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Gray pig iron and preparing method and application thereof

A technology of gray cast iron and molten iron, which is applied in the field of gray cast iron and its preparation, can solve problems affecting the life safety of drivers and passengers, and achieve the effects of improving safety, stability and firmness

Inactive Publication Date: 2017-09-26
WUHU HEXU MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Especially when gray cast iron is used in automobiles and other accessories, its performance directly affects the safety of drivers and passengers, and when castings are deformed or cracked, it may directly cause serious consequences

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present invention also provides the preparation method of above-mentioned gray cast iron, it comprises:

[0026] Step 1. Add iron raw materials into the electric furnace, add nickel, titanium and manganese when heating up to 1600°C, continue to heat up until molten iron is produced, then remove slag and cool down to 30-40°C, and then collect molten iron;

[0027] Step 2: Add phosphorus, sulfur, chromium, copper and tin in sequence when the molten iron is collected 1 / 6-1 / 5, and then add carbon and silicon in sequence when the molten iron is collected 1 / 3-2 / 3, and then collect the molten iron Keep it warm for 45-55 minutes at a temperature of 1100°C, and finally pour and cool.

[0028] In some embodiments, the ferrous raw material includes pig iron and / or steel scrap, but is not limited thereto.

[0029] In addition, the present invention also provides an automobile accessory, which is made of the gray cast iron mentioned above.

[0030] In some embodiments, the acc...

Embodiment 1

[0032] A kind of gray cast iron, it comprises the following components calculated by mass percentage: 3.6 parts of carbon, 2.2 parts of silicon, 0.2 parts of manganese, 0.1 parts of phosphorus, 0.08 parts of sulfur, 2 parts of boron, 1 part of vanadium, 0.2 parts of chromium, 0.8 parts Copper, 0.8 parts tin, 1 part nickel, 1 part titanium and 76 parts iron.

[0033] The present invention also provides the preparation method of above-mentioned gray cast iron, it comprises:

[0034] Step 1. Add iron raw materials into the electric furnace, add nickel, titanium and manganese when heating up to 1600°C, continue to heat up until molten iron is formed, then remove slag and cool down to 30°C, and then collect molten iron;

[0035] Step 2: Add phosphorus, sulfur, chromium, copper and tin in sequence when the molten iron is collected 1 / 6, and then add carbon and silicon in sequence when the molten iron is collected 1 / 3, and then put the collected molten iron at a temperature of 1100°C ...

Embodiment 2

[0040] A kind of gray cast iron, it comprises the following components calculated by mass percentage: 4.0 parts of carbon, 2.4 parts of silicon, 0.4 parts of manganese, 0.3 parts of phosphorus, 0.12 parts of sulfur, 4 parts of boron, 3 parts of vanadium, 0.6 parts of chromium, 1.0 parts of Copper, 1.0 parts tin, 2 parts nickel, 3 parts titanium, and 80 parts iron.

[0041] The present invention also provides the preparation method of above-mentioned gray cast iron, it comprises:

[0042] Step 1. Add iron raw materials into the electric furnace, add nickel, titanium and manganese when heating up to 1600°C, continue to heat up until molten iron is formed, then remove slag and cool down to 40°C, and then collect molten iron;

[0043] Step 2: Add phosphorus, sulfur, chromium, copper and tin in sequence when collecting 1 / 5 of the molten iron, then add carbon and silicon in sequence when collecting 2 / 3 of the molten iron, and then store the collected molten iron at a temperature of ...

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Abstract

The invention discloses gray pig iron and a preparing method and application thereof. The gray pig iron comprises, by mass percentage, 3.6-4.0 parts of carbon, 2.2-2.4 parts of silicon, 0.2-0.4 part of manganese, 0.1-0.3 part of phosphorus, 0.08-0.12 part of sulphur, 2-4 parts of boron, 1-3 parts of vanadium, 0.2-0.6 part of chromium, 0.8-1.0 part of copper, 0.8-1.0 part of tin, 1-2 parts of nickel, 1-3 parts of titanium and 76-80 parts of iron. The invention further provides a preparing method of the gray pig iron. In addition, an accessory for a car is further provided. The accessory is made of the above gray pig iron. According to the gray pig iron, the chromium, the tin, the titanium and the iron are used in cooperation, and the firmness of the gray pig iron is greatly improved; and meanwhile, the stability of the gray pig iron is improved, and the safety of the gray pig iron accessory is improved. In addition, the preparing method of the gray pig iron is provided, the performance of the gray pig iron can be greatly improved through the method, and the safety of the gray pig iron is further improved.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to gray cast iron and its preparation method and application. Background technique [0002] Gray cast iron refers to cast iron with flake graphite, because the fracture is dark gray when broken, so it is called gray cast iron. The main components are iron, carbon, silicon, manganese, sulfur, and phosphorus. It is the most widely used cast iron, and its output accounts for more than 80% of the total output of cast iron. According to the morphology of graphite, gray cast iron can be divided into: ordinary gray cast iron, graphite is flake; nodular cast iron, graphite is spherical; malleable cast iron, graphite is flocculent; vermicular graphite cast iron, graphite is worm-like. [0003] Especially when gray cast iron is used in automobiles and other accessories, its performance directly affects the lives of drivers and passengers. When castings are deformed or cracked, it may dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/08C22C33/08
CPCC22C33/08C22C37/08C22C37/10
Inventor 俞保平姜丽牛家胜郑诗军
Owner WUHU HEXU MACHINERY
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