CN105970080A - Method for preparing automobile part with convenient processability - Google Patents
Method for preparing automobile part with convenient processability Download PDFInfo
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- CN105970080A CN105970080A CN201610334565.2A CN201610334565A CN105970080A CN 105970080 A CN105970080 A CN 105970080A CN 201610334565 A CN201610334565 A CN 201610334565A CN 105970080 A CN105970080 A CN 105970080A
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- powder
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- niobium carbide
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- 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for preparing an automobile part with convenient processability. The automobile part is prepared from, by weight percent, 0.3%-0.8% of carbon, 2.1%-2.6% of silicon, 0.3%-0.5% of calcium, 1.3%-1.5% of manganese, 0.6%-0.8% of titanium, 0.02%-0.04% of yttrium, 0.003%-0.05% of aluminum, 0.01%-0.03% of bismuth, not larger than 0.015% of sulfur, not larger than 0.015% of phosphorus and the balance iron and inevitable impurities. The excellent characters that steel is simple in casting process, not prone to deforming and high in thermal conductivity are guaranteed, the cost of materials in the existing automobile manufacture industry is effectively reduced, high economic benefits are achieved, and the method is worthy of popularization.
Description
Technical field
The present invention relates to technical field of automobile parts, particularly relate to a kind of processing characteristics convenient auto parts and components preparation method.
Background technology
Ferrous materials because of high intensity and good toughness in mechanical engineering manufacturing industry in occupation of critical role, in recent years, mechanical engineering structure develops to hugeization, high parameter direction day by day, the performance of ferrous materials is proposed the highest requirement, outer addition particle strengthening ferrous materials has all many advantages, but often to reduce plasticity and toughness as cost on the premise of increasing intensity, hardness.Qin Sen selects NbC as hardening constituent granule in " nanometer NbC/Fe (Fe3C) the composite powder technology of preparing of additional particle strengthening iron and application " literary composition, melting with casting process are added in mild steel and rich chromium cast iron solution respectively, to reach iron and steel structure refinement and the purpose of mechanical property strengthening.Niobium carbide has the performances such as high-melting-point, high rigidity, high elastic modulus, high abrasion, Thermodynamically stable, so these features become hardening constituent ideal in ferrous materials and are widely used.But how to realize particles of niobium carbide to be uniformly distributed in metallic matrix and be the primary key issue solved with the good combination of basal body interface.Author proposes composite powder and strengthens particles of niobium carbide method of dispersibility in molten steel, he adds aluminium powder in niobium-graphite nodule mill body system, achieve the displaced type solid solution in Nb lattice of the Al atom, (Nb-Al) C solid solution heating that ball milling is formed, obtain the niobium carbide carbide of Al doping, the real density of particles of niobium carbide is reduced to the density value close to iron and steel liquid.Additionally propose enhancing particles of niobium carbide problem of dispersibility in iron and steel liquid, realize particles of niobium carbide in-situ preparation in iron powder matrix by non-homogeneous for niobium carbide solid-solution powder adds Fe powder through heating in vacuum, this enhance niobium carbide dispersibility in iron and steel liquid.Although he providing a kind of close to the liquid-tight angle value of iron and steel with a kind of two kinds of niobium carbide composite powders of good dispersion in iron and steel liquid, but dispersibility and density value problem can not have been resolved in steelmaking process simultaneously, limit steel industry to develop on a large scale, and aluminium powder is susceptible to oxidation, and when aluminum niobium carbide is mixed in preparation, quality stability is the highest..
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of processing characteristics convenient auto parts and components preparation method.
