CN106636860B - A kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting - Google Patents
A kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting Download PDFInfo
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- CN106636860B CN106636860B CN201611097142.XA CN201611097142A CN106636860B CN 106636860 B CN106636860 B CN 106636860B CN 201611097142 A CN201611097142 A CN 201611097142A CN 106636860 B CN106636860 B CN 106636860B
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
-
- 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
Abstract
The present invention relates to propeller casting technology field, a kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting, this method comprises the following steps：S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state；S2：Additive is melted in melting furnace；S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added in vaccum sensitive stove using convection type；S4：Make the mould of propeller blade and its component；S5：Casting propeller blade in S4 steps and its component are taken out；S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating；S7：Repeat S6 steps 24 times, this method has more preferable function compared to traditional mode, can effectively improve application of the nitrogen austenitic stainless steel on ships, and wearability, mechanical performance, corrosion resistance have raising largely.
Description
Technical field
The present invention relates to propeller casting technology field, one kind manufacture high-nitrogen austenitic stainless steel ships propeller casting
Method.
Background technology
With the continuous progressive and development of society, water transportation and tourism have become a kind of important in modern society deposit
In mode, while have to use is propeller casting, and power is provided by propeller and its component.High-nitrogen austenitic is not
Steel become rusty as a kind of more well known new material, there is very strong toughness, wearability and fatigue resistance, be widely used in
In the big and special working environment of various working strengths, what is be in close contact the most with water on ships is propeller, and propeller exists
Non- ships provides the power to advance during rotation.
Ships under prior art is mostly common stainless steel, by stainless steel surfaces rust prevention by applying liquid material lose layer come
Have the function that flow impact prevention, corrosion-resistant and impact resistance, but the shortcomings that serious be present in this traditional mode, in state
It is interior, high-nitrogen austenitic stainless steel can be carried out reasonably casting and handling the mesh come for ships service without the technology of maturation
, and the high-nitrogen austenitic stainless steel under prior art, because nitrogen can spray cast member, can make casting during casting
There is small hole in forging piece internal structure, largely reduces the overall structure stability of cast member, applies on ships
When, its durability extreme difference.
The content of the invention
It is an object of the invention to provide it is a kind of manufacture high-nitrogen austenitic stainless steel ships propeller casting method, with
Solve the problems, such as to propose in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：One kind manufacture high-nitrogen austenitic stainless steel ships is used
The method of propeller casting, this method comprise the following steps：
S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state, chooses high nitrogen
Alloy is as additive, from nitrogen as protective gas；
S2：Additive is melted in melting furnace, and sequentially adds micro Cr, Mn, V thereto, and is stirred by electromagnetism
Mix, be filled with nitrogen, stir speed (S.S.) 60r/min simultaneously thereto, mixing time is controlled in 2-6min；
S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added to vaccum sensitive stove using convection type
In, the flowing velocity of basic molten steel is arranged between 1-1.5m/s, and the flowing velocity of additive alloy liquid is arranged on 2-3m/s
Between, the temperature of vaccum sensitive stove is set between 1350-1600 DEG C, carries out high temperature refinery 15-35min, what convection type added
During, keep nitrogen to be filled with constantly, shaping molten steel is made；
S4：The mould of propeller blade and its component is made, sets 0.5MPa workpiece to cast environment, and in this working environment
The middle process for realizing casting, the whole process of casting is controlled within 60-85s, and pours vocal mimicry using integrated hot runner hot
Art, during casting, using ul-trasonic irradiation on casting die and simultaneously micro- mould that shakes；
S5：Casting propeller blade in S4 steps and its component are taken out, propeller blade and its component are heat-treated；
S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating, and are quickly placed to
In coolant, and propeller blade and its component aerial residence time are no more than 2s, are stood after 3-5s is stopped in coolant
Take out；
S7：Repeat S6 steps 2-4 times, and the propeller blade after processing and its component are placed in oscillation device, mutually
Propeller blade and its component between do not contact, and vibrate for up and down vibration, remove surface condense impurity, use high pressure gas blowout
Rifle is purged to propeller blade and its component, and the propeller blade after processing and its component are placed into the environment of S4 steps
In, and nitrogen is full of in the environment, while anti-corrosion layer, high-nitrogen austenitic stainless steel are smeared on propeller blade and its component
Ships is completed with propeller casting.
