CN109880991A - A kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller - Google Patents
A kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller Download PDFInfo
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Abstract
The invention discloses a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, the following steps are included: after (1) fixes the wheel disc or shrouding disc that need to be heat-treated and high temperature deform-proof tire, it hangs in dedicated heat treatment process furnace, dedicated heat treatment process furnace is automatically performed solid solution and Wetted constructures；(2) it after fixing blade and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace, dedicated heat treatment process furnace is automatically performed solid solution and Wetted constructures；(3) by step (1) treated wheel disc and shrouding disc, treated that blade carries out welding with step (2) respectively.Production technology provided by the invention realizes the high-strength soldering effect of stainless steel and stainless steel or steel alloy, and the impeller produced is durable.
Description
Technical field
The present invention relates to Environmental-protecting dust-removing blower fields, particularly relate to a kind of high anticorrosion antiwear once dust collection of converter wind
The thermal treatment production process of machine impeller.
Background technique
In steel-making dust-removal system, once dust collection of converter blower is unique core drive equipment, a large amount of coal gas of converter
In flow process, coal gas of converter is purified, recycles and arranges so that gas generates flowing by the acting of draught fan impeller
It puts.
Coal gas of converter is made of CO, CO2, N2, O2, SO2, NOX and vapor, in which:
1:NO+O2=> 2NO2 ↑ 3NO2+H2O=2HNO3+NO ↑
2:SO2+H2O → H2SO4 (dilute) H2SO4+Fe → FeSO4+H ↑
From the foregoing, it can be seen that the presence of NOX, SO2 and vapor leads to the corrosion of dust technology and dilute sulfuric acid to impeller.
Currently, the blade in steelmaking converter primary dedusting draught fan impeller generallys use high-strength alloy steel production, this material is strong
Though degree is high, do not have anti-corrosion function, and because coal gas of converter medium contains stronger sour corrosion, the strength of materials is caused to be lost
It loses, leading to impeller, there are serious worn out, cracking phenomenas.Therefore service life is short (generally scrapping at 1 year or so)；Online fortune
The problems such as row time short (general operation will shut down cleaning impeller for 10 days or so), thus seriously affect rhythm of production.
In existing example, only by taking three steel mills of Wuhan Iron and Steel Plant as an example: Wuhan Iron and Steel Plant one was made steel before 2005, to scrap 2 every year
~3 group rotors.Wuhan Iron and Steel Plant two is made steel will scrap 3~4 group rotors every year.Wuhan Iron and Steel Plant three makes steel 2004 and orders 6 sets of new rotor.Annual steel-making
Its feature of the rotor that factory scraps all is that the blade in impeller is corroded.The original steel-making of Chengdu-Chongqing Fan Tai Science and Technology Ltd. steel mill
Blower will shut down cleaning impeller less than one month.For another example: iron company, Hebei Xin Gang iron company, Laigang be forever in length and breadth in Hebei
High-speed steel ironworks, Shandong Lu Li steel mill etc. are substantially so.There is an urgent need to a kind of once dust collection of converter blower energy for national steel mill
The product of impeller life and on-line operation time is enough greatly improved, the core effect of such product is in impeller.
Precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is a kind of acid-resistant stainless steel, and in impeller work, surface is raw
At Cr2O3 protective film (passivating film), contact of the iron atom with acid medium in steel is isolated, has played the role of acid corrosion-resistant.
Precipitation-hardening stainless steel intensity is high, its big song of hardness takes intensity up to 1050MPa.It is austenitic stainless steel such as 304,
The materials song such as 316,1Cr18Ni9Ti takes 4 times of intensity (σ s=255MPa).It fully meets and does once dust collection of converter draught fan impeller
Condition.In short, using this material (0Cr14Ni6Mo2Cu2Nb) in the case where corroding and wearing stronger severe environmental conditions
Draught fan impeller is entirely capable of reaching not only wear-resisting but also corrosion-resistant good result.
Shallow lake hardening stainless steel blade (0Cr14Ni6Mo2Cu2Nb) differed with steel alloy (15MnNiCrMo2V) its material compared with
Greatly.One is stainless steels, and one is steel alloys, and welding stress is different, weldment easily modification or cracking.Therefore, the present invention provides
A kind of completely new impeller thermal treatment production process.
Summary of the invention
To solve the problems mentioned above in the background art, the purpose of the present invention is to provide a kind of high anticorrosion antiwear converters
The thermal treatment production process of primary dedusting draught fan impeller.
