CN106191637A - A kind of casting method of anticorrosion wear-resisting low chrome material - Google Patents

A kind of casting method of anticorrosion wear-resisting low chrome material Download PDF

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CN106191637A
CN106191637A CN201610741416.8A CN201610741416A CN106191637A CN 106191637 A CN106191637 A CN 106191637A CN 201610741416 A CN201610741416 A CN 201610741416A CN 106191637 A CN106191637 A CN 106191637A
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casting
warming
resisting low
low chrome
wear
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吴延贵
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Bengbu Beichen Micro Machine Tool Factory
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Bengbu Beichen Micro Machine Tool Factory
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • C22C33/06Making ferrous alloys by melting using master alloys
    • 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
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60Aqueous agents
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/08Making cast-iron alloys
    • C22C33/10Making cast-iron alloys including procedures for adding magnesium
    • 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/001Ferrous alloys, e.g. steel alloys containing N
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/001Austenite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/002Bainite

Abstract

The invention discloses the casting method of a kind of anticorrosion wear-resisting low chrome material, comprise the steps: to add raw materials in smelting furnace, insulation is skimmed after being completely melt, obtains molten alloy liquid, its each element includes: C, Si, Cr, Cu, Ca, Mn, Mo, N, Ni, Mg, Ti, Zr, S, P, surplus is ferrum and inevitable impurity;Aluminium alloy pouring into surface-coated and has in the sand mold die cavity of nano paint, described nano paint is nano material and refractory aggregate carries out dispensing and makes, and obtains foundry goods base substrate;Foundry goods base substrate is after heat treatment obtained described anticorrosion wear-resisting low chrome material.The casting method of the anticorrosion wear-resisting low chrome material that the present invention proposes, cast the alloy material obtained can use in a variety of contexts, there is good corrosion-resistant and wearability, hardness up to more than 70HRC, meet actually used during requirement to wear resistant alloy material.

Description

A kind of casting method of anticorrosion wear-resisting low chrome material
Technical field
The present invention relates to casting technology field, particularly relate to the casting method of a kind of anticorrosion wear-resisting low chrome material.
Background technology
In recent years, anti-abrasive material technology has obtained the development advanced by leaps and bounds, and wherein casting high chromium alloy material is as resistance to One branch of lost material, applies the most universal in the industrial production.High-chromium alloy is the most wear-resisting is by its microstructure Structure is determined.The subject alloy composition feature of casting high chromium alloy material is Gao Ge (>=12%) and high-carbon (>=2%), Containing substantial amounts of eutectic carbide hard phase in its microstructure, these hard phases and strong, the preferable matrix of toughness is combined, obtain Obtain excellent abrasion resistance properties.
In wear-resistant field, pursuit alloy has more high wear resistance and more preferable combination property is the master that material is innovated Flow path direction.Although high-chromium alloy being capable of high-wearing feature containing high rigidity " chromium carbide " hard phase, but high-chromium alloy being deposited Weakness be just to be that the existence of a large amount of " chromium carbide " hard phase makes the overall performance of alloy material poor.And when being used for In ore dressing industry, owing to grinding machine is water mill, high-chromium alloy as high-abrasive material except chemical attack can be produced, grind in the middle of, by Higher in chrome content, internal appearance potential is poor, produces electricity, occurs electrochemical corrosion under the medium conductive condition of water, uses effect Fruit is the most undesirable.
It is not good enough, no that existing casting low chrome material has wearability, hardness and decay resistance aspect at the same time The requirement of society now can be met.Because the defect that above-mentioned alloy material exists, it is therefore desirable to should have high wearability, The toughness that hardness is become reconciled, also requires that the rotproofness of alloy wants good, and this just proposes greater degree to the casting technique of alloy Requirement.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes the casting of a kind of anticorrosion wear-resisting low chrome material Making method, being cast the alloy material obtained can use in a variety of contexts, has good corrosion-resistant and wearability, and hardness can Reach more than 70HRC, meet actually used during requirement to wear resistant alloy material.
