CN104174796A - Manufacturing method of stainless steel large forging for thermonuclear fusion reactor - Google Patents

Manufacturing method of stainless steel large forging for thermonuclear fusion reactor Download PDF

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CN104174796A
CN104174796A CN201410388287.XA CN201410388287A CN104174796A CN 104174796 A CN104174796 A CN 104174796A CN 201410388287 A CN201410388287 A CN 201410388287A CN 104174796 A CN104174796 A CN 104174796A
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forging
steel ingot
temperature
heating
ingot
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CN104174796B (en
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刘承志
姜周华
李花兵
尹嵬
李筱
张剑桥
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Northeastern University China
Shanxi Taigang Stainless Steel Co Ltd
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Northeastern University China
Shanxi Taigang Stainless Steel Co Ltd
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Abstract

The invention discloses a manufacturing method of a stainless steel large forging for a thermonuclear fusion reactor. The manufacturing method comprises the following steps: (1) preprocessing of a steel ingot; (2) heating of the steel ingot; (3) forging of the steel ingot; (4) twice upsetting forging and twice drawing out of the ingot; (5) shaping of the finished product; (6) heating processing of finished product forgings, wherein the finally obtained the stainless steel large forging is 300-1000 mm in thickness, 300-1800 mm in width and 500-2200 mm in length. The manufacturing method realizes that the grain size of the stainless steel large forging is greater than or equal to the second level, the depth of surface cracks of the stainless steel large forging is less than 1 mm, and the stainless steel large forging satisfies the quality requirement of the thermonuclear fusion reactor (the ITER Plan included).

Description

The production method of stainless steel heavy forging for a kind of thermonuclear fusion heap
Technical field
The present invention relates to a kind of production method of thermonuclear fusion heap stainless steel heavy forging, being specifically related to a kind of thermonuclear fusion heap thickness is the stainless steel forgings production method that 300-1000mm, width are 300-1800mm.
Background technology
ITER plan (the international thermonuclear experimental reactor of International Thermonuclear Experimental Reactor) is the Novel hot nuclear fusion experimental reactor project of European Union, the U.S., China, Japan, Russia, India, seven countries and regions' participation of Korea S.
The a large amount of thickness of this project demands exceedes 316LN, the 316L (N) of 300mm-IG stainless steel forgings product, and main stainless steel material composition is as follows:
Grade of steel: 316L(N)-IG, composition requires: C≤0.03%, Si≤0.75%, Mn≤2.00%, P≤0.03%, S≤0.01%, Cr 16.00%-18.00%, Ni 11.00%-14.00%, Mo 2.00%-2.50%, Co≤0.10%, N 0.06%-0.08%, Nb≤0.10%, Ta≤0.10%
Grade of steel: 316LN, composition requires: C≤0.03%, Si≤0.75%, Mn≤2.00%, P≤0.03%, S≤0.01%, Cr 16.00%-18.50%, Ni 10.00%-14.00%, Mo 2.00%-3.00%, Co≤0.10%, N 0.10%-0.22 %, Nb≤0.10%, Ta≤0.10%, (C+N) >=0.15%
Grade of steel: 316L, composition requires: C≤0.03%, Si≤0.75%, Mn≤2.00%, P≤0.03%, S≤0.01%, Cr 16.00%-18.50%, Ni 10.00%-14.00%, Mo 2.00%-3.00%, Co≤0.10%, N≤0.10%%, Nb≤0.10%, Ta≤0.10%
Adopt common Forging Technology to carry out the production of forging, 2 grades of the grain size < of forging, and face crack is more, more than crack depth reaches 2mm; Cannot meet the requirement of ITER to this forging grain size >=2 grade, and forging is because face crack needs turning amount larger deeply, causes production cost high, the problem that the delivery cycle is long.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention aims to provide a kind of production method of thermonuclear fusion heap stainless steel forgings, can realize stainless steel forgings grain size >=2 grade, and forging face crack degree of depth < 1mm, meet thermonuclear fusion heap (comprising ITER plan) quality requirement.The stainless steel forgings thickness 300-1000mm of thermonuclear fusion heap (the comprising ITER plan) use the present invention relates to; Width: 300-1800mm; Length 500-2200mm.
