CN105583354A - Casting method for cast iron sand mold - Google Patents

Casting method for cast iron sand mold Download PDF

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Publication number
CN105583354A
CN105583354A CN201511022198.4A CN201511022198A CN105583354A CN 105583354 A CN105583354 A CN 105583354A CN 201511022198 A CN201511022198 A CN 201511022198A CN 105583354 A CN105583354 A CN 105583354A
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CN
China
Prior art keywords
sand
content
granularity
order
less
Prior art date
Application number
CN201511022198.4A
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Chinese (zh)
Inventor
陈隽颖
徐苹
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青岛博泰美联化工技术有限公司
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Priority to CN201511022198.4A priority Critical patent/CN105583354A/en
Publication of CN105583354A publication Critical patent/CN105583354A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/06Cast-iron alloys containing chromium
    • C22C37/08Cast-iron alloys containing chromium with nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/10Cast-iron alloys containing aluminium or silicon

Abstract

The invention discloses a casting method for a cast iron sand mold. Used casting sand comprises roughing sand, functional components and a binder. The roughing sand comprises fresh sand and reclaimed sand. The fresh sand is composed of, by weight, 100-110 parts of silica sand, 6-10 parts of zircon sand, 10-15 parts of forsterite sand, 5-7 parts of corundum, 3-5 parts of grog refractory and 3-5 parts of carbon sand. The functional components are combustible materials comprising carbon fibers. The binder is a mixture of phenolic resin, vegetable oil, tall oil and polyvinyl alcohol. The casting method is low in production cost. The structure stability is improved, the thermal conductivity is good, the refractoriness is high and the acid resistance and alkali resistance are good. The breathability is improved on the premise that the casting sand strength is ensured. The pore defect of castings is overcome and the finished product rate is increased.

Description

A kind of cast iron sand mould casting method

Technical field

The invention belongs to casting technology field, especially relate to a kind of cast iron sand mould casting method.

Background technology

At casting field, in broad terms, every material that is used for manufacturing casting mold (comprising core, coating etc.) is referred to as mouldingMaterial. The casting mold using in Foundry Production has sand mold, metal mold, ceramic mould, gypsum mould, graphite mould etc., wherein the most general andWhat use in a large number is sand mold, and worldwide, the foundry goods that application sand mold is produced accounts for the 60%-80% of various casting molds production casting outputs,21 century is called " green casting ", protection of the environment, realizes the fundamental state policy that sustainable development is for we, and Modeling Material is to castingEnvironmental protection, the green of factory, clean the important effect of playing of producing, in sand casting and lost foam casting are produced, will discharge greatlyMeasure discarded old sand, process and recycling if can not regenerate, must bring to natural environment the destruction of huge pollution,Therefore develop the Modeling Material of a kind of environmental protection, of low pollution for current present situation, have great significance.

Summary of the invention

Based on above technical problem, the invention discloses a kind of cast iron sand mould casting method, adopt environment-friendly materials, protect environmentWith resource.

The technical scheme that the present invention is complete comprises:

A kind of cast iron sand mould casting method, is characterized in that, its component content of described cast iron is counted with % by weight: C:2%~2.55%,Si:1.07%~1.2%,Mn0.65%~0.78%,P:≤0.02%,S:≤0.02%,Cr:0.4%~0.15%,Ni:1.8%~2.1%, Mo:1.1%~1.4%, Mg:0.02, all the other are Fe and other inevitable impurity,

Adopt electro-smelting to become molten iron the raw material that comprises mentioned component, cast iron melting temperature: 1480-1520 DEG C comes out of the stove; NodularizationProcess, inoculation, the molten iron temperature after spheroidising and inoculation is controlled at 1380-1450 DEG C, subsequently molten iron is poured intoState in the device for sand coated iron mould sand mold of mould assembling, unpack until molten steel solidification and after being cooled to 500-600 DEG C, cleaning swage, takes out foundry goods;

The molding sand of described sand mold comprises roughing sand, the first function ingredients, and the second function ingredients, described roughing sand comprises fresh sand and regenerationSand, described fresh sand and reclaimed sand mass ratio are (65-80): (35-20);

Described fresh sand comprises silica sand 100-110 part by weight, zircon sand 6-10 part, forsterite sand 10-15 part, corundumSand 5-7 part, grog refractory 3-5 part, carbon sand 3-5 part;

In described silica sand, dioxide-containing silica is 90%-95%, and aluminium oxide is less than 5%, and surplus is inevitable impurity, granularityFor 140-180 order, strict density is more than 1.75g/cm3, and average fineness is 52-55;

In zircon sand, zirconia content is greater than 70%, and silica content is less than 28%, and titanium oxide content is less than 0.3%, iron oxide contentBe less than 0.12%, alumina content is less than 0.2%, and granularity is 240-280 order;

In described olivine sand, content of magnesia is 48-55%, and silica content is less than 45%, and iron oxide content is less than 8%, grainDegree is 240-280 order,

In described emergy, alumina content is 99-99.5%, and granularity is 140-180 order;

Described grog refractory is that mass ratio is bauxite and the gangue mixture of 2:1, and wherein in bauxite, alumina content is75%, refractoriness is greater than 1850 DEG C,

Described carbon sand is that graphite or coke, granularity are 160-200 order,

Described reclaimed sand granularity is 180-240 order.

