CN102140617A - Method for sulfurizing iron lift tube for low pressure casting - Google Patents
Method for sulfurizing iron lift tube for low pressure casting Download PDFInfo
- Publication number
- CN102140617A CN102140617A CN 201110062492 CN201110062492A CN102140617A CN 102140617 A CN102140617 A CN 102140617A CN 201110062492 CN201110062492 CN 201110062492 CN 201110062492 A CN201110062492 A CN 201110062492A CN 102140617 A CN102140617 A CN 102140617A
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- China
- Prior art keywords
- riser pipe
- lift tube
- pressure casting
- iron
- aluminum
- 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.)
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Abstract
The invention discloses a method for sulfurizing iron lift tube for low pressure casting of aluminum and magnesium alloys, which comprises the following steps of: thoroughly removing surface dirt and rust of the lift tube by using a sand blasting method, coating slurry consisting of 70 percent of sulphur powder, 25 percent of boric acid and 5 percent of water glass on the treated surface, wrapping an aluminum foil, putting into an oven with the temperature of between 500 and 550 DEG C, keeping the temperature for 8 to 10 hours, and ensuring that sulphur in the slurry is reacted with iron to form FeS which is not infiltrated with aluminum so as to prevent the aluminum from reacting with the lift tube to protect the lift tube.
Description
Technical field
What the present invention relates to is a kind of aluminium, magnesium alloy low-pressure casting irony riser pipe sulfurized method of being used for, and belongs to the liquid condition shaping and the field of surface treatment of metallic substance.
Background technology
Riser pipe is a critical part in the low-pressure die casting plant, usually cylinder iron or weldless steel tube and steel plate be welded, because it directly is immersed in the aluminium liquid, be subjected to the etch of high temperature aluminum liquid and wash away, iron and reactive aluminum make the very fast damage of riser pipe, and iron ion directly enters the FeAl3 that aluminium liquid and aluminium generate strip simultaneously, become the most deleterious tissue in the aluminium casting, it isolates matrix, worsens mechanical property, and its tensile strength and elongation sharply descend.
Enterprise takes to brush CaCO3 in producing usually at present, talcum powder stops the iron in the riser pipe directly to contact with aluminium; but aluminium liquid washes away inside and outside riser pipe down repeatedly when long term high temperature (720~750 ℃) and low-pressure casting; this coating is very easy peels off, and does not have provide protection.
Summary of the invention
Studies show that; iron crucible, instrument and riser pipe surface and form certain thickness FeS layer; because FeS and aluminium do not soak into; stopped the etch of aluminium to iron, both protected iron crucible and riser pipe also to avoid the iron that increases of alloy, once the someone attempted adding sulphur iron ore in crucible in the past; in the crucible temperature-rise period; sulphur in the sulfurous iron ore discharges with crucible and generates FeS, facts have proved that this method affect factor is too many, and cure efficiency is not good.
Purpose of the present invention is at the deficiency of sulfurous iron ore method and seek a kind of material and sulfuration process of new sulfidizing.
Technical scheme of the present invention is as follows:
The prescription of irony riser pipe vulcanizing agent is: 70% SULPHUR POWDER, 25% boric acid, 5% water glass water is an amount of.
Vulcanizing agent configuration technology is: SULPHUR POWDER and boric acid are fully mixed, and water glass dissolves in the hot water, then SULPHUR POWDER and boric acid miscellany are added, and it is stand-by to stir.
Irony riser pipe sulfidizing technology: riser pipe is embroidered with the thorough de-iron dirt of method and the iron of sandblast or ball blast, blows clean with pressurized air, and vulcanizing agent is sprayed on surfaces externally and internally, dry in the shade, and then spray one deck, and repeatable operation 2~3 times, coat-thickness reaches 1.5~3.0mm, after drying in the shade, outside surface is tight with 0.5mm aluminium foil parcel, puts into baking oven, and oven temperature is controlled between 500~550 ℃, heated 8~10 hours, and made it generate certain thickness FeS layer.