Preferably, the content of Cr, Mn, V in additive alloy liquid is no more than 3% in the S2 steps.
Preferably, additive alloy liquid flow direction is in along horizontal vertical line with basic molten steel flow direction in the S3 steps
It is symmetrical arranged
Preferably, the coolant is made up of alcohol, dry ice, and real-time nitrogen is passed through in coolant, and dry ice timing is added,
Coolant temperature is kept at subzero less than 15 DEG C.
Preferably, mould is micro- in the S4 steps shakes for side-to-side vibrations, vibration frequency be 1 second once, Oscillation Amplitude exists
Between 0.1mm to 1mm.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention's is more scientific and reasonable, in the addition of setting
, can be effectively stable in basic molten steel by nitrogen during agent and the protection of nitrogen, and then reduce molten steel and casting
Emission during shaping, the overall structure stability and integrality of cast member are greatly enhanced, compared to tradition
Casting method, there is stronger stability, and cast member table can largely be reduced by casting process repeatedly
The impurity content in face, greatly enhances the wearability of cast member and the spraying coating quality of coating, this method are compared
Traditional mode has more preferable function, can effectively improve application of the high-nitrogen austenitic stainless steel on ships, and resistance to
Mill property, mechanical performance, corrosion resistance have raising largely.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Embodiment one
The present invention provides a kind of technical scheme：A kind of side for manufacturing high-nitrogen austenitic stainless steel ships propeller casting
Method, this method comprise the following steps：
S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state, chooses high nitrogen
Alloy is as additive, from nitrogen as protective gas；
S2：Additive is melted in melting furnace, and sequentially adds micro Cr, Mn, V thereto, and is stirred by electromagnetism
Mix, be filled with nitrogen, stir speed (S.S.) 60r/min simultaneously thereto, mixing time is controlled in 2min；
S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added to vaccum sensitive stove using convection type
In, the flowing velocity of basic molten steel is arranged on 1m/s, and the flowing velocity of additive alloy liquid is arranged on 2m/s, sets vacuum sense
The temperature of stove is answered between 1350 DEG C, carries out high temperature refinery 15min, during convection type adds, keeps nitrogen to be filled with constantly,
Shaping molten steel is made；
S4：The mould of propeller blade and its component is made, sets 0.5MPa workpiece to cast environment, and in this working environment
The middle process for realizing casting, the whole process control of casting are poured vocal imitation skill in 55s, and using integrated hot runner hot, poured
During casting, using ul-trasonic irradiation on casting die and simultaneously micro- mould that shakes；
S5：Casting propeller blade in S4 steps and its component are taken out, propeller blade and its component are heat-treated；
S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating, and are quickly placed to
In coolant, and propeller blade and its aerial residence time 1.5s of component, taken out immediately after stopping 3s in coolant；
S7：S6 steps 2 time are repeated, and the propeller blade after processing and its component are placed in oscillation device, mutual
Do not contacted between propeller blade and its component, and vibrate and condense impurity for vibration up and down, removal surface, use high pressure gas spray gun
Propeller blade and its component are purged, and the propeller blade after processing and its component are placed into the environment of S4 steps,
And nitrogen is full of in the environment, while anti-corrosion layer, high-nitrogen austenitic stainless steel ship are smeared on propeller blade and its component
Warship is completed with propeller casting.
