CN107739975A - A kind of ternary catalyzing unit support - Google Patents
A kind of ternary catalyzing unit support Download PDFInfo
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- CN107739975A CN107739975A CN201710759561.3A CN201710759561A CN107739975A CN 107739975 A CN107739975 A CN 107739975A CN 201710759561 A CN201710759561 A CN 201710759561A CN 107739975 A CN107739975 A CN 107739975A
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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
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- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/18—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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
- C23C8/38—Treatment of ferrous surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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Abstract
The present invention relates to a kind of support, and in particular to a kind of ternary catalyzing unit support, belongs to steel field.Ternary catalyzing unit support of the present invention is made up of hot rolled steel plate, and the hot rolled steel plate is made up of the composition of following mass percent：C：0.01 0.03%, Si：0.5 1.0%, Mo：0.5 1.0%, P：≤ 0.04%, S：≤ 0.03%, Cr：10.5 11.75%, V:0.1 0.2%, N:0.01 0.05%, surplus is iron.The present invention uses the rational Steel material of compatibility, and the content of the elements such as sulphur, phosphorus is reduced using the microalloy Ca Mg Re Zr composite core-spun yarns for including Ca, Si, Mg+Ba, Re+Zr, the MnS for improving the quality of steel while having refined in steel is mingled with, and can improve the impact flexibility and polishing machine of obtained ternary catalyzing unit support.
Description
Technical field
The present invention relates to a kind of support, and in particular to a kind of ternary catalyzing unit support, belongs to steel field.
Background technology
Ternary catalyzing unit, most important outer purifier in automobile exhaust system is mounted in, it can be by vehicle exhaust
The pernicious gases such as CO, HC and NOx of discharge are changed into harmless carbon dioxide, water and nitrogen by oxidation and reduction.When
When the vehicle exhaust of high temperature passes through purifier, the cleanser in ternary catalyzing unit will strengthen the work of tri- kinds of gas of CO, HC and NOx
Property, promote it to carry out certain oxidationreduction chemical reaction, wherein CO is oxidized into colourless, nontoxic titanium dioxide at high temperature
Carbon gas；HC compounds are oxidized to water (H at high temperature2And carbon dioxide 0)；NOx is reduced into nitrogen and oxygen.Three kinds of harmful gas
Body becomes innocuous gas, vehicle exhaust is purified.
The content of the invention
The purpose of the present invention is above mentioned problem be present for existing technology, it is proposed that a kind of intensity is high, service life length
Ternary catalyzing unit support.
The above-mentioned purpose of the present invention is realized by following technical solution：A kind of ternary catalyzing unit support, the ternary are urged
Change device support to be made up of hot rolled steel plate, the hot rolled steel plate is made up of the composition of following mass percent：C：0.01-0.03%,
Si：0.5-1.0%, Mo：0.5-1.0%, P：≤ 0.04%, S：≤ 0.03%, Cr：10.5-11.75%, V:0.1-0.2%,
N:0.01-0.05%, surplus are iron.
Ternary catalyzing unit support of the present invention is made of steel, and wherein Cr content is 10.5-11.75%, is a kind of high
Cr steel, the addition of Cr elements, which can be dissolved in the matrix of steel, plays solution strengthening effect, can also be combined to form with carbon (FeCr)3C、
(FeCr)7C3Etc. the carbide of form, so as to improve the elevated temperature strength of steel and wearability, therefore, the high Cr steel that the present invention uses,
With high intensity and wearability.
In addition, in a kind of ternary catalyzing unit support of the present invention, rare earth element y is also added into.The addition of rare earth element y,
Rare earth oxysulfide, rare earth oxide and the rare-earth sulfide of a large amount of Dispersed precipitates can be formed, enhancing Heterogeneous Nucleation acts on, from
And thinning microstructure, simultaneously as rare earth atom radius ratio chromium atom radius is much bigger, therefore diffusion system of the rare earth element in steel
Number is smaller, the solute distribution coefficient very little of rare earth element, increases constitutional supercooling, so as to cause secondary dendrite spacing to reduce, two
Secondary dendrite is fined.But if excessive rare earth element is added, unnecessary rare earth element adsorbs the week in rare earth oxysulfide
Enclose so that the size increase of field trash, therefore, preferably, the addition of rare earth element y is the 0.01- of steel gross mass
0.03%.
