CN107881326A - The processing method of stainless steel tube - Google Patents
The processing method of stainless steel tube Download PDFInfo
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- CN107881326A CN107881326A CN201711302335.9A CN201711302335A CN107881326A CN 107881326 A CN107881326 A CN 107881326A CN 201711302335 A CN201711302335 A CN 201711302335A CN 107881326 A CN107881326 A CN 107881326A
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- stainless steel
- steel tube
- processing method
- blank
- sintering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/002—Stainless steels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention discloses a kind of processing method of stainless steel tube, comprise the following steps：（1）Molten steel is refined：a:Sintering；b：Melting；c:Logical nitrogen；（2）Continuous casting：Step will be passed through by conticaster（1）Raw material after processing carries out continuous casting steel machine, and circular pipe is made；（3）Surely cut and pickling：Pipe is cut into the blank of 4m 6m length by cutting machine, acid wash passivation is carried out to blank by acid-washing stainless steel passivating solution afterwards；（3）Heating.The content of nitrogen is up to 3.5 5 wt% in stainless steel tube of the present invention, ensures that stainless steel tube has good corrosion resistance, pull resistance and high intensity；And add rare earth element and copper simultaneously and can realize synergy, effectively improve the species for killing the bacterial micro-organism in stainless steel and significantly shorten the time, improve efficiency, improve the resistance to corrosion of stainless steel.
Description
Technical field
The invention belongs to stainless steel tube manufacturing technology field, more particularly, to a kind of processing method of stainless steel tube.
Background technology
Stainless steel is a kind of hollow strip circular steel, be widely used mainly in oil, chemical industry, medical treatment, food, light industry,
The industrial transportation pipe lines such as machinery instrument and machine structural parts etc..Existing stainless steel tube composition proportion reasonability is poor, no
Nitrogen content in rust steel pipe is generally relatively low, and essentially below 2.5wt%, intensity, pull resistance, the corrosion resistance of stainless steel tube are poor,
Service life is shorter.
The content of the invention
The present invention is for overcome the deficiencies in the prior art, there is provided the stainless steel tube that a kind of nitrogen content is high, service life is grown
Processing method.
To achieve these goals, the present invention uses following technical scheme：A kind of processing method of stainless steel tube, including with
Lower step：
（1）Molten steel is refined：a:Sintering：Choose embryo material sintering and reducing and obtain embryo material A；b：Melting：By embryo material A, molten steel, rare earth element
In input to smelting furnace, raw material is obtained after melting;Nitrogen is passed through in smelting process into smelting furnace；
（2）Shaping：Raw material is subjected to continuous casting steel machine, circular pipe is made, and pipe is cut into the blank of 4-6m length, to base
After material carries out acid wash passivation, blank is heated and softened and perforated, obtains hollow circular Stainless pipe billet；
Aligning：Circular Stainless pipe billet is reheated after drying machine drying, and Stainless pipe billet is carried out by straightener afterwards
Aligning, obtains stainless steel tube finished product.
Further, the embryo material is iron ore, lateritic nickel ore, coke, silica, manganese dioxide, copper mine；By grinding
Grinding machine is inserted in sintering furnace after being ground to embryo material.
Preferably, the embryo material is iron ore, pentlandite, coke, silica, psilomelane, chalcopyrite, the iron
The water content of ore is 15-35%, and the water content of the pentlandite is 10-30%；After being ground by grinder to embryo material
Insert in sintering furnace；Ore water content is low, reduces the power consumption in sintering, realizes energy-conservation；And above-mentioned ore is common ore, into
This low, readily available raw material.
