CN109402488A - A kind of tail gas converter shell - Google Patents
A kind of tail gas converter shell Download PDFInfo
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- CN109402488A CN109402488A CN201811269673.1A CN201811269673A CN109402488A CN 109402488 A CN109402488 A CN 109402488A CN 201811269673 A CN201811269673 A CN 201811269673A CN 109402488 A CN109402488 A CN 109402488A
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- alloy
- additive
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- tail gas
- gas converter
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/08—Shaking, vibrating, or turning of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
-
- 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
- C22C38/02—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
- C22C38/04—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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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
- 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
Abstract
The present invention relates to a kind of tail gas converter shells, belong to metal material field, shell is made of steel alloy, the steel alloy is made of the raw material of following mass percent: Si:0.06-0.12%, Mn:0.1-0.2%, Ni:0.08-0.16%, Co:0.12-0.24%, Cr:0.14-0.2%, additive: 8-12%, surplus is Fe and impurity, and through alloy smelting, purification, molding is prepared, wherein Co, Cr element forms " attachment extends " effect, significantly increase alloy density, and then form extremely strong shock resistance, additive can be undergone phase transition, cause alloy volume expansion, the energy of crack propagation is absorbed simultaneously, prevent the extension of crackle, to improve the intensity and fracture toughness of alloy.
Description
Technical field
The present invention relates to a kind of tail gas converter shells, belong to metal material field.
Background technique
With the development of the social economy, more and more environmental problems are increasingly shown, till now from traditional three wastes problem
Five water control altogether, highlight everybody attention to environmental protection invariably.And the appearance of motor vehicle, in addition to promoting everybody life just
Victory also brings a large amount of tail gas output, so that atmosphere can't bear the heavy load.One of main source as air pollution, it is motor-driven
Contain a large amount of harmful substance, including carbon monoxide, nitrogen oxides, hydrocarbon and solid suspended particle etc. in tail gas,
Just belong to the scope of solid suspended particle as the PM2.5 of social concerns focus in the recent period.Vehicle exhaust is in addition to being large size city
One of main source of PM2.5 is outer, or one of the arch-criminal of many urban atmospheric pollutions, and photochemical fog is exactly that it is main
One of influence.
And the method for solving tail gas pollution of motor-driven vehicle be also it is varied, in addition to change fuel oil property other than, be more
While exhaust emissions, exhaust gas component is innoxious, this requires motor vehicles to install tail gas converter.Although tail gas hazard-free
The activity and transformation efficiency of catalyst therein are relied primarily on, still, as the shell no less important supported with guard catalyst.
Therefore, the performance of shell has been largely fixed the service life of tail gas converter, generallys use alloy progress
Preparation.
Steel alloy refers to based on iron, the addition element such as a certain amount of manganese, silicon are added and control impurity content and
The alloy system of composition.Steel alloy has both high-intensitive, high rigidity and anti-corrosion advantage, is suitable as structural material.But it is traditional
Steel alloy it is not anti-corrosion and environmental change can not be adapted to.
The disadvantages of small for conventional alloys steel elongation after fracture, publication number 108239724A discloses a kind of steel alloy,
The elongation after fracture of alloy is promoted by changing alloying element content.However, the elongation after fracture for only promoting alloy is difficult to completely
Sufficient alloy copes with different environment.
Summary of the invention
In view of the above problems, the present invention provides the good tail gas converter shell of comprehensive performance.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of tail gas converter shell, the shell are made of steel alloy, and the steel alloy is by following quality percentage
The raw material of ratio forms: Si:0.06-0.12%, Mn:0.1-0.2%, Ni:0.08-0.16%, Co:0.12-0.24%, Cr:
0.14-0.2%, additive: 8-12%, surplus are Fe and impurity.
Preferably, the additive includes one of thallium oxide, zirconium oxide, vanadium boride, barium slilicide or a variety of.
Further preferably, when additive be thallium oxide, zirconium oxide mixture when, thallium oxide, zirconium oxide volume ratio be
3-5:1；When additive be zirconium oxide, vanadium boride mixture when, zirconium oxide, vanadium boride volume ratio be 2-4:1；Work as additive
For vanadium boride, barium slilicide mixture when, vanadium boride, barium slilicide volume ratio be 1-5:1.
In alloy system of the invention, cooperation combination is carried out using Co, Cr element of proper content.And Co, Cr element remove
Element itself to the humidification of alloy outside, also will form " attachment extends " effect, i.e., in alloy smelting, both elements
Can enter easily in the range of other elements combine but independent at phase, form par wise irrelevance with other elements, but mutually according to
The relationship deposited, shows on alloy property, is to significantly increase alloy density, and then form extremely strong shock resistance.