To achieve the above object, the technical scheme adopted by the invention is as follows:
The present invention provides a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, including following
Step:
(1) it after fixing the wheel disc or shrouding disc that need to be heat-treated and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace,
Dedicated heat treatment process furnace is automatically performed solid solution and Wetted constructures；
(2) it after fixing blade and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace, dedicated heat treatment process furnace
It is automatically performed solid solution and Wetted constructures；
(3) by step (1) treated wheel disc and shrouding disc, treated that blade carries out welding with step (2) respectively, specifically
Steps are as follows:
During (3-1) welding, step (1) treated wheel disc, step (2) treated blade and welding rod are hung in
In dedicated heat treatment process furnace, it is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until wheel disc and blade pass through
Welding rod group is welded into impeller blank to be processed, then hangs in dedicated heat treatment process furnace and carries out welding stress-removal processing；
Treated impeller blank obtained by (3-1) and step (1) shrouding disc and welding rod are hung in dedicated heat treatment by (3-2)
It in technique furnace, is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until impeller blank and shrouding disc pass through welding rod group
It is welded into rough machined impeller, then impeller is hung in dedicated heat treatment process furnace and carries out welding stress-removal processing to get impeller.
In above-mentioned technical proposal, the impeller includes wheel disc, shrouding disc and multiple blades, and the blade includes linear leaf
And short blade, impeller are respectively welded with wheel disc, shrouding disc by blade and are formed, and is described using the long and short blade shape of the double-deck slit type
Linear leaf and short blade on impeller are staggeredly in concentric circles arrangement.
In above-mentioned technical proposal, wheel disc or shrouding disc solution treatment in step (1) specifically: be warming up to wheel disc or shrouding disc
1h is kept the temperature after 850 DEG C, then proceedes to be warming up to 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein it is dissolved
Lead to argon gas protection when processing；
Wheel disc or shrouding disc Wetted constructures in step (1) specifically: by after solution treatment wheel disc or shrouding disc be warming up to
Air is cooling after 500-700 DEG C of heat preservation 5-6h.
In above-mentioned technical proposal, blade solution treatment in step (2) specifically: 1h is kept the temperature after blade is warming up to 850 DEG C,
It then proceedes to be warming up to 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein lead to argon gas when solution treatment to protect
Shield；
Blade Wetted constructures in step (2) specifically: the blade after solution treatment is warming up to 500-700 DEG C of heat preservation 5h
Air is cooling afterwards.
In above-mentioned technical proposal, the welding stress-removal in step (3-1) and step (3-2) handles specific steps are as follows: will apply
The workpiece of postwelding, i.e. impeller blank and impeller are warming up to 500-700 DEG C of heat preservation 7h, and then air is cooling.
In above-mentioned technical proposal, blade uses precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb；Wheel disc and shrouding disc are adopted
With steel alloy 15MnNiCrMo2V.
In above-mentioned technical proposal, blade, wheel disc and shrouding disc are all made of precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb.
In above-mentioned technical proposal, precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is forged before being polished into workpiece
Heat treatment, after specially precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is forged, after 850 DEG C of heat preservations adjust 1h, 1050
DEG C solution treatment 2-5h, then air is cooling after 640 DEG C of Wetted constructures 5-6h.
In above-mentioned technical proposal, the selection of welding rod meets the following conditions in step (3-1) and step (3-2): alloying element
Including Cr, Ni and Mo；Elongation percentage is 20~25%；Tensile strength is 800~850MPa；Hardness is HB 90~96.
Compared with prior art, the beneficial effects of the present invention are:
1, the heat treatment process of production impeller provided by the invention, due to increasing the technique of innovation, with former common process
Weldering is compared, and has the advantage that the intensity 1. welded is high, test data proves commissure strength of parent δ b >=800MPa.2. eliminating
Internal stress (never occur postwelding crack existing angle).3. the height of intact two kinds of unlike materials for realizing stainless steel and steel alloy is fierce
Connect effect.4. weldment is durable, Wuhan Iron and Steel Plant one makes steel rotor 2019 manufactured within 2005 also with 14 years as long as.It is military
Previous service life of the part rotor never greater than 1 year of one steel-making of steel.