Further, after the ground machine grinding of the embryo material, 800-1000 mesh sieves were needed；The temperature of the sintering furnace is
1200 DEG C, pressure 1-5Mpa, sintering time 72-96h；Experiment show that, when sintering temperature is less than 1200 DEG C, pressure is less than 1
Mpa, when sintering time is less than 72h, the sintering situation of embryo material is poor, and embryo material A densification effect is poor made from sintering completion, institute
The impurity contained is more, influences the purity of later stage work pieces process and smelts the effect of melting；When sintering temperature be higher than 1200 DEG C, pressure
It is higher than 5 Mpa by force, when sintering time is more than 96h, melting sources easily occurs and be bonded in impurity in final embryo material A, equally
The purity of the fused solution in later stage can be influenceed；And when sintering temperature is equal to 1200 DEG C, pressure is in 1-5 Mpa, and sintering time is in
During 72-96h, the embryo material A degree of densification for sintering to obtain is best, and the impurity level contained in it is minimum；Above-mentioned data ratio be through
Cross the optimum data that substantial amounts of proportioning collocation experiment obtains.
Preferably, the step（1）In, the temperature of smelting furnace is 1500-1600 DEG C, pressure 1.2-1.5Mpa, is melted
The refining time is 20-40min；Learnt after lot of experiments is tested, under above-mentioned data area, the raw material in smelting furnace can be abundant
Melting, smelting furnace are also at situation about saving the most；And fused solution proper temperature, without be heated again in later stage casting process
Processing, reduce energy resource consumption.
Preferably, the intake of the nitrogen maintains 5-8L/min, and it is 20-30min to be passed through the time；When being passed through for nitrogen
Amount is less than 5 L/min, and when being passed through the time and being less than 20min, the nitrogen content after final molding in workpiece will be less than 2.5 wt%, can not
Meet that nitrogen content need to be higher than 3.5 wt% requirement；And when the intake of nitrogen is higher than 8 L/min, being passed through the time is more than 30min
Afterwards, persistently extend even if being passed through the time, the nitrogen content after final molding in workpiece, which also can be only sustained at 5 wt%, to be increased
It is long, it is excessive to be passed through nitrogen and only cause the waste of the energy；Above-mentioned data area obtains afterwards by substantial amounts of experiment
Optimal values, when nitrogen intake maintains 5-8L/min, be passed through the time in the state of 20-30min, both can guarantee that workpiece into
Nitrogen content meets to require after type, and and can enough prevents the wasting of resources.
Further, when blank softens, blank is placed in rotary heating furnace, is warming up to 850-1020 DEG C, is realized to base
The softening of material.
Further, in addition to step（4）Ultrasonic examination：Finished product is visited by automatic ultrasonic inspection equipment
Wound, detect qualified rear progress outbound processing
Further, described reheating is realized using following steps：Stainless pipe billet is placed in rotary heating furnace, annular adds
Hot stove is warming up to 850-875 DEG C and blank is heated and softened；During aligning, without softening inside pipe, only need exterior section soft
Change, and because the initial softening temperature of steel is 850 DEG C, fusing point is 1050 DEG C, therefore uses 850-875 DEG C of temperature to stainless
When steel pipe base is heated, pipe exterior section can soften, and interior section can't soften, so that can be effective
Meet the softening demand of aligning, and can prevents that heating-up temperature is too high and causes the excessive waste of the energy, energy-conserving and environment-protective.
Further, the furnace shell of the smelting furnace is provided with nitrogen inlet, and the porch stretches out to form a connecting portion,
Porch extends inwardly to form the passage being connected with burner hearth；The connecting portion is provided with an air inlet component.
Further, the air inlet pipe includes first body connected with the intake section, the second body and for being connected
The joint of first body and the second body.
Further, first body is stainless steel tube, and second body is rubber tube；Due to the work temperature of burner hearth
Degree is very high, so as to which the first body being connected with connecting portion will be influenceed by high temperature, so the first body is arranged to not
Become rusty steel pipe, will not be influenceed by high temperature so as to the first body, is not in the situation of the first body deformation, is further ensured that the
Sealing between one body and intake section coordinates；And the second body and burner hearth is distant, without considering because high temperature causes
Deformation or thawing situation, so the second body can use rubber tube, not only save cost, and rubber tube has larger shape
The ability of change, so as to which the sealing between the first body is preferable, while equipment cost is reduced, further improve equipment
Sealing property.