The production method of stainless steel heavy forging for a kind of thermonuclear fusion heap provided by the invention, comprises the steps:
(1) steel ingot pretreatment
Steel ingot requires: steel ingot is the one in billet, square ingot, octagon, hexagon ingot, and steel ingot needs the sawing portion that turns around, and the ratio of height after cutting away end to end and section circumscribed circle diameter is between 1.0-2.0;
(2) steel ingot heating process for the first time
Steel ingot enters heating furnace heating with cold ingot or band temperature steel ingot, is warmed up to 1210 ± 20 DEG C, is incubated 4 hours-8 hours, ensures that steel ingot inside, external temperature are grilled thoroughly, homogeneous, and temperature retention time is forged after reaching requirement;
Heating process for the first time, concrete operations are: steel ingot enters heating furnace heating with cold ingot or band temperature steel ingot, firing rate≤80 below 500 DEG C DEG C/h, firing rate≤150 within the scope of 500 DEG C-1100 DEG C DEG C/h, in the time of 1100 DEG C ± 20 DEG C, be incubated 3 hours-3.5 hours, ensure that steel ingot inside, external temperature are grilled thoroughly, homogeneous, temperature retention time reaches after requirement, be rapidly heated 1210 ± 20 DEG C, be incubated 4 hours-8 hours, after being wherein incubated 2 hours-2.5 hours, steel ingot overturns once, ensures that each heating-up temperature of steel ingot is consistent.
(3) steel ingot Forging Technology
Adopt flat-die forging technique, on hydrostatic forging machine, forge;
After steel ingot is come out of the stove, record steel ingot high/ratio≤1.8, footpath, first radially forge, every time forging deformation amount is controlled at the 2%-10% of steel ingot diameter, rotates steel ingot, multiple passages are forged, and steel ingot is forged into cylinder; After radial forging, control cylindrical height/cylinder diameter at 1.5-2.5;
After steel ingot is come out of the stove, record steel ingot high/footpath is than between 1.8-2.5, directly carries out following forging operation;
Jumping-up forges for the first time: cylinder steel ingot is erect and forged, and forging short transverse total deformation rate is controlled at the 35%-48% of steel ingot height; Measure surface of steel ingot temperature;
Pulling is for the first time forged: after jumping-up, again radially forge from steel ingot is original, rotate blank, every time forging deformation amount is controlled at the 2%-10% of steel ingot diameter, homogeneous deformation, is forged into cylinder, make forge after blank height/blank diameter at 1.5-2.5; Measure surface of steel ingot temperature;
In above forging process, forge the complete surface of steel ingot temperature that all needs to measure at every turn, when final forging temperature drops to 900-950 DEG C, stop forging, blank is delivered to heating furnace and carry out post bake; Surface of steel ingot temperature is when more than 950 DEG C, proceeds to forge;
Technique is pulled out in (four) two upsettings two:
After pulling, according to jumping-up Forging Technology requirement above, carry out jumping-up for the second time and forge: controlling deformation rate is: the 35%-45% that after distortion, steel ingot height is elemental height for the first time;
After secondary jumping-up, then according to above-mentioned pulling technological requirement, pull out for the second time forging, control deformation rate is: the blank height/blank diameter after forging is at 1.5-2.5;
In above forging process, forge the complete surface of steel ingot temperature that all needs to measure at every turn, when final forging temperature drops to 900-950 DEG C, stop forging, blank is delivered to heating furnace and carry out three heating; Surface of steel ingot temperature is when more than 950 DEG C, proceeds lower step finished product trimming;
(5) finished product shaping:
After two upsettings two are pulled out, forge along radial height direction, and make forging section rectangular or square, control the 2%-15% of every time deflection at finished size, repeatedly forge until within reaching finished product forging shape and the margin of tolerance;
(6) finished product forging Technology for Heating Processing:
Finished product after forging, enters heat-treatment furnace and heat-treats, and enters pond and be cooled fast to room temperature after coming out of the stove;
Described Technology for Heating Processing can adopt following two kinds of modes: (1) is in 30 minutes, packing heat-treatment furnace into processes, heat treatment heating-up temperature 1050-1150 DEG C, forging finished product thickness temperature retention time: 0.5-3 minute/millimeter of thickness, forging enters pond after coming out of the stove and is cooled fast to room temperature; (2) forge after forging cooling directly into pond after, reenter heat-treatment furnace and heat-treat, heat treatment heating-up temperature 1050-1150 DEG C, forging finished product thickness temperature retention time: 0.5-3 minute/millimeter of thickness, forging enters pond after coming out of the stove and is cooled fast to room temperature.
