CN106381449A - Preparation method of low-alloy air purifier filter screen - Google Patents

Preparation method of low-alloy air purifier filter screen Download PDF

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Publication number
CN106381449A
CN106381449A CN201610846381.4A CN201610846381A CN106381449A CN 106381449 A CN106381449 A CN 106381449A CN 201610846381 A CN201610846381 A CN 201610846381A CN 106381449 A CN106381449 A CN 106381449A
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CN
China
Prior art keywords
filter screen
low
alloy
preparation
cast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610846381.4A
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Chinese (zh)
Inventor
谢爱兵
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Anhui Lei Feng Refrigeration Engineering Co Ltd
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Anhui Lei Feng Refrigeration Engineering Co Ltd
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Priority to CN201610846381.4A priority Critical patent/CN106381449A/en
Publication of CN106381449A publication Critical patent/CN106381449A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1291—Other parameters
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a preparation method of a low-alloy air purifier filter screen. The preparation method of the low-alloy air purifier filter screen comprises the following process steps: (1) preparing molten steel for casing a low alloy, successively adding raw materials comprising waste steel plates, ferrochrome, ferrotungsten, ferroniobium and rare earth silicon into a vacuum induction electric smelting furnace in sequence, carrying out deoxidation alloying of the molten steel via an aluminum wire after the molten steel is melted down, and then casting via an investment casting method; (2) preparing a cast steel billet from the following alloy chemical elements in percentage by mass: 0.855% of C, 3% of W, 2% of Mo, 2.0% of V, 4.0% of Cr, 0.05% of Nb, 0.1% of Re which is rare earth silicon and the balance of Fe; and (3) annealing a cast filter screen for 1-2 hours at the temperature of 700-750 DEG C, then quenching the cast filter screen at the temperature of 1250-1275 DEG C, and tempering the cast filter screen for 2-3 times at the temperature of 400-525 DEG C in a manner of tempering the cast filter screen for 1.5 hours for each time. Through the preparation method of the low-alloy air purifier filter screen, the content of high-cost W and Mo in high-speed steel is reduced; meanwhile, a trace amount of elements such as N, Nb and RE and the like are added; the property of high red hardness is retained; the cost is greatly reduced; the abrasion resistance of the purifier filter screen is improved.