In summary, the present invention has advantages below：The content of nitrogen is up to 3.5-5 in obtained stainless steel tube
Wt%, ensure that stainless steel tube has good corrosion resistance, pull resistance and high intensity, service life length；It is and same in process
When add rare earth element and copper, so as to which the rare earth element in stainless steel and copper can realize synergy, effectively carry
Height kills the species of the bacterial micro-organism in stainless steel and significantly shortens the time, improves efficiency, improves the anti-corruption of stainless steel
Erosion ability.
Figure of description
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the partial enlarged drawing in Fig. 1.
Embodiment
In order that those skilled in the art are better understood from the present invention program, below in conjunction with the embodiment of the present invention,
Clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
Embodiment 1
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 200kg, lateritic nickel ore 120kg, coke 10kg,
Silica 50kg, manganese dioxide 30kg, copper mine 100kg, the water content of the iron ore is 10%, and the lateritic nickel ore contains
Water is 20%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 800 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 1Mpa, sintering time 72h；b：Melting：Will be through
Embryo material, molten steel 500L and rare earth element 50kg after oversintering reduction are put into smelting furnace, and raw material is obtained after melting;Tool
Body, the temperature of smelting furnace is 1500 DEG C, pressure 1.2Mpa, smelting time 20min；c:Logical nitrogen：In fusion process, dimension
The intake for holding 5L/min is passed through nitrogen into smelting furnace, and maintenance is passed through 20min；Need to carry out smelting furnace before logical nitrogen
Vacuum pumping, it is passed through nitrogen into it again afterwards；And in venting process, need to open again to enter smelting furnace every 5min
Row vacuum pumping, prevent that the air pressure in smelting furnace is excessive；（2）Shaping：Comprise the following steps：Continuous casting：Will be through by conticaster
Cross step（1）Raw material after processing carries out continuous casting steel machine, and circular Stainless pipe billet is made；Surely cut and pickling：Pass through cutting machine
Pipe is cut into the blank of 4m length, acid wash passivation is carried out to blank by acid-washing stainless steel passivating solution afterwards；Heating：By blank
It is placed in rotary heating furnace, is warming up to 850 DEG C and blank is heated and softened；Perforation：Blank after softening passes through pressure piercing
Machine carries out inner perforated, hollow circular Stainless pipe billet；Deoil：Above-mentioned Stainless pipe billet is carried out using degreasing agent cleaning clear
Wash, remove the grease of stainless steel tube blank outer surface；（3）Aligning：Circular Stainless pipe billet base is after drying machine drying, then is placed in
In rotary heating furnace, it is warming up to 850 DEG C and blank is heated and softened, Stainless pipe billet is rectified by straightener after softening
Directly, stainless steel tube finished product is obtained；（4）Ultrasonic examination：Finished product is detected a flaw by automatic ultrasonic inspection equipment, detection is closed
Outbound processing is carried out after lattice.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Final obtained stainless pipe, the mass percent of its each component are：C：0.001%, Si：0.2%, Mn：
0.1%,Ni：8.0%, Cu：5%, N：3%, lanthanum (La)：1.56%, praseodymium (Pr)：0.45%, neodymium (Nd)：0.36%, gadolinium (Gd)：0.3%,
Terbium (Tb)：0.24%, lutetium (Lu)：0.09%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
As shown in Figure 1-2, the furnace shell 11 of the smelting furnace 1 is provided with nitrogen inlet, and the porch stretches out to form one
Connecting portion 12, porch extend inwardly to form the passage 13 being connected with burner hearth；The connecting portion 12 is provided with an air inlet component
14, the nitrogen is filled with to burner hearth by the air inlet component 14；Specifically, the air inlet component 14 include the first body 142,
Second body 143 and the stainless joint 144 for connecting the first body 142 and the second body 143；Set on the connecting portion 12
There is connecting cavity, the connection cavity wall is provided with internal thread, and the end of the first body 142 is located at external screw thread, so as to air inlet component
It can be spirally connected with connecting portion；In order to improve sealing between the two, gas leakage situation is prevented, ensures all the time to locate inside smelting furnace
In vacuum state；Specifically, the seal 3 of annular is fixed with the connecting cavity inner bottom wall by the first adhesive linkage 2, described the
The end of one body 142 is connected again by the second adhesive linkage 4 with the seal 3, and as preferable, the air inlet component
Evenly spaced on 14 end faces that multi-ring annular groove 141 is distributed with, first adhesive linkage 2, the second adhesive linkage 4 are on the market
The refractory seals glue being directly commercially available, the material can bear high temperature, so as under the hot environment of smelting, can also play
