CN108580795A - A kind of process that antiwear heat resisting performance composite material steel-casting can be improved - Google Patents
A kind of process that antiwear heat resisting performance composite material steel-casting can be improved Download PDFInfo
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- CN108580795A CN108580795A CN201810622091.0A CN201810622091A CN108580795A CN 108580795 A CN108580795 A CN 108580795A CN 201810622091 A CN201810622091 A CN 201810622091A CN 108580795 A CN108580795 A CN 108580795A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/167—Mixtures of inorganic and organic binding agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Abstract
The invention discloses a kind of processes that antiwear heat resisting performance composite material steel-casting can be improved,Including drystone sand,Magnesia chrome spinel,Magnoferrite,Magnesium aluminate spinel,Nice foundry sand,Composite material made of the raw materials such as corundum B and inorganic binder A and organic binder B,Cast model is made using the composite material,To instead of lost foam pattern,Effectively avoid the problem that lost foam pattern damages,To improve the integrality of casting,And after cast model is made in composite material,Its material melts under the action of molten iron,And it is attached to the surface of casting,Improve the wear-resisting property of cast(ing) surface,The later stage is facilitated to carry out polishing repairing simultaneously,Wear-resisting particle is added in ironcasting,Improve the wearability of casting,Simultaneously because molten iron contacts sand mold,Cooling rate is very fast,Promote white iron,Product hardness is set to further increase,Reduce molten iron dosage simultaneously,Reduce production cost,Improve the convenience used.
Description
Technical field
The present invention relates to casting techniques field, specially a kind of work that antiwear heat resisting performance composite material steel-casting can be improved
Process.
Background technology
During potassium steel wear resistance castings, since technological operation is improper so that lost foam pattern be susceptible to crackle,
The case where Paint Falling, causes high temperature liquid iron to enter the gap of the molding sand of surrounding, to which molten iron and molding sand growth are integrated, casting
It needs the methods of manually to polish to it, be welded after molding so that could use after removing surface is clean.
But in polishing, due to molten iron and molding sand at mixture, hardness is very big, and when manual polishing is beaten with grinding wheel
Mill, and since cast(ing) surface is smooth so that cleaning labor intensity is very big, and cleaning efficiency is low.
In addition all it is to use that alloy is added in the pig iron, and operate and require according to respective castings production building site skill now, that is, exists
Fusing or casting are made product and are heat-treated, and the wear-resistant material of thawing are attached to the surface of casting, such operation makes
It must be heat-treated that power consumption is larger, and need to improve the heat resistance of casting, it is therefore desirable to a kind of antiwear heat resisting performance composite material
Steel-casting solves problem above.
Invention content
The purpose of the present invention is to provide a kind of process that antiwear heat resisting performance composite material steel-casting can be improved, with
It solves to propose that the case where lost foam pattern is susceptible to crackle, Paint Falling causes casting to be molded rear surface in above-mentioned background technology
It is not easily cleaned, and the poor problem of heat resistance of casting.
To achieve the above object, the present invention provides the following technical solutions：Antiwear heat resisting performance composite material can be improved in one kind
The process of steel-casting, including
Step 1：Material is produced
Dispensing A：Ores and its calcined products such as siliceous sand, bauxite, kyanite, zircon sand, chrome ore, magnesia, olivine,
Coke is added in dispensing A, is produced after electric smelting and magnesia chrome spinel, magnoferrite, magnesium aluminate spinel, mound is made
The raw materials such as sand, corundum B；
Step 2：The preparation of binder
Inorganic binder A is using Ludox, waterglass（Sodium metasilicate）, brine, phosphoric acid and phosphate（Sodium tripolyphosphate, six inclined phosphorus
Sour sodium, aluminium dihydrogen phosphate etc.）, aluminous cement（CA50、CA70、CA80）One or more of,
Organic binder B is using syrup, dextrin, sodium carboxymethylcellulose, polyvinyl acetate emulsion, conjunction fat, spent pulping liquor, phenolic aldehyde
Resin（Solid and liquid）, polyacrylamide, sodium alginate, polyvinyl butyral, sesbania it is glued, without silester, synthesis
One or more of resin；
Step 3：The preparation of composite material raw material