In such scheme, in described step (three) steel ingot Forging Technology, when steel ingot post bake: steel ingot for the second time heating-up temperature is 1160-1220 DEG C, temperature retention time is 2 hours-3 hours.
In such scheme, described step (four) two upsettings two are pulled out in technique, when three heating of steel ingot: steel ingot for the third time heating-up temperature is 1140-1200 DEG C, and temperature retention time is 2 hours-3 hours.
In above-mentioned forging process, the number of times that blank returns to heating furnace is controlled at 1-2 time; Be that steel ingot heats for the second time or heating for the third time in forging process.Can only heat at most three times, heating times is too much, can make the microstructure coarsening (being that grain size is thick) of forging.
The thickness of said method gained stainless steel heavy forging is 300-1000mm; Width is 300-1800mm; Length is 500-2200mm.
Of the present invention beneficial effect:
The thermonuclear fusion heap (comprising ITER plan) that the present invention produces can reach 2 grades or thinner by stainless steel forgings grain size, and face crack is little, even if there is the position of crackle, crack depth is also less than 2mm.
Detailed description of the invention
Further illustrate the present invention below by embodiment, but be not limited to following examples.
embodiment 1:
The type of stainless steel of the present embodiment is 316L(N)-IG.
Trimmed size: 450 -0 + 30× 1100 -0 + 50× 2193 0 + 50mm.
Finished product forging theoretical weight: 8.608 tons.
The step of the present embodiment is as follows successively:
(1) steel ingot pretreatment
Steel ingot size, type: Rotary-table steel ingot, lower cross section diameter is 1000mm, upper cross section diameter is 945mm, is highly height after 1807mm(crop end), height/diameter is than 1.8.
Steel ingot weight (after removing end to end): 11.100 tons.
Steel ingot chemical composition:
C: 0.012% Si:0.43% Mn:1.77% Cr:16.26%
Ni:13.77% P:0.016% S:0.002% N:751ppm
Mo:2.15% Co:0.03%, Nb:0.01%, Ta:0.010%
(2) Heating Steel Ingots
The first fire heating: steel ingot enters stove with cold ingot, below 500 DEG C, heats according to 50 DEG C of-60 DEG C of programming rates per hour.
500 DEG C-1100 DEG C time, firing rate, according to 110 DEG C of-120 DEG C of heating per hour, reaches 1100 DEG C, in the time of 1108 DEG C-1120 DEG C, is incubated 3 hours 7 minutes.
After insulation according to the firing rate of 180 DEG C per hour, be heated to 1210 DEG C, 1205-1214 DEG C of temperature range insulation, after 2 hours 10 minutes, steel is turned over once in steel ingot top and bottom, is again incubated within 2 hours 4 minutes, come out of the stove (total temperature retention time 4 hours 14 minutes) 1205-1214 DEG C of temperature range.
(3) forge
On 100MN hydraulic forging press, forge.
Steel ingot is first radially forging, and evenly rotates steel ingot, in diametric(al) homogeneous deformation, and deformation rate 3.7%-9.0% (the upper and lower size of steel ingot is different, and distortion is different), after-swage dimension is φ 910 × 2070mm, steel ingot ratio of height to diameter is 2.27.
Jumping-up forges for the first time: steel ingot is erect, and forges along short transverse, and point three distortion, make height become 1140mm(height total deformation rate 44.9% from 2070mm, and steel ingot becomes φ 1226 × 1140mm).Meter surface temperature is 1106 DEG C.
Pulling is for the first time forged: forge with mechanically actuated handgrip steel ingot 90-degree rotation, rotate vertically steel ingot, control every time and depress 10mm, be of a size of φ 986 × 1763mm after forging, ratio of height to diameter is 1.79.Meter surface temperature is 993 DEG C.