Good sealing function, and be hardly damaged, service life length；It is recessed by annular when air inlet component end is Nian Jie with seal
The setting of groove 141 so that refractory seals glue can be stayed in more on the end face of air inlet component, so that air inlet component end
Connection between seal is more firm, good sealing effect；Further, the connecting cavity internal thread and the outer spiral shell of air inlet component
It is provided with adhesive linkage between line, the adhesive linkage is the refractory seals glue being directly commercially available on the market, smelting furnace reaction temperature pole
In the case of height, refractory seals glue is not easy to the situation for hardening cracking or degumming occur, realizes good sealing effectiveness；Bonding
Layer is effectively sealed to both junctions, further reduces the possibility of gas leakage；Specifically, seal is directly to adopt on the market
The soft graphite Composition spacer bought, the material can bear high temperature, so as under the hot environment of smelting, can also play good
Good sealing function, and be hardly damaged, service life length.
When the first body 142 is connected with connecting portion, refractory seals glue is coated in seal outer surface in advance, afterwards
Seal is incorporated into connecting cavity, is connected with connecting cavity bottom wall；It need to be applied afterwards in the first body 142 on the end face with connecting portion
Refractory seals glue is covered, and the end of the first body 142 is spirally connected with connecting portion；After the completion of being spirally connected, the side wall of the first body 142 with
Refractory seals glue is filled out in gap between connection cavity wall, is finally completed the connection of the first body 142 and connecting portion.
Preferably, first body 142 is stainless steel tube, i.e., the material of first body is stainless steel；Described
Two bodys 143 are rubber tube, i.e., the material of second body is rubber；Certainly, in other embodiment, second body
143 or pvc pipe or PPC pipes, i.e., this and the material of body is PVC or PPC.
The miscellaneous part of smelting furnace is prior art, is referred to disclosed in Chinese patent CN101347836B《Vacuum sense
Answer smelting furnace》Disclosed in structure, therefore repeat no more.
Embodiment 2
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 220kg, lateritic nickel ore 180kg, coke 15kg,
Silica 70kg, manganese dioxide 50kg, copper mine 150kg, the water content of the iron ore is 30%, and the lateritic nickel ore contains
Water is 40%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 1000 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 5Mpa, sintering time 96h；b：Melting：Will
Embryo material, molten steel 500L and rare earth element 70kg after sintering and reducing are put into smelting furnace, and raw material is obtained after melting;
Specifically, the temperature of smelting furnace is 1600 DEG C, pressure 1.5Mpa, smelting time 40min；c:Logical nitrogen：In fusion process,
8L/min intake is maintained to be passed through nitrogen into smelting furnace, maintenance is passed through 30min；Need to enter smelting furnace before logical nitrogen
Row vacuum pumping, is passed through nitrogen into it again afterwards；And in venting process, need to open again to smelting furnace every 5min
Vacuum pumping is carried out, prevents that the air pressure in smelting furnace is excessive；（2）Shaping：Comprise the following steps：Continuous casting：Will by conticaster
By step（1）Raw material after processing carries out continuous casting steel machine, and circular pipe is made；Surely cut and pickling：Will by cutting machine
Pipe is cut into the blank of 6m length, carries out acid wash passivation to blank by acid-washing stainless steel passivating solution afterwards；Heating：Blank is put
In rotary heating furnace, it is warming up to 1020 DEG C and blank is heated and softened；Perforation：Blank after softening passes through press piercing mill
Carry out inner perforated, hollow circular Stainless pipe billet；Deoil：Above-mentioned Stainless pipe billet is carried out using degreasing agent cleaning clear
Wash, remove the grease of stainless steel tube blank outer surface；（3）Aligning：Stainless pipe billet is after drying machine drying, then is placed in annular and adds
In hot stove, it is warming up to 875 DEG C and blank is heated and softened, Stainless pipe billet is aligned by straightener after softening, obtained
To stainless steel tube finished product；（4）Ultrasonic examination：Finished product is detected a flaw by automatic ultrasonic inspection equipment, after detection is qualified
Carry out outbound processing.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Obtained stainless pipe is processed, the mass percent of its component is：C：0.03%, Si：0.5%, Mn：
0.4%,Ni：10%, Cu：8%, N：5%, lanthanum (La)：:2.6 %, praseodymium (Pr)：0.75%, neodymium (Nd)：0.6%, gadolinium (Gd)：
0.5%, terbium (Tb):0.4%, lutetium (Lu):0.15%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
The structure of the smelting furnace 1 is identical with the structure of smelting furnace in embodiment 1, therefore repeats no more.
