CN109722598A - A kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate and its production method - Google Patents
A kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate and its production method Download PDFInfo
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- CN109722598A CN109722598A CN201910031817.8A CN201910031817A CN109722598A CN 109722598 A CN109722598 A CN 109722598A CN 201910031817 A CN201910031817 A CN 201910031817A CN 109722598 A CN109722598 A CN 109722598A
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Abstract
The invention discloses a kind of 12Cr1MoV to add vanadium chrome molybdenum steel plate and its production method, the steel plate chemical component composition and its mass percentage are as follows: C:0.08~0.10%, Si:0.17~0.20%, Mn:0.40~0.49%, P:0.010~0.015%, S≤0.005%, Cr:0.90~1.00%, Mo:0.25~0.30%, V:0.15~0.25%, Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus are Fe and inevitable impurity；The production method includes smelting, continuous casting, heating, rolling and heat treatment procedure.The present invention solves the problems, such as that coarse grains are uneven, impact flexibility is lower and hardness is higher using hot rolling+tempering heat treatment process.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate and its production method.
Background technique
12Cr1MoV adds vanadium chrome molybdenum steel plate to be a kind of material for manufacturing compo pipe.It is mainly applicable in production boiler
Steel construction piece, using temperature up to 580 DEG C, it is desirable that steel plate has a higher high temperature resistant creep rupture strength, steel plate generally with rolling+tempering or
Normalizing+annealed strip delivery.
12Cr1MoV steel alloy is to be suitably added one or several kinds of alloying elements on the basis of carbon constructional quality steel,
For improving the mechanical property, toughness and harden ability of steel.With the product of such steel making, thermally treated (normalizing or tune are usually needed
Matter)；Its manufactured parts and components by quenched or chemical surface treatment (carburizing, nitridation etc.), surface before use, need to usually quench
The processing such as fire or high-frequency quenching.Therefore, according to chemical component (mainly phosphorus content), the difference of heat treatment process and purposes, this
Class steel can substantially be divided into carburizing, quenched and three kinds of nitrated steel again.
12Cr1MoV adds vanadium chrome molybdenum steel plate to smelt using electric arc furnaces or converter mode, and the objectionable impurities elements content such as P, S is low,
Steel is pure；It can solve that coarse grains are uneven, impact flexibility is lower and hardness is higher using hot rolling+tempering heat treatment process
The problem of；Ingredient design uses Cr, Mo, V alloy elements compounding intensifying method, can obtain with more tiny institutional framework and good
The steel plate of the matched resistance to brittleness energy of good obdurability, while it being able to satisfy the requirement of soft again, it generates and splits when can reduce welding
The risk of line can be effectively reduced the difficulty of equipment manufacturing manufacture.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of 12Cr1MoV to add vanadium chrome molybdenum steel plate；While the present invention also provides
A kind of 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate, institute
State steel plate chemical component composition and its mass percentage are as follows: C:0.08~0.10%, Si:0.17~0.20%, Mn:0.40~
0.49%, P:0.010~0.015%, S≤0.005%, Cr:0.90~1.00%, Mo:0.25~0.30%, V:0.15~
0.25%, Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%,
Surplus is Fe and inevitable impurity.
Steel plate thickness of the present invention is 20~80mm.
Mechanical property of steel plate of the present invention: Rp0.2: 245~400MPa, Rm:490~620MPa, A >=22%, -10 DEG C
Lower Kv2≥54J；Hardness number≤225HB.
The present invention also provides the production method that a kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate, the production method includes smelting
Refining, continuous casting, heating, rolling and heat treatment procedure；The heating process, continuous-type furnace heating, using multi-platform heater
Skill；The rolling process, using hot rolling technology, start rolling temperature is 1050~1100 DEG C；The heat treatment procedure, using tempering heat
Processing, tempering temperature are 680~700 DEG C.
Heating process of the present invention is executed stewing using multi-platform heating process after steel billet is packed into continuous-type furnace
Steel technique, steel loading temperature≤300 DEG C, turns off burner, with 8~9h of furnace Temperature fall；Then 400 are warming up to 70 DEG C/h speed~
410 DEG C, keep the temperature 4~5h；Then 930~940 DEG C are risen to≤75 DEG C/h speed, keeps the temperature 6~7h；Again with≤75 DEG C/h speed liter
To 1240~1250 DEG C, 7~8h is kept the temperature；1230~1240 DEG C then are down to≤75 DEG C/h speed, keeps the temperature 6~7h.
