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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: 2006-07-19
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 The content of the material is still high, resulting in low fatigue strength and low fatigue life of the steel

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0015] According to the barium microalloyed bearing steel of the present invention, 3 heats of steel were melted on the test electric furnace and the refining furnace, and the primary smelting was carried out on the electric furnace first, and its chemical composition was measured before tapping. After tapping, conventional Refining slag and adding pre-deoxidizer aluminum or silicon-aluminum alloy, then put the ladle containing molten steel into the refining furnace for refining, after adjusting the chemical composition, add barium alloy by cored wire feeding method or alloy block method, and the temperature of molten steel is suitable Then steel is tapped, poured into cast and rolled into products, and then samples are taken to determine the chemical composition and mechanical properties. The chemical composition of the 3 furnace steel is shown in Table 1, and the detection results of inclusions are shown in Table 2. Table 3 is the working life test results.

[0016] ...

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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, in particular to alloy steel containing barium. Background technique [0002] With the development of modern industry, higher requirements are put forward for the performance and cleanliness of steel materials and the composition, shape, size and distribution of inclusions in steel. For some specific steel types, 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 Inclusions are also the key to achieving continuous casting with low superheat. At present, the deoxidation process mainly includes two methods: aluminum deoxidation and non-aluminum deoxidation. The former mainly utilizes the characteristics of strong binding ability between aluminum and oxygen, and first uses aluminum to convert more than 90% of the total oxygen in the steel into Al 2 o 3 inclu...

Claims

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Application Information

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