CN107760989A - Supercritical turbine septum valve valve disc manufacturing process - Google Patents

Supercritical turbine septum valve valve disc manufacturing process Download PDF

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Publication number
CN107760989A
CN107760989A CN201710941978.1A CN201710941978A CN107760989A CN 107760989 A CN107760989 A CN 107760989A CN 201710941978 A CN201710941978 A CN 201710941978A CN 107760989 A CN107760989 A CN 107760989A
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forging
incubated
heating furnace
furnace
warming
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CN107760989B (en
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万明珍
张斌
陈磊
范禹
张丽萍
马苏
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Zhangjiagang Zhonghuan Sea and Land High-end Equipment Co., Ltd.
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Zhangjiagang Hailu Annular Forging Co Ltd
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    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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  • Crystallography & Structural Chemistry (AREA)
  • Forging (AREA)

Abstract

The invention discloses supercritical turbine septum valve valve disc manufacturing process, its processing step are as follows：Heating → forging → annealing → rough turn descale → normalizing → isothermal annealing → Tempering and Quenching → finishing processing before blanking → forging.The septum valve valve disc manufactured using above-mentioned manufacturing process can reach following technical requirements：Tensile strength Rm（MPa）For 900~1050, yield strength Rp0.2（MPa）>=750, elongation percentage A（%）>=12, contraction percentage of area Z（%）>=40, hardness HB are 262~311, v-notch ballistic work（J）>=20, mean grain size is not coarser than specified in GB/T 6,394 2 grades；Microscopic structure is uniform tempered martensite, and most serious visual field delta ferrite level is less than 5%, and average delta ferrite level is less than 3%；Non-metallic inclusion meets following require：A：Thick system≤1.5, thin system≤1.5；B：Thick system≤1.5, thin system≤1.5；C：Thick system≤1.5, thin system≤1.5；D：Thick system≤1.5, thin system≤1.5；All kinds of summation≤3.5.

Description

Supercritical turbine septum valve valve disc manufacturing process
Technical field
The present invention relates to forged shaft to forge field, and in particular to supercritical turbine is manufactured with septum valve valve disc Technique.
Background technology
Septum valve is the important component of supercritical turbine valve group, it is now desired to the valve in septum valve The room-temperature mechanical property of dish need to reach following technical requirements：Tensile strength Rm（MPa）For 900~1050, yield strength Rp0.2 （MPa）>=750, elongation percentage A（%）>=12, contraction percentage of area Z（%）>=40, hardness HB are 262~311, v-notch ballistic work （J）≥20；But valve disc made from existing forged shaft manufacturing process is also unable to reach above-mentioned technical requirements.
The content of the invention
The technical problems to be solved by the invention are：A kind of supercritical turbine that can produce high request valve disc will be provided With septum valve valve disc manufacturing process.
In order to solve the above problems, the technical solution adopted in the present invention is:Supercritical turbine septum valve Valve disc manufacturing process, its processing step are as follows：Heating → forging → annealing → rough turn descale → normalizing before blanking → forging → isothermal annealing → Tempering and Quenching → finishing processing, is characterized in：
（1）In blanking：The steel material of selection is:Martensitic stain less steel X19CrMoNbVN11-1, its chemical composition require as follows：C： 0.17~0.23%, Si：≤0.50%、Mn ：0.40~0.90%, P： ≤0.020%、S： ≤0.015 %、Cr：10.00~ 11.50%、Mo：0.50~0.80%, Ni：0.20~0.60%, Cu：≤0.2%、V：0.10~0.30%, Al：≤0.020%、 Ti：≤0.020%、Sn：≤0.020%、Pb：≤0.005% 、N：0.050~0.10%, H：≤1.8ppm、O：≤20ppm；B： 0.008~0.012%；Steel material is smelted using basic electric furnace plus the technique of electroslag remelting；
（2）In being heated before forging：Steel billet obtained by blanking is lain against on the cushion block in heating furnace, and is with the surrounding of steel billet One circle low-temperature alloy forging, in-furnace temperature≤400 DEG C during billet-charging, is incubated 2~3h after the completion of shove charge；Then the burning of heating furnace Mouth is heated against low-temperature alloy steel so that in-furnace temperature is incubated after being warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed 3~4h, heating is then proceeded to so that in-furnace temperature is incubated 2~3h after being warming up to 1160 DEG C ± 10 DEG C with≤150 DEG C/h speed；