2, the present invention is using full precipitation-hardening stainless steel impeller (i.e. blade, wheel disc and shrouding disc use precipitation-hardening stainless steel)
Or half precipitation-hardening stainless steel impeller (i.e. blade uses precipitation-hardening stainless steel, wheel disc, and shrouding disc uses high-strength alloy steel material),
And the impeller for providing heat treatment process production makes the blade material in impeller most easy to damage durable, improves than prophyll wheel
5-10 times of service life, or even more than.It is equivalent to we a set of rotor and supports 5-10 and cover the use value of original rotor.By every
2 sets of operation blowers of a steel mill, every about 40 Wan Yuanji of set rotor can save about 400~8,000,000 yuan every year for enterprise.It mentions simultaneously
It is 2-3 times of the on-line operation time high, that is, reducing the shutdown of 2 times or more, tear machine open, clears up impeller and do dynamically balanced work
Make, keeps the stability of steel-making.
3, smooth blade surface used in the impeller of technique production provided by the present invention, non-corrosive, while blade is adopted
It is a kind of acid-resistant stainless steel with precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb, in impeller work, Surface Creation Cr2O3
Protective film (passivating film) has been isolated contact of the iron atom with acid medium in steel, has played the role of acid corrosion-resistant.So that blower
Impeller is entirely capable of reaching not only wear-resisting but also corrosion-resistant good result, and the workload of about half is reduced for steel-making blower maintenance workers.
Detailed description of the invention
Fig. 1 is the structural schematic diagram using impeller produced by the invention；
Fig. 2 is the sectional view in Fig. 1 on the direction A-A；
Description of symbols:
1, wheel disc；2, shrouding disc；3, blade；3-1, linear leaf；3-2, short blade.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
The drawings and specific embodiments, how the present invention is further explained implements.
The present invention provides a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, including following
Step:
(1) it after fixing the wheel disc or shrouding disc that need to be heat-treated and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace,
Dedicated heat treatment process furnace is automatically performed solid solution and Wetted constructures；
(2) it after fixing blade and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace, dedicated heat treatment process furnace
It is automatically performed solid solution and Wetted constructures；
(3) by step (1) treated wheel disc and shrouding disc, treated that blade carries out welding with step (2) respectively, specifically
Steps are as follows:
During (3-1) welding, step (1) treated wheel disc, step (2) treated blade and welding rod are hung in
In dedicated heat treatment process furnace, it is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until wheel disc and blade pass through
Welding rod group is welded into impeller blank to be processed, then hangs in dedicated heat treatment process furnace and carries out welding stress-removal processing；
Treated impeller blank obtained by (3-1) and step (1) shrouding disc and welding rod are hung in dedicated heat treatment by (3-2)
It in technique furnace, is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until impeller blank and shrouding disc pass through welding rod group
It is welded into rough machined impeller, then impeller is hung in dedicated heat treatment process furnace and carries out welding stress-removal processing to get impeller.
As depicted in figs. 1 and 2, in the present invention, impeller includes wheel disc 1, shrouding disc 2 and multiple blades 3, and the blade 3 wraps
Linear leaf 3-1 and short blade 3-2 are included, impeller is divided using the long and short blade shape of the double-deck slit type by blade 3 and wheel disc 1, shrouding disc 2
It is not welded to form, the linear leaf 3-1 on the impeller and short blade 3-2 are staggeredly in concentric circles arrangement.
In the present invention, wheel disc or shrouding disc solution treatment in step (1) specifically: after wheel disc or shrouding disc are warming up to 850 DEG C
1h is kept the temperature, then proceedes to be warming up to 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein when solution treatment
Logical argon gas protection；
Wheel disc or shrouding disc Wetted constructures in step (1) specifically: by after solution treatment wheel disc or shrouding disc be warming up to
Air is cooling after 500-700 DEG C of heat preservation 5-6h.
In the present invention, blade solution treatment in step (2) specifically: blade is warming up to after 850 DEG C and keeps the temperature 1h, then after
Continuous to be warming up to 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein lead to argon gas protection when solution treatment；
Blade Wetted constructures in step (2) specifically: the blade after solution treatment is warming up to 500-700 DEG C of heat preservation 5h
Air is cooling afterwards.
In the present invention, the welding stress-removal in step (3-1) and step (3-2) handles specific steps are as follows: after welding
Workpiece, i.e. impeller blank and impeller are warming up to 500-700 DEG C of heat preservation 7h, and then air is cooling.Stress-removal is welded to handle so that weldering
After be not in existing angle of cracking.
