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Vehicle wheel steel and smelting method

A wheel steel and converter smelting technology, applied in the field of wheel steel and smelting the wheel steel, can solve the problems of hindering deformation austenite recovery, recrystallization and the like

Inactive Publication Date: 2008-08-20
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, niobium can refine the grains, make the NbC strain-induced fold out of the steel during the hot rolling process, hinder the recovery and recrystallization of the deformed austenite, and improve the strength and toughness of the steel, but so far, it has not been found in the wheel steel Technological Inspirations Containing Niobium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, desulfurize the molten iron in the molten iron pretreatment device, that is, add a desulfurizer composed of magnesium powder and lime powder to the molten iron. The weight ratio between magnesium powder and lime powder is 1:3. After routine testing, when the molten iron When the weight content of sulfur is ≤0.004%, the pretreatment process is completed, and the pretreated molten iron is transferred to the converter for smelting; in the process of converter smelting, lime and light-burned dolomite are added to the converter to make slag, and then the desulfurized The molten iron is sprayed with oxygen for 14 minutes. After the oxygen injection process is completed, the steel is tapped. The tapping temperature is kept at 1670°C, and the amount of slag dropped is less than or equal to 5 kg of steel slag per ton of steel; In the LF furnace, niobium, manganese and silicon are added to the ladle refining furnace according to the estimated alloy content in the molten ste...

Embodiment 2

[0019] According to the method of Example 1, the steps of molten iron pretreatment, converter smelting, and out-of-furnace refining are used to smelt wheel steel. The difference is that in the process of converter smelting, oxygen is sprayed for 18 minutes to the desulfurized molten iron, and the tapping temperature Keep at 1690°C; add 350 kg of silicon aluminum barium strontium calcium deoxidizer for each furnace of steel (150 tons of steel) in the refining process of LF furnace, and keep the top slag of molten steel in the furnace at 50 mm. The wheel steel includes the following materials in weight percentage: 0.12% carbon; 0.15% silicon; 1.00% manganese; 0.05% niobium;

Embodiment 3

[0021] According to the method of Example 1, the steps of molten iron pretreatment, converter smelting, and out-of-furnace refining are used to smelt wheel steel, the difference is: in the process of converter smelting, oxygen is injected into the desulfurized molten iron for 17 minutes and 45 seconds, and the steel is tapped The temperature is maintained at 1675°C; the silicon aluminum barium strontium calcium deoxidizer added in the refining process of the LF furnace is 400 kg per furnace of steel (150 tons of steel), and the top slag of molten steel in the furnace is kept at 40 mm. The wheel steel includes the following materials in weight percentage: 0.12% carbon; 0.15% silicon; 1.00% manganese; 0.05% niobium;

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Abstract

The invention relates to a wheel steel and a smelting method thereof. The wheel steel comprises elements of carbon, silicon, manganese, niobium, phosphor, oxygen, sulfur and iron, etc. By adopting the steps of hot metal pretreatment, converter smelting, refining outside the converter and conventional rolling, the wheel steel is smelted. The components of the alloy are controlled by means of micro alloying and calcium treatment, etc. The indexes of the yield strength, the tensile strength and the bending fatigue life of the wheel made from the wheel steel are all higher than that of the existing wheel steel, furthermore, the wheel steel can be further thinned; therefore, cars adopting the wheel made from the wheel steel can achieve energy saving.

Description

Technical field: [0001] The invention relates to a wheel steel and a method for smelting the wheel steel. Background technique: [0002] The self-weight of a motor vehicle is directly proportional to its fuel consumption, that is, the heavier the motor vehicle, the greater the fuel consumption. Reducing the weight of the vehicle body is one of the most effective means to achieve energy saving. The wheel is a part that carries the entire car body. While ensuring sufficient carrying capacity, the wheel should also have the characteristics of light weight to meet the needs of energy saving. In the prior art, the materials used to make wheels include aluminum, magnesium, plastics and steel plates, etc., as disclosed in Chinese Patent No. 1884599 entitled "A Magnesium Alloy Wheel Hub and Its Manufacturing Method" which provides the use of magnesium alloys to make cars. A concrete example of a hub. Although the quality of magnesium alloy is lighter than that of steel plate, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12C22C33/04C21C7/00C21C7/064
Inventor 邹天来张永付曲鹏杜林秀吴刚赵迪徐明梁雪冬张力龙
Owner BENGANG STEEL PLATES
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