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, comprises the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1500-1550 DEG C, add after insulation 20-45min Enter ferrochrome, red copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1560-1600 DEG C, adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after insulation 10-20min, insulation is skimmed after being completely melt, Obtaining molten alloy liquid, its each element includes by weight percentage: C:1.5-2.4%, Si:1.1-1.6%, Cr:0.7- 1.2%, Cu:0.5-0.8%, Ca:0.3-0.6%, Mn:1.2-1.7%, Mo:0.1-0.6%, N:0.02-0.05%, Ni: 0.1-0.3%, Mg:0.01-0.1%, Ti:0.1-0.3%, Zr:0.03-0.05%, S:0.01-0.04%, P≤0.03%, Surplus is ferrum and inevitable impurity;
S2, cast: the molten alloy liquid obtained by S1 pours into surface-coated after being cooled to 1350-1400 DEG C nano paint Sand mold die cavity in, described nano paint is the nano material by 1.5-1.8:10 by weight ratio and refractory aggregate carries out dispensing Make, after aluminium alloy solidifies completely, continue cooling and place die sinking after 5-10h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in heating furnace Content is less than 5%, is warming up to 850-900 DEG C in 10-15min, is incubated 30-40min, is warming up to 950-1000 in 1-5min DEG C, it is incubated 10-15min, in 5-10min, is warming up to 1050-1100 DEG C, add after taking-up in the salt bath of 260-320 DEG C and carry out Quenching for the first time, takes out after being cooled to 400-460 DEG C, adds in tempering furnace and is warming up to 600-680 DEG C, takes after insulation 20-35min Go out, add and the sodium silicate aqueous solution of 50-90 DEG C is carried out quench for the second time, take out after being cooled to 70-120 DEG C, add tempering furnace In be warming up to 200-250 DEG C, come out of the stove air cooling after insulation 6-10h, obtain described anticorrosion wear-resisting low chrome material.
Preferably, in S1, each element of described molten alloy liquid includes by weight percentage: C:1.7-2.2%, Si: 1.2-1.5%, Cr:0.8-1.1%, Cu:0.6-0.7%, Ca:0.4-0.5%, Mn:1.3-1.6%, Mo:0.2-0.5%, N: 0.03-0.04%, Ni:0.1-0.2%, Mg:0.03-0.07%, Ti:0.2-0.3%, Zr:0.03-0.04%, S:0.02- 0.03%, P≤0.03%, surplus is ferrum and inevitable impurity.
Preferably, the weight percentage of described Mn, S and N meets: Mn >=18 × S+0.1%+25 × N.
Preferably, in S2, described nano material includes by weight: chromium carbide 1-2 part, carborundum 3-5 part, boron nitride 2- 4 parts, aluminium sesquioxide 6-10 part;Described refractory aggregate includes by weight: zirconium English powder 8-10 part, bauxite powder 4-6 part.
Preferably, the technique preparing described nano paint includes: refractory aggregate is ground to particle diameter≤100nm, and addition is received Rice material mixing, adds dehydrated alcohol mixing, obtains described nano paint;Preferably, described nano paint is at sand mold die cavity The coating thickness on surface is 30-60 μm.
Preferably, in S2, described sand mold die cavity includes the core material with high thermal conductivity energy, described core material Raw material include by weight: iron ore 80-100 part, quartz deposit 20-40 part, sodium bentonite 5-20 part, flyash 5-10 Part, desulfurated plaster 2-6 part, aluminosilicate 2-5 part, zirconium English powder 6-10 part, brown iron oxide 5-10 part, graphite powder 1-3 part, trace unit Element 0.01-0.05 part, water 1-5 part;Wherein, the granularity of described iron ore is 0.05-0.5mm;The granularity of described quartz deposit is 0.01-0.05mm;One or more the combination in W, Mn, V, Cr, Ti, Ni of the described trace element.