In addition, the present invention particularly adds special additive, preferably thallium oxide, zirconium oxide, vanadium boride, barium slilicide
Four mixtures in proportion, using the addition form of compound, a single-element that can use in compound is to alloy
Enhanced, first alloy is modified with the group effect of compound.
By taking thallium oxide as an example, since alloy is easy effect by power, easy formation crackle, generated when bearing external force in
Under stress or under the action of material internal crack tip stress field, the constraint of thallium oxide is released, and is undergone phase transition, and is drawn
Volume expansion is played, while absorbing the energy of crack propagation, the extension of crackle is prevented, to improve the intensity and fracture of alloy
Toughness.Meanwhile by the phase transformation of additive, micro-crack can be generated in alloy system, under the action of tensile stress, micro-crack or micro-
Larger micro-crack and the lead crack formed after crack growth converges, and the extensions path of lead crack is caused to be distorted and bifurcated, increases
The extensions path for adding crackle, reduces the energy of lead crack, to improve the intensity and toughness of material.These four additive packages
It is added, toughening can be complementary to one another, form the actual effect that 1+1 is greater than 2.
The present invention additionally provides another technical solution while reasonable selection material mixture ratio:
A kind of preparation method of tail gas converter shell, includes the following steps:
(1) alloy smelting: being weighed by above-mentioned raw material, additive is crushed powder processed, first by the modifying agent of 20-40%
It is coated uniformly on smelting furnace bottom, adds other materials, is thermally formed aluminium alloy；
(2) it refines: fast cold treatment being carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and is spilt in half
Solid alloy surface, then to semi-solid alloy pressurization sonic oscillation processing, spontaneous curing forms alloy block；
(3) it forms: alloy block is machined, combine, be assembled into tail gas converter shell, last fit on catalyst
Obtain tail gas converter.
The present invention adds in batches in the smelting process of alloy, by additive, and the effect of formation is greater than disposable add
Enter.First additive is coated on and smelts furnace bottom, can sufficiently completely cut off contact of the furnace bottom with alloy, avoid alloy uneven heating and
Hot-spot is caused, it is excessive in turn result in phase transformation, and alloy is made to become fragile.Meanwhile using pressurization sonic oscillation, so that semisolid alloy
Internal homogenising filamentous form is formed, at this point, the additive of matching surface, is pressed into using pressure, so that additive
It can incorporate well on the contact surface between fibril and fibril, form the three-dimensional combination effect of point, line, surface, greatly enhance
The tensile strength and elongation at break of alloy.
Preferably, the pressure of step (2) the pressurization sonic oscillation is 3-5 atmospheric pressure.
Preferably, the supersonic frequency of step (2) the pressurization sonic oscillation is 14-18kHz, power 1000-
1200W。
The pressure and sonic oscillation frequency that strict control applies can make semisolid alloy filaments homogenize, and can incite somebody to action
The gradual reinforcing of carry out of additive from outward appearance to inner essence.
Preferably, step (3) described inner surface of outer cover also carries out annular protrusion attachment processing.
Further preferably, the annular protrusion is that hydrotalcite inside the shell precipitate by surface.
Further preferably, the annular protrusion spacing is identical, and annular protrusion is horizontal by 30-60 °.
Due to consideration that interior of shell also needs to place catalyst, surface carries out nano hydrotalcite precipitating inside the shell, i.e.,
The protrusion naked eyes of formation are invisible, but have apparent sense of touch, meanwhile, convex surfaces are also formed with a large amount of mesoporous, Ke Yi great
It is big to increase motor-vehicle tail-gas residence time in converter, it is complete convenient for catalysis.
Compared with prior art, the present invention has the advantage that
(1) Co, Cr element of the present invention forms " attachment extends " effect, significantly increases alloy density, and then formed extremely strong
Shock resistance.
(2) additive can be undergone phase transition in the present invention, cause alloy volume expansion, while absorbing the energy of crack propagation,
The extension for preventing crackle, to improve the intensity and fracture toughness of alloy.
(3) present invention is pressed into using pressurization sonic oscillation, the additive of matching surface using pressure, so that addition
Agent can incorporate well on the contact surface between fibril and fibril, form the three-dimensional combination effect of point, line, surface, greatly enhance
The tensile strength and elongation at break of alloy.