The present invention is achieved by the following technical solutions:
A kind of processing characteristics convenient auto parts and components preparation method, prepares in accordance with the following steps:
A, melting: low-sulfur phosphorus cleaning steel scrap is joined and after being melted into molten steel in high-frequency induction smelting furnace, adds carburant, treat that the temperature in stove rises to 1500-1560 DEG C, add the pig iron, red copper alloy, calcium-silicon and ferromanganese, titanium, yttrium and bismuth is added after insulation 20-45min, add modified niobium carbide until completely melted, liter high-temperature is to 1630-1660 DEG C, and constant temperature is kept stirring for 5-10min and obtains matrix alloy liquid；
B, detection: the constituent content of detection matrix alloy liquid, adding material makes each element be by weight percentage: carbon: 0.3-0.8%, silicon: 2.1-2.6%, calcium: 0.3-0.5%, manganese: 1.3-1.5%, titanium: 0.6-0.8%, yttrium: 0.02-0.04%, aluminum: 0.003-0.05%, bismuth: 0.01-0.03%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
C, cast: be transferred in refining furnace by matrix alloy liquid, add composite refiner and carry out deoxidation, desulfurization, deslagging process, and double deoxidizer and molten steel amount ratio are 2-3 kg/tonne, and vacuum outgas is cast in fire-resistant casting mold when temperature is reduced to 1550 DEG C.
nullDescribed a kind of processing characteristics convenient auto parts and components preparation method，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6-6.5h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12-15min at 550-600 DEG C，After insulation 14-16min, natural cooling is standby，Aluminium powder is poured in fluid bed，It is passed through argon and gets rid of gas，It is heated to fluid bed when 280-320 DEG C injecting in bubbler carbonyl iron，Rise high-temperature to gasify to 100 DEG C of carbonyl irons，Sustained response a period of time is until carbonyl iron not re-evaporation in bubbler，Stop heating，Continue to be passed through argon until fluidized-bed temperature is cooled to room temperature and obtains the composite granule of ferrum cladding aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6-7h，Cool down after heating in vacuum 1-2min at 550-600 DEG C after end.
Described a kind of processing characteristics convenient auto parts and components preparation method, in c, described composite refiner is made up of following raw materials according: polyvinylpyrrolidone 0.5-1, sodium bentonite 0.6-1, calcium carbonate 2.5-3, nickel oxide 0.4-0.5, carbide 2-2.5, titanium dioxide 1.2-1.7；Polyvinylpyrrolidone and sodium bentonite are mixed and adds appropriate water stirring and dissolving, calcium carbonate, nickel oxide, carbide, titanium dioxide mixing and ball milling are crossed 200 mesh sieves and obtained mixed-powder, be added in above-mentioned solution heat while stirring formation granule again by mixed-powder, it is added into again in sintering furnace with 50 DEG C/min ramp to 500 DEG C, sprays into chilling in water after sintering 1 hour and make composite refiner.
Described a kind of processing characteristics convenient auto parts and components preparation method, in described modified niobium carbide, the quality of aluminum is 3:1-2 with the volume ratio of carbonyl iron, and the ferrum aluminum composite granule of addition and the weight ratio of niobium carbide are 1:36-38.
nullThe invention have the advantage that the present invention uses steel scrap as main cast raw material，Shortened process，Reduce energy loss，Reduce atmospheric pollution，And by rational metallic element proportioning，Obtain the alloy steel material that steady quality properties of product are high，Utilize ferrum cladding aluminium powder prepared by fluidized bed process，It is effectively prevented aluminium powder to aoxidize，And improve the dispersion problem of aluminium powder，Modified aluminium powder is mixed in particles of niobium carbide by recycling mechanical alloying，Prepare close to molten steel density value，And in molten steel dispersibility、The particles of niobium carbide that wettability is good，Improve the intensity of steel、Hardness、Wear-resistant、Shock resistance、The performance such as corrosion-resistant，The composite refiner added utilizes agglomeration process to make the powder of almost spherical，Improve the contact area with molten steel、Mobility，Its fast reaction in molten steel is made to reach the purpose of crystal grain thinning，And make steel have higher intensity、Good toughness and solderability；The present invention ensureing that steel casting technique is simple, be unlikely to deform, outside good characteristic that heat conductivity is strong, effectively reduce the cost of present automobile manufacture industry material, there is the strongest economic benefit, be worthy to be popularized.