Embodiment 3
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 200kg, lateritic nickel ore 130kg, coke 15kg,
Silica 50kg, manganese dioxide 30kg, copper mine 110kg, the water content of the iron ore is 20%, and the lateritic nickel ore contains
Water is 25%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 800 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 4Mpa, sintering time 80h；b：Melting：Will be through
Embryo material, molten steel 500L and rare earth element 50kg after oversintering reduction are put into smelting furnace, and raw material is obtained after melting;Tool
Body, the temperature of smelting furnace is 1550 DEG C, pressure 1.3Mpa, smelting time 35min；c:Logical nitrogen：In fusion process, dimension
The intake for holding 8L/min is passed through nitrogen into smelting furnace, and maintenance is passed through 28min；Need to carry out smelting furnace before logical nitrogen
Vacuum pumping, it is passed through nitrogen into it again afterwards；And in venting process, need to open again to enter smelting furnace every 5min
Row vacuum pumping, prevent that the air pressure in smelting furnace is excessive；（2）Shaping：Comprise the following steps：Continuous casting：Will be through by conticaster
Cross step（1）Raw material after processing carries out continuous casting steel machine, and circular pipe is made；（3）Surely cut and pickling：Will by cutting machine
Pipe is cut into the blank of 4m length, carries out acid wash passivation to blank by acid-washing stainless steel passivating solution afterwards；（3）Heating：By base
Material is placed in rotary heating furnace, is warming up to 880 DEG C and blank is heated and softened；（4）Perforation：Blank after softening passes through pressure
Punch carries out inner perforated, hollow circular Stainless pipe billet；（5）Deoil：Cleaned using degreasing agent to above-mentioned stainless steel tube
Base is cleaned, and removes the grease of stainless steel tube blank outer surface；（6）Aligning：Step（6）In Stainless pipe billet pass through dryer
After drying, then it is placed in rotary heating furnace, is warming up to 870 DEG C and blank is heated and softened, by straightener to not after softening
Rust steel pipe base is aligned, and obtains stainless steel tube finished product；（7）Ultrasonic examination：By automatic ultrasonic inspection equipment to finished product
Detected a flaw, detect qualified rear progress outbound processing.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Obtained stainless pipe is processed, the mass percent of its component is：C：0.03%, Si：0.4%, Mn：0.3%,
Ni：8%, Cu：5%, N：5%, lanthanum (La)：1.56%, praseodymium (Pr)：0.45%, neodymium (Nd)：0.36%, gadolinium (Gd)：0.3%, terbium (Tb)：
0.24%, lutetium (Lu)：0.09%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
The structure of the smelting furnace 1 is identical with the structure of smelting furnace in embodiment 1, therefore repeats no more.