(4) progress nano hydrotalcite in surface precipitates to form protrusion the present invention inside the shell, and convex surfaces are also formed with largely
It is mesoporous, motor-vehicle tail-gas residence time in converter can be greatly increased, it is complete convenient for catalysis.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.09%, Mn:0.1-0.2%, Ni:
0.12%, Co:0.18%, Cr:0.17%, additive: 10%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 4:1, zirconium oxide, vanadium boride volume ratio be
3:1, vanadium boride, barium slilicide volume ratio be 3:1；
Alloy smelting: additive is crushed powder processed, 30% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 4 atmospheric pressures, frequency 16kHz are applied to semi-solid alloy, power is the sonic oscillation of 1100W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
45 °, last fit on catalyst obtains tail gas converter.
Embodiment 2
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.06%, Mn:0.1%, Ni:
0.08%, Co:0.12%, Cr:0.14%, additive: 8%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 3:1, zirconium oxide, vanadium boride volume ratio be
2:1, vanadium boride, barium slilicide volume ratio be 1:1；
Alloy smelting: additive is crushed powder processed, 30% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 4 atmospheric pressures, frequency 16kHz are applied to semi-solid alloy, power is the sonic oscillation of 1100W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
45 °, last fit on catalyst obtains tail gas converter.
Embodiment 3
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.12%, Mn:0.2%, Ni:
0.16%, Co:0.24%, Cr:0.2%, additive: 12%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 5:1, zirconium oxide, vanadium boride volume ratio be
4:1, vanadium boride, barium slilicide volume ratio be 5:1；
Alloy smelting: additive is crushed powder processed, 30% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 4 atmospheric pressures, frequency 16kHz are applied to semi-solid alloy, power is the sonic oscillation of 1100W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
45 °, last fit on catalyst obtains tail gas converter.
Embodiment 4
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.09%, Mn:0.1-0.2%, Ni:
0.12%, Co:0.18%, Cr:0.17%, additive: 10%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 4:1, zirconium oxide, vanadium boride volume ratio be
3:1, vanadium boride, barium slilicide volume ratio be 3:1；
Alloy smelting: additive is crushed powder processed, 20% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 3 atmospheric pressures, frequency 14kHz are applied to semi-solid alloy, power is the sonic oscillation of 1000W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
45 °, last fit on catalyst obtains tail gas converter.
Embodiment 5
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.09%, Mn:0.1-0.2%, Ni:
0.12%, Co:0.18%, Cr:0.17%, additive: 10%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 4:1, zirconium oxide, vanadium boride volume ratio be
3:1, vanadium boride, barium slilicide volume ratio be 3:1；
Alloy smelting: additive is crushed powder processed, 40% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 5 atmospheric pressures, frequency 18kHz are applied to semi-solid alloy, power is the sonic oscillation of 1200W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
45 °, last fit on catalyst obtains tail gas converter.
Embodiment 6
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.09%, Mn:0.1-0.2%, Ni:
0.12%, Co:0.18%, Cr:0.17%, additive: 10%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 4:1, zirconium oxide, vanadium boride volume ratio be
3:1, vanadium boride, barium slilicide volume ratio be 3:1；
Alloy smelting: additive is crushed powder processed, 30% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 4 atmospheric pressures, frequency 16kHz are applied to semi-solid alloy, power is the sonic oscillation of 1100W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
30 °, last fit on catalyst obtains tail gas converter.
Embodiment 7
Ingredient: raw material is weighed by the alloy steel of above-mentioned converter shell: Si:0.09%, Mn:0.1-0.2%, Ni:
0.12%, Co:0.18%, Cr:0.17%, additive: 10%, surplus is Fe and impurity, and wherein additive is thallium oxide, oxidation
Zirconium, vanadium boride, barium slilicide mixture, and the volume ratio of thallium oxide, zirconium oxide be 4:1, zirconium oxide, vanadium boride volume ratio be
3:1, vanadium boride, barium slilicide volume ratio be 3:1；
Alloy smelting: additive is crushed powder processed, 30% modifying agent is first coated uniformly on smelting furnace bottom, is added
Other materials is thermally formed aluminium alloy；
Purification: fast cold treatment is carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and spills Yu Bangu
State alloy surface, then 4 atmospheric pressures, frequency 16kHz are applied to semi-solid alloy, power is the sonic oscillation of 1100W
Processing, spontaneous curing form alloy block；
Molding: alloy block is machined, combine, be assembled into tail gas converter shell, surface is received inside the shell
Rice hydrotalcite precipitation process forms annular protrusion, convex surfaces be also formed with it is a large amount of mesoporous, annular protrusion horizontal by
60 °, last fit on catalyst obtains tail gas converter.