Technique is pulled out in (four) two upsettings two
Jumping-up forges for the second time: steel ingot is erect, and forges along short transverse, and distortion at twice, makes height become 1120mm(height total deformation rate 36.5% from 1763mm, and steel ingot becomes φ 1237 × 1120mm).977 DEG C of meter surface temperatures.
Pulling is for the second time forged: steel ingot 90-degree rotation forges, and rotates vertically steel ingot, controls every time and depress the 3.3%-5.6% of 15-25mm(finished size), after forging, cross dimensions is 620 × 1200mm.942 DEG C of meter surface temperatures.
Steel ingot returns heating furnace heating (two fire), is rapidly heated 1193 DEG C, is incubated the forging of coming out of the stove for 130 minutes.
(5) forging shaping:
Reduce cross dimensions direction and forge, control the 5%-15% of every time deflection at finished size, repeatedly forging and making 620 × 1200mm cross section deformation is 450 -0 + 30× 1100 -0 + 50mm.
(6) finished product forging Technology for Heating Processing
Within after forging 23 minutes, pack heat-treatment furnace into and process, heat-treatment furnace heating-up temperature 1060-1070 DEG C, forging finished product thickness temperature retention time: 273 minutes (0.6 minute/millimeter of thickness), come out of the stove and be cooled to room temperature into pond.
(7) forging detects
Forging in 3.5-4.5 level, meets thermonuclear fusion experimental reactor stainless steel forgings grain size >=2 grade and fluctuation the requirement of ± 1 grade according to ASTM A484/484M inspection grain size.
Forging surface flawless defect.
embodiment 2:
The type of stainless steel of the present embodiment is 316LN.
Trimmed size: 600 -0 + 30× 1500 -0 + 50× 1900 0 + 50mm.
Finished product forging theoretical weight: 13.56 tons.
The step of the present embodiment is as follows successively:
(1) steel ingot
Steel ingot size, type: Rotary-table steel ingot, lower cross section diameter 1200mm, height after upper cross section diameter 1135mm height 1850mm(crop end), height/diameter is than 1.58.
Steel ingot weight (after removing end to end): 15.70 tons.
Steel ingot chemical composition:
C:0.017% Si:0.50% Mn:1.51% Cr:16.15 %
Ni:12.43 % P:0.018% S:0.0012% N:1312ppm
Mo:2.08% Co:0.03%, Nb:0.01%, Ta:0.010%
(2) Heating Steel Ingots
The first fire heating: steel ingot enters stove with cold ingot, below 500 DEG C, heats according to 50 DEG C of-60 DEG C of programming rates per hour.
500 DEG C-1100 DEG C time, firing rate, according to 110 DEG C of-120 DEG C of heating per hour, reaches 1100 DEG C, is incubated 3 hours 18 minutes between in the time of 1108 DEG C-1120 DEG C.
After insulation according to the firing rate of 180 DEG C per hour, be heated to 1210 DEG C, 1203-1216 DEG C of temperature range insulation, after 2 hours 21 minutes, steel is turned over once in steel ingot top and bottom, again within 2 hours 11 minutes, comes out of the stove (32 points of total 4 hours heat times) 1203-1216 DEG C of temperature range insulation.
(3) forge
On 100MN hydraulic forging press, forge.
Steel ingot is first radially forging, and evenly rotates steel ingot, in diametric(al) homogeneous deformation, and deformation rate 3.08%-8.33% (the upper and lower size of steel ingot is different, and distortion is different), after-swage dimension is φ 1100 × 2084mm, steel ingot ratio of height to diameter is 1.89.
Jumping-up forges for the first time: steel ingot is erect, and forges along short transverse, and point three distortion, make height become 1250mm(height total deformation rate 40% from 2084mm, and steel ingot becomes φ 1420 × 1250mm).968 DEG C of meter surface temperatures.
Pulling is for the first time forged: forge with mechanically actuated handgrip steel ingot 90-degree rotation, rotate vertically steel ingot, control every time and depress 10mm, be of a size of φ 1060 × 2244mm, ratio of height to diameter 2.12 after forging.944 DEG C of meter surface temperatures.
Steel billet returns heating furnace and carries out post bake (two fire), is rapidly heated 1198 DEG C, is incubated the forging of coming out of the stove for 125 minutes.
