CN104791562A - F304/F304L double-standard stainless steel flange and production process thereof - Google Patents
F304/F304L double-standard stainless steel flange and production process thereof Download PDFInfo
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- CN104791562A CN104791562A CN201510145743.2A CN201510145743A CN104791562A CN 104791562 A CN104791562 A CN 104791562A CN 201510145743 A CN201510145743 A CN 201510145743A CN 104791562 A CN104791562 A CN 104791562A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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- 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
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- 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
- C21D6/00—Heat treatment of ferrous alloys
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The invention discloses an F304/F304L double-standard stainless steel flange. The F304/F304L double-standard stainless steel flange comprises a through hole and a flange plate. The flange plate is of a disc structure, the through hole is formed perpendicular to the flange plate with the center axis of the flange plate serving as the center line, and the edges of the two ends of the through hole are provided with a boss and a groove respectively. The flange plate comprises a front flange plate body, a middle flange plate body and a rear flange plate body which are sequentially arranged in parallel, the diameters of the front flange plate body, the middle flange plate body and the rear flange plate body are equal, the thicknesses of the front flange plate body and the rear flange plate body are equal, at least four fixing holes are evenly formed in each flange plate body, the hole diameters of the front fixing holes, the middle fixing holes and the rear fixing holes are equal, and the positions of the front fixing holes, the middle fixing holes and the rear fixing holes correspond. The invention further discloses a production process of the F304/F304L double-standard stainless steel flange. The F304/F304L double-standard stainless steel flange is high in rigidity and strength, resistant to corrosion, ingenious in structural design, high in practicality and long in service life.
Description
Technical field
The invention belongs to metal smelt technical field, relate to a kind of F304/F304L two mark stainless steel material flange and production technology thereof.
Background technique
In petrochemical industry is produced, various medium is very strong to the corrosivity of e-quipment and pipe, process system temperature, pressure is higher again, stainless steel F304 or F304L of the single trade mark used in current engineering respectively has pluses and minuses, F304 material at high temperature performance is better than F304L material, but intergranular corrosion resistance performance is not as F304L material, so seek not only intergranular corrosion resistance but also have good high-temperature behavior material to become difficult point in engineering.
The chemical composition of F304/304L material is consistent with F304L, and high-temperature behavior is consistent with F304, so just both has good intergranular corrosion resistance performance and good mechanical property.Flange is as the link of pipeline, so under high temperature corrosion working condition, F304/304L material flange just becomes desirable product, but because F304/304L material has the characteristic of bi-material concurrently, be not easy to forging, therefore the forging of the flange of F304/304L material just becomes an exploitation focus in industry.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of F304/F304L two mark stainless steel material flange and production technology thereof, product hardness of the present invention is high, intensity large, corrosion-resistant, smart structural design, practicability is high, long service life.
In order to solve above technical problem, the invention provides a kind of F304/F304L two mark stainless steel material flange, comprise through hole and flange plate, flange plate is disc-shaped structure, centered by the central shaft that through hole is arranged on flange plate, the vertical flange plate of line is arranged, the edges at two ends place of through hole is respectively equipped with boss and groove, flange plate comprises forward flange sheet, middle flange plate and rear flange sheet, and three be arranged in parallel successively, forward flange sheet, the equal diameters of middle flange plate and rear flange sheet, and forward flange sheet is identical with the thickness of rear flange sheet, it is evenly provided with at least 4 fixed holes respectively, front fixed hole, middle fixed hole and rear fixed hole, its pore size is equal and position is corresponding.
The technological scheme that the present invention limits further is:
The spacing of aforementioned forward flange sheet and middle flange plate, and middle flange plate is equal with the spacing of rear flange sheet.
The inclined-plane of aforementioned boss and groove and the angle of through hole center line are 30-60 °.
The present invention is rational in infrastructure, deft design, and pipe laying can be distinguished in flange two ends simultaneously, adopts bolt to fix, not only saves material, reduces costs, and good sealing effect, conveniently installs adjustment.