（3）In forging：Initial forging temperature≤1140 DEG C of steel billet, final forging temperature >=900 DEG C of steel billet；Before opening forging, work need to will be forged Dress is preheated to 200~300 DEG C, and then steel billet is pulled out successively, be upset, pulls out, is upset, then changes forging direction, edge Steel billet end face carries out down side, then round as a ball to steel billet progress chamfered edge, then carries out upset, pulling successively again to steel billet, so as to To forging, total forging ratio >=6 in forging process；
（4）In annealing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove is warming up to 870 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated A/50h, and A is smaller in the diameter and height of forging Person（Unit is millimeter）, being then shut off power supply makes forging be furnace-cooled to 150~250 DEG C, then blow-on door makes forging be air-cooled to room temperature 25 ~50 DEG C；
（5）In normalizing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove is warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated B/100h, and then heating furnace is again with≤100 DEG C/h Speed be warming up to 1050 DEG C ± 10 DEG C and be at least incubated B/50h, then heating furnace is warming up to 1100 with≤100 DEG C/h speed DEG C ± 10 DEG C and be at least incubated B/100h, B be forging diameter and height in smaller（Unit is millimeter）, then blow-on door make Forging is air-cooled to 25~50 DEG C of room temperature；
（6）In isothermal annealing：Heating furnace is at least incubated C/50h after being warming up to 980 DEG C ± 10 DEG C with≤180 DEG C/h speed, so Blow-on door is air-cooled to 680 ± 10 DEG C afterwards, is then at least incubated C/100h, and finally forging is taken out from heating furnace and is air-cooled to room temperature 25~50 DEG C, C is smaller in the diameter and height of forging（Unit is millimeter）；
（7）In Tempering and Quenching：Forging is first quenched, and then carries out double tempering, and forging is loaded on netted heat treatment tooling Quenched and be tempered in chase, quenching Step is as follows：The heat treatment tooling chase equipped with forging is positioned over heating furnace first In, in-furnace temperature≤400 DEG C during shove charge, then heating furnace be warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed and at least protect Warm D/200h, then heating furnace be warming up to 1050 DEG C ± 10 DEG C with≤100 DEG C/h speed again and be at least incubated D/50h, then Heating furnace is warming up to 1120 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated D/100h, then by the heat equipped with forging Processing frock chase is put into water cooling in clear water, and after 2~3 minutes, being transported to immediately in 30~40 DEG C of dielectric fluid is cooled to forging 250 DEG C ± 10 DEG C, then the heat treatment tooling chase equipped with forging is taken out from dielectric fluid makes forging return temperature to 300 DEG C ± 10 DEG C, then the heat treatment tooling chase equipped with forging, which is put into 30~40 DEG C of dielectric fluid, again makes forging be cooled to 80 DEG C ± 10 DEG C, the heat treatment tooling chase equipped with forging is finally taken out into air cooling from dielectric fluid makes forging be cooled to 50 DEG C ± 10 DEG C；The One time tempering step is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, in-furnace temperature during shove charge ≤ 400 DEG C, then heating furnace be warming up to 670 DEG C ± 10 DEG C with≤80 DEG C/h speed and be at least incubated D/25h, will then be equipped with The heat treatment tooling chase of forging, which is put into 30~40 DEG C of dielectric fluid, makes forging be air-cooled to room temperature after being cooled to 200 DEG C ± 10 DEG C 25~50 DEG C；Second of tempering step is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, shove charge When in-furnace temperature≤400 DEG C, then heating furnace be warming up to 670 DEG C ± 10 DEG C with≤80 DEG C/h speed and be at least incubated D/25h, Then blow-on door makes forging be air-cooled to 25~50 DEG C of room temperature；D is smaller in the diameter and height of forging（Unit is millimeter）.
Further, foregoing supercritical turbine septum valve valve disc manufacturing process, wherein：During forging, lead to Cross and pat that steel billet is cylindrical to be pulled out, pull out ratio >=1.5, each drafts of frock is controlled in 20~30mm；It is upset equal every time Completed using middle upsetting process, upset ratio >=2.25.
