Barium micro alloying bearing steel

A technology of microalloying and bearing steel, which is applied in the field of alloy steel, can solve the problems of high inclusion content, low fatigue strength, and low fatigue life, and achieve the effects of improving strength, toughness, fatigue life, and cleanliness

Inactive Publication Date: 2005-03-09
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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Embodiment Construction

[0015] According to the barium microalloyed bearing steel of the present invention, 3 furnaces of steel are smelted in the test electric furnace and the refining furnace, firstly smelted in the electric furnace, the chemical composition is measured before the steel is tapped, and the conventional steel is added to the ladle after the tapping. Refining slag and adding pre-deoxidizer aluminum or silicon-aluminum alloy, and then put the ladle containing molten steel into the refining furnace for refining. After adjusting the chemical composition, the barium alloy is added by the cored wire feeding method or the alloy block method. The temperature of the molten steel is appropriate. The steel is then tapped, cast into casts and rolled into products, and then samples are taken to determine the chemical composition and mechanical properties. The chemical composition of the three heats of steel is shown in Table 1, and the detection results of inclusions are shown in Table 2. Table 3...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04
Inventor 王忠英董书通于桂玲
Owner CENT IRON & STEEL RES INST
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