Description

A kind of low-alloy air purifier filter screen preparation method
Technical field
The present invention relates to air purifier field, particularly belong to a kind of low-alloy air purifier filter screen preparation method.
Background technology
At present, with social development, air quality also becomes worse and worse.In order to improve the quality of living, in daily life In, people would generally select to purify the air of surrounding using air purifier.
General air purifier is that the power line of air purifier is accessed domestic power supply interface, or accesses vehicle-mounted The power interface of smoking apparatus, with the blower fan in electrical energy drive air purifier, by air suction machine, then by filtering or killing The processes such as bacterium realize the purification to air, are finally discharged by exhaust outlet again.
But due to due to air purifier filter screen material and manufacture craft, long-time use occurs the phenomenon got rusty.
Content of the invention
It is an object of the invention to provide a kind of low-alloy air purifier filter screen preparation method, reduce price in high-speed steel Expensive W, Mo content, adds the elements such as micro N, Nb and RE simultaneously, obtains the characteristic both having kept higher red hardness, and larger Amplitude ground reduces cost, improves clarifier filter screen wearability.
Technical scheme is as follows：
A kind of low-alloy air purifier filter screen preparation method, includes following processing step：
1）, casting low-alloy molten steel preparation, sequentially add in vacuum induction furnace melting in order raw material waste steel plate, ferrochrome, Ferrotungsten, ferro-niobium, rare earth silicon, carry out deoxidation alloying with aluminium wire to molten steel after molten steel is melting down, then are cast with investment casting；
2）, the mass percent of each alloy element is in as cast condition steel billet after casting：C0.823-0.887%、W2.5-3.5%、 Mo1.5-2.5%, V2.0%, Cr4.0%, Nb0.05%, Re0.1%, balance of Fe, Re are rare earth silicon；
3）, as cast condition filter screen through 700-750 DEG C annealing 1-2 hour after, quenched, 1250 DEG C -1275 DEG C of hardening heat, tempering temperature 400 DEG C -525 DEG C of degree, tempering 1.5 hours every time, 2-3 time；
4）, blackening process, temperature be 240～240 DEG C under conditions of, filter screen is placed in sodium nitrite solution and processes to surface In grey black or all black, then filter screen is taken out from sodium nitrite solution, and spontaneous curing 45～50min, more abundant with water Clean, air-dry.
In described as cast condition steel billet, the mass percent of each alloy element is：C0.855%、W3%、Mo2%、V2.0%、 Cr4.0%, Nb0.05%, Re0.1%, balance of Fe, Re are rare earth silicon.
Compared with prior art, the Advantageous Effects of the present invention are as follows：
1）Reduce W, Mo element in high-speed steel, add the low-alloy high-speed steel of micro Nb, N, RE element simultaneously The as-cast structure of W3Mo2Cr4V2NbNRE is by continuous net-shaped eutectic ledeburite, dark structure, martensite and retained austenite group Become.Annealed, quenching, tempering after be organized as discontinuously netted eutectic carbide, tempered martensite, proeutectoid carbide and remnants Austenite.
2）The Technology for Heating Processing of W3Mo2Cr4V2NbNRE is+560 DEG C of three tempering of 1250 DEG C of quenchings, and hardness reaches HRC64. This steel belt roof bolt stability is also fine, and the hardness after 560 DEG C of insulation 20h is still HRC62.
3）Although there are eutectic carbide in the tempered structure of quenching of casting low-alloy high speed steel W 3Mo2Cr4V2NbNRE, As long as but the clarifier filter screen that compressive stress state is born in manufacture is feasible.Wearability is far above existing clarifier filter screen, connects It is bordering on the wearability of common high-speed steel.
4）The cost of W3Mo2Cr4V2NbNRE is lower than universal high speed steel W18Cr4V, is a kind of energy-saving wear-resisting material Material.
Brief description
Fig. 1 is as-cast metallographic structure's schematic diagram of test steel.
Specific embodiment
A kind of low-alloy air purifier filter screen preparation method, includes following processing step：
1）, casting low-alloy molten steel preparation, sequentially add in vacuum induction furnace melting in order raw material waste steel plate, ferrochrome, Ferrotungsten, ferro-niobium, rare earth silicon, carry out deoxidation alloying with aluminium wire to molten steel after molten steel is melting down, then are cast with investment casting；
2）, the mass percent of each alloy element is in as cast condition steel billet after casting：C0.855%、W3%、Mo2%、V2.0%、 Cr4.0%, Nb0.05%, Re0.1%, balance of Fe, Re are rare earth silicon；
3）, as cast condition filter screen through 700-750 DEG C annealing 1-2 hour after, quenched, 1250 DEG C -1275 DEG C of hardening heat, tempering temperature 400 DEG C -525 DEG C of degree, tempering 1.5 hours every time, 2-3 time；
4）, blackening process, temperature be 240～240 DEG C under conditions of, filter screen is placed in sodium nitrite solution and processes to surface In grey black or all black, then filter screen is taken out from sodium nitrite solution, and spontaneous curing 45～50min, more abundant with water Clean, air-dry.
Carry out red hardness test by the steel after Q-tempering is carried out by the as cast condition steel billet that the present embodiment is obtained, at 550 DEG C Insulation 4 hours totally five times 20 hours, survey its hardness with 69-1 type Michael Burawoy optics hardness tester every time after being cooled to room temperature every time；Mill Grain wear test, sample is processed into 10 mm × 10 mm × 20mm, carries out no-load abrasion in self-control abrasive wear machine, during abrasion Between be 30min, frosted is the quartz sand of 20 mesh, and the FA2004N type optical electrobalance being 0.1mg with precision after mill claims it weightless；Sliding Dynamic wear test, sample is processed into 6.5mm × 6.5 mm × 30mm, carries out, load on model MM 200 skimming wear machine For 15kg, sample claims it weightless with optical electrobalance after 20min abrasion.
The wearability of test steel：
Apparently higher than cast steel with high chromium close to common high speed steel W18Cr4V, this is due in test steel to the wearability of test steel The compound carbonitride of W, Mo, V, Nb in not molten eutectic carbide and matrix（Once with secondary precipitation）Tribute to wearability Offer.