Further, foregoing supercritical turbine septum valve valve disc manufacturing process, wherein：In forging process The forging finally obtained need to be air-cooled to 630~660 DEG C, be then placed at least being incubated in the heating furnace that furnace temperature is 630~660 DEG C E/100h, E are smaller in the diameter and height of forging（Unit is millimeter）, then with≤40 DEG C/h cooling velocity furnace coolings To 25~50 DEG C of room temperature.
Advantages of the present invention is：Using supercritical turbine of the present invention septum valve valve disc manufacturing process The septum valve valve disc of manufacture can reach following technical requirements：Tensile strength Rm（MPa）For 900~1050, yield strength Rp0.2（MPa）>=750, elongation percentage A（%）>=12, contraction percentage of area Z（%）>=40, hardness HB are 262~311, v-notch punching Hit work(（J）>=20, mean grain size is not coarser than specified in GB/T 6,394 2 grades；Microscopic structure is uniform tempered martensite, Most serious visual field delta ferrite level is less than 5%, and average delta ferrite level is less than 3%, and microscopic structure is evaluated using GB/T 13299 Method, ferrite content use AMS2315F assessment methods；Non-metallic inclusion meets following require：A：Thick system≤1.5, thin system ≤1.5；B：Thick system≤1.5, thin system≤1.5；C：Thick system≤1.5, thin system≤1.5；D：Thick system≤1.5, thin system≤1.5；It is all kinds of Summation≤3.5；Ultrasound detection can reach as defined in NB/T 47013.3-2015 I grade, and Magnetic testing can reach NB/T 47013.4-2015 defined I grade.
Brief description of the drawings
Fig. 1 is the structural representation of septum valve valve disc of the present invention.
Embodiment
With reference to specific embodiments and the drawings, the present invention is described in further detail.
Supercritical turbine septum valve valve disc manufacturing process, its processing step are as follows：Add before blanking → forging Heat → forging → annealing → rough turn descale → normalizing → isothermal annealing → Tempering and Quenching → finishing processing；
（1）In blanking：The steel material of selection is:Martensitic stain less steel X19CrMoNbVN11-1, its chemical composition require as follows：C： 0.17~0.23%, Si：≤0.50%、Mn ：0.40~0.90%, P： ≤0.020%、S： ≤0.015 %、Cr：10.00~ 11.50%、Mo：0.50~0.80%, Ni：0.20~0.60%, Cu：≤0.2%、V：0.10~0.30%, Al：≤0.020%、 Ti：≤0.020%、Sn：≤0.020%、Pb：≤0.005% 、N：0.050~0.10%, H：≤1.8ppm、O：≤20ppm；B： 0.008~0.012%；Steel material is smelted using basic electric furnace plus the technique of electroslag remelting；Billet bloom size obtained by blanking be φ 600 × 675mm；
（2）In being heated before forging：Steel billet obtained by blanking is lain against on the cushion block in heating furnace, and is with the surrounding of steel billet One circle low-temperature alloy forging, in-furnace temperature≤400 DEG C during billet-charging, is incubated 2~3h after the completion of shove charge；Then the burning of heating furnace Mouth is heated against low-temperature alloy steel so that in-furnace temperature is incubated after being warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed 3~4h, heating is then proceeded to so that in-furnace temperature is incubated 2~3h after being warming up to 1160 DEG C ± 10 DEG C with≤150 DEG C/h speed；
（3）In forging：Initial forging temperature≤1140 DEG C of steel billet, final forging temperature >=900 DEG C of steel billet；Before opening forging, work need to will be forged Dress is preheated to 200~300 DEG C, then pulls out steel billet to φ 540 × 820, then that steel billet is upset to φ 700 × 480, then Steel billet is pulled out to φ 550 × 775, finally that steel billet is upset to φ 685 × 500, direction is forged in then change, along steel billet end face Side is carried out down, obtains the square steel billets that size is 790 × 480, then round as a ball to steel billet progress chamfered edge, it is φ 460 to obtain size × 1095 steel billet, it is then that steel billet is upset to φ 655 × 540, then steel billet is pulled out, obtain size for φ 530 × 824 forging；During forging, steel billet is cylindrical to be pulled out by patting, and each drafts of frock is controlled in 20~30mm；Every time It is upset to use middle upsetting process to complete；After forging process for fuel is completed, coarse grains and mixed crystal state be present, therefore be swaged into it After can not be placed directly in air and be air-cooled to room temperature, but 630~660 DEG C need to be air-cooled to, be then placed into furnace temperature as 630~660 DEG C heating furnace in be at