CN104785744A - Centrifugal casting technology for high-pressure flange - Google Patents

Centrifugal casting technology for high-pressure flange Download PDF

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Publication number
CN104785744A
CN104785744A CN201510168163.5A CN201510168163A CN104785744A CN 104785744 A CN104785744 A CN 104785744A CN 201510168163 A CN201510168163 A CN 201510168163A CN 104785744 A CN104785744 A CN 104785744A
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CN
China
Prior art keywords
centrifugal casting
pressure flange
technology
roughing
centrifugal
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Pending
Application number
CN201510168163.5A
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Chinese (zh)
Inventor
李丽娟
王建武
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ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd
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ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd
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Application filed by ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd filed Critical ZHONGSHAN HONGCHENG RESEARCH TECHNICAL SERVICES Co Ltd
Priority to CN201510168163.5A priority Critical patent/CN104785744A/en
Publication of CN104785744A publication Critical patent/CN104785744A/en
Pending legal-status Critical Current

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Abstract

The invention provides a centrifugal casting technology for a high-pressure flange. The centrifugal casting technology includes the steps of smelting, centrifugal casting, cooling, the rough machining technology and the heat treatment process. The cooling speed of castings and the metal utilization rate are increased through centrifugal casting, under the condition that refining gas removing of alloy liquid is strengthened and the purity of the alloy liquid is improved, cooling of the alloy liquid can be strengthened through centrifugal casting, meanwhile, oxidized slag inclusions in the alloy liquid float on the inner surfaces of the castings under the action of a centrifugal force field, and directional solidification of the castings is achieved.