In the present invention, blade uses precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb, tensile strength δ b >=800MPa, sinks
Shallow lake hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is processed into before workpiece (blade) by calcining heat treatment；Wheel disc and shrouding disc are adopted
With steel alloy 15MnNiCrMo2V, tensile strength δ b >=800MPa.Or to be all made of precipitation-hardening stainless for blade, wheel disc and shrouding disc
Steel 0Cr14Ni6Mo2Cu2Nb；Precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is processed into workpiece (blade, wheel disc and shrouding disc)
Before by calcining heat treatment.Forging heat treatment specifically: after precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb forging,
After 850 DEG C of heat preservation adjustment 1h, 1050 DEG C of solution treatment 2-5h, then air is cooling after 640 DEG C of Wetted constructures 5-6h.
In the present invention, since the material properties of two kinds of steel of precipitation-hardening stainless steel and high-strength alloy steel has a long way to go, weldering
Item first has to select:
I) equal strength matches wlding.
Ii) the compatible wlding of metallographic structure.
Iii) in the suitable heat treatment condition wlding of blade.
Iv) the wlding that postwelding can be machined.
The selection of welding rod meets the following conditions in step (3-1) and step (3-2): alloying element includes Cr, Ni and Mo；Prolong
Stretching rate is 20~25%；Tensile strength is 800~850MPa；Hardness is HB90~96.
Embodiment 1
Instrument: 1. dedicated heat treatment process furnace is a set of；2. high temperature power control cabinet is a set of (alarm of semi-automatic-controlled band)；3. high temperature is preapred for an unfavorable turn of events
Type tire；4. special welding rack；5. thermometric primary instrument is several；Instrument is purchased from market.
Blade, wheel disc and shrouding disc are all made of precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb.
The present invention provides a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, including following
Step:
(1) wheel is reprocessed into after raw material precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb being carried out forging heat treatment
Lid, shrouding disc and blade；Wherein forging heat treatment specifically: after precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb forging,
After 850 DEG C of heat preservation adjustment 1h, 1050 DEG C of solution treatment 2-5h, then air is cooling after 640 DEG C of Wetted constructures 5-6h.
(2) it after fixing (1) resulting wheel disc or shrouding disc and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace,
Dedicated heat treatment process furnace keeps the temperature 1h after wheel disc or shrouding disc are warming up to 850 DEG C automatically, then proceedes to be warming up to 1000-1100 DEG C
Solution treatment 2-5h is carried out, then air is cooling；
Wherein lead to argon gas protection when solution treatment；By after solution treatment wheel disc or shrouding disc be warming up to 500-700 DEG C of heat preservation
Air is cooling after 5-6h；
(3) it after fixing blade obtained by (1) and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace, at dedicated heat
Science and engineering skill furnace keeps the temperature 1h after blade is warming up to 850 DEG C automatically, then proceedes to be warming up to 1000-1100 DEG C of progress solution treatment 2-
5h, then air is cooling；Wherein lead to argon gas protection when solution treatment；Blade after solution treatment is warming up to 500-700 DEG C of guarantor
Air is cooling after warm 5h.
(4) by step (2) treated wheel disc and shrouding disc, treated that blade carries out welding with step (3) respectively, specifically
Steps are as follows:
During (4-1) welding, step (2) treated wheel disc, step (3) treated blade and welding rod are hung in
It in dedicated heat treatment process furnace, is warming up to 200 DEG C and continues to hang out welding after keeping the temperature 2h, until wheel disc and blade pass through welding rod group
It is welded into impeller blank to be processed, then hangs in dedicated heat treatment process furnace and carries out welding stress-removal processing；
Treated impeller blank obtained by (4-1) and step (2) shrouding disc and welding rod are hung in dedicated heat treatment by (4-2)
It in technique furnace, is warming up to 200 DEG C and continues to hang out welding after keeping the temperature 2h, until impeller blank is welded into slightly with shrouding disc by welding rod group
Then impeller is hung in dedicated heat treatment process furnace and carries out welding stress-removal processing to get impeller by the impeller of processing.
Wherein, welding stress-removal handles specific steps are as follows: by the workpiece after welding, i.e. impeller blank and impeller is warming up to
500-700 DEG C of heat preservation 7h, then air is cooling.