Secondly, the present invention also added micro Mo elements, and Mo elements have solution strengthening effect, can improve the through hardening of steel
Property, postpone perlitic transformation, and post-curing element well.Mo invigoration effect is due to be analysed in tempering in martensite
Mo is gone out2Caused by C.Mo can be with C-shaped into Mo2C and MoC, can be also M with temperature increase transitions6C.With close-packed hexagonal
The Mo of dot matrix2C is separated out in martensite lath in sub boundary with parallel fine acicular (two dimension is lamellar), and and matrix
Coherence, so as to strengthen matrix.
Furthermore it is also added into V element in ternary catalyzing unit support of the present invention.V and C, N affinity are strong, can significantly improve
The hardness and wearability of steel, V4C3And strengthen carbide well, and it is still very stable at 700 DEG C, keep tiny shape
State.Their segregations are formed about air mass in dislocation line, produce reciprocation with dislocation, its sliding are prevented, so as to improve the property of steel
Energy.V-arrangement into carbide make steel that there is good thermohardening, and the crystal grain and tissue of steel can be refined, increase steel belt roof bolt is stable
Property.
In addition, a small amount of N element is also added into the present invention.N element is added in steel composition, molten iron can be increased in liquid phase
With the degree of supercooling at eutectic, making carbide forming core under bigger degree of supercooling, this not only contributes to the refinement of coarse Austenite,
Be advantageous to the refinement of eutectic carbide.In addition, N is surface active element, can be inhaled after adding molten iron on carbide base wafer
It is attached, hinder austenite to be crystallized along carbide wafer, and promote divorsed eutectic to grow.
It is another object of the present invention to provide a kind of preparation method of above-mentioned ternary catalyzing unit support, described method
Comprise the following steps：
Melting：Molten steel is hung into ladle refining furnace after the Steel material for preparing ternary catalyzing unit support addition converter is melted to enter
Row refining, after coming out of the stove, carries out pouring into a mould to obtain steel；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；
Post processing：Ternary catalyzing unit support blank obtains ternary catalyzing unit support finished product after carrying out bead, the processing of cold school.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the molten steel be hung to before ladle refining need to add it is micro-
Alloy Ca-Mg-Re-Zr composite core-spun yarns.The composite core-spun yarn is made up of the composition of following mass percent：Ca：12-
15%, Si：45-55%, Mg+Ba：3-5%, Re+Zr：6-8%, surplus Fe.Used in ternary catalyzing unit support of the present invention
The composite core-spun yarn of microalloying substitutes valuable Ni, can make the oxide in steel plate and sulfide denaturation, reduce large-scale folder
The formation of crack of miscellaneous stress concentration and Chen Sheng, the content of the elements such as sulphur, phosphorus is reduced, improves the quality of steel, while refined in steel
MnS is mingled with, and forms tiny and Dispersed precipitate duplex impurity, and they play a part of pinning crystal boundary in steel, refinement
Tissue, while steel can be made to obtain relatively low relative mass wear extent, relative wear thickness, crystal grain has been refined, has improved impact
Toughness and polishing machine.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the addition compound bags of microalloy Ca-Mg-Re-Zr
The quality of cored wire is the 0.2-0.3% of steel quality.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the normalized treatment is isothermal normalizing processing.This hair
Bright is high Cr steel, is handled and phase transformation can be controlled using isothermal normalizing, i.e., after steel austenitizing, can be quickly cooled to pearly-lustre