Wherein：The content of Cr, Mn, V in additive alloy liquid is 1% in the S2 steps., add in the S3 steps
Agent aluminium alloy flow direction is added to be symmetrical set with basic molten steel flow direction along horizontal vertical line, the coolant is by alcohol, dry
Ice is formed, and real-time nitrogen is passed through in coolant, and dry ice timing is added, and keeps coolant temperature at subzero 15 DEG C, the S4 steps
Mould is micro- in rapid shakes for side-to-side vibrations, vibration frequency be 1 second once, Oscillation Amplitude is in 0.3mm.
Embodiment two
The present invention provides a kind of technical scheme：A kind of side for manufacturing high-nitrogen austenitic stainless steel ships propeller casting
Method, this method comprise the following steps：
S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state, chooses high nitrogen
Alloy is as additive, from nitrogen as protective gas；
S2：Additive is melted in melting furnace, and sequentially adds micro Cr, Mn, V thereto, and is stirred by electromagnetism
Mix, be filled with nitrogen, stir speed (S.S.) 60r/min simultaneously thereto, mixing time is controlled in 4min；
S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added to vaccum sensitive stove using convection type
In, the flowing velocity of basic molten steel is arranged on 1.3m/s, and the flowing velocity of additive alloy liquid is arranged on 2.6m/s, and setting is true
The temperature of empty induction furnace carries out high temperature refinery 30min between 1500 DEG C, during convection type adds, keeps nitrogen to be filled with
Constantly, shaping molten steel is made；
S4：The mould of propeller blade and its component is made, sets 0.5MPa workpiece to cast environment, and in this working environment
The middle process for realizing casting, the whole process control of casting are poured vocal imitation skill in 80s, and using integrated hot runner hot, poured
During casting, using ul-trasonic irradiation on casting die and simultaneously micro- mould that shakes；
S5：Casting propeller blade in S4 steps and its component are taken out, propeller blade and its component are heat-treated；
S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating, and are quickly placed to
In coolant, and propeller blade and its aerial residence time 1.8s of component, taken out immediately after stopping 4s in coolant；
S7：S6 steps 3 time are repeated, and the propeller blade after processing and its component are placed in oscillation device, mutual
Do not contacted between propeller blade and its component, and vibrate and condense impurity for vibration up and down, removal surface, use high pressure gas spray gun
Propeller blade and its component are purged, and the propeller blade after processing and its component are placed into the environment of S4 steps,
And nitrogen is full of in the environment, while anti-corrosion layer, high-nitrogen austenitic stainless steel ship are smeared on propeller blade and its component
Warship is completed with propeller casting.
Wherein：The content of Cr, Mn, V in additive alloy liquid is 1.5% in the S2 steps., in the S3 steps
Additive alloy liquid flow direction is symmetrical set with basic molten steel flow direction along horizontal vertical line, the coolant by alcohol,
Dry ice is formed, and real-time nitrogen is passed through in coolant, and dry ice timing is added, and keeps coolant temperature at subzero 16 DEG C, the S4
Mould is micro- in step shakes for side-to-side vibrations, vibration frequency be 1 second once, Oscillation Amplitude is in 0.4mm.
Embodiment three
The present invention provides a kind of technical scheme：A kind of side for manufacturing high-nitrogen austenitic stainless steel ships propeller casting
Method, this method comprise the following steps：
S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state, chooses high nitrogen
Alloy is as additive, from nitrogen as protective gas；
S2：Additive is melted in melting furnace, and sequentially adds micro Cr, Mn, V thereto, and is stirred by electromagnetism
Mix, be filled with nitrogen, stir speed (S.S.) 60r/min simultaneously thereto, mixing time is controlled in 6min；
S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added to vaccum sensitive stove using convection type
In, the flowing velocity of basic molten steel is arranged on 1.5m/s, and the flowing velocity of additive alloy liquid is arranged on 3m/s, sets vacuum
The temperature of induction furnace carries out high temperature refinery 35min between 1600 DEG C, during convection type adds, keeps nitrogen to be filled with not
It is disconnected, shaping molten steel is made；
S4：The mould of propeller blade and its component is made, sets 0.5MPa workpiece to cast environment, and in this working environment
The middle process for realizing casting, the whole process control of casting are poured vocal imitation skill in 85s, and using integrated hot runner hot, poured
During casting, using ul-trasonic irradiation on casting die and simultaneously micro- mould that shakes；
S5：Casting propeller blade in S4 steps and its component are taken out, propeller blade and its component are heat-treated；
S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating, and are quickly placed to
In coolant, and propeller blade and its aerial residence time 2s of component, taken out immediately after stopping 5s in coolant；
S7：S6 steps 4 time are repeated, and the propeller blade after processing and its component are placed in oscillation device, mutual
Do not contacted between propeller blade and its component, and vibrate and condense impurity for vibration up and down, removal surface, use high pressure gas spray gun
Propeller blade and its component are purged, and the propeller blade after processing and its component are placed into the environment of S4 steps,
And nitrogen is full of in the environment, while anti-corrosion layer, high-nitrogen austenitic stainless steel ship are smeared on propeller blade and its component
Warship is completed with propeller casting.
Wherein：The content of Cr, Mn, V in additive alloy liquid is 2% in the S2 steps., add in the S3 steps
Agent aluminium alloy flow direction is added to be symmetrical set with basic molten steel flow direction along horizontal vertical line, the coolant is by alcohol, dry
Ice is formed, and real-time nitrogen is passed through in coolant, and dry ice timing is added, and keeps coolant temperature at subzero 17 DEG C, the S4 steps
Mould is micro- in rapid shakes for side-to-side vibrations, vibration frequency be 1 second once, Oscillation Amplitude is in 0.5mm.
Propeller and its component corresponding to three groups of embodiments are made respectively, set high pressure water flow strikes to test, pass through reality
Now examine the performance of high-nitrogen austenitic stainless steel.
Three groups of contrast experiments are set, and three groups of contrast experiments are carried out jointly, outside environmental elements are identical, with commonly not
Become rusty based on steel propeller, obtain four experimental datas, it is as shown in the table：
| Group | Corrosion degree | Rotate abrasion | Impact wear |
| Embodiment one | 80 | 70 | 90 |
| Embodiment two | 75 | 70 | 80 |
| Embodiment three | 85 | 80 | 90 |
The data based on common stainless steel propellor, stainless steel propellor corrosion degree is set as 100, rotate mill
Damage degree is 100, and impact wear degree is 100.
From experimental data, three groups of embodiments all have preferable corrosion resistant, resistance to compared to traditional stainless steel propellor
The effect of abrasion, the wherein effect of embodiment two are best.
By adding micro Cr, Mn, V, the nitrogen that can largely improve in propeller and its casting is stable
Property, and propeller overall function can largely be improved by rational structure setting, high-nitrogen austenitic can be made
Stainless steel is widely used on ships.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. it is a kind of manufacture high-nitrogen austenitic stainless steel ships propeller casting method, it is characterised in that this method include with
Lower step：
S1：Selection refines molten steel raw material based on the molten steel for treating that austenitic stainless steel is produced under casting state, chooses high nitrogen alloy
As additive, from nitrogen as protective gas；
S2：Additive is melted in melting furnace, and sequentially adds micro Cr, Mn, V thereto, and by electromagnetic agitation, to
Nitrogen, stir speed (S.S.) 60r/min are wherein filled with simultaneously, and mixing time is controlled in 2-6min；
S3：Obtained additive alloy liquid in S2 steps and basic molten steel are added in vaccum sensitive stove using convection type, base
The flowing velocity of plinth molten steel is arranged between 1-1.5m/s, and the flowing velocity of additive alloy liquid is arranged between 2-3m/s,
The temperature of vaccum sensitive stove is set between 1350-1600 DEG C, carries out high temperature refinery 15-35min, the process that convection type adds
In, keep nitrogen to be filled with constantly, shaping molten steel is made；
S4：The mould of propeller blade and its component is made, sets 0.5MPa workpiece to cast environment, and it is real in this working environment
The process of cast-in-place casting, the whole process of casting is controlled within 60-85s, and pours vocal imitation skill using integrated hot runner hot,
During casting, using ul-trasonic irradiation on casting die and simultaneously micro- mould that shakes；
S5：Casting propeller blade in S4 steps and its component are taken out, propeller blade and its component are heat-treated；
S6：Propeller blade after being heat-treated in S5 steps and its assembly surface are subjected to flame heating, and are quickly placed to cool down
In liquid, and propeller blade and its component aerial residence time are no more than 2s, are taken immediately after stopping 3-5s in coolant
Go out；
S7：Repeat S6 steps 2-4 times, and the propeller blade after processing and its component are placed in oscillation device, mutual spiral shell
Do not contact, and vibrated to vibrate up and down between rotation blade and its component, remove surface and condense impurity, use high pressure gas spray gun pair
Propeller blade and its component are purged, and the propeller blade after processing and its component are placed into the environment of S4 steps, and
Nitrogen is full of in the environment, while anti-corrosion layer, high-nitrogen austenitic stainless steel ships are smeared on propeller blade and its component
Completed with propeller casting.
2. a kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting according to claim 1, it is special
Sign is：The content of Cr, Mn, V in additive alloy liquid is no more than 3% in the S2 steps.
3. a kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting according to claim 1, it is special
Sign is：Additive alloy liquid flow direction is in symmetrically to set along horizontal vertical line with basic molten steel flow direction in the S3 steps
Put.
4. a kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting according to claim 1, it is special
Sign is：The coolant is made up of alcohol, dry ice, and real-time nitrogen is passed through in coolant, and dry ice timing is added, and keeps cooling
Liquid temperature degree is at subzero less than 15 DEG C.
5. a kind of method for manufacturing high-nitrogen austenitic stainless steel ships propeller casting according to claim 1, it is special
Sign is：Mould is micro- in the S4 steps shakes for side-to-side vibrations, vibration frequency be 1 second once, Oscillation Amplitude is in 0.1mm to 1mm
Between.
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| WO2018103087A1 (en) * | 2016-12-09 | 2018-06-14 | 孙瑞涛 | Method for manufacturing high-nitrogen austenitic stainless steel propeller casting for ship |
| CN108202128B (en) * | 2018-01-11 | 2020-05-15 | 芜湖市金贸流体科技股份有限公司 | Integral casting-in method for sealing ring of valve body of hard sealing gate valve |
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| JPS5344427A (en) * | 1976-10-05 | 1978-04-21 | Kubota Ltd | Method to manufacture propellers by using extinguishable pattern |
| CN102009283B (en) * | 2010-06-30 | 2012-12-12 | 江苏锋泰钻石工具制造有限公司 | Cavitation corrosion resistant stainless steel solder wire and welding method thereof |
| CN102166620B (en) * | 2010-11-30 | 2013-02-20 | 大连华锐重工集团股份有限公司 | Molding method of copper alloy propeller resin sand |
| CN103878314B (en) * | 2014-03-27 | 2016-05-04 | 舟山市定海区龙叶螺旋桨制造有限公司 | Screw pouring technology |
| CN105195681A (en) * | 2015-08-31 | 2015-12-30 | 苏州金业船用机械厂 | Large ship propeller casting technology |
| CN105562644A (en) * | 2015-12-18 | 2016-05-11 | 吉林常春高氮合金研发中心有限公司 | Method for manufacturing propeller casting for high nitrogen austenite stainless steel vessel |
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Address after: 266300 South Head of Huiying Street, Jiaozhou Economic and Technological Development Zone, Qingdao City, Shandong Province Patentee after: China National Academy of Machinery Group Qingdao Branch Co.,Ltd. Address before: 266300 South Head of Huiying Street, Jiaozhou Economic and Technological Development Zone, Qingdao City, Shandong Province Patentee before: Qingdao Branch Co., Ltd. of Mechanical Science Research Institute |