Claims (2)

1. a kind of low-alloy air purifier filter screen preparation method is it is characterised in that include following processing step：
1）, casting low-alloy molten steel preparation, sequentially add in vacuum induction furnace melting in order raw material waste steel plate, ferrochrome, Ferrotungsten, ferro-niobium, rare earth silicon, carry out deoxidation alloying with aluminium wire to molten steel after molten steel is melting down, then are cast with investment casting；
2）, the mass percent of each alloy element is in as cast condition steel billet after casting：C0.823-0.887%、W2.5-3.5%、 Mo1.5-2.5%, V2.0%, Cr4.0%, Nb0.05%, Re0.1%, balance of Fe, Re are rare earth silicon；
3）, as cast condition filter screen through 700-750 DEG C annealing 1-2 hour after, quenched, 1250 DEG C -1275 DEG C of hardening heat, tempering temperature 400 DEG C -525 DEG C of degree, tempering 1.5 hours every time, 2-3 time；
4）, blackening process, temperature be 240～240 DEG C under conditions of, filter screen is placed in sodium nitrite solution and processes to surface In grey black or all black, then filter screen is taken out from sodium nitrite solution, and spontaneous curing 45～50min, more abundant with water Clean, air-dry.
2. low-alloy air purifier filter screen preparation method according to claim 1 is it is characterised in that described as cast condition steel billet In the mass percent of each alloy element be：C0.855%, W3%, Mo2%, V2.0%, Cr4.0%, Nb0.05%, Re0.1%, Balance of Fe, Re are rare earth silicon.
CN201610846381.4A 2016-09-23 2016-09-23 Preparation method of low-alloy air purifier filter screen Pending CN106381449A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114473371A (en) * 2021-12-22 2022-05-13 马鞍山市申力特重工机械股份有限公司 Preparation method of blade material on shearing machine and shearing test equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101748334A (en) * 2010-01-08 2010-06-23 北京工业大学 High hardness cast boron-containing low alloy wear-resistant high-speed steel and preparation method thereof
CN103084797A (en) * 2012-12-04 2013-05-08 安徽六方重联机械股份有限公司 Method for forging bolt for caterpillar track of excavator
CN103014516B (en) * 2012-12-21 2015-04-22 江苏大学 Borated low-alloy high-speed steel roller and manufacturing method thereof
CN105401078A (en) * 2015-11-03 2016-03-16 合肥海源机械有限公司 Method for producing automobile engine rocker shaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101748334A (en) * 2010-01-08 2010-06-23 北京工业大学 High hardness cast boron-containing low alloy wear-resistant high-speed steel and preparation method thereof
CN103084797A (en) * 2012-12-04 2013-05-08 安徽六方重联机械股份有限公司 Method for forging bolt for caterpillar track of excavator
CN103014516B (en) * 2012-12-21 2015-04-22 江苏大学 Borated low-alloy high-speed steel roller and manufacturing method thereof
CN105401078A (en) * 2015-11-03 2016-03-16 合肥海源机械有限公司 Method for producing automobile engine rocker shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114473371A (en) * 2021-12-22 2022-05-13 马鞍山市申力特重工机械股份有限公司 Preparation method of blade material on shearing machine and shearing test equipment

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Application publication date: 20170208