Embodiment 8
Difference with embodiment 1 is only that the additive level of embodiment 8 is 7%.
Embodiment 9
Difference with embodiment 1 is only that the additive level of embodiment 9 is 13%.
Embodiment 10
Difference with embodiment 1 is only that, 10 modifying agent of embodiment directly with other raw material mixed smeltings.
Comparative example 1
Difference with embodiment 1 is only that, additive is free of in 1 raw material of comparative example.
Comparative example 2
Difference with embodiment 1 is only that comparative example 2 is without sonic oscillation processing.
Comparative example 3
Difference with embodiment 1 is only that 3 inner surface of outer cover ringless-type of comparative example is raised.
The shell of embodiment 1-10 and comparative example 1-3 are tested, its tensile strength, toughness, wearability, elongation are tested
Rate, the results are shown in Table 1:
Table 1: the performance of shell in embodiment 1-10 and comparative example 1-3
Wear-resisting property data in table refer to shell and cement surface with the loss after the rate sliding friction 1min of 1cm/s.
And after comparative example 3 lacks annular protrusion, the fixation of catalyst is not secured enough, and catalytic efficiency reduces.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of tail gas converter shell, which is characterized in that the shell is made of steel alloy, and the steel alloy is by as follows
The raw material of mass percent forms: Si:0.06-0.12%, Mn:0.1-0.2%, Ni:0.08-0.16%, Co:0.12-
0.24%, Cr:0.14-0.2%, additive: 8-12%, surplus are Fe and impurity.
2. shell according to claim 1, which is characterized in that the additive include thallium oxide, zirconium oxide, vanadium boride,
One of barium slilicide is a variety of.
3. a kind of preparation method of tail gas converter shell, which is characterized in that described method includes following steps:
(1) alloy smelting: raw material according to claim 1 is weighed, and additive is crushed powder processed, first by 20-40%'s
Modifying agent is coated uniformly on smelting furnace bottom, adds other materials, is thermally formed aluminium alloy；
(2) it refines: fast cold treatment being carried out to aluminium alloy and forms semi-solid alloy, remaining additive is uniformly spread and is spilt in semisolid
Alloy surface, then to semi-solid alloy pressurization sonic oscillation processing, spontaneous curing forms alloy block；
(3) form: alloy block is machined, combine, be assembled into tail gas converter shell, last fit on catalyst obtains tail
Gas converter.
4. preparation method according to claim 3, which is characterized in that step (2) it is described pressurization sonic oscillation pressure be
3-5 atmospheric pressure.
5. preparation method according to claim 3, which is characterized in that the supersonic frequency of step (2) the pressurization sonic oscillation
Rate is 14-18kHz, power 1000-1200W.
6. preparation method according to claim 3, which is characterized in that step (3) described inner surface of outer cover also carries out annular
Raised attachment processing.
7. preparation method according to claim 6, which is characterized in that the annular protrusion is hydrotalcite surface inside the shell
It precipitates.
8. preparation method according to claim 6, which is characterized in that the annular protrusion spacing is identical, and annular protrusion
Horizontal by 30-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269673.1A CN109402488A (en) | 2018-10-29 | 2018-10-29 | A kind of tail gas converter shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269673.1A CN109402488A (en) | 2018-10-29 | 2018-10-29 | A kind of tail gas converter shell |
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| Publication Number | Publication Date |
|---|---|
| CN109402488A true CN109402488A (en) | 2019-03-01 |
Family
ID=65469489
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| CN201811269673.1A Pending CN109402488A (en) | 2018-10-29 | 2018-10-29 | A kind of tail gas converter shell |
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| EP3323902A1 (en) * | 2016-11-22 | 2018-05-23 | Deutsche Edelstahlwerke GmbH | Steel material containing hard particles prepared by powder metallurgy, method for producing a component from such a steel material and component produced from the steel material |
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2018
- 2018-10-29 CN CN201811269673.1A patent/CN109402488A/en active Pending
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| CN1745187A (en) * | 2003-01-27 | 2006-03-08 | 新日本制铁株式会社 | High-carbon steel wire rod with high strength and high toughness |
| CN105714209A (en) * | 2016-03-23 | 2016-06-29 | 华中科技大学 | Metal base ceramic phase reinforced alloy tool steel powder for 3D printing, preparation method and application thereof |
| EP3323902A1 (en) * | 2016-11-22 | 2018-05-23 | Deutsche Edelstahlwerke GmbH | Steel material containing hard particles prepared by powder metallurgy, method for producing a component from such a steel material and component produced from the steel material |
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Application publication date: 20190301 |