Embodiment 4
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 200kg, pentlandite 120kg, coke 10kg,
Silica 50kg, psilomelane 30kg, chalcopyrite 100kg, the water content of the iron ore is 15%, and the lateritic nickel ore contains
Water is 10%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 800 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 1Mpa, sintering time 72h；b：Melting：Will be through
Embryo material, molten steel 500L and rare earth element 50kg after oversintering reduction are put into smelting furnace, and raw material is obtained after melting;Tool
Body, the temperature of smelting furnace is 1500 DEG C, pressure 1.2Mpa, smelting time 20min；c:Logical nitrogen：In fusion process, dimension
The intake for holding 5L/min is passed through nitrogen into smelting furnace, and maintenance is passed through 20min；Need to carry out smelting furnace before logical nitrogen
Vacuum pumping, it is passed through nitrogen into it again afterwards；And in venting process, need to open again to enter smelting furnace every 5min
Row vacuum pumping, prevent that the air pressure in smelting furnace is excessive；（2）Continuous casting：Step will be passed through by conticaster（1）After processing
Raw material carries out continuous casting steel machine, and circular pipe is made；（3）Surely cut and pickling：Pipe is cut into the base of 4m length by cutting machine
Material, acid wash passivation is carried out to blank by acid-washing stainless steel passivating solution afterwards；（3）Heating：Blank is placed in rotary heating furnace,
850 DEG C are warming up to heat and soften blank；（4）Perforation：Blank after softening carries out inner perforated by press piercing mill,
Hollow circular Stainless pipe billet；（5）Deoil：Above-mentioned Stainless pipe billet is cleaned using degreasing agent cleaning, removed stainless
The grease of steel pipe blank outer surface；（6）Aligning：Step（6）In Stainless pipe billet after drying machine drying, then be placed in annular plus
In hot stove, it is warming up to 850 DEG C and blank is heated and softened, Stainless pipe billet is aligned by straightener after softening, obtained
To stainless steel tube finished product；（7）Ultrasonic examination：Finished product is detected a flaw by automatic ultrasonic inspection equipment, after detection is qualified
Carry out outbound processing.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Final obtained stainless pipe, the mass percent of its each component are：C：0.001%, Si：0.2%, Mn：
0.1%,Ni：8.0%, Cu：5%, N：3%, lanthanum (La)：1.56%, praseodymium (Pr)：0.45%, neodymium (Nd)：0.36%, gadolinium (Gd)：0.3%,
Terbium (Tb)：0.24%, lutetium (Lu)：0.09%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
The structure of the smelting furnace 1 is identical with the structure of smelting furnace in embodiment 1, therefore repeats no more.
Embodiment 5
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 220kg, pentlandite 180kg, coke 15kg,
Silica 70kg, psilomelane 50kg, chalcopyrite 150kg, the water content of the iron ore is 35%, and the lateritic nickel ore contains
Water is 30%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 1000 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 5Mpa, sintering time 96h；b：Melting：Will
Embryo material, molten steel 500L and rare earth element 70kg after sintering and reducing are put into smelting furnace, and raw material is obtained after melting;
Specifically, the temperature of smelting furnace is 1600 DEG C, pressure 1.5Mpa, smelting time 40min；c:Logical nitrogen：In fusion process,
8L/min intake is maintained to be passed through nitrogen into smelting furnace, maintenance is passed through 30min；Need to enter smelting furnace before logical nitrogen
Row vacuum pumping, is passed through nitrogen into it again afterwards；And in venting process, need to open again to smelting furnace every 5min
Vacuum pumping is carried out, prevents that the air pressure in smelting furnace is excessive；（2）Continuous casting：Step will be passed through by conticaster（1）After processing
Raw material carry out continuous casting steel machine, circular pipe is made；（3）Surely cut and pickling：Pipe is cut into by 6m length by cutting machine
Blank, acid wash passivation is carried out to blank by acid-washing stainless steel passivating solution afterwards；（3）Heating：Blank is placed in rotary heating furnace
In, it is warming up to 1020 DEG C and blank is heated and softened；（4）Perforation：Blank after softening is carried out internal by press piercing mill
Perforation, hollow circular Stainless pipe billet；（5）Deoil：Above-mentioned Stainless pipe billet is cleaned using degreasing agent cleaning, removed
The grease of stainless steel tube blank outer surface；（6）Aligning：Step（6）In Stainless pipe billet after drying machine drying, then be placed in ring
In shape heating furnace, it is warming up to 875 DEG C and blank is heated and softened, Stainless pipe billet is rectified by straightener after softening
Directly, stainless steel tube finished product is obtained；（7）Ultrasonic examination：Finished product is detected a flaw by automatic ultrasonic inspection equipment, detection is closed
Outbound processing is carried out after lattice.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Obtained stainless pipe is processed, the mass percent of its component is：C：0.03%, Si：0.5%, Mn：
0.4%,Ni：10%, Cu：8%, N：5%, lanthanum (La)：:2.6 %, praseodymium (Pr)：0.75%, neodymium (Nd)：0.6%, gadolinium (Gd)：
0.5%, terbium (Tb):0.4%, lutetium (Lu):0.15%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
The structure of the smelting furnace 1 is identical with the structure of smelting furnace in embodiment 1, therefore repeats no more.