Further,
The present invention also provides the production technology of a kind of F304/F304L two mark stainless steel material flange, and process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 2950-3150 DEG C, alloy blank chemical composition and mass percent are: Cr:18.3-18.5%, Ni:9.1-9.3%, C:0.07-0.09%, Mo:0.21-0.25%, Cu:0.52-0.54%, Si:0.89-0.93%, Nb:0.14-0.16%, Ti:0.097-0.099%, Ca:0.15-0.17%, Se:0.05-0.15%, Te:0.15-0.19%, S:0.015-0.025%, P:0.021-0.023%, all the other are Fe and inevitable impurity,
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1050-1090 DEG C, and holding time is 5-7h, then forges, and forging method adopts open die forging, controlled forge process is than being 3.5-4.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 6-8 hour after normalizing, tempering is carried out after being incubated 3-5 hour after secondary normalizing, normalizing temperature is 890-900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Secondary normalizing temperature is 945-955 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Tempering temperature is 665-685 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
First refrigerating work procedure: first adopt water-cooled, with the cooling rate of 6-8 DEG C/s, alloy blank is cooled to 670-690 DEG C, then air cooling is to 510-530 DEG C, then adopts pressurized air or vaporific quenching liquid, with the cooling rate of 9-11 DEG C/s, alloy blank is cooled to room temperature;
Second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 10-12 DEG C/s, alloy blank is cooled to 610-620 DEG C, alloy blank is cooled to 450-470 DEG C by the air-cooled cooling rate with 8-10 DEG C/s of right employing, then adopts water-cooled, with the cooling rate of 4-6 DEG C/s, alloy blank is cooled to room temperature;
3rd refrigerating work procedure: first adopt the air-cooled cooling rate with 2-4 DEG C/s that alloy blank is cooled to 550-560 DEG C, adopt water-cooled, with the cooling rate of 7-9 DEG C/s, alloy blank is cooled to 350-360 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 3-5 DEG C/s, alloy blank is cooled to room temperature;
Heat treatment makes reversed austenite separate out in flake at martensite lath intergranular on the one hand, is evenly distributed; On the other hand, improve the thermostability of reversed austenite, thus make crystal boundary and matrix malleableize, can the low-temperature impact toughness of remarkable formulation orchid, obtain beyond thought technique effect.
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
The invention has the beneficial effects as follows:
In product of the present invention, Kohlenstoffgehalt 0.07-0.09%, does not only affect yield point and tensile strength, and plasticity and impact improve simultaneously, but also can improve the atmospheric corrosion resistance ability of steel; Silicone content 0.89-0.93%, as reducing agent and deoxidizing agent, can significantly improve the limit of elasticity of steel, yield point and tensile strength, and the combination such as silicon and molybdenum, tungsten, chromium, is improved corrosion resistance and oxidation resistant effect; Chromium content 18.3-18.5%, can significantly improve intensity, hardness and wear resistance, but reduces plasticity and toughness simultaneously, and can improve again oxidative stability and the corrosion resistance of steel; Nickel content 9.1-9.3%, can improve the intensity of steel, and keeps good plasticity and toughness, and nickel has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity; Molybdenum content 0.21-0.25%, molybdenum can make the grain refinement of steel, improves hardenability and thermostrength, keeps enough intensity and creep resisting ability, be combined with molybdenum, can improve mechanical property when high temperature, suppresses the fragility that alloyed steel causes due to fire; Ti content 0.097-0.099%, be strong deoxidizing agent in steel, it can make the dense internal organization of steel, crystal grain thinning power, reduces aging sensitivity and cold shortness, improving welding property; Content of niobium 0.14-0.16%, can crystal grain thinning and reduce the superheated susceptivity of steel and temper brittleness, improves intensity, can improving welding property, can prevent intergranular corrosion phenomenon; Copper content 0.52-0.54%, improves intensity and toughness, particularly atmospheric corrosion performance.