Description

A kind of high pressure flange centrifugal casting technique
Technical field
The present invention relates to flange and manufacture field, is a kind of high pressure flange centrifugal casting technique in particular.
Background technology
High pressure flange, since the 1950's is born, has been widely used in petroleum and petrochemical industry, oil-gas mining, industrial gas productions, petroleum refining, food processing, chemical engineering industry, environmental project, mineral and nuclear power, Aero-Space, shipping industry, synthetic fuel is processed, the field such as the oxidation of coal and liquefaction.In Chinese market, this series products relies on import completely, and none family domestic can design, produce, until 2005, this situation just by domestic Chengdu plant source machinery science and technology break.High pressure flange is mainly used in the installation of pipeline, and high pressure flange connection is the important connected mode of pipeline construction, and the main connection connected between tube and tube, plays important effect and value.High pressure flange connect be exactly two pipelines, pipe fitting or equipment, elder generation be fixed on a ring flange separately, between two ring flanges, add flange gasket, with bolted together, complete connection.
Summary of the invention
The invention provides a kind of high pressure flange centrifugal casting technique, for realizing object of the present invention, technical scheme of the present invention is as follows:
A kind of high pressure flange centrifugal casting technique, it is characterized in that, its concrete steps are:
(1) fusion process: copper, foundry returns are loaded in induction furnace simultaneously, rapid melting, when copper temperature reaches 850-900 DEG C, adds the Al-Fe intermediate alloy of preheating, add and fashionablely should intermediate alloy is pressed in copper liquid, carry out stirring to flux, add Al afterwards, with bell jar press-in zinc dichloride dehydration refinery by de-gassing, careful stirring, after foundry test is qualified, Ex-all scum silica frost, cast of coming out of the stove;
(2) centrifugal casting: during centrifugal casting, mould inner surface spary zinc oxide coating, pouring temperature controls at 800-900 DEG C, and adopt mode first quick and back slow, poring rate is 5-8kg/s, and centrifugal rotational speed is 630-680r/min;
(3) cool: be cooled to cast(ing) surface to be black dull redness, namely 600-700 DEG C of ability is shut down, the demoulding;
(4) roughing technique: roughing is carried out to foundry goods, during roughing, thin-walled place, flange both sides, diametric(al) one side allowance 3-5mm, the monolateral allowance 3-5mm of length direction;
(5) Technology for Heating Processing.
Preferably, in step (2), coating formula is zinc oxide, 2% waterglass of 12%, and surplus is water.
Preferably, in step (5) Technology for Heating Processing, hardening heat control 730-770 DEG C, temperature is at 590-630 DEG C.
Beneficial effect: the invention provides a kind of high pressure flange centrifugal casting technique, its step comprises fusion process, centrifugal casting, cooling, roughing technique, Technology for Heating Processing.Centrifugal casting improves the cooling velocity of foundry goods and the utilization rate of metal, in reinforcement aluminium alloy refining degasification, when improving aluminium alloy degree of purity, centrifugal casting can strengthen the cooling of aluminium alloy, simultaneously under the effect of centrifugal force field, make the oxide slag inclusion in aluminium alloy float on the inner surface of foundry goods, realize foundry goods directional solidification.
Detailed description of the invention
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with detailed description of the invention, setting forth the present invention further.
A kind of high pressure flange centrifugal casting technique, it is characterized in that, its concrete steps are:
(1) fusion process: copper, foundry returns are loaded in induction furnace simultaneously, rapid melting, when copper temperature reaches 850 DEG C, adds the Al-Fe intermediate alloy of preheating, add and fashionablely should intermediate alloy is pressed in copper liquid, carry out stirring to flux, add Al afterwards, with bell jar press-in zinc dichloride dehydration refinery by de-gassing, careful stirring, after foundry test is qualified, Ex-all scum silica frost, cast of coming out of the stove;
(2) centrifugal casting: during centrifugal casting, mould inner surface spary zinc oxide coating, pouring temperature controls at 800 DEG C, adopt mode first quick and back slow, poring rate is 5kg/s, and centrifugal rotational speed is 630r/min, coating formula is zinc oxide, 2% waterglass of 12%, and surplus is water;
(3) cool: be cooled to cast(ing) surface to be black dull redness, namely 600 DEG C of ability are shut down, the demoulding;
(4) roughing technique: roughing is carried out to foundry goods, during roughing, thin-walled place, flange both sides, diametric(al) one side allowance 3mm, the monolateral allowance 3mm of length direction;
(5) Technology for Heating Processing: wherein hardening heat control 730 DEG C, temperature is at 590 DEG C.
The invention provides a kind of high pressure flange centrifugal casting technique, its step comprises fusion process, centrifugal casting, cooling, roughing technique, Technology for Heating Processing.Centrifugal casting improves the cooling velocity of foundry goods and the utilization rate of metal, in reinforcement aluminium alloy refining degasification, when improving aluminium alloy degree of purity, centrifugal casting can strengthen the cooling of aluminium alloy, simultaneously under the effect of centrifugal force field, make the oxide slag inclusion in aluminium alloy float on the inner surface of foundry goods, realize foundry goods directional solidification.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or the conversion of equivalent flow process, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (3)

1. a high pressure flange centrifugal casting technique, is characterized in that, its concrete steps are:
(1) fusion process: copper, foundry returns are loaded in induction furnace simultaneously, rapid melting, when copper temperature reaches 850-900 DEG C, adds the Al-Fe intermediate alloy of preheating, add and fashionablely should intermediate alloy is pressed in copper liquid, carry out stirring to flux, add Al afterwards, with bell jar press-in zinc dichloride dehydration refinery by de-gassing, careful stirring, after foundry test is qualified, Ex-all scum silica frost, cast of coming out of the stove;
(2) centrifugal casting: during centrifugal casting, mould inner surface spary zinc oxide coating, pouring temperature controls at 800-900 DEG C, and adopt mode first quick and back slow, poring rate is 5-8kg/s, and centrifugal rotational speed is 630-680r/min;
(3) cool: be cooled to cast(ing) surface to be black dull redness, namely 600-700 DEG C of ability is shut down, the demoulding;
(4) roughing technique: roughing is carried out to foundry goods, during roughing, thin-walled place, flange both sides, diametric(al) one side allowance 3-5mm, the monolateral allowance 3-5mm of length direction;
(5) Technology for Heating Processing.
2. a kind of high pressure flange centrifugal casting technique according to claim 1, is characterized in that, in step (2), coating formula is zinc oxide, 2% waterglass of 12%, and surplus is water.
3. a kind of high pressure flange centrifugal casting technique according to claim 1, is characterized in that, in step (5) Technology for Heating Processing, hardening heat control 730-770 DEG C, temperature is at 590-630 DEG C.
CN201510168163.5A 2015-04-11 2015-04-11 Centrifugal casting technology for high-pressure flange Pending CN104785744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510168163.5A CN104785744A (en) 2015-04-11 2015-04-11 Centrifugal casting technology for high-pressure flange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510168163.5A CN104785744A (en) 2015-04-11 2015-04-11 Centrifugal casting technology for high-pressure flange