Body phase temperature isothermal, makes phase transformation be carried out under isothermal temperature, and it is poor to avoid banded structure, and non-equilibrium microstructure occurs, so as to for
Machining and nitrizing quenching have done tissue and performance prepares.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the temperature of the isothermal normalizing processing is 630-650
DEG C, isothermal normalizing processing time is 60-100min.The present invention is by isothermal normalizing treatment temperature and time control in above range
It is interior, the hardness of steel can be controlled in very narrow scope, obtain the hardness number of optimized cutting processing, be easy to follow-up machinery
Processing, moreover, steel can obtain the metallographic structure of uniform and delicate.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the Nitrizing Treatment is handled using glow discharge nitriding, is oozed
The temperature of nitrogen processing is 400-450 DEG C, time 1-2h, voltage 500-700V, working gas N2With H2Gaseous mixture, and
Volume ratio is 2-3:1.The present invention uses Carburization Treatment, and by nitrogen in the diffusion of die surface, certain thickness is formed in die surface
The nitriding layer of degree.Nitriding layer has very high hardness, wearability, corrosion resistance, so as to improve ternary catalyzing unit support of the present invention
Surface strength, the service life of extending bracket.Nitriding layer is made up of the compound layer and diffusion layer on surface.Compound layer is by two
Phase composition, its hardness is high, and the compound layer formed is fine and close, has well to wear-resistant and corrosive nature.Diffusion layer includes
There are the elements such as a large amount of Mo, V, Cr being solid-solubilized in ferrite and a variety of alloy nitrides of nitrogen generation, significantly improve nitriding layer
Hardness, surface forms larger residual compressive stress after nitriding, can offset the additional tension in part, show infiltration layer fatigue strength
Write and improve.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the QPT handling process is respectively Quenching Treatment, carbon
Distribution, temper, it specifically comprises the following steps：300-400S is incubated at 900-920 DEG C, salt bath is quenched to 220-240 DEG C, then
20-30S is incubated at 400-450 DEG C and carries out carbon distribution and tempering, then with water quenching to room temperature.The present invention carries out heat using QPT methods
Processing, quenched martensite matrix can be utilized to ensure high intensity, at the same it is steady using distribution principle of the carbon from martensite to austenite
Determine retained austenite to room temperature to strengthen toughness, and make full use of during tempering separate out complicated carbide come further optimize intensity and
Increase toughness.
In a kind of above-mentioned preparation method of ternary catalyzing unit support, the operating pressure of the bead is 3.0-
3.2Bar, nozzle translational speed are 200-250mm/min, bullet flow is 8-10kg/min.Workpiece surface passes through shot peening strengthening
After processing, the institutional framework of workpiece surface can occur significantly to change, such as surface layer grain refinement, dislocation density increase, remnants
Austenite reduction etc..The change of institutional framework, it imply that the change of workpiece surface performance.
Compared with prior art, the invention has the advantages that：
1st, the present invention uses the rational Steel material of compatibility, and using the microalloy Ca- for including Ca, Si, Mg+Ba, Re+Zr
Mg-Re-Zr composite core-spun yarns improve the quality of steel while have refined the MnS in steel and press from both sides to reduce the content of the elements such as sulphur, phosphorus
It is miscellaneous, the impact flexibility and polishing machine of steel can be improved.