Heat treatment of the present invention makes reversed austenite separate out in flake at martensite lath intergranular on the one hand, is evenly distributed; On the other hand, improve the thermostability of reversed austenite, thus make crystal boundary and matrix malleableize, can the low-temperature impact toughness of remarkable formulation orchid, obtain beyond thought technique effect; Meanwhile, adopt the mode of open die forging, eliminate the defect such as shrinkage cavity and porosity, pore, make blank have higher mechanical property; By carrying out the solution treatment after the control of chemical analysis, the temperature of forging and forging ratio, forging, heat treatment to raw material, make the forging forged can adapt to use under sulfur-bearing and the higher working condition of phosphorus containing components, and there is good mechanical property, following mechanical property can be reached: tensile strength >=520MPa simultaneously; Extend >=38%; Brinell hardness 180 >=HB >=140; There is the performance of good intergranular corrosion resistance; The present invention is rational in infrastructure, deft design, and pipe laying can be distinguished in flange two ends simultaneously, adopts bolt to fix, not only saves material, reduces costs, and good sealing effect, conveniently installs adjustment.
Accompanying drawing explanation
Fig. 1 is plan view of the present invention;
Fig. 2 is sectional view of the present invention;
Wherein, 1-through hole, 2-boss, 3-forward flange sheet, fixed hole before 4-, flange plate in 5-, fixed hole in 6-, 7-rear flange sheet, fixed hole after 8-, 9-groove.
Embodiment
embodiment 1
The present embodiment provides a kind of F304/F304L two mark stainless steel material flange, structure is as Fig. 1, shown in Fig. 2, comprise through hole 1 and flange plate, flange plate is disc-shaped structure, centered by the central shaft that through hole 1 is arranged on flange plate, the vertical flange plate of line is arranged, the edges at two ends place of through hole 1 is respectively equipped with boss 2 and groove 9, flange plate comprises forward flange sheet 3, middle flange plate 5 and rear flange sheet 7, and three be arranged in parallel successively, forward flange sheet 3, the equal diameters of middle flange plate 5 and rear flange sheet 7, and forward flange sheet 3 is identical with the thickness of rear flange sheet 7, it is evenly provided with 4 fixed holes respectively, front fixed hole 4, middle fixed hole 6 and rear fixed hole 8, its pore size is equal and position is corresponding.
The spacing of aforementioned forward flange sheet 3 and middle flange plate 5, and middle flange plate 5 is equal with the spacing of rear flange sheet 7; Aforementioned boss 2 is 45 ° with the inclined-plane of groove 9 and the angle of through hole 1 center line.
embodiment 2
The present embodiment provides the production technology of a kind of F304/F304L two mark stainless steel material flange, and process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 2950 DEG C, and alloy blank chemical composition and mass percent are: Cr:18.3%, Ni:9.1%, C:0.07%, Mo:0.21%, Cu:0.52%, Si:0.89%, Nb:0.14%, Ti:0.097%, Ca:0.15%, Se:0.05%, Te:0.15%, S:0.015%, P:0.021%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1050 DEG C, and holding time is 7h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 3.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 6 hours after normalizing, tempering is carried out after being incubated 3 hours after secondary normalizing, normalizing temperature is 890 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Secondary normalizing temperature is 945 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Tempering temperature is 665 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
First refrigerating work procedure: first adopt water-cooled with the cooling rate of 6 DEG C/s, alloy blank to be cooled to 670 DEG C, then air cooling to 510 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 9 DEG C/s, alloy blank is cooled to room temperature;
Second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 10 DEG C/s, alloy blank is cooled to 610 DEG C, right employing is air-cooled is cooled to 450 DEG C with the cooling rate of 8 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 4 DEG C/s, alloy blank is cooled to room temperature;
3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 2 DEG C/s, alloy blank is cooled to 550 DEG C, adopt water-cooled, with the cooling rate of 7 DEG C/s, alloy blank is cooled to 350 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 3 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
embodiment 3
