Barium micro alloying bearing steel

Abstract

A bearing steel microalloyed by Ba contains C, Si, Mn, Ba, S, P, Cr, Ni, V, Nb, Cu, Mo and Fe, and is prepared through smelting, refining and microalloying by Ba. It has high toughness and long endurance life.

Description

technical field [0001] The invention belongs to the field of alloy steel, and particularly relates to barium-containing alloy steel. Background technique [0002] With the development of modern industry, higher requirements are put forward for the performance, cleanliness of steel materials and the composition, shape, size and distribution of inclusions in steel. For some specific steel grades, such as bearing steel, spring steel and pipeline steel, not only low oxygen content in steel is required, but also strict control of Al in steel is required 2 O 3 inclusions, while low Al 2 O 3 Inclusion is also the key to realize continuous casting with low superheat. At present, there are mainly two methods of deoxidation: aluminum deoxidation and non-aluminum deoxidation. The former mainly uses the characteristics of strong bonding ability between aluminum and oxygen. First, aluminum is used to convert more than 90% of the total oxygen in the steel to form Al. 2 O 3 Inclusion...

AI Technical Summary

Problems solved by technology

[0003] The Soviet patent SU1011719 also discloses a barium-containing high-carbon bearing steel with a barium content of 0.0003-0.0010%. Because the barium content of the steel is too low, the effect of barium in the steel cannot be fully exerted, and the steel contains However, the content of steel is still high, resulting in low fatigue strength and low fatigue life of the steel.