CN1101382A - Antioxidizing cast iron material for glass mould - Google Patents
Antioxidizing cast iron material for glass mould Download PDFInfo
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- CN1101382A CN1101382A CN 93112190 CN93112190A CN1101382A CN 1101382 A CN1101382 A CN 1101382A CN 93112190 CN93112190 CN 93112190 CN 93112190 A CN93112190 A CN 93112190A CN 1101382 A CN1101382 A CN 1101382A
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- cast iron
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- graphite
- antioxidizing
- iron material
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Abstract
The D-type graphite cast iron material which is used to make mould in glass industry has its metallographic metrix of flake pearlite (>90%) and D-type graphite form. After thermal treatment, its sigmab=260-276 MPa, sigmabb=476-486 MPa and HB=210-220. The material features better antioxidizing, antigrowing, anti-thermofatigue and heat conductivity. If it is used on high-temp., high-speed bottle machine, the mould has service life of 600-700 thousands times.
Description
The present invention relates to the cast iron materials of moulds such as a kind of mould for glass bottle material, particularly Beer Bottle, beverage bottle, medical vials.
Glass mold is that glasswork is produced indispensable process spare part, and in the glasswork moulding process, mould is frequent to be contacted with the glass metals that dissolve more than 1100 ℃, through effects such as oxidated, growth and thermal fatigues.Particularly on high-speed bottle machine, use, more need the cast iron materials of performances such as higher oxidation-resistance, the long property of antibiosis and thermal fatigue resistance.
The at present domestic CrMoCu cast alloy iron that generally adopts is made glass mold.Graphite form slabbing in the metallographic structure of this kind cast iron, flake graphite cast iron, ubiquity easily oxidation at high temperature, cause the mold cavity poor surface smoothness, and work-ing life is short, is generally ten thousand times/mould of 20-30.China had introduced more than 60 two tear drop ranks machine production line in recent years, and mould mostly is import greatly, and the import mould generally adopts NiMo and CrMo alloy material or middle silicon alloy cast iron, and price is high.
It is low that purpose of the present invention will solve domestic die life exactly, thereby substitute import, and a kind of new die material that is applicable to the high temperature and high speed bottle-making machine that provides.This material should have the long property of good oxidation-resistance, antibiosis and wear resistance and thermal conductivity preferably.And easily repair long service life.
In order to reach purpose of the present invention, design a kind of cast iron composition, add a certain amount of alloying element, pearlitic structure is not being decomposed more than 700 ℃, tangible oxidation and growth do not take place yet.Graphite form is selected the D type for use, and D type graphite is the dendrite point-like, and it is to grow between the austenite dentrite.Austenitic continuity has been isolated the continuity of graphite flake, and the slit between D type graphite and matrix is littler than the slit between flake graphite and matrix.Graphite is more tiny, and the oxidation-resistance of cast iron more improves and improves.So the D type Graphite Iron Cast has good oxidation-resistance, antibiosis long property, thermal fatigue resistance and thermal conductivity.It is a kind of excellent material of making glass mold.By a large amount of experiment and on probation, determined D China ink cast iron optimal components (weight %):
C 3.2-3.6, Si 1.8-2.2, Mn 0.4-0.8,
P <0.1,S<0.1, Cr 0.3-0.6, Bi 0.006-0.009,
Sb 0.04-0.07, B 0.008-0.011, Sn 0.05-0.08,
R
E0.03-0.05 surplus is an iron.Metallographic structure: matrix is fine pearlite (＞90%), and graphite form is a D type graphite.
Chromium is the main alloy element that the present invention adds.Add chromium and can impel pearlite matrix to form and crystal grain thinning, improve wear resistance and improve thermotolerance, and increase creep resistance etc.This is because it produces the protective oxide film (Cr2O3) of one deck densification at cast(ing) surface, thereby has resistance of oxidation, even under comparatively high temps, organizes also very stable.The stability of tissue is a key property of high temperature cast iron.But when Cr added 1.0%, the flowability of molten iron reduced, and chill depth increases, and was difficult for processing, and free carbide occurred, influenced its performance.Be lower than 0.3%, either pearlite occurred reduces, and wear resistance reduces.So selecting Cr content is 0.3-0.6%.
Bismuth is a surface active element, but crystal grain thinning and graphite.Add bismuth, condensate depression is increased, the austenite speed of growth is accelerated, and has caused the crystalline growth of graphite of withe, can obtain tiny D type graphite.But when Bi content＞0.009%, white structure will occur, and be difficult to processing, content is lower than 0.006%, is more difficult to get D China ink tissue.So Bi content is defined as 0.006-0.009%.
Tin is a kind of element of stablizing pearlitic structure, and can increase perlite, content and raising wear resistance and high-temperature behavior.It does not change its shape in graphite, and does not increase chilling tendency.After adding tin, in mesophilic range, also have long ability of antibiosis and good thermostability preferably.When tin content surpasses 0.1%, bigger to the graphite form influence, not only can not generate the D China ink, the sheet China ink is grown up.Be lower than 0.05%, influence pearlitic content and refinement stable and tissue.So Sn content is defined as 0.05-0.08%.
Antimony is to facilitate cast iron to generate the alloying element of pearlitic structure, adds an amount of antimony and can stablize and the refine pearlite tissue, and strengthen its wear resistance.The antimony of trace can obtain thin shape pearlitic structure, but adding is excessive slightly, and mechanical property descends, and fragility increases.Content is low excessively, influences the stability of pearlitic structure, at high temperature easily produces ferrite.So determine that Sb content is 0.04-0.07%.