The present embodiment provides the production technology of a kind of F304/F304L two mark stainless steel material flange, and process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 3150 DEG C, and alloy blank chemical composition and mass percent are: Cr:18.5%, Ni:9.3%, C:0.09%, Mo:0.25%, Cu:0.54%, Si:0.93%, Nb:0.16%, Ti:0.099%, Ca:0.17%, Se:0.15%, Te:0.19%, S:0.025%, P:0.023%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1090 DEG C, and holding time is 5h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 4.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 8 hours after normalizing, tempering is carried out after being incubated 5 hours after secondary normalizing, normalizing temperature is 900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Secondary normalizing temperature is 955 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Tempering temperature is 685 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
First refrigerating work procedure: first adopt water-cooled with the cooling rate of 8 DEG C/s, alloy blank to be cooled to 690 DEG C, then air cooling to 530 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 11 DEG C/s, alloy blank is cooled to room temperature;
Second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 12 DEG C/s, alloy blank is cooled to 620 DEG C, right employing is air-cooled is cooled to 470 DEG C with the cooling rate of 10 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 6 DEG C/s, alloy blank is cooled to room temperature;
3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 4 DEG C/s, alloy blank is cooled to 560 DEG C, adopt water-cooled, with the cooling rate of 9 DEG C/s, alloy blank is cooled to 360 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 5 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
embodiment 4
The present embodiment provides the production technology of a kind of F304/F304L two mark stainless steel material flange, and process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 3050 DEG C, and alloy blank chemical composition and mass percent are: Cr:18.4%, Ni:9.2%, C:0.08%, Mo:0.23%, Cu:0.53%, Si:0.91%, Nb:0.15%, Ti:0.098%, Ca:0.16%, Se:0.10%, Te:0.17%, S:0.020%, P:0.022%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1070 DEG C, and holding time is 6h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 4, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 7 hours after normalizing, tempering is carried out after being incubated 4 hours after secondary normalizing, normalizing temperature is 900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Secondary normalizing temperature is 950 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Tempering temperature is 675 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
First refrigerating work procedure: first adopt water-cooled with the cooling rate of 7 DEG C/s, alloy blank to be cooled to 680 DEG C, then air cooling to 520 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 10 DEG C/s, alloy blank is cooled to room temperature;
Second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 11 DEG C/s, alloy blank is cooled to 620 DEG C, right employing is air-cooled is cooled to 460 DEG C with the cooling rate of 9 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 5 DEG C/s, alloy blank is cooled to room temperature;
3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 3 DEG C/s, alloy blank is cooled to 550 DEG C, adopt water-cooled, with the cooling rate of 8 DEG C/s, alloy blank is cooled to 350 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 4 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.
Claims (7)
1. F304/F304L two mark stainless steel material flange, comprise through hole (1) and flange plate, described flange plate is disc-shaped structure, centered by the central shaft that described through hole (1) is arranged on described flange plate, the vertical described flange plate of line is arranged, the edges at two ends place of described through hole (1) is respectively equipped with boss (2) and groove (9), it is characterized in that, described flange plate comprises forward flange sheet (3), middle flange plate (5) and rear flange sheet (7), and three be arranged in parallel successively, described forward flange sheet (3), the equal diameters of middle flange plate (5) and rear flange sheet (7), and forward flange sheet (3) is identical with the thickness of rear flange sheet (7), it is evenly provided with at least 4 fixed holes respectively, front fixed hole (4), middle fixed hole (6) and rear fixed hole (8), its pore size is equal and position is corresponding.
2. F304/F304L according to claim 1 two mark stainless steel material flange, it is characterized in that, the spacing of described forward flange sheet (3) and middle flange plate (5), and middle flange plate (5) is equal with the spacing of rear flange sheet (7).
3. F304/F304L according to claim 1 two mark stainless steel material flange, it is characterized in that, described boss (2) is 30-60 ° with the inclined-plane of groove (9) and the angle of through hole (1) center line.