Technique is pulled out in (four) two upsettings two
Jumping-up forges for the second time: steel ingot is erect, and forges along short transverse, and distortion at twice, makes height become 1450mm(height total deformation rate 35.4% from 2244mm, and steel ingot becomes φ 1318.7 × 1450mm).971 DEG C of meter surface temperatures.
Pulling is for the second time forged: steel ingot is toppled over 90 degree and fallen and forge, and along radially, controls every time and depress the 2.5%-4.2% of 15-25mm(finished size), to forge according to rectangular cross section shape, cross dimensions is 850 × 1520mm.948 DEG C of meter surface temperatures.
Steel billet returns heating furnace and carries out three heating (three fire), is rapidly heated 1155 DEG C, is incubated the forging of coming out of the stove for 128 minutes.
(5) forging shaping:
Reduce cross dimensions direction and forge, control the 5%-15% of every time deflection at finished size, repeatedly forge and make section 850 × 1520 be swaged to 600 -0 + 30× 1500 -0 + 50mm.
(6) finished product forging Technology for Heating Processing
After forging, enter pond and be cooled fast to room temperature, packing two days later heat-treatment furnace into processes, heat-treatment furnace heating-up temperature 1060-1070 DEG C, forging finished product thickness temperature retention time: 1230 minutes (2.05 minutes/millimeter of thickness), after processing, come out of the stove and be cooled to room temperature into pond.
(7) forging detects
Forging in 3.0-3.5 level, meets thermonuclear fusion experimental reactor stainless steel forgings grain size >=2 grade and fluctuation the requirement of ± 1 grade according to ASTM A484/484M inspection grain size.
There is crackle in bight, forging surface, crack depth is less than 0.3mm.
embodiment 3:
The type of stainless steel of the present embodiment is 316L.
Trimmed size: 450 -0 + 30× 1150 -0 + 50× 2100 -0 + 50mm.
Finished product forging theoretical weight: 8.62 tons.
The step of the present embodiment is as follows successively:
(1) steel ingot
Steel ingot size, type: octagon ingot, lower cross section diameter 1150mm, upper cross section diameter 1175mm, height after height 2230mm(crop end), height/diameter is than 2.0.
Steel ingot weight (after removing end to end): 18.65 tons.
Steel ingot chemical composition:
C:0.015% Si:0.48% Mn:1.62% Cr:16.32 %
Ni:12.50 % P:0.018% S:0.001% N:880ppm
Mo:2.11% Co:0.03%, Nb:0.01%, Ta:0.010%
(2) Heating Steel Ingots
The first fire heating: steel ingot enters stove with cold ingot, below 500 DEG C, heats according to 50 DEG C of-60 DEG C of programming rates per hour.
500 DEG C-1100 DEG C time, firing rate, according to 110 DEG C of-120 DEG C of heating per hour, reaches 1100 DEG C, is incubated 3 hours 01 minute between in the time of 1108 DEG C-1120 DEG C.
After insulation, according to the firing rate of 180 DEG C per hour, be heated to 1210 DEG C, 1203-1216 DEG C of temperature range insulation, after 2 hours 21 minutes, steel is turned over once in steel ingot top and bottom, again within 2 hours 13 minutes, comes out of the stove 1203-1216 DEG C of temperature range insulation.
(3) forge
On 100MN hydraulic forging press, forge.
Steel ingot ratio of height to diameter is 2.0, does not carry out radial forging, directly jumping-up.
Jumping-up forges for the first time: steel ingot is erect, and forges along short transverse, and point three distortion, make height become 1230mm(height total deformation rate 44.8% from 2230mm, and steel ingot becomes φ 1560 × 1230mm).968 DEG C of meter surface temperatures.
Pulling is for the first time forged: forge with mechanically actuated handgrip steel ingot 90-degree rotation, rotate vertically steel ingot, control every time and depress 10mm-25mm, be of a size of φ 1180 × 2150mm, ratio of height to diameter 1.82 after forging.935 DEG C of meter surface temperatures.
Steel billet returns heating furnace and carries out post bake (two fire), is rapidly heated 1195 DEG C, is incubated the forging of coming out of the stove for 125 minutes.