2nd, the present invention uses high Cr steel, and the methods of isothermal normalizing processing, QPT processing is used in preparation method, can
The ternary catalyzing unit support intensity for making to obtain is high；
3rd, ternary catalyzing unit support of the present invention uses special steel, and configures rational preparation method, so as to get three
First catalyst converter support material is frivolous, easy to use, plasticity is strong.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, after coming out of the stove,
Carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy Ca- that quality is steel quality 0.2% before being hung to ladle refining
Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：12%, Si：45%, Mg+
Ba：3%, Re+Zr：6%, surplus Fe；Wherein, the composition of steel is：C：0.01%, Si：0.5%, Y：0.01%, Mo：
0.5%, P：0.02%, S：0.01%, Cr：10.5%, V:0.1%, N:0.01%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 630 DEG C, and isothermal normalizing processing time is 60min；The temperature of Nitrizing Treatment is 400 DEG C, when
Between be 1h, voltage 500V, working gas N2With H2Gaseous mixture, and volume ratio be 2:1；QPT handling process is respectively to quench
Processing, carbon distribution, temper, it specifically comprises the following steps：300S is incubated at 900 DEG C, salt bath is quenched to 220 DEG C, then 400
DEG C insulation 20S carries out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.0Bar, nozzle translational speed is 200mm/min, bullet flow is
8kg/min。
Embodiment 2：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, after coming out of the stove,
Carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy Ca- that quality is steel quality 0.22% before being hung to ladle refining
Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：12.6%, Si：48%, Mg+
Ba：3.4%, Re+Zr：6.4%, surplus Fe；Wherein, the composition of steel is：C：0.014%, Si：0.6%, Y：
0.014%, Mo：0.6%, P：0.015%, S：0.015%, Cr：10.75%, V:0.12%, N:0.018%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 634 DEG C, and isothermal normalizing processing time is 68min；The temperature of Nitrizing Treatment is 410 DEG C, when
Between be 1.2h, voltage 540V, working gas N2With H2Gaseous mixture, and volume ratio be 2.2:1；QPT handling process is respectively
Quenching Treatment, carbon distribution, temper, it specifically comprises the following steps：320S is incubated at 904 DEG C, salt bath is quenched to 224 DEG C, then
22S are incubated at 410 DEG C and carry out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.04Bar, nozzle translational speed is 210mm/min, bullet flow is
8.4kg/min。
Embodiment 3：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, after coming out of the stove,
Carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy Ca- that quality is steel quality 0.24% before being hung to ladle refining
Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：13.2%, Si：50%, Mg+
Ba：3.8%, Re+Zr：6.8%, surplus Fe；Wherein, the composition of steel is：C：0.018%, Si：0.7%, Y：
0.018%, Mo：0.7%, P：0.025%, S：0.01%, Cr：11%, V:0.14%, N:0.026%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 638 DEG C, and isothermal normalizing processing time is 76min；The temperature of Nitrizing Treatment is 420 DEG C, when
Between be 1.4h, voltage 580V, working gas N2With H2Gaseous mixture, and volume ratio be 2.4:1；QPT handling process is respectively
Quenching Treatment, carbon distribution, temper, it specifically comprises the following steps：340S is incubated at 908 DEG C, salt bath is quenched to 228 DEG C, then
24S are incubated at 420 DEG C and carry out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.08Bar, nozzle translational speed is 220mm/min, bullet flow is
8.8kg/min。
Embodiment 4：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, after coming out of the stove,
Carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy Ca- that quality is steel quality 0.26% before being hung to ladle refining
Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：13.8%, Si：52%, Mg+
Ba：4.2%, Re+Zr：7.2%, surplus Fe；Wherein, the composition of steel is：C：0.022%, Si：0.8%, Y：
0.022%, Mo：0.8%, P：0.02%, S：0.015%, Cr：11.25%, V:0.16%, N:0.034%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 642 DEG C, and isothermal normalizing processing time is 84min；The temperature of Nitrizing Treatment is 430 DEG C, when
Between be 1.6h, voltage 620V, working gas N2With H2Gaseous mixture, and volume ratio be 2.6:1；QPT handling process is respectively