Raw material B is added in blender, then will be added in blender with the binder of the 0.2-6% of raw material B content, is stirred
It mixes uniformly, and suitable water is added according to the bond degree of finished product, stir into uniformly；
Step 4：The making of model
Thickness and shape, the size and casting of size are used according to the wear-resistant surface of the shape of product of cast unit or cast product
Size is fabricated to mould plus the shrinking percentage of casting, and can be made into product entirety or localized mode according to the needs of production
Tool,
Composite material raw material is put into mold, the shape of needs is made, carries out solidification or drying and shaping so that finished surface is
Uniform pores shape so as to molten iron flow, and is made model inner casing in composite material and adds reinforcing rib, moved to prevent composite material
It is dynamic；
Step 5：Product pours into a mould the making of model
A, sand mold, metal mold, etc. be free cavity model casting：It is suitable in cavity that the good mold of its pre-production is put in
Position, the reinforcing rib for being used in combination its included fixes.Then original technique is pressed in the product model cavity inside being full of or part
Mould cast model is made,
B, the models full mold such as lost foam casting, wax-pattern essence casting（Without cavity）Casting：Composite material model is placed in physically
As a part for cast product.Again will or later again to the materials such as its surface layer dry sand or foam powder, paraffin to surface into
It applies and coats again after row processing, to ensure surface smoothness,
A and B coat high-temperature resistant coating in two cast model surfaces, and it is aerial with 50-60 DEG C of drying to be sent into baking room so that casting
Heating dewaxing forms the sky with composite material after part model becomes evaporative pattern cast model or the hardening of wax-pattern essence casting surface coating
Chamber cast model, so that the cast model substitutes evaporative pattern；
Step 6：Casting manufactures
After carrying out above, pouring and riser systems are made by the manufacturing technique requirent of the casting,
Step 7：According to by cast steel in composition or material according to cast product in component requirements, be fused into qualified molten iron,
Calmness is poured after skimming；
Step 8：Feeding
After product is carried out, by automatic mold rollover unit mould turnover, product is taken out from sandbox, and it is cleared up, it can be according to wanting
It asks and decides whether to be heat-treated according to casting process requirement.
Preferably, raw material B is at least sieved 2 times in the step 1, and the granularity of the raw material B in step 3 is 0.212mm-
10mm。
Preferably, reinforcing rib uses steel or iron wire in the step 4, plane reticular or support rack-like is made, according to casting
Muscle diameter is set as 0.2-20mm by the size of part, and reinforcing rib can be projected into the outer 0.5--60mm of model, when preventing molten iron from pouring into
Wash out model, mobile composite material model.
Preferably, it carries out 3 times coating in the step 5 in total to cast model to be coated with, and first pass is coated with using brush
It applies, is coated with for latter twice using dip coating, and coating layer thickness is 1-2mm.
Preferably, temperature is poured into a mould at 50-100 DEG C higher than manufacturing technique requirent pouring temperature in the step 8, and
Cast is poured into a mould in such a way that slow-to-fast-is slow into Line Continuity.
Compared with prior art, the beneficial effects of the invention are as follows：Antiwear heat resisting performance composite material steel-casting can be improved in this
Process, casting pattern is made using composite material, without being manufactured using foam type evaporative pattern, effectively keeps away
Exempt from the problem of molding sand is collapsed by molten iron impact, and is stirred using organic bond and inorganic bond in compound raw material
Mixing, to effectively raise the intensity of cast model, avoids being broken up by molten iron, while being provided with reinforcement in cast model
Muscle further improves the stability of cast model；
After the casting pattern gasification produced, composite material can be attached to the surface of molten iron cooling and shaping, improve cast(ing) surface
Flintiness and wear-resisting property, facilitate the later stage to carry out polishing repairing, and wear-resisting particle is added in ironcasting, improve the wear-resisting of casting
Property, simultaneously because molten iron contacts sand mold, cooling rate is very fast, promotes white iron, and product hardness is made to further increase, simultaneously
Reduce molten iron dosage, reduce production cost, improves the convenience used.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution：A kind of technique side that antiwear heat resisting performance composite material steel-casting can be improved