4., based on the production technology of the two mark of the F304/F304L described in the arbitrary claim of claim 1-3 stainless steel material flange, it is characterized in that, process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 2950-3150 DEG C, described alloy blank chemical composition and mass percent are: Cr:18.3-18.5%, Ni:9.1-9.3%, C:0.07-0.09%, Mo:0.21-0.25%, Cu:0.52-0.54%, Si:0.89-0.93%, Nb:0.14-0.16%, Ti:0.097-0.099%, Ca:0.15-0.17%, Se:0.05-0.15%, Te:0.15-0.19%, S:0.015-0.025%, P:0.021-0.023%, all the other are Fe and inevitable impurity,
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1050-1090 DEG C, and holding time is 5-7h, then forges, and forging method adopts open die forging, controlled forge process is than being 3.5-4.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 6-8 hour after normalizing, tempering is carried out after being incubated 3-5 hour after secondary normalizing, described normalizing temperature is 890-900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Described secondary normalizing temperature is 945-955 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Described tempering temperature is 665-685 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
Described first refrigerating work procedure: first adopt water-cooled, with the cooling rate of 6-8 DEG C/s, alloy blank is cooled to 670-690 DEG C, then air cooling is to 510-530 DEG C, then adopts pressurized air or vaporific quenching liquid, with the cooling rate of 9-11 DEG C/s, alloy blank is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 10-12 DEG C/s, alloy blank is cooled to 610-620 DEG C, alloy blank is cooled to 450-470 DEG C by the air-cooled cooling rate with 8-10 DEG C/s of right employing, then adopts water-cooled, with the cooling rate of 4-6 DEG C/s, alloy blank is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt the air-cooled cooling rate with 2-4 DEG C/s that alloy blank is cooled to 550-560 DEG C, adopt water-cooled, with the cooling rate of 7-9 DEG C/s, alloy blank is cooled to 350-360 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 3-5 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
5. the production technology of F304/F304L according to claim 4 two mark stainless steel material flange, it is characterized in that, process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 2950 DEG C, and described alloy blank chemical composition and mass percent are: Cr:18.3%, Ni:9.1%, C:0.07%, Mo:0.21%, Cu:0.52%, Si:0.89%, Nb:0.14%, Ti:0.097%, Ca:0.15%, Se:0.05%, Te:0.15%, S:0.015%, P:0.021%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1050 DEG C, and holding time is 7h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 3.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 6 hours after normalizing, tempering is carried out after being incubated 3 hours after secondary normalizing, described normalizing temperature is 890 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Described secondary normalizing temperature is 945 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Described tempering temperature is 665 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
Described first refrigerating work procedure: first adopt water-cooled with the cooling rate of 6 DEG C/s, alloy blank to be cooled to 670 DEG C, then air cooling to 510 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 9 DEG C/s, alloy blank is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 10 DEG C/s, alloy blank is cooled to 610 DEG C, right employing is air-cooled is cooled to 450 DEG C with the cooling rate of 8 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 4 DEG C/s, alloy blank is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 2 DEG C/s, alloy blank is cooled to 550 DEG C, adopt water-cooled, with the cooling rate of 7 DEG C/s, alloy blank is cooled to 350 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 3 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
6. the production technology of F304/F304L according to claim 4 two mark stainless steel material flange, it is characterized in that, process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 3150 DEG C, and described alloy blank chemical composition and mass percent are: Cr:18.5%, Ni:9.3%, C:0.09%, Mo:0.25%, Cu:0.54%, Si:0.93%, Nb:0.16%, Ti:0.099%, Ca:0.17%, Se:0.15%, Te:0.19%, S:0.025%, P:0.023%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1090 DEG C, and holding time is 5h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 4.5, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 8 hours after normalizing, tempering is carried out after being incubated 5 hours after secondary normalizing, described normalizing temperature is 900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Described secondary normalizing temperature is 955 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Described tempering temperature is 685 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