Embodiment 6
A kind of processing method of stainless steel tube, comprises the following steps：
（1）Molten steel is refined：a:Sintering：Choose embryo material, the embryo material be iron ore 200kg, pentlandite 130kg, coke 15kg,
Silica 50kg, psilomelane 30kg, chalcopyrite 110kg, the water content of the iron ore is 20%, and the lateritic nickel ore contains
Water is 20%；Inserted after grinder is ground in sintering furnace, be sintered reduction；Specifically, the ground machine grinding of embryo material
Afterwards, 800 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 4Mpa, sintering time 80h；b：Melting：Will be through
Embryo material, molten steel 500L and rare earth element 50kg after oversintering reduction are put into smelting furnace, and raw material is obtained after melting;Tool
Body, the temperature of smelting furnace is 1550 DEG C, pressure 1.3Mpa, smelting time 35min；c:Logical nitrogen：In fusion process, dimension
The intake for holding 8L/min is passed through nitrogen into smelting furnace, and maintenance is passed through 28min；Need to carry out smelting furnace before logical nitrogen
Vacuum pumping, it is passed through nitrogen into it again afterwards；And in venting process, need to open again to enter smelting furnace every 5min
Row vacuum pumping, prevent that the air pressure in smelting furnace is excessive；（2）Shaping：Comprise the following steps：Continuous casting：Will be through by conticaster
Cross step（1）Raw material after processing carries out continuous casting steel machine, and circular pipe is made；Surely cut and pickling：It will be managed by cutting machine
Base is cut into the blank of 4m length, carries out acid wash passivation to blank by acid-washing stainless steel passivating solution afterwards；Heating：Blank is placed in
In rotary heating furnace, it is warming up to 880 DEG C and blank is heated and softened；Perforation：Blank after softening is entered by press piercing mill
Row inner perforated, hollow circular Stainless pipe billet；Deoil：Above-mentioned Stainless pipe billet is cleaned using degreasing agent cleaning,
Remove the grease of stainless steel tube blank outer surface；（3）Aligning：Stainless pipe billet is after drying machine drying, then is placed in annular-heating
In stove, it is warming up to 870 DEG C and blank is heated and softened, Stainless pipe billet is aligned by straightener after softening, obtained
Stainless steel tube finished product；（4）Ultrasonic examination：Finished product is detected a flaw by automatic ultrasonic inspection equipment, detection is qualified laggard
Row outbound is handled.
Specifically, the constituent mass percentage of the rare earth element is:Lanthanum (La) 52%, praseodymium (Pr) 15%, neodymium (Nd)
12%, gadolinium (Gd) 10%, terbium (Tb) 8%, lutetium (Lu) 3%.
Obtained stainless pipe is processed, the mass percent of its component is：C：0.03%, Si：0.4%, Mn：0.3%,
Ni：8%, Cu：5%, N：5%, lanthanum (La)：1.56%, praseodymium (Pr)：0.45%, neodymium (Nd)：0.36%, gadolinium (Gd)：0.3%, terbium (Tb)：
0.24%, lutetium (Lu)：0.09%, remaining is Fe and inevitable impurity.
Above-mentioned grinder, sintering furnace, conticaster, rotary heating furnace, press piercing mill, dryer, straightener, ultrasonic wave are certainly
Dynamic defect-detecting equipment is that prior art can be realized, can be directly by being commercially available on the market, and concrete model does not limit；Stainless steel
Acid wash passivation liquid is obtained by directly purchasing on the market, and specific composition is prior art, is repeated no more；Degreasing agent is commercially available
Alkaline defatting agent, specific composition do not repeat.