Rolling process of the present invention, using hot rolling technology, draught per pass >=10%, finishing temperature >=898 DEG C.
Heat treatment procedure of the present invention, using tempering heat treatment, tempering insulation time is 3.5*t minutes, and the t is steel
The mm of thickness of plate, air-cooled finished product steel plate after heat preservation.
Smelting procedure of the present invention is smelted using electric arc furnaces or converter mode, when molten steel temperature reaches 1600~1610
DEG C when tap；It is then fed into LF refining furnace refining 1h, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content according to de- S situation,
Make up to the component requirements that 12Cr1MoV adds vanadium chrome molybdenum steel plate, vacuumize process >=30min after refining, vacuum degree 30~
65Pa。
Continuous casting working procedure of the present invention, smelting molten steel are casting continuously to form slab, the chemical component composition and its quality percentage of slab
Content are as follows: C:0.08~0.10%, Si:0.17~0.20%, Mn:0.40~0.49%, P:0.010~0.015%, S≤
0.005%, Cr:0.90~1.00%, Mo:0.25~0.30%, V:0.15~0.25%, Ni≤0.20%, Nb≤0.05%,
Cu≤0.20%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, surplus are Fe and inevitable impurity；Continuous casting
Base section: wide 200~330mm, long 1200~2400mm.
The chemical component mechanism of action of the present invention:
The steel plate trade mark of the present invention is that 12Cr1MoV adds vanadium chrome molybdenum steel plate, as a kind of Hi-Stren steel, the steel
Joined a variety of alloying elements such as chromium, molybdenum, vanadium, niobium, main purpose be generate solution strengthening, and obtain they carbide,
The precipitates such as nitride or carbonitride generate dispersion-strengthened action, to improve the mechanical performance of steel and anti-hydrogen embrittlement, anticorrosive
Etc. abilities.
Chromium is epochmaking alloying element in heat resisting steel and alloy.It can be improved the intensity and hardness of steel, stable carbide,
It prevents carbide from decomposing, and weakens diffusion of the carbon in ferrite, reduce the aggregation velocity of carbide.Unfavorable aspect:
Chromium significantly improves the ductile-brittle transition temperature of steel, and chromium can promote steel belt roof bolt brittleness.
Molybdenum has solution strengthening effect to ferrite, while can also improve the stability of carbide, therefore produces to the intensity of steel
Raw advantageous effect；Molybdenum reduces γ-Fe phase region, expands α-Fe phase region, and be carbide, is to improve heat resistance most to have
The alloying element of effect is dissolved into the self-diffusion for inhibiting iron in parent metal significantly, improves the recrystallization temperature of steel, strong to improve
Ferrite effectively inhibits the aggregation of cementite at 450-600 DEG C to the drag of creep, promotes the alloy carbide analysis of disperse shape
Out, invigoration effect is played；The excellent tiny carbide of molybdenum forming properties can improve steel resistant to hydrogen corrosiveness at high temperature under high pressure, molybdenum
The harden ability of steel can be greatly improved, and eliminates the red brittleness and temper brittleness of steel.Ill-effect is to send out low-alloy molybdenum steel
Raw graphitization tendency.
Vanadium and carbon, nitrogen, oxygen have extremely strong binding force, stable carbide, nitride are formed in steel, only in high temperature
It is lower to dissolve in austenite with just will be slow.The carbide and nitride of these vanadium usually exist with superfine small graininess, suppression
Growing up for the migration of crystal boundary and crystal grain in steel has been made, therefore steel is made still to keep the tissue of fine grain in higher temperature, greatly
The superheated susceptivity for reducing steel improves steel heat resistance and creep-resistant property.But when the mass fraction of vanadium is more than 1%,
Its declines, or even play opposite effect；The vanadium for being no less than the mass fraction of 5.7 times of carbon is added in steel, it can be by the carbon in steel
It is all fixed in V4C3, then considerably increases steel at high temperature under high pressure to the stability of hydrogen；Vanadium can significantly improve the low conjunction of low-carbon
The weldability of Jin Gang, vanadium can refine the as-cast structure of weld metal and reduce the superheated susceptivity of heat affected area, prevent heat affecting
The transition that the metal grain of line is closely melted in area is grown up and is roughened；Since vanadium secures a part of carbon, the harden ability of steel is reduced,
It can prevent from forming martensite or other harder tissues in heat affected area, keep heat affected zone hardness excessively high, plasticity and toughness are not
It can transition decline.