Detailed description of the invention
A kind of processing characteristics convenient auto parts and components preparation method, prepares in accordance with the following steps:
A, melting: low-sulfur phosphorus cleaning steel scrap is joined and after being melted into molten steel in high-frequency induction smelting furnace, adds carburant, treat that the temperature in stove rises to 1500 DEG C, add the pig iron, red copper alloy, calcium-silicon and ferromanganese, titanium, yttrium and bismuth is added after insulation 20min, add modified niobium carbide until completely melted, liter high-temperature is to 1630 DEG C, and constant temperature is kept stirring for 5min and obtains matrix alloy liquid；
B, detection: the constituent content of detection matrix alloy liquid, adding material makes each element be by weight percentage: carbon: 0.3%, silicon: 2.1%, calcium: 0.3%, manganese: 1.3%, titanium: 0.6%, yttrium: 0.02%, aluminum: 0.003%, bismuth: 0.01%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
C, cast: be transferred in refining furnace by matrix alloy liquid, add composite refiner and carry out deoxidation, desulfurization, deslagging process, and double deoxidizer and molten steel amount ratio are 2 kgs/tonne, and vacuum outgas is cast in fire-resistant casting mold when temperature is reduced to 1550 DEG C.
nullDescribed a kind of processing characteristics convenient auto parts and components preparation method，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12min at 550 DEG C，After insulation 14min, natural cooling is standby，Aluminium powder is poured in fluid bed，It is passed through argon and gets rid of gas，It is heated to fluid bed when 280 DEG C injecting in bubbler carbonyl iron，Rise high-temperature to gasify to 100 DEG C of carbonyl irons，Sustained response a period of time is until carbonyl iron not re-evaporation in bubbler，Stop heating，Continue to be passed through argon until fluidized-bed temperature is cooled to room temperature and obtains the composite granule of ferrum cladding aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6h，Cool down after heating in vacuum 1min at 550 DEG C after end.
Described a kind of processing characteristics convenient auto parts and components preparation method, in c, described composite refiner is made up of following raw materials according: polyvinylpyrrolidone 0.5, sodium bentonite 0.6, calcium carbonate 2.5, nickel oxide 0.4, carbide 2, titanium dioxide 1.2；Polyvinylpyrrolidone and sodium bentonite are mixed and adds appropriate water stirring and dissolving, calcium carbonate, nickel oxide, carbide, titanium dioxide mixing and ball milling are crossed 200 mesh sieves and obtained mixed-powder, be added in above-mentioned solution heat while stirring formation granule again by mixed-powder, it is added into again in sintering furnace with 50 DEG C/min ramp to 500 DEG C, sprays into chilling in water after sintering 1 hour and make composite refiner.
Described a kind of processing characteristics convenient auto parts and components preparation method, in described modified niobium carbide, the quality of aluminum is 3:1 with the volume ratio of carbonyl iron, and the ferrum aluminum composite granule of addition and the weight ratio of niobium carbide are 1:36.
The steel preparing embodiment carry out performance test:
Hardness: 87HRB；Yield strength: 332.3MPa；Yield point elongation rate: 3.8%；Tensile strength: 417MPa；Have no progeny percentage of total elongation: 25.6%；Impact strength: 49J.
Claims (4)
1. a processing characteristics convenient auto parts and components preparation method, it is characterised in that prepare in accordance with the following steps:
A, melting: low-sulfur phosphorus cleaning steel scrap is joined and after being melted into molten steel in high-frequency induction smelting furnace, adds carburant, treat that the temperature in stove rises to 1500-1560 DEG C, add the pig iron, red copper alloy, calcium-silicon and ferromanganese, titanium, yttrium and bismuth is added after insulation 20-45min, add modified niobium carbide until completely melted, liter high-temperature is to 1630-1660 DEG C, and constant temperature is kept stirring for 5-10min and obtains matrix alloy liquid；
B, detection: the constituent content of detection matrix alloy liquid, adding material makes each element be by weight percentage: carbon: 0.3-0.8%, silicon: 2.1-2.6%, calcium: 0.3-0.5%, manganese: 1.3-1.5%, titanium: 0.6-0.8%, yttrium: 0.02-0.04%, aluminum: 0.003-0.05%, bismuth: 0.01-0.03%, sulfur≤0.015%, phosphorus≤0.015%, surplus is ferrum and inevitable impurity；
C, cast: be transferred in refining furnace by matrix alloy liquid, add composite refiner and carry out deoxidation, desulfurization, deslagging process, and double deoxidizer and molten steel amount ratio are 2-3 kg/tonne, and vacuum outgas is cast in fire-resistant casting mold when temperature is reduced to 1550 DEG C.
