CN102990038A - Method for pouring high-strength and high-wear-resistance casting by mesh ceramic block and EPS (Expandable Polystyrene) compound group mould - Google Patents

Method for pouring high-strength and high-wear-resistance casting by mesh ceramic block and EPS (Expandable Polystyrene) compound group mould Download PDF

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Publication number
CN102990038A
CN102990038A CN2012103865150A CN201210386515A CN102990038A CN 102990038 A CN102990038 A CN 102990038A CN 2012103865150 A CN2012103865150 A CN 2012103865150A CN 201210386515 A CN201210386515 A CN 201210386515A CN 102990038 A CN102990038 A CN 102990038A
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CN
China
Prior art keywords
ceramic block
mould
casting
foam
strength
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Application number
CN2012103865150A
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Chinese (zh)
Inventor
刘玉满
刘翔
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刘玉满
刘翔
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Application filed by 刘玉满, 刘翔 filed Critical 刘玉满
Priority to CN2012103865150A priority Critical patent/CN102990038A/en
Publication of CN102990038A publication Critical patent/CN102990038A/en

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Abstract

The invention discloses a method for pouring a high-strength and high-wear-resistance casting by a mesh ceramic block compound EPS (Expandable Polystyrene) group mould. The method comprises the following steps of: coating high-performance coatings on a group mould compounded with EPS foams and a ceramic block; burning the foams compounded in the casting mould to be empty under negative pressure of dry sand; spraying strong flame to burn the mesh-shaped ceramic block to be at more than 600 DEG C; continually pouring high-strength liquid steel in a vibration field; and under the three conditions including negative pressure, vibration and high temperature, perfectly casting the liquid steel with the ceramic block in an all-pervasive and all-seam-seeping manner according to a pre-set process. According to the method disclosed by the invention, the critical defect of poor casting since casting liquid steel cannot be perfectly poured into each small gap with a sand mould or a regular evanescent mould can be overcome; and the ceramic block in the casting mould can be heated to be at more than 600 DEG C to remove cold-state condensed water on the surface of the ceramic block completely, thereby ensuring the perfect casting of the liquid steel and hot-state ceramic grains, and preventing the cold-state ceramic grains from being crushed by shock heating when the liquid steel is injected.

Description

The method of the compound EPS group of mesh ceramic block mould cast high-strength, high-anti-friction foundry goods

Technical field

The present invention relates to casting, specifically the method for the compound EPS group of a kind of mesh ceramic block mould cast high-strength, high-anti-friction foundry goods.

Background technology

China to the research of mesh ceramic block and high strength molten steel composite casting high anti-abrasion and high toughness foundry goods for many years, because sand mold and the technologic limitation of conventional evaporative pattern cavityless casting and technical shortcoming, mesh ceramic block composite casting molten steel for slightly bigger (more than 150 * 150 * 20mm) fails eventually, fatal part is that the gross imperfection of misrun (can't perfect whole casting close) is bordering on 100%, and micropore slit in the ceramic block (thin such as hair) molten steel perfection filling rate goes to zero.As everyone knows, the ceramic abrasive resistance of WC, SiC and so on is that present any antifriction alloy can't be compared, but its matter is crisp, can't independently bear huge impact load, and carbon steel or steel alloy and so on have very high intensity and impact flexibility, the two optimizes the compound wear resistance castings that must produce contemporary optimal performance, and this is international founder author pursuit in decades, also is the in the world active demand in the tens million of tons of large markets of wear resistance castings of every yearly consumption.

Summary of the invention

The present invention is the method that the compound EPS group of a kind of mesh ceramic block mould cast high-strength, high-anti-friction foundry goods is provided in order to overcome the deficiencies in the prior art.

The technical scheme that realizes the object of the invention is:

Adopt the coating of eps foam and ceramic block complex group mould with high-performance coating, mold burns the foam that is compound in wherein empty first under the dried sand negative-pressure condition, and the strong flame of spirt burns the ceramic block of mesh to more than 600 ℃, then in oscillator field, pour into a mould the high strength molten steel, in the situation that negative pressure, vibration, high temperature three conditions possess simultaneously, molten steel does not realize that by set technique perfectly casting is closed with ceramic block with all-pervasive, seamless with not oozing.

The method of the compound EPS group of a kind of mesh ceramic block mould cast high-strength, high-anti-friction foundry goods specifically comprises the steps:

(1) presses the foundry goods different structure and make mesh-structured abrasion-proof ceramic block, be prior art;

(2) press foundry goods different structure cutting eps foam and ceramic block complex group mould, foundry goods needs wear-resisting working position to lay ceramic block, and it is foam-formed that foundry goods needs the high strength position;

(3) prepare the high-performance coating of anti-burning, high temperature resistant, vibration resistance;

(4) applying coating is with dry: coated technique and conventional lost foam casting are produced identical, 2~3 layers of dip-coating or showerings, and successively oven dry (50~55 ℃ of baking temperature), the dried thickness of coating is 1.5~2.0mm;

(5) filling moulding: press the conventional vanning of evaporative pattern, back-up sand, sealing sandbox;