Preferably, in S3, the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in electric furnace Content is less than 5%, is warming up to 860-880 DEG C in 12-14min, is incubated 33-47min, is warming up to 960-980 in 2-4min DEG C, it is incubated 12-14min, in 6-8min, is warming up to 1060-1080 DEG C, add after taking-up and the salt bath of 280-300 DEG C carries out the Primary quenching, takes out after being cooled to 420-440 DEG C, adds in tempering furnace and is warming up to 620-660 DEG C, takes after insulation 25-30min Go out, add and the sodium silicate aqueous solution of 60-80 DEG C is carried out quench for the second time, take out after being cooled to 80-100 DEG C, add tempering furnace In be warming up to 220-240 DEG C, come out of the stove air cooling after insulation 7-8h, obtain described anticorrosion wear-resisting low chrome material.
Preferably, in S3, described salt bath includes by weight percentage: potassium nitrate 52-58% and sodium nitrate 42-48%.
Preferably, in S3, the proportion of described sodium silicate aqueous solution is 1.05-1.25g/cm3, modulus is 2.0-3.0.
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, first, uses raw in melting Ferrum, steel scrap, ferrochrome, red copper, calcium-silicon, ferromanganese and molybdenum-iron etc. coordinate the major ingredient as low alloy material, complete the present invention couple In the requirement that alloy material density is high and impact flexibility is high, improve alloy material in use grinding efficiency, reduce chromium simultaneously Content, it is to avoid the electrochemical corrosion effect of alloy;The nitrided ferro-chromium, nickel magnesium, titanium ingot and the zirconium ingot that add cooperate, to aluminium alloy Carry out deoxidation, reduce oxide content in matrix alloy liquid;In molten alloy liquid obtained by thus, control Mn, Cr and Cu tri- The appropriate interpolation of person so that it is can carry out alloy strengthening, and control the content of S, controlling the form of graphite, appropriate N then may be used To be solid-solution in matrix, improve the quenching degree of matrix, and by the relation with contents of simultaneously defined Mn, S, N three, be effectively improved conjunction The intensity of gold copper-base alloy and hardness;Appropriate Ca adds the core of alloy material forming core, thus reaches to increase the number of graphite, carries The effect of its roundness high, the anti-wear performance for alloy material has great improvement result;Appropriate N and Ti, Ni can tie Symphysis becomes dystectic tiny nitride, plays crystallization nuclei effect, is conducive to improving the obdurability of alloy wear-resisting layer;Appropriate Mg, Zr, be possible not only to refine matrix, it is also possible to refined carbides, and make carbide be uniformly distributed, such that it is able to substantially carry The wearability of high alloy material, prevents occurring peeling and cracking in its wearing layer practical process.
Secondly, in casting process, by being coated with nano paint in cavity surface, by the ceramic nano in nano paint Nano material and the refractory aggregate of granule composition are brushed at casting mould inwall, can be increased by nanometer scale ceramics after casting complete Strong granule and refractory aggregate are embedded in surface and the subsurface of alloy material, thus form one layer of nanoscale at alloy surface high hard Matter phase, this hard phase layer is owing to being distributed the ceramic particle etc. of function admirable so that alloy material has wearability height good, resistance to The advantage such as by force warm, corrosion-resistant, considerably improves the anti-collision performance of alloy material, intensity and anti-wear performance simultaneously;Additionally, be " inlaying " nano material and refractory aggregate are resistance to improve described alloy material surface on the surface and subsurface of alloy material Mill performance, except the constituent content of aforementioned control alloy material so that it is obtain a kind of suitable nano paint alloy internal penetration Beyond organizational structure, controlling mold in the present invention, its core material used by the Ore with specified particle diameter is the most simultaneously Matrix material, sodium bentonite, as bonding agent, thus prepares a kind of core material with high thermal conductivity energy, core material Material makes the alloy molten solution rate of cooling casting in die cavity accelerate, thus obtains bigger cooling power, under it acts on, and nanometer The nano-ceramic particle comprised in coating and refractory aggregate can be uniform, rapidly to alloy material internal penetration, and with biography The alloy product of system is compared, and the grain structure on surface is refined, and hardness improves 30%, and anti-wear performance is the most significantly carried High.