Technique is pulled out in (four) two upsettings two
Jumping-up forges for the second time: steel ingot is erect, and forges along short transverse, and distortion at twice, makes height become 1290mm(height total deformation rate 40% from 2150mm, and steel ingot becomes φ 1525 × 1290mm).991 DEG C of meter surface temperatures.
Pulling is for the second time forged: steel ingot is toppled over 90 degree and fallen and forge, and along radially, controls every time and depresses 15-20mm, forges according to rectangular cross section shape, and cross dimensions is 620 × 1520mm.948 DEG C of meter surface temperatures.
Steel billet returns heating furnace and carries out three heating (three fire), is rapidly heated 1155 DEG C, is incubated the forging of coming out of the stove for 128 minutes.
(5) forging shaping:
Reduce cross dimensions direction and forge, control the 5%-15% of every time deflection at finished size, repeatedly forge and make section 620 × 1520mm be swaged to 450 -0 + 30× 1150 -0 + 50mm.
(6) finished product forging Technology for Heating Processing
Within after forging 27 minutes, pack heat-treatment furnace into and process, heat-treatment furnace heating-up temperature 1060-1070 DEG C, forging finished product thickness temperature retention time: 315 minutes, come out of the stove and be cooled to room temperature into pond.
(7) forging detects
Forging in 3.5-4.0 level, meets thermonuclear fusion experimental reactor stainless steel forgings grain size >=2 grade and fluctuation the requirement of ± 1 grade according to ASTM A484/484M inspection grain size.
Forging surface flawless.

Claims (8)

1. a production method for stainless steel heavy forging for thermonuclear fusion heap, is characterized in that: comprise the steps:
(1) steel ingot pretreatment
Steel ingot requires: steel ingot is the one in billet, square ingot, octagon, hexagon ingot, and steel ingot needs the sawing portion that turns around, and the ratio of height after cutting away end to end and section circumscribed circle diameter is between 1.0-2.0;
(2) steel ingot heating process for the first time
Steel ingot enters heating furnace heating with cold ingot or band temperature steel ingot, is warmed up to 1210 ± 20 DEG C, is incubated 4 hours-8 hours, ensures that steel ingot inside, external temperature are grilled thoroughly, homogeneous, and temperature retention time is forged after reaching requirement;
(3) steel ingot Forging Technology
Adopt flat-die forging technique, on hydrostatic forging machine, forge;
After steel ingot is come out of the stove, record steel ingot high/ratio≤1.8, footpath, first radially forge, every time forging deformation amount is controlled at the 2%-10% of steel ingot diameter, rotates steel ingot, multiple passages are forged, and steel ingot is forged into cylinder; After radial forging, control cylindrical height/cylinder diameter at 1.5-2.5;
After steel ingot is come out of the stove, record steel ingot high/footpath is than between 1.8-2.5, directly carries out following forging operation;
Jumping-up forges for the first time: cylinder steel ingot is erect and forged, and forging short transverse total deformation rate is controlled at the 35%-48% of steel ingot height; Measure surface of steel ingot temperature;
Pulling is for the first time forged: after jumping-up, again radially forge from steel ingot is original, rotate blank, every time forging deformation amount is controlled at the 2%-10% of steel ingot diameter, homogeneous deformation, is forged into cylinder, make forge after blank height/blank diameter at 1.5-2.5; Measure surface of steel ingot temperature;
In above forging process, forge the complete surface of steel ingot temperature that all needs to measure at every turn, when final forging temperature drops to 900-950 DEG C, stop forging, blank is delivered to heating furnace and carry out post bake; Surface of steel ingot temperature is when more than 950 DEG C, proceeds to forge;
Technique is pulled out in (four) two upsettings two:
After pulling, according to jumping-up Forging Technology requirement above, carry out jumping-up for the second time and forge: controlling deformation rate is: the 35%-45% that after distortion, steel ingot height is elemental height for the first time;
After secondary jumping-up, then according to above-mentioned pulling technological requirement, pull out for the second time forging, control deformation rate is: the blank height/blank diameter after forging is at 1.5-2.5;
In above forging process, forge the complete surface of steel ingot temperature that all needs to measure at every turn, when final forging temperature drops to 900-950 DEG C, stop forging, blank is delivered to heating furnace and carry out three heating; Surface of steel ingot temperature is when more than 950 DEG C, proceeds lower step finished product trimming;
(5) finished product shaping:
After two upsettings two are pulled out, forge along radial height direction, and make forging section rectangular or square, control the 2%-15% of every time deflection at finished size, repeatedly forge until within reaching finished product forging shape and the margin of tolerance;
(6) finished product forging Technology for Heating Processing:
Finished product after forging, enters heat-treatment furnace and heat-treats, and enters pond and be cooled fast to room temperature after coming out of the stove.
2. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, it is characterized in that: described step (two) steel ingot heating process for the first time, concrete operations are: steel ingot enters heating furnace heating with cold ingot or band temperature steel ingot, firing rate≤80 below 500 DEG C DEG C/h, firing rate≤150 within the scope of 500 DEG C-1100 DEG C DEG C/h, in the time of 1100 DEG C ± 20 DEG C, be incubated 3 hours-3.5 hours, guarantee steel ingot inside, external temperature is grilled thoroughly, homogeneous, temperature retention time reaches after requirement, be rapidly heated 1210 ± 20 DEG C, be incubated 4 hours-8 hours, after being wherein incubated 2 hours-2.5 hours, steel ingot overturns once, ensure that each heating-up temperature of steel ingot is consistent.
3. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, it is characterized in that: in described step (three) steel ingot Forging Technology, when steel ingot post bake: steel ingot for the second time heating-up temperature is 1160-1220 DEG C, temperature retention time is 2 hours-3 hours.
4. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, it is characterized in that: described step (four) two upsettings two are pulled out in technique, when three heating of steel ingot: steel ingot for the third time heating-up temperature is 1140-1200 DEG C, and temperature retention time is 2 hours-3 hours.
5. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, is characterized in that: the number of times that described steel ingot blank returns to heating furnace is controlled at 1-2 time, and steel ingot only carries out post bake or three heating in forging process.
6. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, is characterized in that: the thickness of described stainless steel heavy forging is 300-1000mm; Width is 300-1800mm; Length is 500-2200mm.
7. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, it is characterized in that: in described step (six) finished product forging Technology for Heating Processing, heat treatment detailed process is: in 30 minutes, packing heat-treatment furnace into processes, heat treatment heating-up temperature 1050-1150 DEG C, forging finished product thickness temperature retention time: 0.5-3 minute/millimeter of thickness, forging enters pond after coming out of the stove and is cooled fast to room temperature.
8. the production method of stainless steel heavy forging for thermonuclear fusion heap according to claim 1, it is characterized in that: in described step (six) finished product forging Technology for Heating Processing, heat treatment detailed process is: after the rear forging of forging is cooling directly into pond, reentering heat-treatment furnace heat-treats, heat treatment heating-up temperature 1050-1150 DEG C, forging finished product thickness temperature retention time: 0.5-3 minute/millimeter of thickness, forging enters pond after coming out of the stove and is cooled fast to room temperature.
CN201410388287.XA 2014-08-08 2014-08-08 A kind of production method of thermonuclear fusion heap stainless steel heavy forging Active CN104174796B (en)

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CN105921704A (en) * 2016-06-22 2016-09-07 四川六合锻造股份有限公司 Method for reducing performance difference between head and tail of electroslag steel ingot
CN106077392A (en) * 2016-06-20 2016-11-09 安徽省瑞杰锻造有限责任公司 A kind of processing technique preventing loose tool eccentric up and down
CN106111875A (en) * 2016-06-20 2016-11-16 安徽省瑞杰锻造有限责任公司 A kind of Forging Technology of bent axle
CN106311943A (en) * 2015-06-30 2017-01-11 宝钢特钢有限公司 Method for producing hexagonal forge pieces through rapid forging press
CN106884127A (en) * 2017-02-09 2017-06-23 攀钢集团江油长城特殊钢有限公司 Low nitrogen steel material and its preparation method and application
CN107116167A (en) * 2017-07-12 2017-09-01 安徽凯密克企业管理咨询有限公司 A kind of forging technology of auto parts
CN107913962A (en) * 2017-12-05 2018-04-17 燕山大学 Suppress the method for large forgings hot forging face checking