(6) burn the foam in the casting mold and make the ceramic block heat temperature raising: the sandbox to good seal is implemented negative pressure, vacuum degree-0.04~-0.06MPa, the Vibration on Start-up platform (50~200Hz amplitude<0.8mm), light foam with gas gun from dead head, and input a small amount of oxygen (oxygen cylinder commonly used in succession the oxygen cathete of Φ 2mm open air valve get final product), the fierce conflagration of foam in the type, ceramic block are warming up to (thoroughly eliminate moisture content, the favourable molten steel casting of high temperature is closed) more than 600 ℃;

(7) pour into a mould needed steel water: foam in the casting mold burns cinder keep stably vacuum degree and oscillator field after, pour into a mould immediately the steel water of set composition, can cancel negative pressure when being tending towards solidifying to foundry goods, stop vibration.

Prescription and the compound method of the described high-performance coating of step (3) are:

No. 5 lost foam paint specialist additive+100kg150 in 10kg Guilin~200 purposes palm fibre corundum+100kg water → in the mixer that per minute 150~200 turns, stir 1 hour → pulp can use.

In the preparation of the described high-performance coating of step (3), Guilin is for No. 5 the lost foam paint specialist additive, have high strength, highly-breathable, anti-burning, high temperature resistant technical performance with the coating of its preparation, the existing description is prior art in authorizing disclosed ZL200810080960.8 patent of invention.

This coating mould after testing result shows: normal temperature strength>1.5 MPa, normal temperature gas permeability>1.35cm 3/ Pamin is through 1000 ℃ of lower barbecue intensity 1.0 MPa after 10 minutes

Advantage of the present invention is:

1. thereby the present invention can overcome sand mold or conventional evaporative pattern cavityless casting steel water and can't perfect water into each micro gap casting and close bad critical defect, the mesh ceramic block in negative pressure, burn and can make under empty, the vibrational state that steel water is all-pervasive, seamless not to be oozed, the steel substrate position is densification, high strength, zero defect then, is that two kinds of unlike materials are perfectly optimized compound.

2. the present invention can be heated to the ceramic block in the casting mold more than 600 ℃, thoroughly eliminates the cohesion water on its surface " cold conditions ", guarantees that the perfect casting of molten steel and " hot " porcelain grain closes, prevented simultaneously cold conditions porcelain grain when molten steel injects because of shock heating split broken.

3. the present invention can ideally pour into a mould the composite wear-resistant casting parts that is widely used large, medium and small type abrasion-proof backing block, tup and various different structures at present most.

Description of drawings

Fig. 1 is large-scale bar group mould schematic diagram;

Fig. 2 is large-scale liner plate group mould schematic diagram.

Among the figure: 1, network structure ceramic block 2. foams.

The specific embodiment

With reference to Fig. 1-2, the method for the compound EPS group of a kind of mesh ceramic block mould cast high-strength, high-anti-friction foundry goods specifically comprises the steps:

(1) makes mesh-structured abrasion-proof ceramic block 1;

(2) press foundry goods different structure cutting eps foam 2 and ceramic block 1 complex group mould, foundry goods needs wear-resisting working position to lay ceramic block 1, and it is foam 2 moulding that foundry goods needs the high strength position;

(3) prepare the high-performance coating of anti-burning, high temperature resistant, vibration resistance; Its prescription and compound method are: No. 5 lost foam paint specialist additive+100kg150 in 10kg Guilin~200 purposes palm fibre corundum+100kg water → stir 1 hour → pulp can use in the mixer that per minute 150~200 turns

(4) applying coating is with dry: coated technique and conventional lost foam casting are produced identical, 2~3 layers of dip-coating or showerings, and successively oven dry (50~55 ℃ of baking temperature), the dried thickness of coating is 1.5~2.0mm;

(5) filling moulding: press the conventional vanning of evaporative pattern, back-up sand, sealing sandbox;

(6) burn the foam 2 in the casting mold and make ceramic block 1 heat temperature raising: the sandbox to good seal is implemented negative pressure, vacuum degree-0.04~-0.06MPa, the Vibration on Start-up platform (50~200Hz amplitude<0.8mm), light foam with gas gun from dead head, and input a small amount of oxygen (oxygen cylinder commonly used in succession the oxygen cathete of Φ 2mm open air valve get final product), foam 2 fierce conflagrations in the type, ceramic block 1 are warming up to (thoroughly eliminate moisture content, the favourable molten steel casting of high temperature is closed) more than 600 ℃;

(7) pour into a mould needed steel water: foam in the casting mold burns cinder keep stably vacuum degree and oscillator field after, pour into a mould immediately the steel water of set composition, can cancel negative pressure when being tending towards solidifying to foundry goods, stop vibration.

In the preparation of the described high-performance coating of step (3), Guilin is for No. 5 the lost foam paint specialist additive, have high strength, highly-breathable, anti-burning, high temperature resistant technical performance with the coating of its preparation, the existing description is prior art in authorizing disclosed ZL200810080960.8 patent of invention.