Finally, in Technology for Heating Processing, by setting three sections of slow temperature-rise periods of warm area, it is ensured that alloy material interior tissue Change is reasonable, composition more homogenization;The alloy structure hot salt bath of addition after will heat up subsequently carries out quenching for the first time, alloy It is much smaller that harmful internal stress that organization internal generates and deformation are compared with medium quenchings such as cold oil, ensures that alloy is by pre-simultaneously Fixed temperature carries out salt bath austempering, increases substantially the toughness of cast segment;Hereafter in order to increase the full hardening deepness of alloy material, Quench by the alloy structure after tempering is carried out second time, obtain bainite and the retained austenite mixing group of good combination property Knitting, hardness is high and uniformity of hardness is good.
Summary, in the present invention by being controlled making it obtain excellent comprehensive performance to the component of alloy while, By alloy surface carries out nano modification process, and utilize suitable Technology for Heating Processing to regulate parent metal performance, significantly Ground improves the performance of the aspect such as wear-resistant, corrosion-resistant of alloy material, makes the present invention be more suitable for wet grinding, improves the present invention Service life, indirectly reduce use cost.
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, comprises the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1500 DEG C, add ferrochrome, purple after insulation 45min Copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1560 DEG C, insulation Adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after 20min, insulation is skimmed after being completely melt, obtains molten alloy liquid, and it is each Element includes by weight percentage: C:1.5%, Si:1.6%, Cr:0.7%, Cu:0.8%, Ca:0.3%, Mn:1.7%, Mo: 0.1%, N:0.05%, Ni:0.1%, Mg:0.1%, Ti:0.1%, Zr:0.05%, S:0.01%, P:0.03%, surplus is Ferrum and inevitable impurity;
S2, cast: the molten alloy liquid obtained by S1 pours into surface-coated after being cooled to 1350 DEG C the sand of nano paint In pattern chamber, described nano paint is 60 μm at the coating thickness of sand mold cavity surface, and described nano paint is by weight ratio Nano material and refractory aggregate by 1.5:10 carry out dispensing and make, and described nano material includes by weight: chromium carbide 2 parts, Carborundum 3 parts, boron nitride 4 parts, aluminium sesquioxide 6 parts, described refractory aggregate includes by weight: 10 parts of zirconium English powder, bauxite 4 parts of powder, after aluminium alloy solidifies completely, continues cooling and places die sinking after 10h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in heating furnace Content is less than 5%, is warming up to 900 DEG C in 10min, is incubated 30min, is warming up to 950 DEG C in 5min, is incubated 15min, Being warming up to 1100 DEG C in 5min, add and carry out in the salt bath of 260 DEG C quenching for the first time after taking-up, described salt bath is by weight percentage Including: potassium nitrate 58% and sodium nitrate 42%, take out after being cooled to 460 DEG C, add in tempering furnace and be warming up to 600 DEG C, insulation Taking out after 35min, add and carry out in the sodium silicate aqueous solution of 50 DEG C quenching for the second time, the proportion of described sodium silicate aqueous solution is 1.25g/cm3, modulus is 2.0, takes out after being cooled to 120 DEG C, adds in tempering furnace and is warming up to 200 DEG C, sky of coming out of the stove after insulation 10h Cold, obtain described anticorrosion wear-resisting low chrome material;
Wherein, described sand mold die cavity includes the core material with high thermal conductivity energy, the raw material of described core material Include by weight: iron ore 80 parts, quartz deposit 40 parts, sodium bentonite 5 parts, 10 parts of flyash, desulfurated plaster 2 parts, silicon Aluminate 5 parts, 6 parts of zirconium English powder, brown iron oxide 10 parts, graphite powder 1 part, trace element 0.05 part, 1 part of water;Wherein, described iron mine The granularity of stone is 0.5mm, and the granularity of described quartz deposit is 0.01mm, and described trace element is W and Mn.
