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Inoculating agent for improving machinability of high-strength gray cast iron and preparation method of gray cast iron

A gray cast iron, high-strength technology, applied in the field of metal casting, can solve the problems of increased tool wear and cutting resistance, and achieve the effects of improving cutting life, improving deformation, reducing friction force and wear area

Pending Publication Date: 2022-05-31
宁国东方碾磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gray cast iron with a high carbon equivalent will inevitably lead to an increase in cutting resistance, resulting in increased tool wear

Method used

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  • Inoculating agent for improving machinability of high-strength gray cast iron and preparation method of gray cast iron
  • Inoculating agent for improving machinability of high-strength gray cast iron and preparation method of gray cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An inoculant for improving the machinability of high-strength gray cast iron, its chemical composition includes: Si60.5%, Zr7.8%, Ca4.4%, Al2.2%, Ti6.7%, and the rest is Fe.

[0025] The preparation method of above-mentioned inoculant comprises:

[0026] The raw materials of ferrosilicon, silicon-calcium, silicon-zirconium, silicon-aluminum and titanium are calculated according to the chemical composition and the proportion and weight of each raw material, and put into an intermediate frequency induction furnace for melting. The melting temperature is 1340 ° C and the time is 20 minutes; melting After it is completely melted, pour the alloy liquid into a metal mold to cool, and the alloy solidifies in the mold to form a flake alloy; the flake alloy is broken into 2-6mm particles by crushing equipment, which is the improved high-strength gray cast iron Processing inoculants.

[0027] A kind of high-strength gray cast iron, its preparation method comprises the steps:

...

Embodiment 2

[0032] An inoculant for improving the machinability of high-strength gray cast iron, the chemical composition of which includes 55.4% Si, 9.7% Zr, 2.2% Ca, 2.9% Al, 5.3% Ti, and the rest is Fe.

[0033] The preparation method of above-mentioned inoculant comprises:

[0034] The raw materials of ferrosilicon, silicon-calcium, silicon-zirconium, silicon-aluminum and titanium are calculated according to the chemical composition and the proportion and weight of each raw material, and put into an intermediate frequency induction furnace for melting. The melting temperature is 1340 ° C and the time is 20 minutes; melting After it is completely melted, pour the alloy liquid into a metal mold to cool, and the alloy solidifies in the mold to form a flake alloy; the flake alloy is broken into 2-6mm particles by crushing equipment, which is the improved high-strength gray cast iron Processing inoculants.

[0035] A kind of high-strength gray cast iron, its preparation method comprises t...

Embodiment 3

[0040] An inoculant for improving the machinability of high-strength gray cast iron, its chemical composition includes: Si64.5%, Zr6.1%, Ca5.8%, Al1.3%, Ti7.9%, the rest is Fe.

[0041] The preparation method of above-mentioned inoculant comprises:

[0042] The raw materials of ferrosilicon, silicon-calcium, silicon-zirconium, silicon-aluminum and titanium are calculated according to the chemical composition and the proportion and weight of each raw material, and put into an intermediate frequency induction furnace for melting. The melting temperature is 1340 ° C and the time is 20 minutes; melting After it is completely melted, pour the alloy liquid into a metal mold to cool, and the alloy solidifies in the mold to form a flake alloy; the flake alloy is broken into 2-6mm particles by crushing equipment, which is the improved high-strength gray cast iron Processing inoculants.

[0043] A kind of high-strength gray cast iron, its preparation method comprises the steps:

[004...

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Abstract

The invention provides an inoculant for improving the machinability of high-strength gray cast iron and a preparation method of the gray cast iron. The inoculant comprises the following components in percentage by weight: 55-65% of Si, 6-10% of Zr, 2-6% of Ca, 1-3% of Al, 5-8% of Ti and the balance of Fe. The preparation method of the high-strength gray cast iron comprises the step of carrying out inoculation treatment on discharged molten iron of the gray cast iron by adopting the inoculant. According to the inoculant for improving the machinability of the high-strength gray cast iron and the preparation method of the gray cast iron, the section sensitivity and chilling tendency of the gray cast iron are relieved through the inoculant, fine and evenly-distributed A-type graphite can be obtained easily, and the obtained gray cast iron has high strength and good machinability.

Description

technical field [0001] The invention relates to the technical field of metal casting, in particular to an inoculant for improving the workability of high-strength gray cast iron and a preparation method of gray cast iron. Background technique [0002] Gray cast iron has good casting formability, processability, wear resistance, heat resistance, shock absorption and other properties. It is a traditional metal structure material and plays an important role in casting production. At present, gray iron castings account for the first place in weight of all kinds of castings (accounting for about 50-55%). With the intensification of market competition, although gray cast iron is a traditional "large quantity and wide range" metal structural material, it is also facing serious challenges in terms of material quality, performance and price. Especially in recent years, with the strengthening of Sino-foreign cooperation and exchanges, in many Sino-foreign joint venture production pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D1/00C22C33/08C21C1/08
CPCB22D1/00C22C33/08C21C1/08Y02P10/20
Inventor 赵东凯明章林刘伟汪海宁杨霄
Owner 宁国东方碾磨材料股份有限公司
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