Niobium is the alloying element for reducing γ-Fe phase region, has certain solubility in α-Fe, niobium and carbon, nitrogen, oxygen have pole
Strong binding force, and extremely stable compound can be formed therewith, thus crystal grain can be refined, reduce the superheated susceptivity of steel and returned
Fiery brittleness；Since carbon can be firmly fixed, when mass percent is greater than 8 times of carbon content, it is capable of fixing almost all of carbon, is made
With fabulous resistant to hydrogen performance；Niobium improves the heat resistance of steel, improves croop property, can form disperse educt, equally distributed carbon
Compound；It joined the alloying elements such as chromium, molybdenum, vanadium in 12Cr1MoV steel, the main purpose that these elements are added is to generate solid solution by force
Change, and the precipitates such as carbide, nitride or carbonitride for obtaining them generate dispersion-strengthened action, to improve steel
Mechanical performance and the abilities such as anti-hydrogen embrittlement, anticorrosive.
Strengthening effect when microalloy element is used alone and several alloying elements are used in combination is for the meeting again of different steel grades
There is very big difference.
In view of alloying element is precipitated in the form of carbide during die welding, the solid solution strengthening effect of the steel is reduced,
Make steel plate maximum norm welding heat treated room temperature and elevated temperature strength surplus capacity to become smaller, it is contemplated that Si, P etc. have apparent solid solution strong
Change effect, therefore while guaranteeing steel plate resistance to brittleness energy, the solution strengthening elements content such as suitable control Si, P guarantees steel plate
Intensity after die welding.
Mentality of designing of the present invention:
It is smelted using electric arc furnaces or converter mode, the objectionable impurities elements content such as P, S is low, and steel is pure.And for continuous
The characteristics of formula heating furnace and steel grade feature develop multi-platform heating process, while guaranteeing that blank is uniformly kept the temperature, improve
The heating speed of blank has taken into account production efficiency and internal soundness while guaranteeing the surface quality of blank.Rolling process is adopted
It solves the problems, such as that coarse grains are uneven, impact flexibility is lower and hardness is higher with hot rolling+tempering heat treatment process, and rolls
Simple process, it is easily operated, it is suitable for the common steel plant production for having quenching press, normalizing furnace, outer machine furnace, car-bottom furnace.At setting up separately
Meter has been obtained by reasonable heat treatment process with more tiny tissue using Cr, Mo, V alloy elements compounding intensifying method
The steel plate of structure and the matched resistance to brittleness energy of good obdurability, while it being able to satisfy the requirement of soft again, the steel plate of production
Every mechanical performance index meets technical conditions requirement, and production cost significantly reduces.Meet under the steel plate condition of delivery compared with
The demand of soft can reduce the risk cracked when welding, can be effectively reduced the difficulty of equipment manufacturing manufacture；Steel plate
Cold-bending property it is good, material make when do not crack, steel plate template is good, can be widely used on petrochemical equipment.
12Cr1MoV of the present invention adds the product standard and method for testing performance canonical reference GB/T3077 of vanadium chrome molybdenum steel plate.
The beneficial effects of adopting the technical scheme are that the 1, present invention adds LF, VD using electric arc furnaces or converter
Mode is smelted, and in the few furnace charge of the selected harmful element of ingredient link, while being reinforced refining operation and is ensured the objectionable impurities elements such as P, S
Content is low, and steel is pure.2, heating process equipment is continuous heat-treating drier before the present invention rolls, and for continuous-type furnace
Feature and steel grade feature develop multi-platform heating process, while guaranteeing that blank is uniformly kept the temperature, improve the heating of blank
Speed has taken into account production efficiency and internal soundness while guaranteeing the surface quality of blank.3, the present invention uses hot rolling+tempering
Heat treatment process solve the problems, such as that coarse grains are uneven, impact flexibility is lower and hardness is higher, and rolling mill practice is simple, easily
In operation, it is suitable for the common steel plant production for having quenching press, normalizing furnace, outer machine furnace, car-bottom furnace.4, present component design is adopted
It has been obtained by reasonable heat treatment process with more tiny institutional framework with Cr, Mo, V alloy elements compounding intensifying method
With the matched resistance to brittleness energy steel plate of good obdurability, while it being able to satisfy the requirement of soft again, the steel plate items mechanics of production
Performance indicator meets technical conditions requirement, and production cost significantly reduces.5, the mechanical property of steel plate of the present invention: Rp0.2: 245~
400MPa, Rm:490~620MPa, A >=22%, K at -10 DEG Cv2>=54J, hardness number≤225HB.6, the present invention plus vanadium chrome-molybdenum steel
Plate meets the demand under the steel plate condition of delivery compared with soft, can reduce the risk cracked when welding, can be effectively reduced
The difficulty of equipment manufacturing manufacture；The cold-bending property of steel plate is good, and material does not crack when making, and steel plate template is good, can use extensively
In on petrochemical equipment.7,12Cr1MoV of the present invention adds the intensity of vanadium chrome molybdenum steel plate, yield tensile ratio moderate, and hardness is lower, and plasticity and toughness are good；
The generation for effectively reducing weld delayed crack and reheat crack(ing) expands its application range.