The boron of trace, little to graphite in the cast iron microstructure and pearlite matrix influence, but the phase is not separated out a large amount of eutectic cells solidifying to make cast iron, crystal boundary is the carbide containing boron phase of suspension shape or continuous net-shaped distribution, this microhardness that contains B carbide phase is than general Fe3C height, so can improve the wear resistance of cast iron.And can make its graphite and carbide become very tiny, and be evenly distributed, cross section susceptibility is little.When boron surpasses 0.011%, hinder the graphite refinement, easily form spoken parts in traditional operas, be difficult to processing.Be lower than at 0.008% o'clock, its wear resistance reduces significantly.So determine that B content is 0.008-0.011%.
R
EThe interpolation of alloy can significantly purify liquation and refine austenite crystal grain, and improves its performance.R
EAlso be surface active element, in the graphite crystallization process, can concentrate to a certain extent, and influence alternate tension force, formed the cold-peace interface stability in the certain areas in forward position, interface.
The present invention can handle by conventional smelting, casting and aging anneal and obtain, and can adopt cupola furnace or medium-frequency induction furnace melting, tide mould sand casting, following chill core casting.Teeming temperature is 1400-1420 ℃.Alloying elements cr, R
EAdd in the stove, other alloying element adds in the hot metal ladle.Aging anneal 760-780 ℃ * 6 hours, slow cooling.As cast condition mechanical property of the present invention is: 6 b260-276MPa, 6 bb 476-486MPa, HB210-220.
Further specify performance of the present invention and effect with embodiment below.
Embodiment 1: sample of the present invention has been made 30 pairs on 640ml Beer Bottle mould, and (machine speed is 6.9 a times/mould branch) is on probation on ten sections two tear drop ranks machines of Zibo City, Shandong Province Nan Ding glasswork U.S. EMHART, and the life-span is 680,000 a times/mould.Its composition and performance are: C 3.4%, and Si 2.1%, and Mn 0.59%, and S 0.058%, and P 0.09%, and Cr 0.52%, and Sb 0.067%, and Sn 0.08%, and Bi 0.007%, and B 0.009%, R
E0.04%.
6?b＝265MPa，6?bb＝480MPa，HB＝212。
Embodiment 2: sample of the present invention has been made 20 pairs on 100ml beverage bottle mould, and (machine speed is 12 a times/mould branch) is on probation on Qingdao shakes the two tear drop single head rotary type bottle-making machines of D-LB type of inferior glasswork company limited Japan import, and the life-span is 700,000 a times/mould.Its composition and performance are as follows:
C 3.48% Si 1.98% Mn 0.52% S 0.051%
P 0.082% Cr 0.48% Sb 0.056% Sn 0.07%
Bi 0.006% B 0.008% R
E0.032%。
6b=260MPa, 6bb=475MPa HB=194。
By above-mentioned test and probationary certificate, the present invention has higher oxidation-resistance, antibiosis long property, thermal fatigue resistance and good wear resistance, is a kind of ideal glass mold material.
The present invention does not find and the identical cast iron materials of composition of the present invention as yet through patent retrieval both at home and abroad.
Of the present invention practicing saved a large amount of spare part expenses with can be the user, and with time Zhi Daliang foreign exchange, economic benefit and social benefit are very significant.
Claims (1)
- A kind of D type Graphite Iron Cast material that is applicable to mould for glass bottle, it is characterized in that: chemical ingredients (weight %) is:C 3.2-3.6 Si 1.8-2.2Mn 0.4-0.8 P ＜0.1 S＜0.1Cr 0.3-0.6 Bi 0.006-0.B 0.008-0.011 Sb 0.04-0.07Sn 0.05-0.08 R E0.03-0.05Surplus is an iron.Metallographic structure: matrix is fine pearlite (＞90%), and graphite form is a D type graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112190 CN1101382A (en) | 1993-10-06 | 1993-10-06 | Antioxidizing cast iron material for glass mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112190 CN1101382A (en) | 1993-10-06 | 1993-10-06 | Antioxidizing cast iron material for glass mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1101382A true CN1101382A (en) | 1995-04-12 |
Family
ID=4989913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112190 Pending CN1101382A (en) | 1993-10-06 | 1993-10-06 | Antioxidizing cast iron material for glass mould |
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| CN (1) | CN1101382A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383075C (en) * | 2006-01-10 | 2008-04-23 | 西安理工大学 | Rust-proof cast iron glass craft production method |
| CN102560230A (en) * | 2012-02-28 | 2012-07-11 | 常熟市精工模具制造有限公司 | Method for smelting D-type graphite alloy cast iron glass mould by replacing pig iron with scrap steel |
| CN102676908A (en) * | 2011-03-10 | 2012-09-19 | 常熟市精工模具制造有限公司 | Rare earth inoculant-promoted D-type graphite alloy glass mold |
| CN103805832A (en) * | 2012-11-13 | 2014-05-21 | 现代摩比斯株式会社 | Nodular graphite cast iron with high strength and high toughness and parts of an automobile manufactured from the same |
-
1993
- 1993-10-06 CN CN 93112190 patent/CN1101382A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383075C (en) * | 2006-01-10 | 2008-04-23 | 西安理工大学 | Rust-proof cast iron glass craft production method |
| CN102676908A (en) * | 2011-03-10 | 2012-09-19 | 常熟市精工模具制造有限公司 | Rare earth inoculant-promoted D-type graphite alloy glass mold |
| CN102560230A (en) * | 2012-02-28 | 2012-07-11 | 常熟市精工模具制造有限公司 | Method for smelting D-type graphite alloy cast iron glass mould by replacing pig iron with scrap steel |
| CN103805832A (en) * | 2012-11-13 | 2014-05-21 | 现代摩比斯株式会社 | Nodular graphite cast iron with high strength and high toughness and parts of an automobile manufactured from the same |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |