CN105331872A - Intelligent preparation method for novel non-magnetic stainless steel - Google Patents
Intelligent preparation method for novel non-magnetic stainless steel Download PDFInfo
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- CN105331872A CN105331872A CN201510768570.XA CN201510768570A CN105331872A CN 105331872 A CN105331872 A CN 105331872A CN 201510768570 A CN201510768570 A CN 201510768570A CN 105331872 A CN105331872 A CN 105331872A
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Abstract
The invention discloses an intelligent preparation method for novel non-magnetic stainless steel. A temperature detecting module is used for detecting the temperature value of a molten pool, a heat treatment furnace and a tempering furnace. A carbon content detecting module is used for detecting the carbon content value in the molten pool. A programmable logic controller (PLC) is used for controlling a heating module, a decarbonization module, a reduction module and a prompting module to implement relative operation according to the temperature value of the molten pool, the heat treatment furnace and the tempering furnace, the carbon content value in the molten pool and a preparation process of the non-magnetic stainless steel. By means of the intelligent preparation method, various parameters such as the temperature, the time and the input quantity of materials can be strictly controlled in the preparation process, the error rate is decreased, the preparation efficiency and the quality of the novel non-magnetic stainless steel are improved, the workload of operators is greatly reduced, and the high-degree automation of the preparation process is achieved.
Description
Technical field
The present invention relates to control field, especially a kind of intelligent preparation method of novel magnetism-free stainless steel.
Background technology
At present, in domestic industry, widely used nonmagnetic steel is 18-8 type Austenitic stainless steel, and the smelting of nonmagnetic steel and processing technology are very ripe at home.But, along with the performance requriements of people to material is more and more higher, this material in use intensity and wear resistance more and more can not meet the requirement of people, particularly work under ocean environment, its erosion resistance and wear resistance are significantly not enough, not only affect visual appearance, affect the work-ing life of this material greatly simultaneously, cause corresponding cost to increase, security incident is easily sent out.
And at present, the preparation process of nonmagnetic steel depends on Artificial Control, the dosage etc. of putting into of all temps, time and material is by manually going operation, but these data need strictly control, if there is any discrepancy, just probably cause the quality problem preparing nonmagnetic steel; And in preparation process various need metering data various, artificial memory and operation are easy to make mistakes, and due to manual operation more consuming time, under various reasons, make preparation efficiency not high.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, a kind of intelligent preparation method of novel magnetism-free stainless steel is provided, can strictly control each temperature in preparation process, time and material put into the parameters such as dosage, reduce error rate, improve the quality of preparation efficiency and novel magnetism-free stainless steel, also greatly reduce the work of operator, achieve the increasingly automated of preparation process.
The technical solution used in the present invention is as follows:
An intelligent preparation method for the intelligent preparation system of novel magnetism-free stainless steel, it comprises the following steps:
Step 1: raw material iron is put into converter heat fused, after raw material iron all melts, regulate bath temperature, temperature detecting module detects temperature value in molten bath, and is converted into digital signaling zero 01 and is passed to PLC; Described PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1550 DEG C, transmit executive signal 201 to decarburization module, described decarburization module receives executive signal 201, adds the decarburizer of predetermined dose 01, the sweetening agent of predetermined dose 02 and the reductor of predetermined dose 03 in molten bath successively; Decarburization, desulfurization, deoxidation are carried out to the molten iron in molten bath;
Step 2: after decarburization, desulfurization, deoxidation step complete, after first time triggering heating module (well heater in molten bath), heated molten bath, meanwhile, PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1600 DEG C, transmit executive signal 301 to heating module, described heating module receives executive signal 301, is adjusted to holding mode, continue insulation 5min, complete backward PLC transmitting digital signals 302; PLC receives numerary signal 302, transmits executive signal 202 to decarburization module; Decarburization module receives executive signal 202, the high carbon ferro-chrome of predetermined dose 04 is added successively in molten bath, the ferromanganese of predetermined dose 05 and the nickel shot of predetermined dose 06, the chromium content in molten bath, Fe content, nickel content is made to reach pre-provisioning request, complete backward PLC transmitting digital signals 203, PLC receives numerary signal 203, transmits executive signal 303 to heating module; Described heating module receives executive signal 303, continues the temperature 5min of maintenance 1600 DEG C, completes backward PLC transmitting digital signals 304;
Step 3:PLC receives numerary signal 304, executive signal 401 is transmitted to reminding module, described reminding module receives numerary signal 401, start warning horn, send prompt tone, remind staff to add raw material molybdenum-iron, vanadium iron, ferrotianium and ferro-niobium, and continue to add decarburizer and carry out decarburization, until iron melts completely; Second time triggers heating module (well heater in molten bath), heated molten bath, and PLC continues to receive digital signaling zero 01 simultaneously, when temperature value in molten bath reaches 1700 DEG C, transmits executive signal 402 to reminding module, transmits executive signal 305 simultaneously to heating module; Described reminding module receives executive signal 402, starts warning horn, sends prompt tone, reminds staff to trigger decarburization module; Heating module receives to executive signal 305, continues insulation 5min, completes backward PLC transmitting digital signals 306; PLC receives numerary signal 306, transmits executive signal 204 to decarburization module; Decarburization module receives executive signal 204, the reductor of the dehydrogenating agent of predetermined dose 07, the denitrfying agent of predetermined dose 08, the decarburizer of predetermined dose 09, the sweetening agent of predetermined dose 10 and predetermined dose 11 is added successively in molten bath, now alloy composition is finely tuned, make it to reach predetermined component requirements, after completing, to PLC transmitting digital signals 205; PLC receives numerary signal 205, transmits executive signal 206 to decarburization module; Described decarburization module receives executive signal 206, continues to add decarburizer in molten bath, continues decarburization, controls the content of carbon, until when receiving executive signal 207, stops adding;
Step 4: carbon content detection module detects the carbon content values in molten bath, and be converted into numerary signal 101 and be passed to PLC; PLC receives numerary signal 101, when carbon content is less than or equal to 0.18%, transmits executive signal 207 to decarburization module, meanwhile, transmits executive signal 501 to recovery module; Described decarburization module receives executive signal 207, stops adding decarburizer; Described recovery module receives executive signal 501, adds the ferrosilicon of predetermined dose 12 and the aluminium of predetermined dose 13 in molten bath, and the chromium metal in reduction molten bath, controls the content of Silicified breccias, make it to reach predetermined component requirements;
Step 5: vacuum heat-preserving 9min; The rare earth of specified amount is added in the most backward ladle;
Step 6: melted novel magnetism-free stainless steel is carried out solution treatment, heat treatment furnace is put into by novel magnetism-free stainless steel, third time triggers heating module (well heater in heat treatment furnace), heating heat treatment furnace, temperature detecting module detects the temperature value in heat treatment furnace, and is converted into digital signaling zero 02 and is passed to PLC; Described PLC receives digital signaling zero 02, when temperature value in heat treatment furnace is more than or equal to 1000 DEG C, executive signal 403 is transmitted to reminding module, transmit executive signal 307 to heating module simultaneously, described reminding module receives executive signal 403, start warning horn, send prompt tone, remind staff to trigger heating module (well heater in heat treatment furnace); Heating module receives executive signal 307, is adjusted to holding mode, stops heating after continuing insulation 5.5h; , then shrend is to room temperature;
Step 7: after novel magnetism-free stainless steel solution treatment terminates, carry out stabilization treatment, namely heating module (well heater in heat treatment furnace) is triggered the 4th time, heating heat treatment furnace, PLC continues to receive digital signaling zero 02, when temperature value second time reaches 850 DEG C in heat treatment furnace, transmit executive signal 308 to heating module; Heating module receives executive signal 308, is adjusted to holding mode, stops heating after continuing insulation 4.5h; Then sky is cooled to room temperature;
Step 8: this novel magnetism-free stainless steel also needs to carry out destressing process after cold working or welding, namely heating module (well heater in tempering stove) is triggered the 5th time, heated draw furnace, temperature detecting module detects the temperature value in tempering stove, and is converted into digital signaling zero 03 and is passed to PLC; Described PLC receives digital signaling zero 03, when temperature value is more than or equal to 600 DEG C, transmits executive signal 309 to heating module; Described heating module receives executive signal 309, is adjusted to holding mode, stops heating after continuing insulation 1.5h; Be heated to 600 DEG C ~ 650 DEG C tempering by the novel magnetism-free stainless steel after cold working or welding, temperature rise rate is 80 DEG C/h, and insulation 1 ~ 2h, then furnace cooling is to room temperature.
The system of the intelligent preparation method of this kind of novel magnetism-free stainless steel, it is characterized in that, it comprises: temperature detecting module, carbon content detection module, heating module, decarburization module, reminding module, recovery module and PLC;
Described temperature detecting module comprises the temperature monitor being located at molten bath, heat treatment furnace and tempering stove, for detecting the temperature value in molten bath, and is converted into digital signaling zero 01 and is passed to PLC; Detect the temperature value in heat treatment furnace, and be converted into digital signaling zero 02 and be passed to PLC; Detect the temperature value in tempering stove, and be converted into digital signaling zero 03 and be passed to PLC; Carbon content detection module comprises the carbon content detector being located at molten bath, for detecting the carbon content values in molten bath, and is converted into numerary signal 101 and is passed to PLC;
PLC is connected with recovery module with temperature detecting module, carbon content detection module, heating module, reminding module, decarburization module respectively; For receiving digital signaling zero 01, when temperature value in molten bath reaches 1550 DEG C, transmit executive signal 201 to decarburization module, when temperature value in molten bath reaches 1600 DEG C, transmit executive signal 301 to heating module, receive numerary signal 302, transmit executive signal 202 to decarburization module; Receive numerary signal 203, transmit executive signal 303 to heating module; Receive numerary signal 304, transmit executive signal 401 to reminding module, continue to receive digital signaling zero 01, when temperature value in molten bath reaches 1700 DEG C, transmit executive signal 402 to reminding module, transmit executive signal 305 to heating module simultaneously; Receive numerary signal 306, transmit executive signal 204 to decarburization module; Receive numerary signal 205, transmit executive signal 206 to decarburization module; Receive numerary signal 101, when carbon content is less than or equal to 0.18%, transmit executive signal 207 to decarburization module, meanwhile, transmit executive signal 501 to recovery module; Receive digital signaling zero 02, when temperature value in heat treatment furnace is more than or equal to 1000 DEG C, transmit executive signal 403 to reminding module, transmit executive signal 307 to heating module simultaneously, when temperature value second time reaches 850 DEG C in heat treatment furnace, transmit executive signal 308 to heating module; Receive digital signaling zero 03, when temperature value is more than or equal to 600 DEG C, transmit executive signal 309 to heating module;
Decarburization module comprises decarbonization device (decarbonization device is higher than molten bath), receives executive signal 201, adds the decarburizer of predetermined dose 01, the sweetening agent of predetermined dose 02 and the reductor of predetermined dose 03 in molten bath successively; Receive executive signal 202, the high carbon ferro-chrome of predetermined dose 04 is added successively in molten bath, the ferromanganese of predetermined dose 05 and the nickel shot of predetermined dose 06, complete backward PLC transmitting digital signals 203, receive executive signal 204, the reductor of the dehydrogenating agent of predetermined dose 07, the denitrfying agent of predetermined dose 08, the decarburizer of predetermined dose 09, the sweetening agent of predetermined dose 10 and predetermined dose 11 is added successively, after completing, to PLC transmitting digital signals 205 in molten bath; Receive executive signal 206, in molten bath, add decarburizer, until when receiving executive signal 207, stop adding;
Heating module comprises the well heater being located at molten bath, heat treatment furnace and tempering stove, after first time is triggered (well heater in molten bath), and heated molten bath, until receive executive signal 301, be adjusted to holding mode, continue insulation 5min, complete backward PLC transmitting digital signals 302; Receive executive signal 303, continue insulation 5min, complete backward PLC transmitting digital signals 304; After second time is triggered (well heater in molten bath), heated molten bath, until receive to executive signal 305, continues insulation 5min, completes backward PLC transmitting digital signals 306; After third time is triggered (well heater in heat treatment furnace), heating heat treatment furnace, until receive executive signal 307, is adjusted to holding mode, stops heating after continuing insulation 5.5h; Be triggered for 4th time (well heater in heat treatment furnace), heating heat treatment furnace, until receive executive signal 308, is adjusted to holding mode, stops heating after continuing insulation 4.5h; Be triggered for 5th time (well heater in tempering stove), heated draw furnace, until receive executive signal 309, is adjusted to holding mode, stops heating after continuing insulation 1.5h;
Reminding module comprises warning horn, for receiving numerary signal 401, starting warning horn, sending prompt tone, reminds staff to add raw material molybdenum-iron, vanadium iron, ferrotianium and ferro-niobium, and continues to add decarburizer and carry out decarburization, until iron melts completely; Receive executive signal 402, start warning horn, send prompt tone, remind staff to trigger decarburization module; Receive executive signal 403, start warning horn, send prompt tone, remind staff to trigger heating module (well heater in heat treatment furnace);
Recovery module comprises reducing apparatus, for receiving executive signal 501, adds the ferrosilicon of predetermined dose 12 and the aluminium of predetermined dose 13 in molten bath, the chromium metal in reduction molten bath.
Further, described decarbonization device comprises casing, is provided with some interlayers in described casing, and casing is divided into 8 built-in boxes by described interlayer, is respectively used to deposit decarburizer, sweetening agent, reductor, high carbon ferro-chrome, ferromanganese, nickel shot, dehydrogenating agent and denitrfying agent; Each built-in box described is provided with conduit, and described conduit is provided with valve, and described valve is provided with volume metering instrument, for the material dosage of the First Astronautic Research Institute for Measurement and Test through valve.
Further, described reducing apparatus comprises casing, dividing plate is provided with in described casing, casing is divided into two built-in boxes by described dividing plate, be respectively used to hold ferrosilicon and aluminium, described built-in box is provided with conduit, and described conduit is provided with valve, described valve is provided with volume metering instrument, for the material dosage of the First Astronautic Research Institute for Measurement and Test through valve.
Further, when described third time triggers heating module, temperature rise rate is 100 DEG C/h; During described 4th triggering heating module, temperature rise rate is 90 DEG C/h.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
By the accurate control to system parameters, achieve automated operation, under the prerequisite that few operator and high safety are produced as far as possible, create maximum economic benefit.
By in molten bath, heat treatment furnace and tempering stove set temperature detector, detect in molten bath, temperature value in the interior and tempering stove of heat treatment furnace, to the detection of molten bath carbon content, intrasystem parameter really controlled; Add decarbonization device and reducing apparatus, decrease the workload of operator.
The control of streamline, makes the preparation of nonmagnetic steel more accurate; Reliability is high, practical;
Remind staff to carry out relating operation in due course, staff to follow up the process of whole preparation without the moment, saved resource; Reliability is high, practical, and real-time is excellent.
3, the unlatching of each valve is automatically regulated;
The valve of automatic adjustment decarbonization device and reducing apparatus, decreases the workload of operator, measures the material in conduit, thus realizes the strict control to the dosage of material, improves the preparation quality of preparation efficiency and nonmagnetic steel.
Accompanying drawing explanation
Fig. 1 is a kind of internal control figure of intelligent preparation system of novel magnetism-free stainless steel.
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification sheets (comprising any accessory claim, summary), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
As shown in Figure 1, a kind of intelligent preparation system of novel magnetism-free stainless steel, it comprises: temperature detecting module, carbon content detection module, heating module, decarburization module, reminding module, recovery module and PLC;
Described temperature detecting module comprises the temperature monitor being located at molten bath, heat treatment furnace and tempering stove, for detecting the temperature value in molten bath, and is converted into digital signaling zero 01 and is passed to PLC; Detect the temperature value in heat treatment furnace, and be converted into digital signaling zero 02 and be passed to PLC; Detect the temperature value in tempering stove, and be converted into digital signaling zero 03 and be passed to PLC; Carbon content detection module comprises the carbon content detector being located at molten bath, for detecting the carbon content values in molten bath, and is converted into numerary signal 101 and is passed to PLC;
PLC is connected with recovery module with temperature detecting module, carbon content detection module, heating module, decarburization module, reminding module respectively; For receiving digital signaling zero 01, when temperature value in molten bath reaches 1550 DEG C, transmit executive signal 201 to decarburization module, when temperature value in molten bath reaches 1600 DEG C, transmit executive signal 301 to heating module, receive numerary signal 302, transmit executive signal 202 to decarburization module; Receive numerary signal 203, transmit executive signal 303 to heating module; Receive numerary signal 304, transmit executive signal 401 to reminding module, continue to receive digital signaling zero 01, when temperature value in molten bath reaches 1700 DEG C, transmit executive signal 402 to reminding module, transmit executive signal 305 to heating module simultaneously; Receive numerary signal 306, transmit executive signal 204 to decarburization module; Receive numerary signal 205, transmit executive signal 206 to decarburization module; Receive numerary signal 101, when carbon content is less than or equal to 0.18%, transmit executive signal 207 to decarburization module, meanwhile, transmit executive signal 501 to recovery module; Receive digital signaling zero 02, when temperature value in heat treatment furnace is more than or equal to 1000 DEG C, transmit executive signal 403 to reminding module, transmit executive signal 307 to heating module simultaneously, when temperature value second time reaches 850 DEG C in heat treatment furnace, transmit executive signal 308 to heating module; Receive digital signaling zero 03, when temperature value is more than or equal to 600 DEG C, transmit executive signal 309 to heating module;
Decarburization module comprises decarbonization device (decarbonization device is higher than molten bath), receives executive signal 201, adds the decarburizer of predetermined dose 01, the sweetening agent of predetermined dose 02 and the reductor of predetermined dose 03 in molten bath successively; Receive executive signal 202, the high carbon ferro-chrome of predetermined dose 04 is added successively in molten bath, the ferromanganese of predetermined dose 05 and the nickel shot of predetermined dose 06, complete backward PLC transmitting digital signals 203, receive executive signal 204, the reductor of the dehydrogenating agent of predetermined dose 07, the denitrfying agent of predetermined dose 08, the decarburizer of predetermined dose 09, the sweetening agent of predetermined dose 10 and predetermined dose 11 is added successively, after completing, to PLC transmitting digital signals 205 in molten bath; Receive executive signal 206, in molten bath, add decarburizer, until when receiving executive signal 207, stop adding;
Heating module comprises the well heater being located at molten bath, heat treatment furnace and tempering stove, after first time is triggered (well heater in molten bath), and heated molten bath, until receive executive signal 301, be adjusted to holding mode, continue insulation 5min, complete backward PLC transmitting digital signals 302; Receive executive signal 303, continue insulation 5min, complete backward PLC transmitting digital signals 304; After second time is triggered (well heater in molten bath), heated molten bath, until receive to executive signal 305, continues insulation 5min, completes backward PLC transmitting digital signals 306; After third time is triggered (well heater in heat treatment furnace), heating heat treatment furnace, until receive executive signal 307, is adjusted to holding mode, stops heating after continuing insulation 5.5h; Be triggered for 4th time (well heater in heat treatment furnace), heating heat treatment furnace, until receive executive signal 308, is adjusted to holding mode, stops heating after continuing insulation 4.5h; Be triggered for 5th time (well heater in tempering stove), heated draw furnace, until receive executive signal 309, is adjusted to holding mode, stops heating after continuing insulation 1.5h;
Reminding module comprises warning horn, for receiving numerary signal 401, starting warning horn, sending prompt tone, reminds staff to add raw material molybdenum-iron, vanadium iron, ferrotianium and ferro-niobium, and continues to add decarburizer and carry out decarburization, until iron melts completely; Receive executive signal 402, start warning horn, send prompt tone, remind staff to trigger decarburization module; Receive executive signal 403, start warning horn, send prompt tone, remind staff to trigger heating module (well heater in heat treatment furnace);
Recovery module comprises reducing apparatus, for receiving executive signal 501, adds the ferrosilicon of predetermined dose 12 and the aluminium of predetermined dose 13 in molten bath, the chromium metal in reduction molten bath.
Described decarbonization device comprises casing, is provided with some interlayers in described casing, and casing is divided into 8 built-in boxes by described interlayer, is respectively used to deposit decarburizer, sweetening agent, reductor, high carbon ferro-chrome, ferromanganese, nickel shot, dehydrogenating agent and denitrfying agent; Each built-in box described is provided with conduit, and described conduit is provided with valve, and described valve is provided with volume metering instrument, for the material dosage of the First Astronautic Research Institute for Measurement and Test through valve.
Described reducing apparatus comprises casing, dividing plate is provided with in described casing, casing is divided into two built-in boxes by described dividing plate, be respectively used to hold ferrosilicon and aluminium, described built-in box is provided with conduit, described conduit is provided with valve, and described valve is provided with volume metering instrument, for the material dosage of the First Astronautic Research Institute for Measurement and Test through valve.
Described third time, when triggering heating module, temperature rise rate was 100 DEG C/h; During described 4th triggering heating module, temperature rise rate is 90 DEG C/h.
An intelligent preparation method for the intelligent preparation system of novel magnetism-free stainless steel, it comprises the following steps:
Step 1: raw material iron is put into converter heat fused, after raw material iron all melts, regulate bath temperature, temperature detecting module detects temperature value in molten bath, and is converted into digital signaling zero 01 and is passed to PLC; Described PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1550 DEG C, transmit executive signal 201 to decarburization module, described decarburization module receives executive signal 201, adds the decarburizer of predetermined dose 01, the sweetening agent of predetermined dose 02 and the reductor of predetermined dose 03 in molten bath successively; Decarburization, desulfurization, deoxidation are carried out to the molten iron in molten bath;
Step 2: after decarburization, desulfurization, deoxidation step complete, after first time triggering heating module (well heater in molten bath), heated molten bath, meanwhile, PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1600 DEG C, transmit executive signal 301 to heating module, described heating module receives executive signal 301, is adjusted to holding mode, continue insulation 5min, complete backward PLC transmitting digital signals 302; PLC receives numerary signal 302, transmits executive signal 202 to decarburization module; Decarburization module receives executive signal 202, the high carbon ferro-chrome of predetermined dose 04 is added successively in molten bath, the ferromanganese of predetermined dose 05 and the nickel shot of predetermined dose 06, the chromium content in molten bath, Fe content, nickel content is made to reach pre-provisioning request, complete backward PLC transmitting digital signals 203, PLC receives numerary signal 203, transmits executive signal 303 to heating module; Described heating module receives executive signal 303, continues the temperature 5min of maintenance 1600 DEG C, completes backward PLC transmitting digital signals 304;
Step 3:PLC receives numerary signal 304, executive signal 401 is transmitted to reminding module, described reminding module receives numerary signal 401, start warning horn, send prompt tone, remind staff to add raw material molybdenum-iron, vanadium iron, ferrotianium and ferro-niobium, and continue to add decarburizer and carry out decarburization, until iron melts completely; Second time triggers heating module (well heater in molten bath), heated molten bath, and PLC continues to receive digital signaling zero 01 simultaneously, when temperature value in molten bath reaches 1700 DEG C, transmits executive signal 402 to reminding module, transmits executive signal 305 simultaneously to heating module; Described reminding module receives executive signal 402, starts warning horn, sends prompt tone, reminds staff to trigger decarburization module; Heating module receives to executive signal 305, continues insulation 5min, completes backward PLC transmitting digital signals 306; PLC receives numerary signal 306, transmits executive signal 204 to decarburization module; Decarburization module receives executive signal 204, the reductor of the dehydrogenating agent of predetermined dose 07, the denitrfying agent of predetermined dose 08, the decarburizer of predetermined dose 09, the sweetening agent of predetermined dose 10 and predetermined dose 11 is added successively in molten bath, now alloy composition is finely tuned, make it to reach predetermined component requirements, after completing, to PLC transmitting digital signals 205; PLC receives numerary signal 205, transmits executive signal 206 to decarburization module; Described decarburization module receives executive signal 206, continues to add decarburizer in molten bath, continues decarburization, controls the content of carbon, until when receiving executive signal 207, stops adding;
Step 4: carbon content detection module detects the carbon content values in molten bath, and be converted into numerary signal 101 and be passed to PLC; PLC receives numerary signal 101, when carbon content is less than or equal to 0.18%, transmits executive signal 207 to decarburization module, meanwhile, transmits executive signal 501 to recovery module; Described decarburization module receives executive signal 207, stops adding decarburizer; Described recovery module receives executive signal 501, adds the ferrosilicon of predetermined dose 12 and the aluminium of predetermined dose 13 in molten bath, and the chromium metal in reduction molten bath, controls the content of Silicified breccias, make it to reach predetermined component requirements;
Step 5: vacuum heat-preserving 9min; The rare earth of specified amount is added in the most backward ladle;
Step 6: melted novel magnetism-free stainless steel is carried out solution treatment, heat treatment furnace is put into by novel magnetism-free stainless steel, third time triggers heating module (well heater in heat treatment furnace), heating heat treatment furnace, temperature detecting module detects the temperature value in heat treatment furnace, and is converted into digital signaling zero 02 and is passed to PLC; Described PLC receives digital signaling zero 02, when temperature value in heat treatment furnace is more than or equal to 1000 DEG C, executive signal 403 is transmitted to reminding module, transmit executive signal 307 to heating module simultaneously, described reminding module receives executive signal 403, start warning horn, send prompt tone, remind staff to trigger heating module (well heater in heat treatment furnace); Heating module receives executive signal 307, is adjusted to holding mode, stops heating after continuing insulation 5.5h; , then shrend is to room temperature;
Step 7: after novel magnetism-free stainless steel solution treatment terminates, carry out stabilization treatment, namely heating module (well heater in heat treatment furnace) is triggered the 4th time, heating heat treatment furnace, PLC continues to receive digital signaling zero 02, when temperature value second time reaches 850 DEG C in heat treatment furnace, transmit executive signal 308 to heating module; Heating module receives executive signal 308, is adjusted to holding mode, stops heating after continuing insulation 4.5h; Then sky is cooled to room temperature;
Step 8: this novel magnetism-free stainless steel also needs to carry out destressing process after cold working or welding, namely heating module (well heater in tempering stove) is triggered the 5th time, heated draw furnace, temperature detecting module detects the temperature value in tempering stove, and is converted into digital signaling zero 03 and is passed to PLC; Described PLC receives digital signaling zero 03, when temperature value is more than or equal to 600 DEG C, transmits executive signal 309 to heating module; Described heating module receives executive signal 309, is adjusted to holding mode, stops heating after continuing insulation 1.5h; Be heated to 600 DEG C ~ 650 DEG C tempering by the novel magnetism-free stainless steel after cold working or welding, temperature rise rate is 80 DEG C/h, and insulation 1 ~ 2h, then furnace cooling is to room temperature.
The preparation method of this kind of novel magnetism-free stainless steel:
Raw material iron is put into converter heat fused, after raw material iron all melts, regulates bath temperature, make bath temperature control, at about 1550 DEG C, then in molten bath, to add decarburizer, sweetening agent, reductor, decarburization, desulfurization, deoxidation are carried out to the molten iron in molten bath, then heat up bath temperature, make it to reach about 1600 DEG C, keep 5min, then in molten bath, add high carbon ferro-chrome continuously, ferromanganese and nickel shot, make the chromium content in molten bath, Fe content, nickel content reaches pre-provisioning request, and continue to add decarburizer and carry out decarburization, after iron has melted, regulate temperature, temperature is made to control at about 1600 DEG C, keep 5min, raw material molybdenum-iron is added again in molten bath, vanadium iron, ferrotianium and ferro-niobium, raise bath temperature, temperature is made to control at 1700 DEG C, keep 5min, add dehydrogenating agent, denitrfying agent, now alloy composition is finely tuned, the mass percent of alloying constituent is made to reach requirement, continue decarburization, control the content of carbon, when carbon content reaches 0.1% ~ 0.18%, the chromium metal in ferrosilicon and aluminium reducing molten bath is added in molten bath, and control the content of Silicified breccias, make it to reach predetermined component requirements, vacuum heat-preserving 9min, smelt and terminate, the rare earth of specified amount is added in the most backward ladle, the mass percent of above-mentioned Chemical Composition controls as follows: carbon is 0.1%, nickel is 11%, chromium is 19%, manganese is 2%, silicon 0.5%, niobium is 0.65%, vanadium is 0.14%, molybdenum is 1.7%, titanium is 0.025%, aluminium is 0.01%, nitrogen 1.2%, rare earth is 0.2%, the total amount of p and s is no more than 0.035%, surplus is iron and inevitable impurity thereof.
After melting terminates, to heat-treat novel magnetism-free stainless steel, thermal treatment process is as follows: step 1, melted novel magnetism-free stainless steel is carried out solution treatment, put into heat treatment furnace by novel magnetism-free stainless steel and be heated to 1000 DEG C, temperature rise rate is 100 DEG C/h, insulation 6h, then shrend is to room temperature; After step 2, novel magnetism-free stainless steel solution treatment terminate, carry out stabilization treatment, be heated to 870 DEG C by the novel magnetism-free stainless steel after solution treatment, temperature rise rate is 90 DEG C/h, and insulation 4h, then sky is cooled to room temperature, and thermal treatment terminates.
Novel magnetism-free stainless steel also needs to carry out destressing process after cold working or welding, and be heated to 600 DEG C of tempering by the novel magnetism-free stainless steel after cold working or welding, temperature rise rate is 80 DEG C/h, and insulation 2h, then furnace cooling is to room temperature.
Anti-corrosion magnetism-free stainless steel after above-mentioned steps machines is compared with 12Cr18Ni9 steel, mechanical property is improved significantly, due to containing multiple alloying element, influence each other between each element, significantly can improve the over-all properties of novel magnetism-free stainless steel, meanwhile, its high-wearing feature had and toughness can adapt in the such complex environment in ocean completely, and its safety and stability is reliable.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (1)
1. an intelligent preparation method for novel magnetism-free stainless steel, it is characterized in that, it comprises the following steps:
Step 1: raw material iron is put into converter heat fused, after raw material iron all melts, regulate bath temperature, temperature detecting module detects temperature value in molten bath, and is converted into digital signaling zero 01 and is passed to PLC; Described PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1550 DEG C, transmit executive signal 201 to decarburization module, described decarburization module receives executive signal 201, adds the decarburizer of predetermined dose 01, the sweetening agent of predetermined dose 02 and the reductor of predetermined dose 03 in molten bath successively; Decarburization, desulfurization, deoxidation are carried out to the molten iron in molten bath;
Step 2: after decarburization, desulfurization, deoxidation step complete, after first time triggering heating module, heated molten bath, meanwhile, PLC receives digital signaling zero 01, when temperature value in molten bath reaches 1600 DEG C, transmit executive signal 301 to heating module, described heating module receives executive signal 301, is adjusted to holding mode, continue insulation 5min, complete backward PLC transmitting digital signals 302; PLC receives numerary signal 302, transmits executive signal 202 to decarburization module; Decarburization module receives executive signal 202, the high carbon ferro-chrome of predetermined dose 04 is added successively in molten bath, the ferromanganese of predetermined dose 05 and the nickel shot of predetermined dose 06, the chromium content in molten bath, Fe content, nickel content is made to reach pre-provisioning request, complete backward PLC transmitting digital signals 203, PLC receives numerary signal 203, transmits executive signal 303 to heating module; Described heating module receives executive signal 303, continues the temperature 5min of maintenance 1600 DEG C, completes backward PLC transmitting digital signals 304;
Step 3:PLC receives numerary signal 304, executive signal 401 is transmitted to reminding module, described reminding module receives numerary signal 401, start warning horn, send prompt tone, remind staff to add raw material molybdenum-iron, vanadium iron, ferrotianium and ferro-niobium, and continue to add decarburizer and carry out decarburization, until iron melts completely; Second time triggers heating module, heated molten bath, and PLC continues to receive digital signaling zero 01 simultaneously, when temperature value in molten bath reaches 1700 DEG C, transmits executive signal 402 to reminding module, transmits executive signal 305 simultaneously to heating module; Described reminding module receives executive signal 402, starts warning horn, sends prompt tone, reminds staff to trigger decarburization module; Heating module receives to executive signal 305, continues insulation 5min, completes backward PLC transmitting digital signals 306; PLC receives numerary signal 306, transmits executive signal 204 to decarburization module; Decarburization module receives executive signal 204, the reductor of the dehydrogenating agent of predetermined dose 07, the denitrfying agent of predetermined dose 08, the decarburizer of predetermined dose 09, the sweetening agent of predetermined dose 10 and predetermined dose 11 is added successively in molten bath, now alloy composition is finely tuned, make it to reach predetermined component requirements, after completing, to PLC transmitting digital signals 205; PLC receives numerary signal 205, transmits executive signal 206 to decarburization module; Described decarburization module receives executive signal 206, continues to add decarburizer in molten bath, continues decarburization, controls the content of carbon, until when receiving executive signal 207, stops adding;
Step 4: carbon content detection module detects the carbon content values in molten bath, and be converted into numerary signal 101 and be passed to PLC; PLC receives numerary signal 101, when carbon content is less than or equal to 0.18%, transmits executive signal 207 to decarburization module, meanwhile, transmits executive signal 501 to recovery module; Described decarburization module receives executive signal 207, stops adding decarburizer; Described recovery module receives executive signal 501, adds the ferrosilicon of predetermined dose 12 and the aluminium of predetermined dose 13 in molten bath, and the chromium metal in reduction molten bath, controls the content of Silicified breccias, make it to reach predetermined component requirements;
Step 5: vacuum heat-preserving 9min; The rare earth of specified amount is added in the most backward ladle;
Step 6: melted novel magnetism-free stainless steel is carried out solution treatment, put into heat treatment furnace by novel magnetism-free stainless steel, third time triggers heating module, heating heat treatment furnace, temperature detecting module detects the temperature value in heat treatment furnace, and is converted into digital signaling zero 02 and is passed to PLC; Described PLC receives digital signaling zero 02, when temperature value in heat treatment furnace is more than or equal to 1000 DEG C, executive signal 403 is transmitted to reminding module, transmit executive signal 307 to heating module simultaneously, described reminding module receives executive signal 403, start warning horn, send prompt tone, remind staff to trigger heating module; Heating module receives executive signal 307, is adjusted to holding mode, stops heating after continuing insulation 5.5h; , then shrend is to room temperature;
Step 7: after novel magnetism-free stainless steel solution treatment terminates, carry out stabilization treatment, namely triggers heating module the 4th time, heating heat treatment furnace, PLC continues to receive digital signaling zero 02, when temperature value second time reaches 850 DEG C in heat treatment furnace, transmits executive signal 308 to heating module; Heating module receives executive signal 308, is adjusted to holding mode, stops heating after continuing insulation 4.5h; Then sky is cooled to room temperature;
Step 8: this novel magnetism-free stainless steel also needs to carry out destressing process after cold working or welding, namely trigger heating module, heated draw furnace the 5th time, temperature detecting module detects the temperature value in tempering stove, and is converted into digital signaling zero 03 and is passed to PLC; Described PLC receives digital signaling zero 03, when temperature value is more than or equal to 600 DEG C, transmits executive signal 309 to heating module; Described heating module receives executive signal 309, is adjusted to holding mode, stops heating after continuing insulation 1.5h; Be heated to 600 DEG C ~ 650 DEG C tempering by the novel magnetism-free stainless steel after cold working or welding, temperature rise rate is 80 DEG C/h, and insulation 1 ~ 2h, then furnace cooling is to room temperature.
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