least incubated 530/100=5.3h, room temperature 25~50 is then cooled to the furnace with≤40 DEG C/h cooling velocities ℃；The purpose for the arrangement is that prevent forging from causing to ftracture because structural transformation is uneven and internal stress is excessive；In forging, adopt Pulled out with two piers two and fall billet be because final products be axial workpiece, sampling direction be it is tangential, with forge direction differ Cause, to ensure product mechanical performance, it is necessary to carry out two piers two and pull out and side, so just can guarantee that product forging is saturating, it is ensured that product is each Directional performance is basically identical；
（4）In annealing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove is warming up to 870 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated 530/50=10.6h, and being then shut off power supply makes forging 150~250 DEG C are furnace-cooled to, then blow-on door makes forging be air-cooled to 25~50 DEG C of room temperature；
（5）Rough turn descale is carried out to forging, obtains the forging that size is φ 504 × 809；
（6）In normalizing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove with≤100 DEG C/h speed be warming up to 850 DEG C ± 10 DEG C and at least be incubated 504/100=5.04h, then heating furnace again with≤ 100 DEG C/h speed is warming up to 1050 DEG C ± 10 DEG C and is at least incubated 504/50=10.08h, and then heating furnace is with≤100 DEG C/h Speed be warming up to 1100 DEG C ± 10 DEG C and at least be incubated 504/100=5.04h, then blow-on door forging is air-cooled to room temperature 25 ~50 DEG C；
（7）In isothermal annealing：Heating furnace is warming up to after 980 DEG C ± 10 DEG C with≤180 DEG C/h speed and is at least incubated 504/50= 10.08h, then blow-on door be air-cooled to 680 ± 10 DEG C, 504/100=5.04h is then at least incubated, finally by forging from heating furnace Middle taking-up is air-cooled to 25~50 DEG C of room temperature；
（8）In Tempering and Quenching：Forging is first quenched, and then carries out double tempering, and forging is loaded on netted heat treatment tooling Quenched and be tempered in chase, forging be fitted into heat treatment tooling chase quenched and tempering be because forging be axle class Part, and temperature is very high when quenching, hook gear can not direct clamping forging, so needing forging loading heat treatment tooling iron Lifted in frame, and produced for convenience, forging does not just take out from heat treatment tooling chase during tempering；Quenching Step is such as Under：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, Ran Houjia Hot stove with≤100 DEG C/h speed be warming up to 850 DEG C ± 10 DEG C and at least be incubated 504/200=2.52h, then heating furnace again with ≤ 100 DEG C/h speed be warming up to 1050 DEG C ± 10 DEG C and at least be incubated 504/50=10.08h, then heating furnace with≤100 DEG C/ H speed is warming up to 1120 DEG C ± 10 DEG C and is at least incubated 504/100=5.04h, then by the heat treatment tooling iron equipped with forging Frame is put into water cooling in clear water, and after 2~3 minutes, being transported to immediately in 30~40 DEG C of dielectric fluid makes forging be cooled to 250 DEG C ± 10 DEG C, then the heat treatment tooling chase equipped with forging is taken out from dielectric fluid makes forging return temperature to 300 DEG C ± 10 DEG C, then again will Heat treatment tooling chase equipped with forging, which is put into 30~40 DEG C of dielectric fluid, makes forging be cooled to 80 DEG C ± 10 DEG C, finally will dress The heat treatment tooling chase for having forging takes out air cooling from dielectric fluid makes forging be cooled to 50 DEG C ± 10 DEG C；First time tempering step It is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then Heating furnace is warming up to 670 DEG C ± 10 DEG C with≤80 DEG C/h speed and is at least incubated 504/25=20.16h, and forging will be then housed Heat treatment tooling chase be put into 30~40 DEG C of dielectric fluid make forging be air-cooled to after being cooled to 200 DEG C ± 10 DEG C room temperature 25~ 50℃；Second of tempering step is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, stove during shove charge Interior temperature≤400 DEG C, then heating furnace with≤80 DEG C/h speed be warming up to 670 DEG C ± 10 DEG C and at least insulation 504/25= 20.16h, then blow-on door forging is air-cooled to 25~50 DEG C of room temperature；
（9）Smart car is carried out to forging, so as to obtain septum valve valve disc as shown in Figure 1.