Embodiment 2
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, comprises the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1550 DEG C, add ferrochrome, purple after insulation 20min Copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1600 DEG C, insulation Adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after 10min, insulation is skimmed after being completely melt, obtains molten alloy liquid, and it is each Element includes by weight percentage: C:2.4%, Si:1.1%, Cr:1.2%, Cu:0.5%, Ca:0.6%, Mn:1.2%, Mo: 0.6%, N:0.02%, Ni:0.3%, Mg:0.01%, Ti:0.3%, Zr:0.03%, S:0.04%, P:0.02%, surplus is Ferrum and inevitable impurity;
S2, cast: the molten alloy liquid obtained by S1 pours into surface-coated after being cooled to 1400 DEG C the sand of nano paint In pattern chamber, described nano paint is 30 μm at the coating thickness of sand mold cavity surface, and described nano paint is by weight ratio Nano material and refractory aggregate by 1.8:10 carry out dispensing and make, and described nano material includes by weight: chromium carbide 1 part, Carborundum 5 parts, boron nitride 2 parts, aluminium sesquioxide 10 parts, described refractory aggregate includes by weight: 8 parts of zirconium English powder, bauxite 6 parts of powder, after aluminium alloy solidifies completely, continues cooling and places die sinking after 5h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in heating furnace Content is less than 5%, is warming up to 850 DEG C in 15min, is incubated 40min, is warming up to 1000 DEG C in 1min, is incubated 10min, It is warming up to 1050 DEG C in 10min, adds after taking-up and the salt bath of 320 DEG C is carried out quench for the first time, described salt bath percentage by weight Ratio includes: potassium nitrate 52% and sodium nitrate 48%, takes out after being cooled to 400 DEG C, adds in tempering furnace and is warming up to 680 DEG C, insulation Taking out after 20min, add and carry out in the sodium silicate aqueous solution of 90 DEG C quenching for the second time, the proportion of described sodium silicate aqueous solution is 1.05g/cm3, modulus is 3.0, takes out after being cooled to 70 DEG C, adds in tempering furnace and is warming up to 250 DEG C, sky of coming out of the stove after insulation 6h Cold, obtain described anticorrosion wear-resisting low chrome material;
Wherein, described sand mold die cavity includes the core material with high thermal conductivity energy, the raw material of described core material Include by weight: iron ore 100 parts, quartz deposit 20 parts, sodium bentonite 20 parts, 5 parts of flyash, desulfurated plaster 6 parts, silicon Aluminate 2 parts, 10 parts of zirconium English powder, brown iron oxide 5 parts, graphite powder 3 parts, trace element 0.01 part, 5 parts of water;Wherein, described iron mine The granularity of stone is 0.05mm, and the granularity of described quartz deposit is 0.05mm, and described trace element is V and Cr.