CN109013744A (en) * 2018-08-08 2018-12-18 中国原子能科学研究院 A kind of manufacturing method of high silicon titanium-containing austenitic stainless steel material cladding tubes
CN109097678A (en) * 2018-08-08 2018-12-28 中国原子能科学研究院 A kind of manufacturing method of high silicon titanium-containing austenitic stainless steel material outer tube
CN109940120A (en) * 2019-04-10 2019-06-28 江阴振宏重型锻造有限公司 The production method of large-scale low-temperature irregular part
CN110029290A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 A kind of manufacturing method of ultralow temperature HIGH STRENGTH NON-MAGNETIC STAINLESS STEEL impeller shaft
CN110029289A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 The manufacturing method of superconduction nuclear fusion 316LN high-performance magnetism-free stainless steel
CN110125317A (en) * 2019-05-27 2019-08-16 钢铁研究总院 A kind of high-strength stainless steel Hot-rolled Rotary forming method
CN110527904A (en) * 2019-08-15 2019-12-03 洛阳双瑞特种装备有限公司 A kind of production method of long life high-voltage pump head body
CN112496216A (en) * 2020-11-23 2021-03-16 浙江天马轴承集团有限公司 Forging production process of 30Cr15MoN high-nitrogen martensitic stainless steel bar

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CN106311943A (en) * 2015-06-30 2017-01-11 宝钢特钢有限公司 Method for producing hexagonal forge pieces through rapid forging press
CN106077392A (en) * 2016-06-20 2016-11-09 安徽省瑞杰锻造有限责任公司 A kind of processing technique preventing loose tool eccentric up and down
CN106111875A (en) * 2016-06-20 2016-11-16 安徽省瑞杰锻造有限责任公司 A kind of Forging Technology of bent axle
CN105921704B (en) * 2016-06-22 2018-09-14 四川六合锻造股份有限公司 A method of reducing electroslag ingot performance difference end to end
CN105921704A (en) * 2016-06-22 2016-09-07 四川六合锻造股份有限公司 Method for reducing performance difference between head and tail of electroslag steel ingot
CN106884127A (en) * 2017-02-09 2017-06-23 攀钢集团江油长城特殊钢有限公司 Low nitrogen steel material and its preparation method and application
CN106884127B (en) * 2017-02-09 2019-02-26 攀钢集团江油长城特殊钢有限公司 Low nitrogen steel material and its preparation method and application
CN107116167A (en) * 2017-07-12 2017-09-01 安徽凯密克企业管理咨询有限公司 A kind of forging technology of auto parts
CN107913962A (en) * 2017-12-05 2018-04-17 燕山大学 Suppress the method for large forgings hot forging face checking
CN107913962B (en) * 2017-12-05 2019-05-28 燕山大学 Inhibit the method for large forgings hot forging face checking
CN109013744A (en) * 2018-08-08 2018-12-18 中国原子能科学研究院 A kind of manufacturing method of high silicon titanium-containing austenitic stainless steel material cladding tubes
CN109097678A (en) * 2018-08-08 2018-12-28 中国原子能科学研究院 A kind of manufacturing method of high silicon titanium-containing austenitic stainless steel material outer tube
CN110029290A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 A kind of manufacturing method of ultralow temperature HIGH STRENGTH NON-MAGNETIC STAINLESS STEEL impeller shaft
CN110029289A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 The manufacturing method of superconduction nuclear fusion 316LN high-performance magnetism-free stainless steel
CN109940120A (en) * 2019-04-10 2019-06-28 江阴振宏重型锻造有限公司 The production method of large-scale low-temperature irregular part
CN109940120B (en) * 2019-04-10 2020-07-31 江阴振宏重型锻造有限公司 Method for producing large low-temperature isomeric piece
CN110125317A (en) * 2019-05-27 2019-08-16 钢铁研究总院 A kind of high-strength stainless steel Hot-rolled Rotary forming method
CN110527904A (en) * 2019-08-15 2019-12-03 洛阳双瑞特种装备有限公司 A kind of production method of long life high-voltage pump head body
CN110527904B (en) * 2019-08-15 2021-03-19 洛阳双瑞特种装备有限公司 Manufacturing method of long-life high-pressure pump head body
CN112496216A (en) * 2020-11-23 2021-03-16 浙江天马轴承集团有限公司 Forging production process of 30Cr15MoN high-nitrogen martensitic stainless steel bar

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