The first described function ingredients is thin wood chip and agricultural crop straw, and thin wood chip granularity is 160-200 order, agricultural crop straw fibreDimension diameter is 4-6mm;

The second described function ingredients diatomite or attapulgite one to two kind, granularity is 80-120 order, it accounts for roughing sand gross mass3-5%.

The relative prior art of the present invention, adopts the silica sand of appropriate level as roughing sand principal component, has reduced production cost, and has adoptedThe zircon sand that particle diameter is little and olivine sand, the coefficient of expansion is little, has improved structural stability, and thermal conductivity is good, and refractoriness is high, and oliveOlive stone sand has also improved the anti acid alkali performance of molding sand, and grog refractory is loose, has improved refractoriness, and is convenient to knockout processing, adoptsReclaimed sand, is beneficial to environmental protection recycling, and fine grain reclaimed sand is conducive to improve casting mold quality, adopts diatomite or recessed simultaneouslyProtruding rod soil waits porous material as molding sand material, has reduced the use amount of refractory material, makes casting mold lighting, has both been conducive to environmental protection,And adopt rational proportioning, and under the prerequisite that ensures sand bond, increase gas permeability, reduce bleb defect, increaseYield rate.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention will be further described.

A kind of cast iron sand mould casting method, is characterized in that, its component content of described cast iron is counted with % by weight: C:2%~2.55%,Si:1.07%~1.2%,Mn0.65%~0.78%,P:≤0.02%,S:≤0.02%,Cr:0.4%~0.15%,Ni:1.8%~2.1%, Mo:1.1%~1.4%, Mg:0.02, all the other are Fe and other inevitable impurity,

Adopt electro-smelting to become molten iron the raw material that comprises mentioned component, cast iron melting temperature: 1480-1520 DEG C comes out of the stove; NodularizationProcess, inoculation, the molten iron temperature after spheroidising and inoculation is controlled at 1380-1450 DEG C, subsequently molten iron is poured intoState in the device for sand coated iron mould sand mold of mould assembling, unpack until molten steel solidification and after being cooled to 500-600 DEG C, cleaning swage, takes out foundry goods;

The molding sand of described sand mold comprises roughing sand, the first function ingredients, the second function ingredients, binding agent;

Described roughing sand comprises fresh sand and reclaimed sand, and described fresh sand and reclaimed sand mass ratio are (65-80): (35-20);

Described fresh sand comprises silica sand 100-110 part by weight, zircon sand 6-10 part, forsterite sand 10-15 part, corundumSand 5-7 part, grog refractory 3-5 part, carbon sand 3-5 part;

In described silica sand, dioxide-containing silica is 90%-95%, and aluminium oxide is less than 5%, and surplus is inevitable impurity, granularityFor 140-180 order, strict density is more than 1.75g/cm3, and average fineness is 52-55;

In zircon sand, zirconia content is greater than 70%, and silica content is less than 28%, and titanium oxide content is less than 0.3%, iron oxide contentBe less than 0.12%, alumina content is less than 0.2%, and granularity is 240-280 order;

In described olivine sand, content of magnesia is 48-55%, and silica content is less than 45%, and iron oxide content is less than 8%, grainDegree is 240-280 order,

In described emergy, alumina content is 99-99.5%, and granularity is 140-180 order;

Described grog refractory is that mass ratio is bauxite and the gangue mixture of 2:1, and wherein in bauxite, alumina content is75%, refractoriness is greater than 1850 DEG C,

Described carbon sand is that graphite or coke, granularity are 160-200 order,

Described reclaimed sand granularity is 180-240 order.

The first described function ingredients is the combustible that contains carbon fiber, thin wood chip, agricultural crop straw, and thin wood chip granularity is160-200 order, crop branch fiber diameter is 4-6mm;

The second described function ingredients diatomite or attapulgite one to two kind, granularity is 80-120 order, it accounts for roughing sand gross mass3-5%,

Described binding agent is the mixture of phenolic resins, vegetable oil, tower oil, polyvinyl alcohol, and volume ratio is (60-65): (4-6):(2:-3):(10-15)。

Claims (1)