Embodiment 3
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, comprises the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1520 DEG C, add ferrochrome, purple after insulation 30min Copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1580 DEG C, insulation Adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after 15min, insulation is skimmed after being completely melt, obtains molten alloy liquid, and it is each Element includes by weight percentage: C:1.7%, Si:1.5%, Cr:0.8%, Cu:0.7%, Ca:0.4%, Mn:1.6%, Mo: 0.2%, N:0.04%, Ni:0.1%, Mg:0.07%, Ti:0.2%, Zr:0.04%, S:0.02%, P:0.01%, surplus is Ferrum and inevitable impurity;
S2, cast: the molten alloy liquid obtained by S1 pours into surface-coated after being cooled to 1380 DEG C the sand of nano paint In pattern chamber, described nano paint is 40 μm at the coating thickness of sand mold cavity surface, and described nano paint is by weight ratio Nano material and refractory aggregate by 1.6:10 carry out dispensing and make, and described nano material includes by weight: chromium carbide 1.5 Part, carborundum 4 parts, boron nitride 3 parts, aluminium sesquioxide 8 parts, described refractory aggregate includes by weight: 9 parts of zirconium English powder, aluminum vitriol 5 parts of powder of soil, after aluminium alloy solidifies completely, continues cooling and places die sinking after 7h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in electric furnace contain Amount, less than 5%, is warming up to 880 DEG C in 12min, is incubated 33min, is warming up to 960 DEG C in 4min, is incubated 14min, at 6min Inside being warming up to 1080 DEG C, add and carry out in the salt bath of 280 DEG C quenching for the first time after taking-up, described salt bath wraps by weight percentage Include: potassium nitrate 58% and sodium nitrate 42%, take out after being cooled to 440 DEG C, add in tempering furnace and be warming up to 620 DEG C, be incubated 30min Rear taking-up, adds and carries out in the sodium silicate aqueous solution of 60 DEG C quenching for the second time, and the proportion of described sodium silicate aqueous solution is 1.15g/ cm3, modulus is 2.0, takes out after being cooled to 100 DEG C, adds in tempering furnace and is warming up to 220 DEG C, air cooling of coming out of the stove after insulation 8h, obtains Described anticorrosion wear-resisting low chrome material;
Wherein, described sand mold die cavity includes the core material with high thermal conductivity energy, the raw material of described core material Include by weight: iron ore 90 parts, quartz deposit 30 parts, sodium bentonite 12 parts, 7 parts of flyash, desulfurated plaster 4 parts, silicon Aluminate 3 parts, 8 parts of zirconium English powder, brown iron oxide 7 parts, graphite powder 2 parts, trace element 0.03 part, 3 parts of water;Wherein, described iron mine The granularity of stone is 0.1mm, and the granularity of described quartz deposit is 0.03mm, and described trace element is Ti and Ni.
Embodiment 4
The casting method of a kind of anticorrosion wear-resisting low chrome material that the present invention proposes, comprises the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1530 DEG C, add ferrochrome, purple after insulation 35min Copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1570 DEG C, insulation Adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after 16min, insulation is skimmed after being completely melt, obtains molten alloy liquid, and it is each Element includes by weight percentage: C:2.2%, Si:1.2%, Cr:1.1%, Cu:0.6%, Ca:0.5%, Mn:1.3%, Mo: 0.5%, N:0.03%, Ni:0.2%, Mg:0.03%, Ti:0.3%, Zr:0.03%, S:0.03%, P:0.03%, surplus is Ferrum and inevitable impurity;
S2, cast: the molten alloy liquid obtained by S1 pours into surface-coated after being cooled to 1370 DEG C the sand of nano paint In pattern chamber, described nano paint is 50 μm at the coating thickness of sand mold cavity surface, and described nano paint is by weight ratio Nano material and refractory aggregate by 1.7:10 carry out dispensing and make, and described nano material includes by weight: chromium carbide 1.6 Part, carborundum 4.5 parts, boron nitride 3.5 parts, aluminium sesquioxide 9 parts, described refractory aggregate includes by weight: zirconium English powder 8.5 Part, bauxite powder 5.5 parts, after aluminium alloy solidifies completely, continue cooling and place die sinking after 8h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen in electric furnace contain Amount, less than 5%, is warming up to 860 DEG C in 14min, is incubated 47min, is warming up to 980 DEG C in 2min, is incubated 12min, at 8min Inside being warming up to 1060 DEG C, add and carry out in the salt bath of 300 DEG C quenching for the first time after taking-up, described salt bath wraps by weight percentage Include: potassium nitrate 55% and sodium nitrate 45%, take out after being cooled to 430 DEG C, add in tempering furnace and be warming up to 640 DEG C, be incubated 28min Rear taking-up, adds and carries out in the sodium silicate aqueous solution of 70 DEG C quenching for the second time, and the proportion of described sodium silicate aqueous solution is 1.2g/ cm3, modulus is 3.0, takes out after being cooled to 80 DEG C, adds in tempering furnace and is warming up to 240 DEG C, air cooling of coming out of the stove after insulation 7h, obtains Described anticorrosion wear-resisting low chrome material;
Wherein, described sand mold die cavity includes the core material with high thermal conductivity energy, the raw material of described core material Include by weight: iron ore 85 parts, quartz deposit 35 parts, sodium bentonite 15 parts, 8 parts of flyash, desulfurated plaster 3 parts, silicon Aluminate 4 parts, 7 parts of zirconium English powder, brown iron oxide 8 parts, graphite powder 2 parts, trace element 0.04 part, 2 parts of water;Wherein, described iron mine The granularity of stone is 0.2mm, and the granularity of described quartz deposit is 0.02mm, and described trace element is W, Mn, V and Cr.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.

