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

Inactive Publication Date: 2004-04-07
青岛钢铁控股集团有限责任公司
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Problems solved by technology

[0003] The present invention aims to solve the existing problems of poor quality of the existing spring flat steel, ingot blanking rate of less than 90%, and poor blanking rate of sizing, etc.

Method used

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  • Technological process of making flat spring steel for automobile
  • Technological process of making flat spring steel for automobile
  • Technological process of making flat spring steel for automobile

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Experimental program
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Embodiment Construction

[0031] see figure 1 , figure 2 and image 3 , the grade of the smelted spring flat steel is 60Si 2 Mn is made by converter smelting process.

[0032] Described spring flat steel adopts converter smelting process to carry out as follows:

[0033] Charging process → blowing process → deoxidation and alloying → continuous casting billet → rolling into flat steel;

[0034] (1), the main raw material of described charging operation is molten iron 85-90%, steel scrap 10-15%;

[0035] (2), the described blowing process adopts the carbon drawing method, and the carbon drawing method is to calculate the required oxygen amount according to the initial carbon content of the charged molten iron and the target carbon content of the steel made, and then according to the required oxygen content Quantity control of oxygen supply time. At the same time, through reasonable control of process gun position, decarburization speed and slag oxidation, impurities such as P and S are quickly re...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115C21C5/28
Inventor 王玉科杨家景
Owner 青岛钢铁控股集团有限责任公司
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