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A Nitrogen-Containing Composite Inoculant for Greatly Improving the Properties of Cast Iron

A compound inoculant and performance technology, which is applied in the field of metal casting, can solve the problems of limited performance improvement, inconvenient operation, large addition amount, etc., and achieve the effects of simple production, energy saving, and high cast iron strength

Active Publication Date: 2020-09-01
新沂永新机械配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing inoculation treatment has the following disadvantages: it is often necessary to add a variety of inoculants during the casting process, the addition amount is large, the operation is inconvenient, the cost is high, and the performance improvement is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A nitrogen-containing composite inoculant for greatly improving the performance of cast iron, comprising the following components by weight percentage:

[0044] Silicon 30%;

[0045] Nickel 30%;

[0046] Zinc 8%;

[0047] Manganese 12%;

[0048] Vanadium 8%;

[0049] Strontium 8%;

[0050] Nitrogen 4%.

Embodiment 2

[0052] A nitrogen-containing composite inoculant for greatly improving the performance of cast iron, comprising the following components by weight percentage:

[0053] Silicon 40%;

[0054] Nickel 20%;

[0055] Zinc 12%;

[0056] Manganese 8%;

[0057] Vanadium 5%;

[0058] Strontium 10%;

[0059] Nitrogen 5%.

Embodiment 3

[0061] A nitrogen-containing composite inoculant for greatly improving the performance of cast iron, comprising the following components by weight percentage:

[0062] Silicon 35%;

[0063] Nickel 25%;

[0064] Zinc 10%;

[0065] Manganese 10%;

[0066] Vanadium 7.5%;

[0067] Strontium 7.5%;

[0068] Nitrogen 5%.

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Abstract

The invention discloses a nitrogen-containing compound inoculant for greatly improving the performance of cast iron. The nitrogen-containing compound inoculant comprises, by weight percentage, 30-40%of silicon, 20-30% nickel, 8-12% of zinc, 8-12% of manganese, 5-10% of vanadium, 5-10% of strontium and 4-6% of nitrogen. According to the nitrogen-containing compound inoculant, the austenite dendrite is refined while the self-inducing ability of each of compound silicon, nickel, zinc, manganese, vanadium, niobium and nitrogen elements is exerted, and the strength of the alloy cast iron piece isimproved. The invention further discloses preparation of the nitrogen-containing compound inoculant. The preparation temperature of the inoculant is 20% lower than that of a general inoculant, and thenitrogen-containing compound inoculant has the beneficial effects of energy saving and environmental protection and can be industrially applied.

Description

technical field [0001] The invention belongs to the field of metal casting, in particular to a nitrogen-containing composite inoculant for greatly improving the performance of cast iron, its preparation method and application. [0002] technical background [0003] Cast iron is a general term for alloys mainly composed of iron, carbon and silicon. In these alloys, the carbon content exceeds the amount that can be retained in austenitic solid solution at the eutectic temperature. The formation process of graphite in cast iron is called graphitization process, and the basic process of formation of cast iron structure is the formation process of graphite in cast iron. Therefore, the conditions and influencing factors of the graphitization process are very important to the structure and properties of cast iron materials. The graphitization process of cast iron can be divided into three stages: [0004] The first stage is the liquid phase hypoeutectic crystallization stage. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08C21C1/08
CPCC21C1/08C22C33/08
Inventor 朱煜明
Owner 新沂永新机械配件有限公司
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