Embodiment 2
Instrument: 1. dedicated heat treatment process furnace is a set of.2. high temperature power control cabinet is a set of (alarm of semi-automatic-controlled band).3. high temperature is preapred for an unfavorable turn of events
Type tire.4. special welding rack.5. thermometric primary instrument is several.
Blade uses precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb；Wheel disc and shrouding disc are all made of steel alloy
15MnNiCrMo2V。
The present invention provides a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, including following
Step:
(1) by steel alloy 15MnNiCrMo2V by calcining post-processing into wheel cap and shrouding disc；Not by raw material precipitation-hardening
Rust steel 0Cr14Ni6Mo2Cu2Nb is reprocessed into blade after carrying out forging heat treatment；Wherein forging heat treatment specifically: will precipitate
After hardening stainless steel 0Cr14Ni6Mo2Cu2Nb forging, after 850 DEG C of heat preservations adjust 1h, 1050 DEG C of solution treatment 2-5h, then
Air is cooling after 640 DEG C of Wetted constructures 5-6h.
(2) it after fixing (1) resulting wheel disc or shrouding disc and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace,
Dedicated heat treatment process furnace is automatically performed solid solution and Wetted constructures；
(3) it after fixing blade obtained by (1) and high temperature deform-proof tire, hangs in dedicated heat treatment process furnace, at dedicated heat
Science and engineering skill furnace keeps the temperature 1h after blade is warming up to 850 DEG C automatically, then proceedes to be warming up to 1050 DEG C of progress solution treatment 2-5h, so
Air is cooling afterwards；Wherein lead to argon gas protection when solution treatment；Blade after solution treatment is warming up to air after 640 DEG C of heat preservation 5h
It is cooling.
(4) by step (2) treated wheel disc and shrouding disc, treated that blade carries out welding with step (3) respectively, specifically
Steps are as follows:
During (4-1) welding, step (2) treated wheel disc, step (3) treated blade and welding rod are hung in
It in dedicated heat treatment process furnace, is warming up to 200 DEG C and continues to hang out welding after keeping the temperature 3h, until wheel disc and blade pass through welding rod group
It is welded into impeller blank to be processed, then hangs in dedicated heat treatment process furnace and carries out welding stress-removal processing；
Treated impeller blank obtained by (4-1) and step (2) shrouding disc and welding rod are hung in dedicated heat treatment by (4-2)
It in technique furnace, is warming up to 200 DEG C and continues to hang out welding after keeping the temperature 3h, until impeller blank is welded into slightly with shrouding disc by welding rod group
Then impeller is hung in dedicated heat treatment process furnace and carries out welding stress-removal processing to get impeller by the impeller of processing.
In the present embodiment, precipitation-hardening stainless steel blade (0Cr14Ni6Mo2Cu2Nb) and steel alloy (15MnNiCrMo2V)
Its material difference is larger.One is stainless steels, and one is steel alloys, and welding stress is different, weldment easily modification or cracking.Step
The selection of welding rod meets the following conditions in (4-1) and step (4-2): alloying element includes Cr, Ni and Mo；Elongation percentage be 20~
25%；Tensile strength is 800~850MPa；Hardness is HB90~96.Precipitation-hardening stainless steel blade
(0Cr14Ni6Mo2Cu2Nb) and steel alloy (15MnNiCrMo2V) contains alloying elements cr, Ni and Mo, alloy member in welding rod
Element includes Cr, Ni and Mo, and convenient for the compatible welding rod of metallographic structure of stainless steel and steel alloy, and tensile strength is 800~850MPa,
With stainless steel, steel alloy strength matching.
Chinese shipbuilding industry Wuhan material and structural test inspection center are raw to heat treatment process provided by the present embodiment
The impeller of production carries out the stretching experiment of verifying wheel disc or shrouding disc and blade weld: yield strength Rp0.2 (N/mm2)=863；
Tensile strength Rm (N/mm2)=958；Test data proves commissure strength of parent δ b >=800MPa.
Application Example:
The using effect case of the impeller of heat treatment process production provided by the invention:
I) before Wuhan Iron and Steel Plant one is made steel 2005, two once dust collection of converter blowers need to scrap two sets of rotors every year, from 2005
After our precipitation-hardening stainless steel impellers, until still being run at the beginning of 2019 intact.The 14 years in-service time of this impeller, before comparing
A set of rotor, which is used only ten months, just to be scrapped, and is improved service life up to as many as 14 times.
