A Production Process for Increasing the Number of Continuous Casting Furnaces of Aluminum Deoxidized High Carbon Chromium Bearing Steel

An aluminum deoxidation high-carbon chromium bearing and production process technology, applied in the field of iron and steel metallurgy, can solve the problems of unqualified water immersion flaw detection and poor castability of bearing steel, so as to solve the problem of unqualified water immersion flaw detection and increase the number of continuous casting furnaces , Improve the effect of purity

Active Publication Date: 2022-04-26
ZENITH STEEL GROUP CORP CO LTD +1
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Problems solved by technology

[0008] In view of the problems pointed out in the background technology that bearing steel has poor castability and unqualified water immersion flaw detection, the purpose of this invention is to propose a production process for increasing the number of continuous casting furnaces of aluminum-deoxidized high-carbon chromium bearing steel

Method used

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  • A Production Process for Increasing the Number of Continuous Casting Furnaces of Aluminum Deoxidized High Carbon Chromium Bearing Steel
  • A Production Process for Increasing the Number of Continuous Casting Furnaces of Aluminum Deoxidized High Carbon Chromium Bearing Steel
  • A Production Process for Increasing the Number of Continuous Casting Furnaces of Aluminum Deoxidized High Carbon Chromium Bearing Steel

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Embodiment

[0021] The test steel is high-carbon chromium bearing steel, the grade is GCr15, and the production process is "converter / electric furnace—LF refining—RH vacuum treatment—billet continuous casting":

[0022] (1) During the tapping process, aluminum grains are added for deoxidation at one time. It is required that the aluminum content in the steel be added to 0.03-0.06%. slag or slag removal;

[0023] (2) Add lime, quartz sand or CaO-Al to LF refining slag 2 o 3 It is one or several kinds of pre-melted slag, and it is required to ensure the final slag basicity of LF refining slag CaO / SiO 2 Control range 3.0~4.5, final slag CaO / Al 2 o 3 The control range is 1.3~2.5, the amount of refining slag added is 8~10kg / t, and the final slag is required to be 0.3%

[0024] (3) After the LF refining is completed, the molten steel is subjected to RH vacuum treatment according to the co...

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Abstract

The invention belongs to the field of iron and steel metallurgy, and relates to a production process for increasing the number of continuous casting furnaces for aluminum deoxidized bearing steel. The LF refining slag of the invention uses CaO-Al 2 o 3 ‑SiO2 2 Slag system, final slag basicity CaO / SiO 2 Control range 3.0~4.5, final slag CaO / Al 2 o 3 The control range is 1.3~2.5, the refining slag addition is 8~10kg / t, and the final slag FeO+MnO<0.8% is required at the same time; The rod is made of solid aluminum carbon. The invention can reduce the reaction between molten steel and refractory materials while inhibiting the reaction of slag steel, reduce the formation of spinel inclusions, and significantly increase the number of continuous casting furnaces and the qualified rate of water immersion flaw detection.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a production process for increasing the number of continuous casting furnaces of aluminum deoxidized bearing steel. Background technique [0002] Bearings are the key parts of mechanical parts, and have extremely high requirements on their fatigue life and performance stability. Studies have shown that the purity of bearing steel has an important impact on the fatigue life and performance stability of bearings. Therefore, in the refining process of bearing steel, metal aluminum is usually used for deoxidation, and high-alkalinity refining slag is used to ensure the purity of bearing steel. The current process can usually control the total oxygen in the steel below 6ppm, and realize the control of ultra-high cleanliness of bearing steel. However, the use of aluminum deoxidation high-alkalinity refining slag refining often produces magnesium-aluminum spinel inclusions in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C21C7/00C04B35/66
CPCC21C7/06C21C7/0006C04B35/66C04B2235/3217C04B2235/3418C04B2235/3244C04B2235/422C04B2235/402C04B2235/9676C04B2235/9607Y02P10/20
Inventor 王昆鹏彭磊王郢徐建飞赵阳谢立陈廷军
Owner ZENITH STEEL GROUP CORP CO LTD
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