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A casting method capable of producing high-strength cast iron

A cast iron, high-strength technology, applied in the field of casting that can produce high-strength cast iron, can solve the problems of difficult product control, large fluctuations in the chemical composition of molten iron, etc., to achieve the effect of weakening composition segregation, increasing fine-grain strengthening effect, and reducing segregation

Active Publication Date: 2017-06-06
HANSHAN ZHAOXIA CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the material is concerned, the main reason is that during the smelting process in most factories, the chemical composition inside the molten iron fluctuates greatly, making it difficult to control such products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A casting method capable of producing high-strength cast iron, comprising the following steps:

[0021] 1) Smelting ordinary scrap steel, adding ferrochromium, ferrotungsten, ferrotitanium, cobalt plate, scrap copper, borax after molten steel is melted, and heating up to 1510°C to become liquid molten iron;

[0022] 2) Add ferromanganese, ferrozirconium, calcium oxide, and silicon dioxide to the liquid molten iron prepared in step 1) for precipitation and deoxidation 11 minutes before being released from the furnace. After adjusting the composition, carry out slagging treatment to obtain refined molten iron. The mass percentage of each element in water is: carbon 3.1%, chromium 1.66%, manganese 0.92%, copper 0.52%, tungsten 0.03%, titanium 0.05%, cobalt 0.44%, boron 0.03%, zirconium 0.38%, silicon 0.66%, phosphorus 0.01% , sulfur 0.02%, the rest is iron and unavoidable impurities;

[0023] 3) Pouring the refined molten iron obtained in step 2) into a mold pre-heated to...

Embodiment 2

[0028] A casting method capable of producing high-strength cast iron, comprising the following steps:

[0029] 1) Smelting ordinary scrap steel, adding ferrochrome, ferrotungsten, ferrotitanium, cobalt plate, scrap copper, borax after molten steel is melted, and heating up to 1490°C to become liquid molten iron;

[0030] 2) Add ferromanganese, ferrozirconium, calcium oxide, and silicon dioxide to the liquid molten iron prepared in step 1) for precipitation and deoxidation 11 minutes before being released from the furnace. After adjusting the composition, carry out slagging treatment to obtain refined molten iron. The mass percentage of each element in water is: carbon 3.5%, chromium 1.45%, manganese 1%, copper 0.43%, tungsten 0.04%, titanium 0.04%, cobalt 0.76%, boron 0.01%, zirconium 0.67%, silicon 0.57%, phosphorus 0.01% , sulfur 0.04%, the rest is iron and unavoidable impurities;

[0031] 3) Pouring the refined molten iron obtained in step 2) into a mold pre-heated to 1400...

Embodiment 3

[0036] A casting method capable of producing high-strength cast iron, comprising the following steps:

[0037] 1) Smelting ordinary scrap steel, adding ferrochromium, ferrotungsten, ferrotitanium, cobalt plate, scrap copper, borax after molten steel is melted, and heating up to 1520°C to become liquid molten iron;

[0038] 2) Add ferromanganese, ferrozirconium, calcium oxide, and silicon dioxide to the liquid molten iron prepared in step 1) for precipitation and deoxidation 11 minutes before being released from the furnace. After adjusting the composition, carry out slagging treatment to obtain refined molten iron. The mass percentage of each element in water is: carbon 2.9%, chromium 1.86%, manganese 0.58%, copper 0.82%, tungsten 0.02%, titanium 0.03%, cobalt 0.39%, boron 0.04%, zirconium 0.22%, silicon 1.25%, phosphorus 0.02% , sulfur 0.01%, the rest is iron and unavoidable impurities;

[0039] 3) Pouring the refined molten iron obtained in step 2) into a mold pre-heated to...

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PUM

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Abstract

The invention discloses a novel casting method capable of producing high-strength cast iron. A casting is obtained by smelting common waste steel, ferrochrome, ferrotungsten, ferrotitanium, a cobalt plate, waste copper and borax, adding ferromanganese, ferrozirconium, calcium oxide and silicon dioxide to carry out precipitation deoxidation and slag removal, casting to a mould through ultrasonic vibration and carrying out thermal treatment. According to the novel casting method, uniformity of components inside the casting is increased by virtue of ultrasonic vibration and long-time thermal insulation time, so that the component segregation possibility is greatly weakened, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of cast iron preparation technology, in particular to a casting method capable of producing high-strength cast iron. Background technique [0002] At present, the production of iron castings in the world is increasing year by year, and the proportion of high-strength cast iron is increasing year by year. It is widely used in the manufacture of automobiles, tractors, agricultural machinery, machine tools and general machinery. Whether cast iron itself has excellent mechanical properties determines the service life and use effect of the machine to a large extent. For example, domestic diesel engine cylinder castings are more than 30% higher than foreign ones, and the tensile strength is higher than foreign ones when the carbon equivalent is the same. 1-2 grades lower. As far as the material is concerned, the main reason is that during the smelting process in most factories, the chemical composition inside the molten ir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/06C22C37/10C22C33/08B22D27/08C21D1/18C21D5/00
CPCB22D27/08C21D1/18C21D5/00C22C33/08C22C37/06C22C37/10Y02P10/20
Inventor 黄远霞
Owner HANSHAN ZHAOXIA CASTING