Publications (1)

Publication Number Publication Date
CN104785744A true CN104785744A (en) 2015-07-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105695848A (en) * 2015-11-29 2016-06-22 郑臣钏 Flange casting process
CN106011427A (en) * 2016-06-23 2016-10-12 含山县清溪德胜铸造厂 Heat treatment technology for heightened flange casting
CN108326271A (en) * 2018-03-28 2018-07-27 徐州东鑫铸造有限公司 A kind of casting production process of flange
CN108580830A (en) * 2018-05-10 2018-09-28 巢湖市南特精密制造有限公司 A kind of method of processing flange

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008264865A (en) * 2007-04-16 2008-11-06 Honda Seiki Kk Horizontal centrifugal casting machine for rapid solidification
CN102274944A (en) * 2011-08-30 2011-12-14 吴江市天龙机械有限公司 Process for forming aluminium-alloy casting motor flange plate
CN103056323A (en) * 2012-12-12 2013-04-24 青岛三合山精密铸造有限公司 Centrifugal casting method of flange casting piece
CN103509965A (en) * 2013-03-29 2014-01-15 洛阳洛北重工机械有限公司 Process for smelting aluminum-iron bronze
CN103521732A (en) * 2013-03-29 2014-01-22 洛阳洛北重工机械有限公司 Aluminum-bronze porcelain bushing flange centrifugal casting process
CN104368781A (en) * 2014-08-29 2015-02-25 宿松恒达电气配件有限公司 High-pressure flange centrifugal casting technology

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008264865A (en) * 2007-04-16 2008-11-06 Honda Seiki Kk Horizontal centrifugal casting machine for rapid solidification
CN102274944A (en) * 2011-08-30 2011-12-14 吴江市天龙机械有限公司 Process for forming aluminium-alloy casting motor flange plate
CN103056323A (en) * 2012-12-12 2013-04-24 青岛三合山精密铸造有限公司 Centrifugal casting method of flange casting piece
CN103509965A (en) * 2013-03-29 2014-01-15 洛阳洛北重工机械有限公司 Process for smelting aluminum-iron bronze
CN103521732A (en) * 2013-03-29 2014-01-22 洛阳洛北重工机械有限公司 Aluminum-bronze porcelain bushing flange centrifugal casting process
CN104368781A (en) * 2014-08-29 2015-02-25 宿松恒达电气配件有限公司 High-pressure flange centrifugal casting technology

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105695848A (en) * 2015-11-29 2016-06-22 郑臣钏 Flange casting process
CN106011427A (en) * 2016-06-23 2016-10-12 含山县清溪德胜铸造厂 Heat treatment technology for heightened flange casting
CN108326271A (en) * 2018-03-28 2018-07-27 徐州东鑫铸造有限公司 A kind of casting production process of flange
CN108580830A (en) * 2018-05-10 2018-09-28 巢湖市南特精密制造有限公司 A kind of method of processing flange

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