Detailed description of the invention
Fig. 1 is organization chart at the head thickness center of 1 steel plate maximum analog postwelding of embodiment；
Fig. 2 is organization chart at the head thickness center of 2 steel plate maximum analog postwelding of embodiment；
Fig. 3 is organization chart at the head thickness center of 3 steel plate maximum analog postwelding of embodiment；
Fig. 4 is organization chart at the head thickness center of 4 steel plate maximum analog postwelding of embodiment.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 40mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using electric arc furnaces mode, the tapping when molten steel temperature reaches 1600 DEG C；It is then fed into LF
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add according to de- S situation
The component requirements of vanadium chrome molybdenum steel plate, vacuumize process 30min, vacuum degree 30Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 280mm, long 2400mm；
(3) stewing steel technique, dress heating process: are executed after using multi-platform heating process, steel billet to be packed into continuous-type furnace
300 DEG C of steel temperature, turn off burner, with furnace Temperature fall 8h；400 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4h；Then with
75 DEG C/h speed rises to 930 DEG C, keeps the temperature 6h；1250 DEG C are risen to 75 DEG C/h speed again, keeps the temperature 8h；Then with 75 DEG C/h speed drop
To 1230 DEG C, 6h is kept the temperature；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1050 DEG C, draught per pass 15%, finishing temperature
910℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 700 DEG C, tempering insulation time 140min, heat preservation
Air-cooled finished product steel plate afterwards.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
1 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 2；At the head thickness center of steel plate maximum analog postwelding
Tissue is shown in Fig. 1.
The mechanical property of 1 embodiment of table, 1 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
2 embodiment of table, 1 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements, plasticity and toughness it can be seen from table 1, table 2 and Fig. 1
It is good；Crystal grain is superfine, organizes as ferrite+tempering bainite.
Embodiment 2
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 80mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1610 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 35min, vacuum degree 50Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 200mm, long 1800mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
280 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 9h；410 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 5h；Then
940 DEG C are risen to 70 DEG C/h speed, keeps the temperature 7h；1240 DEG C are risen to 65 DEG C/h speed again, keeps the temperature 7h；Then with 72 DEG C/h speed
1240 DEG C are down to, 7h is kept the temperature；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1100 DEG C, draught per pass 10%, finishing temperature
898℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 680 DEG C, tempering insulation time 280min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
3 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 4；At the head thickness center of steel plate maximum analog postwelding
Tissue is shown in Fig. 2.
The mechanical property of 3 embodiment of table, 2 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
4 embodiment of table, 2 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements, plasticity and toughness it can be seen from table 3, table 4 and Fig. 2
It is good；Crystal grain is superfine, organizes as ferrite+tempering bainite.
Embodiment 3
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 20mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using electric arc furnaces mode, the tapping when molten steel temperature reaches 1603 DEG C；It is then fed into LF
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add according to de- S situation
The component requirements of vanadium chrome molybdenum steel plate, vacuumize process 32min, vacuum degree 55Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 330mm, long 1200mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
270 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.4h；408 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.7h；
Then 933 DEG C are risen to 73 DEG C/h speed, keeps the temperature 6.4h；1247 DEG C are risen to 67 DEG C/h speed again, keeps the temperature 7.5h；Then with 71
DEG C/h speed is down to 1238 DEG C, keep the temperature 6.6h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1065 DEG C, draught per pass 12%, finishing temperature
904℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 687 DEG C, tempering insulation time 70min, heat preservation
Air-cooled finished product steel plate afterwards.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
5 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 6；At the head thickness center of steel plate maximum analog postwelding
Tissue is shown in Fig. 3.
