Technological process of making flat spring steel for automobile

A process method and flat steel technology, applied in the direction of manufacturing converters, etc., can solve the problems of poor quality of spring flat steel, less than 90% blanking rate of ingots, poor blanking and sizing ratio, etc. The effect of high rate, omission of blanking process, and stable liquid level
CN1487099AInactive Publication Date: 2004-04-07青岛钢铁控股集团有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
青岛钢铁控股集团有限责任公司
Publication Date
2004-04-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The flat spring steel for automobile is produced via converter smelting process. Compared with available technology, the present invention has the following advantages and positive effects: utilizing molten iron with less harmful elements as material to result in high flat spring steel quality; higher finished product rate and lower power consumption to result in lower cost than production in electric furnace; casting molten steel into small square billet to omit the billet cutting step and lower cost; and high size precision of the continuously cast small square billet to ensure high size precision of flat spring steel.
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Description

technical field

[0001] The invention relates to a process for manufacturing flat spring steel for automobiles, in particular to the improvement of the existing method. Background technique

[0002] Spring flat steel is mainly used for damping springs of automobiles and other motor vehicles. Since the damping spring is used under dynamic load, reciprocating vibration, impact and other conditions, it is required to have high strength, fatigue limit and impact toughness. Its main grade is 60Si 2 Mn, 50CrV, etc. The existing technology of spring flat steel for automobiles adopts the electric furnace process, and its technological process is roughly as follows, electric furnace→injection of steel ingot→slab cutting→rolling into flat steel. After long-term practice, it is found that the process has the following defects: the raw material of the electric furnace is scrap steel, and there are a lot of harmful elements in the scrap steel, which will have a bad influence on the qua...

Claims

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