Ii) average every Fans operation just needs for 10~15 days or so before Chengdu-Chongqing Fan Tai Science and Technology Ltd. steel mill 2016
It shuts down clear impeller or does dynamic balancing, after the stainless steel blade rotor for using us to be transformed from after 2016, the on-line operation time reaches
11 months, improve 12 times of runing time.
Iii) Tianjin iron company, Xiangtan Iron and Steel, more than 40 steel mills such as Dadong River iron company are using
After our this patented product, the service life of impeller, on-line operation time and to save human resources etc. all many-sided
Great raising is arrived.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (9)
1. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller, which is characterized in that including following
Step:
(1) it after fixing wheel disc or shrouding disc and high temperature deform-proof tire to be welded, hangs in dedicated heat treatment process furnace, dedicated heat
Treatment process furnace is automatically performed solid solution and Wetted constructures；
(2) it after fixing blade and high temperature deform-proof tire to be welded, hangs in dedicated heat treatment process furnace, dedicated heat treatment work
Skill furnace is automatically performed solid solution and Wetted constructures；
(3) by step (1) treated wheel disc and shrouding disc, treated that blade carries out welding, specific steps with step (2) respectively
It is as follows:
During (3-1) welding, step (1) treated wheel disc, step (2) treated blade and welding rod are hung in dedicated
It in heat treatment process furnace, is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until wheel disc and blade pass through welding rod
Group is welded into impeller blank to be processed, then hangs in dedicated heat treatment process furnace and carries out welding stress-removal processing；
Treated impeller blank obtained by (3-1) and step (1) shrouding disc and welding rod are hung in dedicated heat treatment process by (3-2)
It in furnace, is warming up to 150-200 DEG C and continues to hang out welding after keeping the temperature 2-3h, until impeller blank is welded into shrouding disc by welding rod group
Then impeller is hung in dedicated heat treatment process furnace and carries out welding stress-removal processing to get impeller by rough machined impeller.
2. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, the impeller includes wheel disc (1), shrouding disc (2) and multiple blades (3), the blade (3) includes linear leaf
(3-1) and short blade (3-2), impeller is using the long and short blade shape of the double-deck slit type, by blade (3) and wheel disc (1), shrouding disc (2)
Composition is respectively welded, and the linear leaf (3-1) on the impeller and short blade (3-2) staggeredly arrange in concentric circles.
3. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, wheel disc or shrouding disc solution treatment in step (1) specifically: 1h is kept the temperature after wheel disc or shrouding disc are warming up to 850 DEG C,
It then proceedes to be warming up to 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein lead to argon gas when solution treatment to protect
Shield；
Wheel disc or shrouding disc Wetted constructures in step (1) specifically: by after solution treatment wheel disc or shrouding disc be warming up to 500-700
Air is cooling after DEG C heat preservation 5-6h.
4. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, blade solution treatment in step (2) specifically: keep the temperature 1h after blade is warming up to 850 DEG C, then proceed to heat up
To 1000-1100 DEG C of progress solution treatment 2-5h, then air is cooling；Wherein lead to argon gas protection when solution treatment；
Blade Wetted constructures in step (2) specifically: the blade after solution treatment is warming up to after 500-700 DEG C of heat preservation 5h empty
Air cooling.
5. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, the welding stress-removal in step (3-1) and step (3-2) handles specific steps are as follows: by the workpiece after welding, i.e.,
Impeller blank and impeller are warming up to 500-700 DEG C of heat preservation 7h, and then air is cooling.
6. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, blade uses precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb；Wheel disc and shrouding disc are all made of steel alloy
15MnNiCrMo2V。
7. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, blade, wheel disc and shrouding disc are all made of precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb.
8. a kind of heat treatment of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 6 or 7 produces work
Skill, which is characterized in that precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb carries out forging heat treatment before being processed into workpiece, tool
After precipitation-hardening stainless steel 0Cr14Ni6Mo2Cu2Nb is is forged by body, after 850 DEG C of heat preservations adjust 1h, 1050 DEG C of solution treatment
2-5h, then air is cooling after 640 DEG C of Wetted constructures 5-6h.
9. a kind of thermal treatment production process of high anticorrosion antiwear once dust collection of converter draught fan impeller according to claim 1,
It is characterized in that, the selection of welding rod meets the following conditions in step (3-1) and step (3-2): alloying element include Cr, Ni and
Mo；Elongation percentage is 20~25%；Tensile strength is 800~850MPa；Hardness is HB 90~96.
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