The mechanical property of 5 embodiment of table, 3 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
6 embodiment of table, 3 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements, plasticity and toughness it can be seen from table 5, table 6 and Fig. 3
It is good.Crystal grain is superfine, organizes as ferrite+tempering bainite.
Embodiment 4
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 60mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1607 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 33min, vacuum degree 65Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 240mm, long 1600mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
240 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.8h；405 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.3h；
Then 936 DEG C are risen to 65 DEG C/h speed, keeps the temperature 6.8h；1242 DEG C are risen to 72 DEG C/h speed again, keeps the temperature 7.8h；Then with 72
DEG C/h speed is down to 1234 DEG C, keep the temperature 6.2h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1087 DEG C, draught per pass 20%, finishing temperature
920℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 684 DEG C, tempering insulation time 210min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
7 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 8；At the head thickness center of steel plate maximum analog postwelding
Tissue is shown in Fig. 4.
The mechanical property of 7 embodiment of table, 4 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
8 embodiment of table, 4 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements, plasticity and toughness it can be seen from table 7, table 8 and Fig. 4
It is good；Crystal grain is superfine, organizes as ferrite+tempering bainite.
Embodiment 5
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 50mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1605 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 31min, vacuum degree 42Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 220mm, long 2000mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
260 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.2h；402 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.5h；
Then 932 DEG C are risen to 68 DEG C/h speed, keeps the temperature 6.3h；1245 DEG C are risen to 70 DEG C/h speed again, keeps the temperature 7.2h；Then with 68
DEG C/h speed is down to 1235 DEG C, keep the temperature 6.5h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1072 DEG C, draught per pass 14%, finishing temperature
905℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 691 DEG C, tempering insulation time 175min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
9 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 10；At the head thickness center of steel plate maximum analog postwelding
Tissue is similar with Fig. 4, therefore omits.
The mechanical property of 9 embodiment of table, 5 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
10 embodiment of table, 5 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements it can be seen from table 9, table 10, and plasticity and toughness are good；This
The crystal grain of embodiment steel plate is superfine, organizes as ferrite+tempering bainite.
Embodiment 6
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 30mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1602 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 34min, vacuum degree 36Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 260mm, long 2200mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
230 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.5h；406 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.2h；
Then 935 DEG C are risen to 66 DEG C/h speed, keeps the temperature 6.5h；1249 DEG C are risen to 69 DEG C/h speed again, keeps the temperature 7.4h；Then with 70
DEG C/h speed is down to 1236 DEG C, keep the temperature 6.3h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1093 DEG C, draught per pass 17%, finishing temperature
913℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 685 DEG C, tempering insulation time 105min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
11 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 12；The head thickness center of steel plate maximum analog postwelding
It is similar with Fig. 4 to locate tissue, therefore omits.
The mechanical property of 11 embodiment of table, 6 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
12 embodiment of table, 6 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements it can be seen from table 11, table 12, and plasticity and toughness are good；
The crystal grain of the present embodiment steel plate is superfine, organizes as ferrite+tempering bainite.
Embodiment 7
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 70mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1606 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 32min, vacuum degree 47Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 310mm, long 1400mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
250 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.7h；403 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.6h；
Then 937 DEG C are risen to 72 DEG C/h speed, keeps the temperature 6.2h；1243 DEG C are risen to 73 DEG C/h speed again, keeps the temperature 7.6h；Then with 65
DEG C/h speed is down to 1232 DEG C, keep the temperature 6.8h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1075 DEG C, draught per pass 18%, finishing temperature
915℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 694 DEG C, tempering insulation time 245min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
13 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 14；The head thickness center of steel plate maximum analog postwelding
It is similar with Fig. 4 to locate tissue, therefore omits.
The mechanical property of 13 embodiment of table, 7 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
14 embodiment of table, 7 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements it can be seen from table 13, table 14, and plasticity and toughness are good；
The crystal grain of the present embodiment steel plate is superfine, organizes as ferrite+tempering bainite.
Embodiment 8
The present embodiment 12Cr1MoV adds vanadium chrome molybdenum steel plate thickness to be 56mm, and chemical component composition and mass percentage are shown in
Table 17.
