CN1015553B - Cast iron strong graphited inoculant - Google Patents
Cast iron strong graphited inoculantInfo
- Publication number
- CN1015553B CN1015553B CN 90100282 CN90100282A CN1015553B CN 1015553 B CN1015553 B CN 1015553B CN 90100282 CN90100282 CN 90100282 CN 90100282 A CN90100282 A CN 90100282A CN 1015553 B CN1015553 B CN 1015553B
- Authority
- CN
- China
- Prior art keywords
- inoculant
- graphited
- strong
- cast iron
- phi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to a strong graphited cast iron inoculant which has strong nucleation capability and graphitization accelerating capability. The hardness value of a metal type phi 20 sample rod which adopts the inoculant is HB230, and a phi 7 sample rod can eliminate white iron. When the inoculant is used for producing a magnesium iron centrifugal casting pipe (phi 108*L200*t10), the average value of the body sampling elongation rate reaches more than 15 %.
Description
The present invention relates to the inoculation of Gray Iron agent.
During the permanent mold casting ironcasting,, can make foundry goods produce Quench, make to form more carbide in the foundry goods, thereby form casting defect and influence its performance because its speed of cooling is fast.For eliminating the spoken parts in traditional operas in the foundry goods and improving its tissue, adopt nucleating agent more.At present common nucleating agent mostly is to be base with silicon, graphite or carbon silicon, adds some other element more respectively, as calcium, aluminium, barium, zirconium, strontium, manganese, boron, bismuth, rare earth etc.Need use strong graphited inoculant during permanent mold casting, strong graphited inoculant commonly used is a Ferrosilicon inoculant Containing Strontium, elements such as the bismuth of adding, boron, aluminium, zirconium, cerium, antimony are also arranged, but these nucleating agents are with the permanent mold casting thin-section casting time, effect is also not obvious, promptly can't effectively reduce spoken parts in traditional operas, promote to give birth to nuclear.
The objective of the invention is to develop a kind of strong graphited inoculant,, improve as-cast structure, improve its mechanical property to reduce the chilling tendency of metal mold foundry goods (particularly thin-walled tube foundry goods).
Formation of the present invention is to add elements such as zirconium, boron, aluminium, magnesium, calcium, rare earth, its concrete composition following (weight percentage) on the ferrosilicon basis:
Si58～70% Zr0.5～2.5%
B0.6～1.5% Al5～11%
Mg0.5～1.5% Re0.3～1.0%
All the other are Fe for Ca0.5～2.0%.
The manufacture method of nucleating agent of the present invention is as follows:
1. mechanical mixing: after following alloy is crushed to the required granularity of applying unit, be mixed into the homogeneous mechanical mixture, can use by corresponding mixture ratio.
Rare earth ferrosilicomagnesium 9～14%
Ferro-boron 4.5～10%
Silicon-zirconium 44～69%
Commercial-purity aluminium 4.5～7%
75 ferrosilicon 36～0%
The composition of above-mentioned alloy is as follows:
Rare earth ferrosilicomagnesium-Si40.8% Re5.2% Mg7.96%
Ca1.4% is surplus to be Fe.
Ferro-boron-B14.2% Si1.39% is surplus to be Fe
Silicon-zirconium-Zr2.0% Si76% Ca2.1%
Al1.3% is surplus to be Fe.
Commercial-purity aluminium-technical pure
75 ferrosilicon-by Si75 requirement among the YB58-65.
When 75 ferrosilicon are got lower bound, other alloy cappings.During 75 ferrosilicon cappings, other compositions take off limit.
When the composition of used alloy and mentioned component are not inconsistent, be as the criterion with the final content scope according to the invention of each element in the nucleating agent.
2. smelting process: with ferrosilicon and zirconates refining silicon-zirconium, after being smelted into silicon-zirconium, add ferro-boron more earlier, ferrosilicon, the magnesium master alloy, rare earth alloy, aluminium alloy, calcium alloy, melting meets the requirements to composition and gets final product.Melting technology does not have particular requirement.
Can reduce casting hardness with nucleating agent of the present invention when the permanent mold casting, improve the foundry goods tissue, the hardness of φ 20 metal mold samples is 23OHB, and the metal mold sample of φ 7 can be eliminated the carbide (see figure 1).
When carrying out the die spinning ductile iron pipe with nucleating agent of the present invention, (t=10), the ferrite content 〉=75%(in the as-cast structure sees Fig. 2 for l=200, φ=108), mechanical property δ can reach 15.7%, δ
bBe 53Kg/mm
2
Fig. 1 is φ 7 metal mold sample metallographs.
Fig. 2 is the metallograph of rotary casting ductile iron pipe.
Claims (1)
1, a kind of is the iron casting inoculant of base with the ferrosilicon, it is characterized in that having added zirconium, boron, aluminium, magnesium, calcium, rare earth as complex element, and its concrete composition is (weight percentage):
Si58～70% Zr0.5～2.5%
B0.6～1.5% Al5～11%
Mg0.5～1.5% Re0.3～1.0%
All the other are Fe for Ca0.5～2.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100282 CN1015553B (en) | 1990-01-23 | 1990-01-23 | Cast iron strong graphited inoculant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100282 CN1015553B (en) | 1990-01-23 | 1990-01-23 | Cast iron strong graphited inoculant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043162A CN1043162A (en) | 1990-06-20 |
| CN1015553B true CN1015553B (en) | 1992-02-19 |
Family
ID=4876573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100282 Expired CN1015553B (en) | 1990-01-23 | 1990-01-23 | Cast iron strong graphited inoculant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015553B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441782C (en) * | 2002-10-07 | 2008-12-10 | 韩万烨 | Innovative prestressed scaffolding system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296226A (en) * | 2011-07-28 | 2011-12-28 | 徐州胜海机械制造科技有限公司 | Post inoculant for large-scale ductile iron casting and manufacture method thereof |
| CN103255334A (en) * | 2013-03-15 | 2013-08-21 | 成都宏源铸造材料有限公司 | Camshaft specialized inoculant |
| CN103146984B (en) * | 2013-04-07 | 2015-01-07 | 山东汇丰铸造科技股份有限公司 | High-intensity gray pig iron inoculator and preparation method thereof |
| EP3170578B1 (en) * | 2015-11-17 | 2021-06-30 | GF Casting Solutions Kunshan Co. Ltd. | Process for the production of a cast piece from cast iron with spheroidal graphite |
| CN106521296B (en) * | 2016-11-17 | 2018-05-04 | 石卫东 | Amorphous inovulant for spheroidal graphite cast-iron and preparation method thereof and application method |
| CN107385137A (en) * | 2017-06-27 | 2017-11-24 | 苏州楚博生物技术有限公司 | A kind of carbon silico-calcium inovulant |
-
1990
- 1990-01-23 CN CN 90100282 patent/CN1015553B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441782C (en) * | 2002-10-07 | 2008-12-10 | 韩万烨 | Innovative prestressed scaffolding system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043162A (en) | 1990-06-20 |
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