Method, including
Step 1：Material is produced
Dispensing A：Ores and its calcined products such as siliceous sand, bauxite, kyanite, zircon sand, chrome ore, magnesia, olivine,
Coke is added in dispensing A, is produced after electric smelting and magnesia chrome spinel, magnoferrite, magnesium aluminate spinel, mound is made
The raw materials such as sand, corundum B；
Step 2：The preparation of binder
Inorganic binder A is using Ludox, waterglass（Sodium metasilicate）, brine, phosphoric acid and phosphate（Sodium tripolyphosphate, six inclined phosphorus
Sour sodium, aluminium dihydrogen phosphate etc.）, aluminous cement（CA50、CA70、CA80）One or more of,
Organic binder B is using syrup, dextrin, sodium carboxymethylcellulose, polyvinyl acetate emulsion, conjunction fat, spent pulping liquor, phenolic aldehyde
Resin（Solid and liquid）, polyacrylamide, sodium alginate, polyvinyl butyral, sesbania it is glued, without silester, synthesis
One or more of resin；
Step 3：The preparation of composite material raw material
Raw material B is added in blender after stirring evenly, then blender will be added to the binder of the 0.2-6% of raw material B content
It is interior, it is stirred for uniformly, and suitable water is added according to the bond degree of finished product, stirs into uniformly；
Step 4：The making of model
Thickness and shape, the size and casting of size are used according to the wear-resistant surface of the shape of product of cast unit or cast product
Size is fabricated to mould plus the shrinking percentage of casting, and can be made into product entirety or localized mode according to the needs of production
Tool,
Composite material raw material is put into mold, the shape of needs is made, carries out solidification or drying and shaping so that finished surface is
Uniform pores shape so as to molten iron flow, and is made model inner casing in composite material and adds reinforcing rib；
Step 5：Product pours into a mould the making of model
A, sand mold, metal mold, etc. be free cavity model casting：It is suitable in cavity that the good mold of its pre-production is put in
Position, the reinforcing rib for being used in combination its included fixes.Then original technique is pressed in the product model cavity inside being full of or part
Mould cast model is made,
B, the models full mold such as lost foam casting, wax-pattern essence casting（Without cavity）Casting：Composite material model is placed in physically
As a part for cast product.Again will or later again to the materials such as its surface layer dry sand or foam powder, paraffin to surface into
It applies and coats again after row processing, to ensure surface smoothness,
A and B coat high-temperature resistant coating in two cast model surfaces, and it is aerial with 50-60 DEG C of drying to be sent into baking room so that casting
Heating dewaxing forms the sky with composite material after part model becomes evaporative pattern cast model or the hardening of wax-pattern essence casting surface coating
Chamber cast model, so that the cast model substitutes evaporative pattern；
Step 6：Casting manufactures
After carrying out above, pouring and riser systems are made by the manufacturing technique requirent of the casting.
Step 7：According to by cast steel in composition or material according to cast product in component requirements, be fused into qualified iron
Water, it is calm, skim after poured；
Step 8：Feeding
After product is carried out, by automatic mold rollover unit mould turnover, product is taken out from sandbox, and it is cleared up.It can be according to wanting
It asks and decides whether to be heat-treated according to casting process requirement.
Raw material B is at least sieved 2 times in step 1, and the granularity of the raw material B in step 3 is 0.212mm-10mm, improves casting
The degree of adhesion of part model effectively keeps the complete performance of gradual model so that and after sago cycas injection, cast model will not move,
Improve stability.
Reinforcing rib uses steel or iron wire in step 4, plane reticular or support rack-like is made, according to the size of casting by muscle
Diameter is set as 0.2-20mm, and reinforcing rib can be projected into the outer 0.5--60mm of model, and model is washed out when preventing molten iron from pouring into, is moved
Dynamic composite material model, to effectively molding sand be avoided to collapse.
It carries out 3 times coating in step 5 in total to cast model to be coated with, and first pass is coated with using brushing, rear twice of painting
It hangs and uses dip coating, and coating layer thickness is 1-2mm, is coated with using 3 times, be conducive to improve being coated with performance so that model surface
Coating surface thickness is uniform, to improve the clean property that the composite castings model falls off, avoids coating and molding sand adhesion, together
When avoid the excessive problem for causing permeability difference of coating layer thickness.