The steel material that the present invention uses for martensitic stain less steel X19CrMoNbVN11-1, in quenching easily open by this kind of steel material Split, and can prevent steel material from being ftractureed in quenching after using manufacturing process of the present invention；In addition, the manufacturing process is to steel material Composition could be adjusted to improve product ballistic work：The content control of Ni first is reached the standard grade in, can improve intensity and can guarantor Hold good plasticity and toughness；Micro- B is added in steel can improve the compactness and hot rolling performance of steel, can improve strong Degree, but B easily scaling loss, therefore B content must be 0.10% or so in heating process.Further, since the ballistic work of product It is required that it is very high, it is also very high to the uniformity requirement of tissue, in order to reduce the content of retained austenite, the manufacturing process as far as possible Employ the first water cooling quenching mode that medium cools down again；The technique for employing double tempering simultaneously.Because product is axial workpiece And easily ftracture, so employing multiple pier pulls out technique.

Claims (3)

1. supercritical turbine septum valve valve disc manufacturing process, its processing step are as follows：Heated before blanking → forging → forging → annealing → rough turn descale → normalizing → isothermal annealing → Tempering and Quenching → finishing processing, it is characterised in that：
（1）In blanking：The steel material of selection is:Martensitic stain less steel X19CrMoNbVN11-1, its chemical composition require as follows：C： 0.17~0.23%, Si：≤0.50%、Mn ：0.40~0.90%, P： ≤0.020%、S： ≤0.015 %、Cr：10.00~ 11.50%、Mo：0.50~0.80%, Ni：0.20~0.60%, Cu：≤0.2%、V：0.10~0.30%, Al：≤0.020%、 Ti：≤0.020%、Sn：≤0.020%、Pb：≤0.005% 、N：0.050~0.10%, H：≤1.8ppm、O：≤20ppm；B： 0.008~0.012%；Steel material is smelted using basic electric furnace plus the technique of electroslag remelting；
（2）In being heated before forging：Steel billet obtained by blanking is lain against on the cushion block in heating furnace, and is with the surrounding of steel billet One circle low-temperature alloy forging, in-furnace temperature≤400 DEG C during billet-charging, is incubated 2~3h after the completion of shove charge；Then the burning of heating furnace Mouth is heated against low-temperature alloy steel so that in-furnace temperature is incubated after being warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed 3~4h, heating is then proceeded to so that in-furnace temperature is incubated 2~3h after being warming up to 1160 DEG C ± 10 DEG C with≤150 DEG C/h speed；
（3）In forging：Initial forging temperature≤1140 DEG C of steel billet, final forging temperature >=900 DEG C of steel billet；Before opening forging, work need to will be forged Dress is preheated to 200~300 DEG C, and then steel billet is pulled out successively, be upset, pulls out, is upset, then changes forging direction, edge Steel billet end face carries out down side, then round as a ball to steel billet progress chamfered edge, then carries out upset, pulling successively again to steel billet, so as to To forging, total forging ratio >=6 in forging process；
（4）In annealing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove is warming up to 870 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated A/50h, and A is smaller in the diameter and height of forging Person（Unit is millimeter）, being then shut off power supply makes forging be furnace-cooled to 150~250 DEG C, then blow-on door makes forging be air-cooled to room temperature 25 ~50 DEG C；
（5）In normalizing：Forging is positioned on the cushion block in heating furnace first, in-furnace temperature≤400 DEG C during shove charge, then heated Stove is warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated B/100h, and then heating furnace is again with≤100 DEG C/h Speed be warming up to 1050 DEG C ± 10 DEG C and be at least incubated B/50h, then heating furnace is warming up to 1100 with≤100 DEG C/h speed DEG C ± 10 DEG C and be at least incubated B/100h, B be forging diameter and height in smaller（Unit is millimeter）, then blow-on door make Forging is air-cooled to 25~50 DEG C of room temperature；
