Vanadium-titanium nodular cast iron smelting method

A technology of nodular cast iron and vanadium-titanium, which is applied in the field of smelting vanadium-titanium nodular cast iron, can solve the problems of increasing whitening tendency and achieve the effects of low cost, comprehensive performance and simple process

Inactive Publication Date: 2013-09-11
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the spheroidization effect, adding a small amount of Re to inhibit the despher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] A method for smelting vanadium-titanium nodular cast iron, which includes weighing charge, smelting, spheroidizing and inoculation, using a 50Kg intermediate frequency induction electric furnace for smelting. The charge used is as follows: vanadium-titanium pig iron 60%, scrap steel 35%, the rest is ferrosilicon and Ferromanganese, etc.; during the smelting step, add 1% of the weight of the iron oxide scale to the furnace charge, and the iron oxide scale is added to the bottom of the furnace charge during the smelting process; the oxide scale makes the molten iron in the melting process The titanium is preferentially oxidized but has little effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphitizing spheroidization effect of titanium, ensuring the spheroidization of graphite in vanadium-titanium ductile iron, and adding oxide scale also has a good effect in smelting. The dephosphorization effect. Afte...

Example Embodiment

[0026] Example 2:

[0027] A method for smelting vanadium-titanium nodular cast iron, which includes weighing charge, smelting, spheroidizing treatment and inoculation treatment. It is smelted in a 50Kg intermediate frequency induction electric furnace. The charge used is as follows: vanadium-titanium pig iron 60%, vanadium-titanium cast iron 35% and the rest It is ferrosilicon and ferromanganese, etc.; during the smelting step, an addition amount of 0.5% of the weight of the charge is added to the charge, and the scale is added to the bottom of the charge during smelting and charging; the scale is in the melting process In this way, the titanium in the molten iron is preferentially oxidized but has little effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphite spheroidization effect of titanium, ensuring the spheroidization of graphite in vanadium-titanium ductile iron, and adding oxide scale in the smelting It also has a good...

Example Embodiment

[0031] Example 3:

[0032] A smelting method for vanadium-titanium nodular cast iron, which includes weighing charge, smelting, spheroidizing treatment and inoculation treatment. It is smelted by a 50Kg intermediate frequency induction electric furnace. The charge used is as follows: vanadium-titanium pig iron 60%, vanadium-titanium cast iron 20% recycle charge, scrap steel 15%, the rest are ferrosilicon and ferromanganese, etc.; during the smelting step, add 1.5% iron oxide scale by weight of the charge into the charge, and the iron oxide scale is added to the bottom of the charge during smelting and charging; In the process of melting, the skin makes the titanium in the molten iron preferentially oxidizes but has little effect on the content of other elements, thereby reducing the titanium content, weakening the anti-graphite spheroidization effect of titanium, ensuring the graphite spheroidization in the vanadium-titanium ductile iron, and adding oxidation at the same time T...

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Abstract

The invention discloses a vanadium-titanium nodular cast iron smelting method which comprises the steps of weighing furnace burden, smelting, spheroidizing and inoculating, wherein the smelting step comprises the sub-steps: adding oxide scale of which the addition amount is 0.5-1.5 percent of the weight of the furnace burden, and adding the oxide scale at the bottom of the furnace burden during smelting and charging; in the smelting step, after the furnace burden is molten down, adding silicon iron into molten iron for regulating the components, so as to achieve the deoxidation effect. The method has the beneficial effects that the low-price oxide scale is added into the bottom of the furnace burden during charging, and the element Ti is oxidized preferentially, so that the titanium content is reduced, the inverse spheroidizing effect of titanium is weakened, nodularizing in vanadium-titanium ductile iron is guaranteed, and a good dephosphorization effect is achieved when the oxide scale is added during smelting; the oxide scale is wide in source and low in price, the oxide scale is reasonably utilized, the production cost can be reduced, and the environment-friendly energy-saving effects are achieved. According to the method, the process is simple, the operation is convenient and the cost is low, and the comprehensive performance of the vanadium-titanium nodular cast iron is guaranteed.

Description

technical field [0001] The invention relates to the technical field of smelting vanadium-titanium nodular cast iron, in particular to a method for smelting vanadium-titanium nodular cast iron. Background technique [0002] Spheroidal graphite cast iron is obtained through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially the plasticity and toughness, so as to obtain higher strength than carbon steel. It is based on its excellent performance that it has been successfully It is mainly used to cast some parts with complex stress, high strength, toughness and wear resistance. The products produced by ductile iron casting technology have the advantages of high strength, high toughness and low price, which are very in line with the requirements of automobile production and have been widely used in automobile production. Through continuous improvement of the technical level, nodular cast iron will be used in va...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C33/06
Inventor 李玉和苟淑云张雪峰党玉春沈向前
Owner XIHUA UNIV
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