1. a cast iron sand mould casting method, is characterized in that, its component content of described cast iron is in % by weightFor: C:2%~2.55%, Si:1.07%~1.2%, Mn0.65%~0.78%, P :≤0.02%, S:≤0.02%,Cr:0.4%~0.15%,Ni:1.8%~2.1%,Mo:1.1%~1.4%,Mg:0.02,All the other are Fe and other inevitable impurity,
Adopt electro-smelting to become molten iron, cast iron melting temperature: 1480-1520 DEG C the raw material that comprises mentioned componentCome out of the stove; Spheroidising, inoculation, the molten iron temperature after spheroidising and inoculation is controlled at1380-1450 DEG C, pours into molten iron in the device for sand coated iron mould sand mold of above-mentioned mould assembling subsequently, treats molten steel solidification coldBut after 500-600 DEG C, unpack, cleaning swage, takes out foundry goods;
The molding sand of described sand mold comprises roughing sand, the first function ingredients, and the second function ingredients, described roughing sand comprisesFresh sand and reclaimed sand, described fresh sand and reclaimed sand mass ratio are (65-80): (35-20);
Described fresh sand comprises silica sand 100-110 part by weight, zircon sand 6-10 part, forsterite sand10-15 part, emergy 5-7 part, grog refractory 3-5 part, carbon sand 3-5 part;
In described silica sand, dioxide-containing silica is 90%-95%, and aluminium oxide is less than 5%, and surplus is inevitableImpurity, granularity is 140-180 order, and strict density is more than 1.75g/cm3, and average fineness is 52-55;
In zircon sand, zirconia content is greater than 70%, and silica content is less than 28%, and titanium oxide content is less than 0.3%,Iron oxide content is less than 0.12%, and alumina content is less than 0.2%, and granularity is 240-280 order;
In described olivine sand, content of magnesia is 48-55%, and silica content is less than 45%, iron oxide contentBe less than 8%, granularity is 240-280 order,
In described emergy, alumina content is 99-99.5%, and granularity is 140-180 order;
Described grog refractory is that mass ratio is bauxite and the gangue mixture of 2:1, wherein oxygen in bauxiteChanging aluminium content is 75%, and refractoriness is greater than 1850 DEG C,
Described carbon sand is that graphite or coke, granularity are 160-200 order,
Described reclaimed sand granularity is 180-240 order.
The first described function ingredients is thin wood chip and agricultural crop straw, and thin wood chip granularity is 160-200 order, agricultureCrop stalk fibre diameter is 4-6mm;
The second described function ingredients diatomite or attapulgite one to two kind, granularity is 80-120 order, itsAccount for the 3-5% of roughing sand gross mass.
CN201511022198.4A 2015-12-30 2015-12-30 Casting method for cast iron sand mold CN105583354A (en)

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Application Number Priority Date Filing Date Title
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CN201511022198.4A CN105583354A (en) 2015-12-30 2015-12-30 Casting method for cast iron sand mold
PCT/CN2016/107882 WO2017114083A1 (en) 2015-12-30 2016-11-30 Cast iron sand mould casting method

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017114074A1 (en) * 2015-12-30 2017-07-06 张建勋 Moulding sand for fire-resistant casting
WO2017114082A1 (en) * 2015-12-30 2017-07-06 张建勋 Sand mould casting method for diesel engine components
WO2017114077A1 (en) * 2015-12-30 2017-07-06 张建勋 V method casting procedure
WO2017114076A1 (en) * 2015-12-30 2017-07-06 张建勋 High breathability lost foam casting method
WO2017114080A1 (en) * 2015-12-30 2017-07-06 张建勋 Sand mould casting method for diesel engine shell
WO2017114083A1 (en) * 2015-12-30 2017-07-06 张建勋 Cast iron sand mould casting method
WO2017114081A1 (en) * 2015-12-30 2017-07-06 张建勋 Lost foam casting method for diesel engine shell
WO2017114073A1 (en) * 2015-12-30 2017-07-06 张建勋 Sand for breathable casting
WO2017114075A1 (en) * 2015-12-30 2017-07-06 张建勋 High strength casting method
WO2017114072A1 (en) * 2015-12-30 2017-07-06 张建勋 Moulding sand composition for environmentally friendly casting

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WO2017114074A1 (en) * 2015-12-30 2017-07-06 张建勋 Moulding sand for fire-resistant casting
WO2017114082A1 (en) * 2015-12-30 2017-07-06 张建勋 Sand mould casting method for diesel engine components
WO2017114077A1 (en) * 2015-12-30 2017-07-06 张建勋 V method casting procedure
WO2017114076A1 (en) * 2015-12-30 2017-07-06 张建勋 High breathability lost foam casting method
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WO2017114081A1 (en) * 2015-12-30 2017-07-06 张建勋 Lost foam casting method for diesel engine shell
WO2017114073A1 (en) * 2015-12-30 2017-07-06 张建勋 Sand for breathable casting
WO2017114075A1 (en) * 2015-12-30 2017-07-06 张建勋 High strength casting method
WO2017114072A1 (en) * 2015-12-30 2017-07-06 张建勋 Moulding sand composition for environmentally friendly casting

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Application publication date: 20160518