（6）In isothermal annealing：Heating furnace is at least incubated C/50h after being warming up to 980 DEG C ± 10 DEG C with≤180 DEG C/h speed, so Blow-on door is air-cooled to 680 ± 10 DEG C afterwards, is then at least incubated C/100h, and finally forging is taken out from heating furnace and is air-cooled to room temperature 25~50 DEG C, C is smaller in the diameter and height of forging（Unit is millimeter）；
（7）In Tempering and Quenching：Forging is first quenched, and then carries out double tempering, and forging is loaded on netted heat treatment tooling Quenched and be tempered in chase, quenching Step is as follows：The heat treatment tooling chase equipped with forging is positioned over heating furnace first In, in-furnace temperature≤400 DEG C during shove charge, then heating furnace be warming up to 850 DEG C ± 10 DEG C with≤100 DEG C/h speed and at least protect Warm D/200h, then heating furnace be warming up to 1050 DEG C ± 10 DEG C with≤100 DEG C/h speed again and be at least incubated D/50h, then Heating furnace is warming up to 1120 DEG C ± 10 DEG C with≤100 DEG C/h speed and is at least incubated D/100h, then by the heat equipped with forging Processing frock chase is put into water cooling in clear water, and after 2~3 minutes, being transported to immediately in 30~40 DEG C of dielectric fluid is cooled to forging 250 DEG C ± 10 DEG C, then the heat treatment tooling chase equipped with forging is taken out from dielectric fluid makes forging return temperature to 300 DEG C ± 10 DEG C, then the heat treatment tooling chase equipped with forging, which is put into 30~40 DEG C of dielectric fluid, again makes forging be cooled to 80 DEG C ± 10 DEG C, the heat treatment tooling chase equipped with forging is finally taken out into air cooling from dielectric fluid makes forging be cooled to 50 DEG C ± 10 DEG C；The One time tempering step is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, in-furnace temperature during shove charge ≤ 400 DEG C, then heating furnace be warming up to 670 DEG C ± 10 DEG C with≤80 DEG C/h speed and be at least incubated D/25h, will then be equipped with The heat treatment tooling chase of forging, which is put into 30~40 DEG C of dielectric fluid, makes forging be air-cooled to room temperature after being cooled to 200 DEG C ± 10 DEG C 25~50 DEG C；Second of tempering step is as follows：The heat treatment tooling chase equipped with forging is positioned in heating furnace first, shove charge When in-furnace temperature≤400 DEG C, then heating furnace be warming up to 670 DEG C ± 10 DEG C with≤80 DEG C/h speed and be at least incubated D/25h, Then blow-on door makes forging be air-cooled to 25~50 DEG C of room temperature；D is smaller in the diameter and height of forging（Unit is millimeter）.
2. supercritical turbine according to claim 1 septum valve valve disc manufacturing process, it is characterised in that：Forging When making, steel billet is cylindrical to be pulled out by patting, and pulls out ratio >=1.5, and each drafts of frock is controlled in 20~30mm；Every time It is upset to use middle upsetting process to complete, upset ratio >=2.25.
3. supercritical turbine according to claim 1 or 2 septum valve valve disc manufacturing process, its feature exist In：The forging finally obtained in forging process need to be air-cooled to 630~660 DEG C, be then placed into furnace temperature be 630~660 DEG C plus E/100h is at least incubated in hot stove, E is smaller in the diameter and height of forging（Unit is millimeter）, it is then cold with≤40 DEG C/h But speed cools to 25~50 DEG C of room temperature with the furnace.
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CN113510449A (en) * 2021-04-07 2021-10-19 中国重汽集团济南动力有限公司 Hard tooth surface axle wheel edge inclined inner gear ring and manufacturing method thereof
CN113510449B (en) * 2021-04-07 2024-03-19 中国重汽集团济南动力有限公司 Hard tooth surface axle wheel edge inclined annular gear and manufacturing method thereof
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CN114632901A (en) * 2022-03-18 2022-06-17 西安聚能高温合金材料科技有限公司 Preparation method of high-temperature alloy free forging bar blank for ultra-supercritical thermal power generating unit
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CN115094350B (en) * 2022-07-13 2023-01-24 江油市长祥特殊钢制造有限公司 Preparation method of nuclear power SA182F316L valve body forging

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