Claims (9)

1. the casting method of an anticorrosion wear-resisting low chrome material, it is characterised in that comprise the steps:
S1, melting: the pig iron, steel scrap are added in smelting furnace, and be heated to 1500-1550 DEG C, add chromium after insulation 20-45min Ferrum, red copper, calcium-silicon, ferromanganese and molybdenum-iron, be incubated and add vanadium iron, ferrotianium and ferro-boron after being completely melt, be warming up to 1560- 1600 DEG C, adding nitrided ferro-chromium, nickel magnesium, titanium ingot and zirconium ingot after insulation 10-20min, insulation is skimmed after being completely melt, is melted Melting aluminium alloy, its each element includes by weight percentage: C:1.5-2.4%, Si:1.1-1.6%, Cr:0.7-1.2%, Cu: 0.5-0.8%, Ca:0.3-0.6%, Mn:1.2-1.7%, Mo:0.1-0.6%, N:0.02-0.05%, Ni:0.1-0.3%, Mg:0.01-0.1%, Ti:0.1-0.3%, Zr:0.03-0.05%, S:0.01-0.04%, P≤0.03%, surplus be ferrum and Inevitably impurity;
S2, cast: the molten alloy liquid obtained by S1 is cooled to after 1350-1400 DEG C pour into surface-coated the sand of nano paint In pattern chamber, described nano paint is the nano material by 1.5-1.8:10 by weight ratio and refractory aggregate carries out dispensing system Become, after aluminium alloy solidifies completely, continue cooling and place die sinking after 5-10h, obtain foundry goods base substrate;
S3, heat treatment: the foundry goods base substrate obtained by S2 adds in heating furnace, is passed through argon to heating furnace and makes oxygen content in heating furnace Less than 5%, in 10-15min, it is warming up to 850-900 DEG C, is incubated 30-40min, in 1-5min, is warming up to 950-1000 DEG C, Insulation 10-15min, is warming up to 1050-1100 DEG C in 5-10min, adds in the salt bath of 260-320 DEG C and carry out first after taking-up Secondary quenching, takes out after being cooled to 400-460 DEG C, adds in tempering furnace and is warming up to 600-680 DEG C, takes out after insulation 20-35min, Add and the sodium silicate aqueous solution of 50-90 DEG C is carried out quench for the second time, take out after being cooled to 70-120 DEG C, add in tempering furnace and rise Warm to 200-250 DEG C, air cooling of coming out of the stove after insulation 6-10h, obtain described anticorrosion wear-resisting low chrome material.
The casting method of anticorrosion wear-resisting low chrome material the most according to claim 1, it is characterised in that in S1, described Each element of molten alloy liquid includes by weight percentage: C:1.7-2.2%, Si:1.2-1.5%, Cr:0.8-1.1%, Cu: 0.6-0.7%, Ca:0.4-0.5%, Mn:1.3-1.6%, Mo:0.2-0.5%, N:0.03-0.04%, Ni:0.1-0.2%, Mg:0.03-0.07%, Ti:0.2-0.3%, Zr:0.03-0.04%, S:0.02-0.03%, P≤0.03%, surplus be ferrum and Inevitably impurity.
