CN101451172A - Si-Mg-Fe alloy nodularizer - Google Patents
Si-Mg-Fe alloy nodularizer Download PDFInfo
- Publication number
- CN101451172A CN101451172A CNA2007101587323A CN200710158732A CN101451172A CN 101451172 A CN101451172 A CN 101451172A CN A2007101587323 A CNA2007101587323 A CN A2007101587323A CN 200710158732 A CN200710158732 A CN 200710158732A CN 101451172 A CN101451172 A CN 101451172A
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- magnesium
- nodulizer
- alloy
- nodularizer
- silicon
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Abstract
The invention relates to a silicon-magnesium ferroalloy nodulizer, which is characterized in that the nodulizer comprises the following compositions by weight percentage: 5 to 15 percent of magnesium, 37 to 52 percent of silicon, and the balance being iron. The nodulizer can give full play to the advantages of various spheroidizing elements, improve the spheroidizing effect, and meet the demands of different production conditions and different structural castings by adjusting the content of the spheroidizing elements, has stable reaction, is easy to operate, and makes spheroidization stable. Simultaneously, due to increased crystal nucleus, the grain size of the castings is finer, so that the nodulizer not only has the enhancing function but also can reduce the chilling tendency.
Description
Technical field
The present invention relates to a kind of Si-Mg-Fe alloy nodularizer, belong to spheroidal graphite cast iron metal grain processing technology field.
Background technology
As everybody knows, it is essential producing spheroidal graphite cast iron nodularizer.For the foundry goods of different wall, Different Weight because its to solidify cooling conditions inconsistent, to the selection difference of nodulizing agent.For the thin-walled smallclothes, solidify fast, condensate depression is big, suitable globular graphite growth also is easy to occur simultaneously carbide, increases chilling tendency.Particularly when remaining magnesium surpasses 0.068%, easier generation carbide.Therefore, generally should select low rare earth, low magnesium nodulizer for use.For the foundry goods of wall thickness more than 120mm, because foundry goods centre solidification rate is little, there is the decaying spheroidisation phenomenon, generally should select high trade mark nodulizing agent for use or improve the nodulizing agent add-on.But too high explosion dress graphite and the inverse chill phenomenon of also can causing of residual rare earth can add a small amount of anti-nodularization antimony, perhaps bismuth, tin element in molten iron.Select the yttrium-base heavy rare earth nodulizing agent in addition, it is that the anti-ageing ability of moving back of nodulizing agent is strong than cerium, and chilling tendency is also little.
As everyone knows, magnesium, rare earth and calcium have stronger promotion spheroidization of graphite ability.Generally, the boiling point of magnesium is low, adds in the molten iron molten iron is acutely seethed, and reacts even up and down; Increase proportion after being made into alloy, make it in molten iron, be difficult for come-up, can reduce the oxidation and the scaling loss of magnesium.And rare earth element has the ability of very strong desulfurization degasification, purifying molten iron and elimination tension-active element, and China's rare earth resources is abundant, and it is lower to obtain raw materials cost.Though calcium can not use separately as nodulizing agent, be made into composite nodulizer with it and magnesium, rare earth, just both can reduce the consumption of MAGNESIUM METAL in the nodulizing agent, make spheroidizing steady, to reduce the big chilling tendency that causes because of rare earth.
At present, domestic manufacturing spheroidal graphite cast iron in enormous quantities need provide a kind of cheap, composite nodulizer that nodularization is effective.
Summary of the invention
The object of the present invention is to provide a kind of Si-Mg-Fe alloy nodularizer, be used for the spheroidal graphite cast iron metal grain and handle.
Above-mentioned purpose of the present invention is achieved by the following technical programs.
A kind of Si-Mg-Fe alloy nodularizer is characterized in that each weight percentages of components of said nodulizing agent is: magnesium 5-15%; Silicon 37-52%; Surplus is an iron.
Also contain gross weight 5～8% nickel oxide in the above-mentioned Si-Mg-Fe alloy nodularizer.
Generally, the nodulizing agent magnesium content is low more, and spheroidizing reacion is steady more, and the magnesium rate of recovery is high more.But low magnesium nodulizer strengthens the silicon consumption of molten iron.This nodulizing agent is applicable to handles sulphur and the lower molten iron of tension-active element content, pours into a mould the foundry goods of medium section thickness.
When using above-mentioned nodulizing agent, at first should note not allowing magnesium directly contact with scrap iron and steel material.At first generate Mg-Si mutually after allowing low-melting magnesium melt, to reduce the scaling loss of magnesium with the silicon effect.Secondly, also need artificial stirring in good time, so that inoculant alloy composition homogenizing in smelting process.
Nodulizing agent provided by the invention can be brought into play the strong point of various nodularization elements, improves the nodularization effect, and satisfies the demand of different working conditions, different structure foundry goods by the content of adjusting the nodularization element.And reacting balance, easy handling makes spheroidizing steady.Simultaneously,,, not only play strengthening effect, can also reduce chilling tendency, improve mechanical performance of products, improve the toughness and the anti-pull intensity of product so the casting crystalline grain degree is comparatively tiny because crystallization nuclei increases.
Embodiment
Below in conjunction with embodiment the present invention is elaborated.
Embodiment one: a kind of Si-Mg-Fe alloy nodularizer is characterized in that each weight percentages of components of said nodulizing agent is: magnesium 15%; Silicon 37%; Surplus is an iron.Also contain gross weight 8% nickel oxide in the above-mentioned Si-Mg-Fe alloy nodularizer.
Embodiment two: a kind of Si-Mg-Fe alloy nodularizer is characterized in that each weight percentages of components of said nodulizing agent is: magnesium 5%; Silicon 52%; Surplus is an iron.Also contain gross weight 5% nickel oxide in the above-mentioned Si-Mg-Fe alloy nodularizer.
Claims (2)
1, a kind of Si-Mg-Fe alloy nodularizer is characterized in that each weight percentages of components of said nodulizing agent is: magnesium 5-15%; Silicon 37-52%; Surplus is an iron.
2, Si-Mg-Fe alloy nodularizer according to claim 1 is characterized in that also containing in the said nodulizing agent gross weight 5～8% nickel oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101587323A CN101451172A (en) | 2007-12-06 | 2007-12-06 | Si-Mg-Fe alloy nodularizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101587323A CN101451172A (en) | 2007-12-06 | 2007-12-06 | Si-Mg-Fe alloy nodularizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101451172A true CN101451172A (en) | 2009-06-10 |
Family
ID=40733660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101587323A Pending CN101451172A (en) | 2007-12-06 | 2007-12-06 | Si-Mg-Fe alloy nodularizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101451172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561736A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron |
-
2007
- 2007-12-06 CN CNA2007101587323A patent/CN101451172A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561736A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090610 |