nullA kind of processing characteristics convenient auto parts and components preparation method，It is characterized in that，In a，The preparation method of described modified niobium carbide is: by graphite powder、Niobium powder loads in ball grinder according to atomic mass 1:1，High-purity argon gas protection it is filled with after evacuation，In ratio of grinding media to material 40:1、Ball milling 6-6.5h under the rotating speed of rotating speed 280r/min，Then heating in vacuum 12-15min at 550-600 DEG C，After insulation 14-16min, natural cooling is standby，Aluminium powder is poured in fluid bed，It is passed through argon and gets rid of gas，It is heated to fluid bed when 280-320 DEG C injecting in bubbler carbonyl iron，Rise high-temperature to gasify to 100 DEG C of carbonyl irons，Sustained response a period of time is until carbonyl iron not re-evaporation in bubbler，Stop heating，Continue to be passed through argon until fluidized-bed temperature is cooled to room temperature and obtains the composite granule of ferrum cladding aluminum，It is added to this composite granule in above-mentioned niobium carbide powder again continue ball milling 6-7h，Cool down after heating in vacuum 1-2min at 550-600 DEG C after end.
A kind of processing characteristics convenient auto parts and components preparation method, it is characterized in that, in c, described composite refiner is made up of following raw materials according: polyvinylpyrrolidone 0.5-1, sodium bentonite 0.6-1, calcium carbonate 2.5-3, nickel oxide 0.4-0.5, carbide 2-2.5, titanium dioxide 1.2-1.7；Polyvinylpyrrolidone and sodium bentonite are mixed and adds appropriate water stirring and dissolving, calcium carbonate, nickel oxide, carbide, titanium dioxide mixing and ball milling are crossed 200 mesh sieves and obtained mixed-powder, be added in above-mentioned solution heat while stirring formation granule again by mixed-powder, it is added into again in sintering furnace with 50 DEG C/min ramp to 500 DEG C, sprays into chilling in water after sintering 1 hour and make composite refiner.
A kind of processing characteristics convenient auto parts and components preparation method, it is characterised in that in described modified niobium carbide, the quality of aluminum is 3:1-2 with the volume ratio of carbonyl iron, and the ferrum aluminum composite granule of addition and the weight ratio of niobium carbide are 1:36-38.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334565.2A CN105970080A (en) | 2016-05-18 | 2016-05-18 | Method for preparing automobile part with convenient processability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334565.2A CN105970080A (en) | 2016-05-18 | 2016-05-18 | Method for preparing automobile part with convenient processability |
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| CN105970080A true CN105970080A (en) | 2016-09-28 |
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| CN201610334565.2A Pending CN105970080A (en) | 2016-05-18 | 2016-05-18 | Method for preparing automobile part with convenient processability |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410581A (en) * | 2001-10-01 | 2003-04-16 | 住友金属工业株式会社 | Steel for mechanical structure and mfg. method thereof |
| CN104508169A (en) * | 2012-08-03 | 2015-04-08 | 新日铁住金株式会社 | Galvanized steel sheet and manufacturing method therefor |
-
2016
- 2016-05-18 CN CN201610334565.2A patent/CN105970080A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410581A (en) * | 2001-10-01 | 2003-04-16 | 住友金属工业株式会社 | Steel for mechanical structure and mfg. method thereof |
| CN104508169A (en) * | 2012-08-03 | 2015-04-08 | 新日铁住金株式会社 | Galvanized steel sheet and manufacturing method therefor |
Non-Patent Citations (1)
| Title |
|---|
| 秦森: "外加颗粒强化铁基材料的纳米NbC/Fe(Fe_3C )复合粉末制备技术及应用", 《中国博士学位论文全文数据库 工程科技I辑》 * |
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Application publication date: 20160928 |