The casting method of anticorrosion wear-resisting low chrome material the most according to claim 2, it is characterised in that described Mn, S and The weight percentage of N meets: Mn >=18 × S+0.1%+25 × N.
4. according to the casting method of anticorrosion wear-resisting low chrome material described in any one of claim 1-3, it is characterised in that S2 In, described nano material includes by weight: chromium carbide 1-2 part, carborundum 3-5 part, boron nitride 2-4 part, aluminium sesquioxide 6- 10 parts;Described refractory aggregate includes by weight: zirconium English powder 8-10 part, bauxite powder 4-6 part.
The casting method of anticorrosion wear-resisting low chrome material the most according to claim 4, it is characterised in that receive described in preparation The technique of rice coating includes: refractory aggregate is ground to particle diameter≤100nm, adds nano material mixing, adds dehydrated alcohol Mixing, obtains described nano paint;Preferably, described nano paint is 30-60 μm at the coating thickness of sand mold cavity surface.
6. according to the casting method of anticorrosion wear-resisting low chrome material described in any one of claim 1-5, it is characterised in that S2 In, described sand mold die cavity includes the core material with high thermal conductivity energy, and the raw material of described core material wraps by weight Include: iron ore 80-100 part, quartz deposit 20-40 part, sodium bentonite 5-20 part, flyash 5-10 part, desulfurated plaster 2-6 Part, aluminosilicate 2-5 part, zirconium English powder 6-10 part, brown iron oxide 5-10 part, graphite powder 1-3 part, trace element 0.01-0.05 part, Water 1-5 part;Wherein, the granularity of described iron ore is 0.05-0.5mm;The granularity of described quartz deposit is 0.01-0.05mm;Institute State the trace element one or more combination in W, Mn, V, Cr, Ti, Ni.
The casting method of anticorrosion wear-resisting low chrome material the most according to claim 1, it is characterised in that in S3, by S2 The foundry goods base substrate obtained adds in heating furnace, is passed through argon to heating furnace and makes oxygen content in electric furnace be less than 5%, in 12-14min It is warming up to 860-880 DEG C, is incubated 33-47min, in 2-4min, is warming up to 960-980 DEG C, be incubated 12-14min, at 6-8min Inside it is warming up to 1060-1080 DEG C, adds after taking-up and the salt bath of 280-300 DEG C is carried out quench for the first time, be cooled to 420-440 DEG C Rear taking-up, adds in tempering furnace and is warming up to 620-660 DEG C, takes out after insulation 25-30min, and the sodium silicate adding 60-80 DEG C is water-soluble Liquid carries out second time quench, take out after being cooled to 80-100 DEG C, add in tempering furnace and be warming up to 220-240 DEG C, be incubated 7-8h After come out of the stove air cooling, obtain described anticorrosion wear-resisting low chrome material.
8. according to the casting method of anticorrosion wear-resisting low chrome material described in any one of claim 1-7, it is characterised in that S3 In, described salt bath includes by weight percentage: potassium nitrate 52-58% and sodium nitrate 42-48%.
9. the casting method of the wear-resisting low chrome of anticorrosion as described in any one of claim 1-8 material, it is characterised in that S3 In, the proportion of described sodium silicate aqueous solution is 1.05-1.25g/cm3, modulus is 2.0-3.0.
CN201610741416.8A 2016-08-26 2016-08-26 A kind of casting method of anticorrosion wear-resisting low chrome material Pending CN106191637A (en)

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CN106555131A (en) * 2016-12-02 2017-04-05 机械科学研究总院青岛分院 A kind of Super High Carbon profile shaft holds Heat-Treatment of Steel method
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CN108294513A (en) * 2018-01-26 2018-07-20 夏勇 A kind of VR Ergonomic chairs
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