The present embodiment 12Cr1MoV adds the production method of vanadium chrome molybdenum steel plate to include smelting, continuous casting, heating, rolling and heat treatment
Process, specific process step are as described below:
(1) smelting procedure: being smelted using converter mode, the tapping when molten steel temperature reaches 1608 DEG C；It is then fed into LF essence
Furnace refining 1h is refined, quick deoxidation finely tunes Mn, Mo, Ni, Cr, V content, make up to 12Cr1MoV and add vanadium according to de- S situation
The component requirements of chrome molybdenum steel plate, vacuumize process 36min, vacuum degree 61Pa after refining；
(2) continuous casting working procedure: smelting molten steel is casting continuously to form slab, and the chemical component composition and its mass percentage of slab are shown in Table
17；Cross Section of CC Billet: wide 270mm, long 1900mm；
(3) heating process: using multi-platform heating process, executes stewing steel technique after steel billet is packed into continuous-type furnace,
200 DEG C of steel loading temperature, turn off burner, with furnace Temperature fall 8.6h；409 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4.8h；
Then 938 DEG C are risen to 69 DEG C/h speed, keeps the temperature 6.7h；1241 DEG C are risen to 68 DEG C/h speed again, keeps the temperature 7.3h；Then with 73
DEG C/h speed is down to 1237 DEG C, keep the temperature 6.4h；
(4) rolling process: using hot rolling technology, and start rolling temperature is 1056 DEG C, draught per pass 13%, finishing temperature
915℃；
(5) heat treatment procedure: using tempering heat treatment, and tempering temperature is 682 DEG C, tempering insulation time 196min, protects
Air-cooled finished product steel plate after temperature.
12Cr1MoV obtained by the present embodiment adds the mechanical property of vanadium chrome molybdenum steel plate 1/2 position of plate thickness after Simulated post-weld heat treatment
15 can be shown in Table；Steel plate maximum die welding tissue and inclusion analysis result table 16；The head thickness center of steel plate maximum analog postwelding
It is similar with Fig. 4 to locate tissue, therefore omits.
The mechanical property of 15 embodiment of table, 8 steel plate, 1/2 position of plate thickness after Simulated post-weld heat treatment
16 embodiment of table, 8 steel plate maximum die welding tissue and inclusion analysis result
The mechanical property of the present embodiment steel plate is significantly larger than standard requirements it can be seen from table 15, table 16, and plasticity and toughness are good；
The crystal grain of the present embodiment steel plate is superfine, organizes as ferrite+tempering bainite.
17 embodiment 1-8 12Cr1MoV of table adds vanadium chrome molybdenum steel plate chemical component composition and mass percentage (%)
Ingredient surplus is Fe and inevitable impurity in table 17.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (9)
1. a kind of 12Cr1MoV adds vanadium chrome molybdenum steel plate, which is characterized in that the steel plate chemical component composition and its quality percentage contain
Amount are as follows: C:0.08~0.10%, Si:0.17~0.20%, Mn:0.40~0.49%, P:0.010~0.015%, S≤0.005%,
Cr:0.90~1.00%, Mo:0.25~0.30%, V:0.15~0.25%, Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb
≤ 0.003%, Sn≤0.010%, As≤0.010%, surplus are Fe and inevitable impurity.
2. a kind of 12Cr1MoV according to claim 1 adds vanadium chrome molybdenum steel plate, which is characterized in that the steel plate thickness is 20
~80mm.
3. a kind of 12Cr1MoV according to claim 1 adds vanadium chrome molybdenum steel plate, which is characterized in that the steel plate mechanical property
Can: Rp0.2: 245~400MPa, Rm:490~620MPa, A >=22%, K at -10 DEG Cv2≥54J；Hardness number≤225HB.
4. adding the production method of vanadium chrome molybdenum steel plate, feature based on a kind of 12Cr1MoV described in claim 1-3 any one
It is, the production method includes smelting, continuous casting, heating, rolling and heat treatment procedure；The heating process, continous way heating
Stove heating, using multi-platform heating process；The rolling process, using hot rolling technology, start rolling temperature is 1050~1100 DEG C；Institute
Heat treatment procedure is stated, using tempering heat treatment, tempering temperature is 680~700 DEG C.