The structure of the smelting furnace 1 is identical with the structure of smelting furnace in embodiment 1, therefore repeats no more.
Obviously, described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, it should all belong to the scope of protection of the invention.
Claims (10)
- A kind of 1. processing method of stainless steel tube, it is characterised in that：Comprise the following steps：Molten steel is refined：a:Sintering：Choose embryo material sintering and reducing and obtain embryo material A；b：Melting：Embryo material A, molten steel, rare earth element are thrown Enter to smelting furnace, raw material is obtained after melting;Nitrogen is passed through in smelting process into smelting furnace；Shaping：Raw material is subjected to continuous casting steel machine, circular pipe is made, and pipe is cut into the blank of 4-6m length, to blank After carrying out acid wash passivation, blank is heated and softened and perforated, obtains hollow circular Stainless pipe billet；Aligning：Circular Stainless pipe billet is reheated after drying machine drying, and Stainless pipe billet is carried out by straightener afterwards Aligning, obtains stainless steel tube finished product.
- 2. the processing method of stainless steel tube according to claim 1, it is characterised in that：The embryo material is iron ore, laterite Nickel minerals, coke, silica, manganese dioxide, copper mine；Inserted after being ground by grinder to embryo material in sintering furnace.
- 3. the processing technology for the stainless steel tube stated according to claim 1, it is characterised in that：The embryo material is iron ore, nickel yellow iron Ore deposit, coke, silica, psilomelane, chalcopyrite, the water content of the iron ore are 15-35%, the pentlandite it is aqueous Measure as 10-30%；Inserted after being ground by grinder to embryo material in sintering furnace.
- 4. the processing method of the stainless steel tube according to Claims 2 or 3, it is characterised in that：The ground machine of embryo material is ground After mill, 800-1000 mesh sieves were needed；The temperature of the sintering furnace is 1200 DEG C, pressure 1-5Mpa, sintering time 72-96h.
- 5. the processing method of the stainless steel tube according to Claims 2 or 3, it is characterised in that：The intake dimension of the nitrogen Hold in 5-8L/min, it is 20-30min to be passed through the time.
- 6. the processing method of the stainless steel tube according to Claims 2 or 3, it is characterised in that：Also include step（4）Ultrasonic wave Flaw detection：Finished product is detected a flaw by automatic ultrasonic inspection equipment, detects qualified rear progress outbound processing.
- 7. the processing method of the stainless steel tube according to Claims 2 or 3, it is characterised in that：Described reheating use with Lower step is realized：Stainless pipe billet is placed in rotary heating furnace, rotary heating furnace is warming up to 850-875 DEG C and blank is added Thermal softening.
- 8. the processing method of the stainless steel tube according to Claims 2 or 3, it is characterised in that：The smelting furnace（1）Furnace shell （11）Nitrogen inlet is provided with, the porch stretches out to form a connecting portion（11）, porch extends inwardly to form and burner hearth The passage being connected（13）；The connecting portion（12）It is provided with an air inlet component（14）.
- 9. the processing method of stainless steel tube according to claim 8, it is characterised in that：The air inlet component（14）Including with The connecting portion（12）The first connected body（142）, the second body（143）And for connecting first body and the second body Joint（144）.
- 10. the processing method of stainless steel tube according to claim 9, it is characterised in that：First body（142）For not Become rusty steel pipe, second body（143）For rubber tube.
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| CN110257726A (en) * | 2019-06-04 | 2019-09-20 | 安徽管益生新材料科技有限公司 | A kind of distortion-free stainless steel pipe production method |
| CN112207510A (en) * | 2020-09-14 | 2021-01-12 | 襄阳顺特阳光科技有限公司 | Method for machining stainless steel intercooling air inlet pipe |
| CN116083814A (en) * | 2023-02-23 | 2023-05-09 | 福建强新五金机械有限公司 | Preparation method of stainless steel pipe with high wear resistance |
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Application publication date: 20180406 |