Quenching Treatment, carbon distribution, temper, it specifically comprises the following steps：360S is incubated at 912 DEG C, salt bath is quenched to 232 DEG C, then
26S are incubated at 430 DEG C and carry out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.12Bar, nozzle translational speed is 230mm/min, bullet flow is
9.2kg/min。
Embodiment 5：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, after coming out of the stove,
Carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy Ca- that quality is steel quality 0.28% before being hung to ladle refining
Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：14.2%, Si：54%, Mg+
Ba：4.6%, Re+Zr：7.6%, surplus Fe；Wherein, the composition of steel is：C：0.026%, Si：0.9%, Y：
0.026%, Mo：0.9%, P：0.025%, S：0.01%, Cr：11.5%, V:0.18%, N:0.042%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 646 DEG C, and isothermal normalizing processing time is 92min；The temperature of Nitrizing Treatment is 440 DEG C, when
Between be 1.8h, voltage 660V, working gas N2With H2Gaseous mixture, and volume ratio be 2.8:1；QPT handling process is respectively
Quenching Treatment, carbon distribution, temper, it specifically comprises the following steps：380S is incubated at 916 DEG C, salt bath is quenched to 236 DEG C, then
28S are incubated at 440 DEG C and carry out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.16Bar, nozzle translational speed is 240mm/min, bullet flow is
9.6kg/min。
Embodiment 6：
Melting：Molten steel is hung into ladle refining furnace after following Steel material addition converter is melted to be refined, come out of the stove
Afterwards, carry out pouring into a mould to obtain steel；Wherein, molten steel needs to add the microalloy that quality is steel quality 0.3% before being hung to ladle refining
Ca-Mg-Re-Zr composite core-spun yarns, composite core-spun yarn are made up of the composition of following mass percent：Ca：15%, Si：55%, Mg
+Ba：5%, Re+Zr：8%, surplus Fe；Wherein, the composition of steel is：C：0.03%, Si：1%, Y：0.03%, Mo：
1%, P：0.01%, S：0.01%, Cr：11.75%, V:0.2%, N:0.05%, surplus is iron；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；Its
In, the temperature of isothermal normalizing processing is 650 DEG C, and isothermal normalizing processing time is 100min；The temperature of Nitrizing Treatment is 450 DEG C,
Time is 2h, voltage 700V, working gas N2With H2Gaseous mixture, and volume ratio be 3:1；QPT handling process is respectively to quench
Fire processing, carbon distribution, temper, it specifically comprises the following steps：400S is incubated at 920 DEG C, salt bath is quenched to 240 DEG C, then
450 DEG C of insulation 30S carry out carbon distribution and tempering, then with water quenching to room temperature；
Post processing：Ternary catalyzing unit support blank carries out packing to obtain ternary catalyzing unit after carrying out bead, the processing of cold school
Support finished product, wherein, the operating pressure of bead is 3.2Bar, nozzle translational speed is 250mm/min, bullet flow is
10kg/min。
Comparative example 1
The comparative example differs only in embodiment 1, Mo is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 2
The comparative example differs only in embodiment 1, Cr is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 3
The comparative example differs only in embodiment 1, Y is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 4
The comparative example is differed only in embodiment 1, and it is compound that microalloy Ca-Mg-Re-Zr is added without in the comparative example
Core-spun yarn, other are same as Example 1, are not repeated herein.
Comparative example 5
The comparative example differs only in embodiment 1, does not use QPT handling process in the comparative example, other and implementation
Example 1 is identical, is not repeated herein.
Ternary catalyzing unit support in embodiment 1-6 and comparative example 1-5 is subjected to performance test, test result is as shown in table 2.
It follows that ternary catalyzing unit support of the present invention uses special steel, and configure rational preparation method so that
Not only intensity is high for the ternary catalyzing unit support arrived, and material is frivolous, easy to use, plasticity is strong.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of ternary catalyzing unit support, it is characterised in that the ternary catalyzing unit support is made up of hot rolled steel plate, the hot rolling
Steel plate is made up of the composition of following mass percent：C：0.01-0.03%, Si：0.5-1.0%, Mo：0.5-1.0%, P：≤
0.04%, S：≤ 0.03%, Cr：10.5-11.75%, V:0.1-0.2%, N:0.01-0.05%, surplus are iron.