Described first refrigerating work procedure: first adopt water-cooled with the cooling rate of 8 DEG C/s, alloy blank to be cooled to 690 DEG C, then air cooling to 530 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 11 DEG C/s, alloy blank is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 12 DEG C/s, alloy blank is cooled to 620 DEG C, right employing is air-cooled is cooled to 470 DEG C with the cooling rate of 10 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 6 DEG C/s, alloy blank is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 4 DEG C/s, alloy blank is cooled to 560 DEG C, adopt water-cooled, with the cooling rate of 9 DEG C/s, alloy blank is cooled to 360 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 5 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
7. the production technology of F304/F304L according to claim 4 two mark stainless steel material flange, it is characterized in that, process step is: melting-forging-heat treatment-trimming-ultrasound examination-sample analysis, wherein:
Melting: analyze qualified after, select the alloy blank of below 5000Kg, adopt vacuum arc remelting or electroslag remelting, smelting temperature is 3050 DEG C, and described alloy blank chemical composition and mass percent are: Cr:18.4%, Ni:9.2%, C:0.08%, Mo:0.23%, Cu:0.53%, Si:0.91%, Nb:0.15%, Ti:0.098%, Ca:0.16%, Se:0.10%, Te:0.17%, S:0.020%, P:0.022%, all the other are Fe and inevitable impurity;
Forging: the above-mentioned alloy blank through high melt is entered stove insulation, holding temperature is 1070 DEG C, and holding time is 6h, then forges, and forging method adopts open die forging, and controlled forge process ratio is 4, and scale removal, pre-shaping;
Heat treatment: the heat treatment process adopting normalizing-secondary normalizing-tempering, secondary normalizing is carried out after being incubated 7 hours after normalizing, tempering is carried out after being incubated 4 hours after secondary normalizing, described normalizing temperature is 900 DEG C, the first refrigerating work procedure is adopted to be chilled to room temperature, alloy blank is made to organize complete austenitizing, and fining austenite grains; Described secondary normalizing temperature is 950 DEG C, and adopt the second refrigerating work procedure to be chilled to room temperature, alloy blank obtains lath martensite tissue; Described tempering temperature is 675 DEG C, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, alloy blank obtains the tissue based on tempered sorbite, and the increasing number of reversed austenite in alloy blank is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed;
Described first refrigerating work procedure: first adopt water-cooled with the cooling rate of 7 DEG C/s, alloy blank to be cooled to 680 DEG C, then air cooling to 520 DEG C, then adopt pressurized air or vaporific quenching liquid, with the cooling rate of 10 DEG C/s, alloy blank is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled, with the cooling rate of 11 DEG C/s, alloy blank is cooled to 620 DEG C, right employing is air-cooled is cooled to 460 DEG C with the cooling rate of 9 DEG C/s by alloy blank, then adopts water-cooled, with the cooling rate of 5 DEG C/s, alloy blank is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the cooling rate of 3 DEG C/s, alloy blank is cooled to 550 DEG C, adopt water-cooled, with the cooling rate of 8 DEG C/s, alloy blank is cooled to 350 DEG C again, finally adopt pressurized air or vaporific quenching liquid, with the cooling rate of 4 DEG C/s, alloy blank is cooled to room temperature;
Detect and analyze: above-mentioned flange blank is cooled to room temperature, by the forging quality of its inside of ultrasound examination, and sampling is analyzed the mechanical property of forging, after above monitoring analysis is all qualified, collects for subsequent use by flange blank.
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| CN105598389A (en) * | 2016-01-19 | 2016-05-25 | 大丰市洪联铸钢有限责任公司 | Process for casting seal rainproof complex flanges |
| CN107387508A (en) * | 2017-07-11 | 2017-11-24 | 江苏盐发机械有限公司 | A kind of high pressure resistant flange and its production technology |
| CN107557697A (en) * | 2016-06-30 | 2018-01-09 | 郑州永通特钢有限公司 | A kind of sorbite stainless steel |
| CN110625050A (en) * | 2019-09-10 | 2019-12-31 | 南京宏擎精密材料科技有限公司 | Novel flange piece machining and forming process |
| CN111195809A (en) * | 2020-03-05 | 2020-05-26 | 捷而科电材（上海）有限公司 | Processing technology of neck-equipped welding neck flange |
| CN113953767A (en) * | 2021-11-05 | 2022-01-21 | 江苏浙瓯法兰有限公司 | Stainless steel flange suitable for low-temperature working condition and production process and device |
| CN113969379A (en) * | 2020-11-27 | 2022-01-25 | 纽威工业材料（苏州）有限公司 | Preparation method of CA15 steel |
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| CN111195809A (en) * | 2020-03-05 | 2020-05-26 | 捷而科电材（上海）有限公司 | Processing technology of neck-equipped welding neck flange |
| CN113969379A (en) * | 2020-11-27 | 2022-01-25 | 纽威工业材料（苏州）有限公司 | Preparation method of CA15 steel |
| CN113953767A (en) * | 2021-11-05 | 2022-01-21 | 江苏浙瓯法兰有限公司 | Stainless steel flange suitable for low-temperature working condition and production process and device |
| CN113953767B (en) * | 2021-11-05 | 2022-11-01 | 江苏浙瓯法兰有限公司 | Stainless steel flange suitable for low-temperature working condition and production process and device |
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