Claims (3)

1. the method for the compound EPS group of a mesh ceramic block mould cast high-strength, high-anti-friction foundry goods is characterized in that: specifically comprise the steps:
(1) makes mesh-structured abrasion-proof ceramic block by prior art;
(2) press foundry goods different structure cutting eps foam and ceramic block complex group mould, foundry goods needs wear-resisting working position to lay ceramic block, and it is foam-formed that foundry goods needs the high strength position;
(3) prepare the high-performance coating of anti-burning, high temperature resistant, vibration resistance;
(4) applying coating is with dry: coated technique and conventional lost foam casting are produced identical, 2~3 layers of dip-coating or showerings, and successively oven dry, bake out temperature is 50~55 ℃;
(5) filling moulding: press the conventional vanning of evaporative pattern, back-up sand, sealing sandbox;
(6) burn the foam in the casting mold and make the ceramic block heat temperature raising: the sandbox to good seal is implemented negative pressure, vacuum degree-0.04~-0.06MPa, the Vibration on Start-up platform (50~200Hz amplitude<0.8mm), light foam with gas gun from dead head, and input a small amount of oxygen, the fierce conflagration of foam in the type, ceramic block is warming up to more than 600 ℃;
(7) pour into a mould needed steel water: foam in the casting mold burns cinder keep stably vacuum degree and oscillator field after, pour into a mould immediately the steel water of set composition, can cancel negative pressure when being tending towards solidifying to foundry goods, stop vibration.
2. method according to claim 1, it is characterized in that: prescription and the compound method of the described high-performance coating of step (3) are:
No. 5 lost foam paint specialist additive+100kg150 in 10kg Guilin~200 purposes palm fibre corundum+100kg water → in the mixer that per minute 150~200 turns, stir 1 hour → pulp can use.
3. method according to claim 1, it is characterized in that: the dried thickness of step (4) coating is 1.5~2.0mm.
CN2012103865150A 2012-10-13 2012-10-13 Method for pouring high-strength and high-wear-resistance casting by mesh ceramic block and EPS (Expandable Polystyrene) compound group mould CN102990038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012103865150A CN102990038A (en) 2012-10-13 2012-10-13 Method for pouring high-strength and high-wear-resistance casting by mesh ceramic block and EPS (Expandable Polystyrene) compound group mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012103865150A CN102990038A (en) 2012-10-13 2012-10-13 Method for pouring high-strength and high-wear-resistance casting by mesh ceramic block and EPS (Expandable Polystyrene) compound group mould

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CN102990038A true CN102990038A (en) 2013-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962505A (en) * 2014-05-15 2014-08-06 河北钢铁股份有限公司唐山分公司 Vacuum negative-pressure casting process capable of ensuring casting quality of roll collar
CN104707972A (en) * 2015-02-15 2015-06-17 广东省工业技术研究院(广州有色金属研究院) Composite wear-resistant part preparation method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6286173A (en) * 1985-10-11 1987-04-20 Agency Of Ind Science & Technol Production of composite pipe
CN101314145A (en) * 2008-06-02 2008-12-03 淮阴工学院 Grinder hammerhead with ceramic wearing coat and casting method thereof
CN102274951A (en) * 2011-08-04 2011-12-14 广东新劲刚超硬材料有限公司 Method for synthesizing titanium carbide-base hard alloy coating on surfaces of castings in situ
CN102416440A (en) * 2011-11-11 2012-04-18 刘玉满 Casting method for liquid metal pouring of lost mold casting model in high-frequency micro-vibration field under negative pressure of dry sand
CN102513520A (en) * 2011-12-28 2012-06-27 昆明理工大学 Method for preparing heat-fatigue-resistance wear-resistance laminated particle reinforced composite material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6286173A (en) * 1985-10-11 1987-04-20 Agency Of Ind Science & Technol Production of composite pipe
CN101314145A (en) * 2008-06-02 2008-12-03 淮阴工学院 Grinder hammerhead with ceramic wearing coat and casting method thereof
CN102274951A (en) * 2011-08-04 2011-12-14 广东新劲刚超硬材料有限公司 Method for synthesizing titanium carbide-base hard alloy coating on surfaces of castings in situ
CN102416440A (en) * 2011-11-11 2012-04-18 刘玉满 Casting method for liquid metal pouring of lost mold casting model in high-frequency micro-vibration field under negative pressure of dry sand
CN102513520A (en) * 2011-12-28 2012-06-27 昆明理工大学 Method for preparing heat-fatigue-resistance wear-resistance laminated particle reinforced composite material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962505A (en) * 2014-05-15 2014-08-06 河北钢铁股份有限公司唐山分公司 Vacuum negative-pressure casting process capable of ensuring casting quality of roll collar
CN104707972A (en) * 2015-02-15 2015-06-17 广东省工业技术研究院(广州有色金属研究院) Composite wear-resistant part preparation method
CN104707972B (en) * 2015-02-15 2018-01-30 广东省材料与加工研究所 A kind of preparation method of composite wear-resistant part

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Application publication date: 20130327