Temperature is poured into a mould at 50-100 DEG C higher than manufacturing technique requirent pouring temperature in step 8, and is poured into a mould with automatic
Casting machine is poured, and in such a way that slow-to-fast-is slow, and continuity is kept to pour into a mould, and is effectively prevented casting from cold shut occur and is lacked
It falls into.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of process that antiwear heat resisting performance composite material steel-casting can be improved, including：
Step 1：Material is produced
Dispensing A：Ores and its calcined products such as siliceous sand, bauxite, kyanite, zircon sand, chrome ore, olivine,
Coke is added in dispensing A, is produced after electric smelting and magnesia chrome spinel, magnoferrite, magnesium aluminate spinel, mound is made
The raw materials such as sand, corundum B；
Step 2：The preparation of binder
Inorganic binder A is using Ludox, waterglass（Sodium metasilicate）, brine, phosphoric acid and phosphate（Sodium tripolyphosphate, six inclined phosphorus
Sour sodium, aluminium dihydrogen phosphate etc.）, aluminous cement（CA50、CA70、CA80）One or more of,
Organic binder B is using syrup, dextrin, sodium carboxymethylcellulose, polyvinyl acetate emulsion, conjunction fat, spent pulping liquor, phenolic aldehyde
Resin（Solid and liquid）, polyacrylamide, sodium alginate, polyvinyl butyral, sesbania it is glued, without silester, synthesis
One or more of resin；
Step 3：The preparation of composite material raw material
Raw material B is added in blender, then will be added in blender with the binder of the 0.2-6% of raw material B content, is stirred
It mixes uniformly, and suitable water is added according to the bond degree of finished product, stir into uniformly；
Step 4：The making of model
Thickness and shape, the size and casting of size are used according to the wear-resistant surface of the shape of product of cast unit or cast product
Size is fabricated to mould plus the shrinking percentage of casting, and can be made into product entirety or localized mode according to the needs of production
Tool；
Composite material raw material is put into mold, the shape of needs is made, carries out solidification or drying and shaping so that finished surface is
Uniform pores shape so as to molten iron flow, and is made model inner casing in composite material and adds reinforcing rib, moved to prevent composite material
It is dynamic；
Step 5：Product pours into a mould the making of model
A, sand mold, metal mold, etc. be free cavity model casting：It is suitable in cavity that the good mold of its pre-production is put in
Position, the reinforcing rib for being used in combination its included fixes；
Then the product model cavity inside being full of or part are made mould by original technique and pour into a mould model,
B, the models full mold such as lost foam casting, wax-pattern essence casting（Without cavity）Casting：Composite material model is placed in physically
As a part for cast product,
Painting is coated again after or handling again surface the materials such as its surface layer dry sand or foam powder, paraffin later again
Material, to ensure surface smoothness,
A and B coat high-temperature resistant coating in two cast model surfaces, and it is aerial with 50-60 DEG C of drying to be sent into baking room so that casting
Heating dewaxing forms the sky with composite material after part model becomes evaporative pattern cast model or the hardening of wax-pattern essence casting surface coating
Chamber cast model, so that the cast model substitutes evaporative pattern；
Step 6：Casting manufactures
After carrying out above, pouring and riser systems are made by the manufacturing technique requirent of the casting,
Step 7：According to by cast steel in composition or material according to cast product in component requirements, be fused into qualified molten iron,
Calmness is poured after skimming；
Step 8：Feeding
After product is carried out, by automatic mold rollover unit mould turnover, product is taken out from sandbox, and it is cleared up, it can be according to wanting
It asks and decides whether to be heat-treated according to casting process requirement.
2. a kind of process that antiwear heat resisting performance composite material steel-casting can be improved according to claim 1, special
Sign is：Raw material B is at least sieved 2 times in the step 1, and the granularity of the raw material B in step 3 is 0.212mm-10mm.
3. a kind of process that antiwear heat resisting performance composite material steel-casting can be improved according to claim 1, special
Sign is：Reinforcing rib uses steel or iron wire in the step 4, plane reticular or support rack-like is made, according to the size of casting
Muscle diameter is set as 0.2-20mm, and reinforcing rib can be projected into the outer 0.5--60mm of model, and mould is washed out when preventing molten iron from pouring into
Type, mobile composite material model.
4. a kind of process that antiwear heat resisting performance composite material steel-casting can be improved according to claim 1, special
Sign is：It carries out 3 times coating in the step 5 in total to cast model to be coated with, and first pass is coated with to use and brush, latter twice
It is coated with and uses dip coating, and coating layer thickness is 1-2mm.
5. a kind of process that antiwear heat resisting performance composite material steel-casting can be improved according to claim 1, special
Sign is：Temperature is poured into a mould at 50-100 DEG C higher than manufacturing technique requirent pouring temperature in the step 8, and pours into a mould use
The slow mode of slow-to-fast-is poured into a mould into Line Continuity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477884A (en) * | 2021-07-06 | 2021-10-08 | 福建省开诚机械有限公司 | Optimization process method of WCB valve steel casting |
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