2. a kind of ternary catalyzing unit support according to claim 1, it is characterised in that in the ternary catalyzing unit support also
Rare earth element y is added, the addition of the rare earth element y is the 0.01-0.03% of steel gross mass.
A kind of 3. ternary catalyzing unit support according to claim 1, it is characterised in that the system of the ternary catalyzing unit support
Preparation Method comprises the following steps：
Melting：The Steel material for preparing ternary catalyzing unit support is added after converter is melted molten steel is hung to ladle refining furnace progress essence
Refining, after coming out of the stove, carries out pouring into a mould to obtain steel；
Heat treatment：Ternary catalyzing unit support blank is obtained after steel are carried out into normalized treatment, Nitrizing Treatment, QPT processing；
Post processing：Ternary catalyzing unit support blank obtains ternary catalyzing unit support finished product after carrying out Shot Blasting, the processing of cold school.
A kind of 4. ternary catalyzing unit support according to claim 3, it is characterised in that the molten steel be hung to ladle refining it
It is preceding to add microalloy Ca-Mg-Re-Zr composite core-spun yarn of the quality for the 0.2-0.3% of steel quality.
5. a kind of ternary catalyzing unit support according to claim 4, it is characterised in that the composite core-spun yarn is by following matter
Measure the composition composition of percentage：Ca：12-15%, Si：45-55%, Mg+Ba：3-5%, Re+Zr：6-8%, surplus Fe.
A kind of 6. ternary catalyzing unit support according to claim 3, it is characterised in that the temperature of the isothermal normalizing processing
For 630-650 DEG C, isothermal normalizing processing time is 60-100min.
7. a kind of ternary catalyzing unit support according to claim 3, it is characterised in that the Nitrizing Treatment is oozed using ion
Nitrogen processing, the temperature of Nitrizing Treatment is 400-450 DEG C, time 1-2h, voltage 500-700V, working gas N2With H2's
Gaseous mixture, and volume ratio is 2-3:1.
8. a kind of ternary catalyzing unit support according to claim 3, it is characterised in that the QPT handling process is respectively
Quenching Treatment, carbon distribution, temper, it specifically comprises the following steps：900-920 DEG C be incubated 300-400S, salt bath quench to
220-240 DEG C, then be incubated at 400-450 DEG C 20-30S and carry out carbon distribution and tempering, then with water quenching to room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295411A (en) * | 2018-12-06 | 2019-02-01 | 山东建筑大学 | A kind of automobile transmission gear under Q&P&T technique |
| CN110923566A (en) * | 2019-08-22 | 2020-03-27 | 华达汽车科技股份有限公司 | Three way catalyst converter support |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041450A (en) * | 2009-10-23 | 2011-05-04 | 宝山钢铁股份有限公司 | Ferrite heat resisting steel and manufacture method thereof |
| CN103131951A (en) * | 2011-11-24 | 2013-06-05 | 江苏星火特钢有限公司 | Ferrite heat-resistant steel |
| CN103131953A (en) * | 2011-11-24 | 2013-06-05 | 江苏星火特钢有限公司 | Ferrite heat-resistant steel and production method thereof |
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2017
- 2017-08-30 CN CN201710759561.3A patent/CN107739975A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041450A (en) * | 2009-10-23 | 2011-05-04 | 宝山钢铁股份有限公司 | Ferrite heat resisting steel and manufacture method thereof |
| CN103131951A (en) * | 2011-11-24 | 2013-06-05 | 江苏星火特钢有限公司 | Ferrite heat-resistant steel |
| CN103131953A (en) * | 2011-11-24 | 2013-06-05 | 江苏星火特钢有限公司 | Ferrite heat-resistant steel and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295411A (en) * | 2018-12-06 | 2019-02-01 | 山东建筑大学 | A kind of automobile transmission gear under Q&P&T technique |
| CN110923566A (en) * | 2019-08-22 | 2020-03-27 | 华达汽车科技股份有限公司 | Three way catalyst converter support |
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