equal to 0.05% of Al, 0.05-0.08% of Cu, smaller than or equal to 0.01% of P, smaller than or equal to 0.008% of S, smaller than or equal to 0.0025% of Ti, smaller than or equal to 0.002% of O, smaller than or equal to 0.04% of As, smaller than or equal to 0.03% of Sn, smaller than or equal to 0.005% of Sb, smaller than or equal to 0.002% of Pb, smaller than or equal to 0.001% of Ca and the balance Fe. The bearing steel material with the long service life has high elastic limit, tensile strength and contact fatigue strength, has high hardening capacity and necessary hardenability so that the high wear resistance can be guaranteed, has certain impact toughness, has good dimensional stability or structure stability, can resist chemical corrosion and can effectively reduce the phenomena of fatigue flaking, jamming, ferrule breakage, wear and corrosion.

Description

Technical field [0001] The invention relates to a new material for bearing steel and a processing method thereof. Background technique [0002] my country’s traditional major equipment such as precision machine tools, metallurgical equipment, heavy equipment, high-end automobiles and emerging strategic industries such as wind power, high-speed railways and aerospace are important pillar industries of my country’s industrial system. Among them, bearings are very critical components and their service life The level of reliability and reliability determine the performance of the host to a certain extent. With the rapid development of science and technology in China, many high-end fields, such as aviation, aerospace, transportation, energy (wind power, solar power, nuclear power), and marine engineering have put forward many new requirements for the bearings used, and their scope of use is also expanding. Therefore, , It also puts forward more requirements on the new performance and ...

AI Technical Summary

Problems solved by technology

With the rapid development of science and technology in our country, in many high-end fields, such as aviation, aerospace, transportation, energy (wind power, solar energy, nuclear power), ocean engineering, many new requirements have been put forward for the bearings used, and the scope of use is also expanding. Therefore, , more requirements are put forward on the new performance and quality of the bearing materials used. For example, aero-engine bearings need to work under high temperature conditions, so high temperature bearings are required to be manufactured; the atomic energy industry needs to use anti-corrosion, radiation-resistant and non-magnetic and other special requirements, so it is necessary to use stainless steel bearings or non-magnetic corrosion-resistant stainless bearing steel to manufacture; various military products are also inseparable from bearings, such as modern weapons such as aircraft, warships, missiles, radars, tanks and cannons are inseparable from bearings , These bearings need to be manufactured with various bearing materials. It can be said that the application of the bearing field is becoming more and more extensive and more and more important. The types and properties of special bearing steels that are currently available are far from meeting their needs. Therefore, it is necessary to vigorously research and develop new high-life bearing steels to meet the needs of the development of the bearing industry, scientific and technological progress, and the needs of the national defense industry, which plays a very important role in ensuring the development of China's science and technology and national defense industries.

[0003] The minimum service life of bearings for foreign automotive gearboxes is 500,000 kilometers, and the service life of domestic similar bearings is about 100,000 kilometers, and the reliability and stability are poor

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