Embodiment
Riser pipe bore (external diameter) 110mm, wall thickness 5mm, the steel plate of A3 seamless tube and thickness 10mm is welded, and length is 1200mm.Riser pipe has just pressed sand blasting sand to handle with 20~40 purposes palm fibre, thoroughly removes iron and embroiders, and blows clean with clean pressurized air then, riser pipe is placed on is heated to 120~150 ℃ in the box-type furnace.Measured SULPHUR POWDER of scale and boric acid is fully mixed, and water glass dissolves in the hot water, then adds the miscellany of sulphur semi-annular jade pendant powder and boric acid, makes it to become the vulcanizing agent slurry.In box-type furnace, take out riser pipe, spray and spray the second layer again after the first layer vulcanizing agent (slurry) waits its drying, the baking oven of putting into 15 () ℃ makes its drying, and then sprays the 3rd layer, wrap up with the 0.5mm aluminium foil dry back, and two ends of riser pipe are also tight with Aluminium Foil Package.Put into baking oven, be warmed up to 520 ℃, be incubated 8 hours, the vulcanizing agent residue is removed with brush in the cooling back, and is stand-by.This riser pipe uses 120 heats continuously.After testing, this sulfurized layer reaches 0.35mm, illustrates that this method is effective, and is easy to use.
Claims (2)
1. a low-pressure casting is characterized in that its composition is a SULPHUR POWDER 70%, boric acid 25%, water glass 5% and an amount of water with irony riser pipe vulcanizing material.
2. a low-pressure casting is with irony riser pipe sulfuration process; it is characterized in that removing the dirt activating surface with the method for sandblast or ball blast; brush irony riser pipe sulfuration oar material then; the outside wraps foil sealing; Heating temperature to 500~550 ℃ also kept 8~10 hours, made the riser pipe surface reaction generate the FeS protective layer.
Priority Applications (1)
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CN 201110062492 CN102140617A (en) | 2011-03-10 | 2011-03-10 | Method for sulfurizing iron lift tube for low pressure casting |
Applications Claiming Priority (1)
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CN 201110062492 CN102140617A (en) | 2011-03-10 | 2011-03-10 | Method for sulfurizing iron lift tube for low pressure casting |
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CN102140617A true CN102140617A (en) | 2011-08-03 |
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CN 201110062492 Pending CN102140617A (en) | 2011-03-10 | 2011-03-10 | Method for sulfurizing iron lift tube for low pressure casting |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105315009A (en) * | 2015-11-30 | 2016-02-10 | 衡阳凯新特种材料科技有限公司 | Coating for silicon nitride lift tubes and preparation method thereof |
CN106631171A (en) * | 2016-10-10 | 2017-05-10 | 汉江弘源襄阳碳化硅特种陶瓷有限责任公司 | Coating for liquid lifting pipe made of silicon nitride combined with silicon carbide and preparation method of coating |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080240879A1 (en) * | 2007-03-27 | 2008-10-02 | Varel International, Ind., L.P. | Process for the production of an element comprising at least one block of dense material constituted by hard particles dispersed in a binder phase: application to cutting or drilling tools |
CN101565810A (en) * | 2009-06-09 | 2009-10-28 | 天津大学 | Preparation method and device for industrial microwave heating diffusion coating |
-
2011
- 2011-03-10 CN CN 201110062492 patent/CN102140617A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080240879A1 (en) * | 2007-03-27 | 2008-10-02 | Varel International, Ind., L.P. | Process for the production of an element comprising at least one block of dense material constituted by hard particles dispersed in a binder phase: application to cutting or drilling tools |
CN101565810A (en) * | 2009-06-09 | 2009-10-28 | 天津大学 | Preparation method and device for industrial microwave heating diffusion coating |
Non-Patent Citations (2)
Title |
---|
《热处理》 20061231 董玉明 低温渗硫研究 第49,51页 1-2 , 第2期 * |
《轴承》 20031231 刘红霞 固体渗硫处理工艺在冷镦模具中的应用 第40页 2 , 第4期 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105315009A (en) * | 2015-11-30 | 2016-02-10 | 衡阳凯新特种材料科技有限公司 | Coating for silicon nitride lift tubes and preparation method thereof |
CN105315009B (en) * | 2015-11-30 | 2017-07-18 | 衡阳凯新特种材料科技有限公司 | Coating for silicon nitride stalk and preparation method thereof |
CN106631171A (en) * | 2016-10-10 | 2017-05-10 | 汉江弘源襄阳碳化硅特种陶瓷有限责任公司 | Coating for liquid lifting pipe made of silicon nitride combined with silicon carbide and preparation method of coating |
CN106631171B (en) * | 2016-10-10 | 2019-06-07 | 汉江弘源襄阳碳化硅特种陶瓷有限责任公司 | The coating and preparation method thereof of silicon nitride combined silicon carbide ceramic lift tube |
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Application publication date: 20110803 |