5. the production method that a kind of 12Cr1MoV according to claim 4 adds vanadium chrome molybdenum steel plate, which is characterized in that described to add
Thermal process executes stewing steel technique, steel loading temperature≤300 after steel billet is packed into continuous-type furnace using multi-platform heating process
DEG C, turn off burner, with 8~9h of furnace Temperature fall；400~410 DEG C then are warming up to 70 DEG C/h speed, keeps the temperature 4~5h；Then
930~940 DEG C are risen to≤75 DEG C/h speed, keeps the temperature 6~7h；1240~1250 DEG C are risen to≤75 DEG C/h speed again, heat preservation 7
~8h；1230~1240 DEG C then are down to≤75 DEG C/h speed, keeps the temperature 6~7h.
6. the production method that a kind of 12Cr1MoV according to claim 4 adds vanadium chrome molybdenum steel plate, which is characterized in that described to roll
Process processed, using hot rolling technology, draught per pass >=10%, finishing temperature >=898 DEG C.
7. a kind of 12Cr1MoV according to claim 4-6 any one adds the production method of vanadium chrome molybdenum steel plate, feature
It is, the heat treatment procedure, using tempering heat treatment, tempering insulation time is 3.5*t minutes, and the t is the millimeter of steel plate
Thickness, air-cooled finished product steel plate after heat preservation.
8. a kind of 12Cr1MoV according to claim 4-6 any one adds the production method of vanadium chrome molybdenum steel plate, feature
It is, the smelting procedure is smelted using electric arc furnaces or converter mode, the tapping when molten steel temperature reaches 1600~1610 DEG C；
It is then fed into LF refining furnace refining 1h, quick deoxidation is finely tuned Mn, Mo, Ni, Cr, V content, made up to according to de- S situation
12Cr1MoV adds the component requirements of vanadium chrome molybdenum steel plate, vacuumize process >=30min, 30~65Pa of vacuum degree after refining.
9. a kind of 12Cr1MoV according to claim 4-6 any one adds the production method of vanadium chrome molybdenum steel plate, feature
It is, the continuous casting working procedure, smelting molten steel is casting continuously to form slab, the chemical component composition and its mass percentage of slab are as follows: C:
0.08~0.10%, Si:0.17~0.20%, Mn:0.40~0.49%, P:0.010~0.015%, S≤0.005%, Cr:0.90~
1.00%, Mo:0.25~0.30%, V:0.15~0.25%, Ni≤0.20%, Nb≤0.05%, Cu≤0.20%, Sb≤0.003%,
Sn≤0.010%, As≤0.010%, surplus are Fe and inevitable impurity；Cross Section of CC Billet: wide 200~330mm, long 1200
~2400mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110144518A (en) * | 2019-05-10 | 2019-08-20 | 舞阳钢铁有限责任公司 | A kind of high alloy American Standard container chrome molybdenum steel plate and its production method |
| CN111074049A (en) * | 2019-11-24 | 2020-04-28 | 舞阳钢铁有限责任公司 | Production process for reducing surface cracks of chromium-molybdenum alloy steel plate with high chromium content |
| CN114164376A (en) * | 2021-10-26 | 2022-03-11 | 南京钢铁股份有限公司 | Low-carbon peritectic steel continuous casting round billet for high-pressure boiler and manufacturing method thereof |
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| CN107099752A (en) * | 2017-03-23 | 2017-08-29 | 舞阳钢铁有限责任公司 | A kind of low-alloy 12Cr1MoV steel plates and its production method |
| CN108456827A (en) * | 2018-01-30 | 2018-08-28 | 舞阳钢铁有限责任公司 | A kind of modified adds vanadium chrome molybdenum steel plate and its production method |
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| CN104561801A (en) * | 2014-12-31 | 2015-04-29 | 南阳汉冶特钢有限公司 | Structural alloy steel 12CrMoV steel plate and production method thereof |
| CN107099752A (en) * | 2017-03-23 | 2017-08-29 | 舞阳钢铁有限责任公司 | A kind of low-alloy 12Cr1MoV steel plates and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110144518A (en) * | 2019-05-10 | 2019-08-20 | 舞阳钢铁有限责任公司 | A kind of high alloy American Standard container chrome molybdenum steel plate and its production method |
| CN111074049A (en) * | 2019-11-24 | 2020-04-28 | 舞阳钢铁有限责任公司 | Production process for reducing surface cracks of chromium-molybdenum alloy steel plate with high chromium content |
| CN114164376A (en) * | 2021-10-26 | 2022-03-11 | 南京钢铁股份有限公司 | Low-carbon peritectic steel continuous casting round billet for high-pressure boiler and manufacturing method thereof |
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