CN104004971A - Alloy material flange and forging technology thereof - Google Patents
Alloy material flange and forging technology thereof Download PDFInfo
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Abstract
The invention discloses an alloy material flange and a forging technology thereof. An alloy blank of the alloy material flange comprises, by weight, 12.7-12.9% of Ni, 25.3-25.5% of Cr, 0.1-0.12% of C, 0.17-0.19% of Si, 0.72-0.79% of Mn, 0.0015-0.0035% of S, 2.25-2.35% of Mo, 3.25-3.45% of Ti, 3-3.25% of Al, 1.25- 1.85% of Cu, 0.015-0.017% of P, 0.9-1.1% of W, 0.018-0.022% of B, 0.9-1.1% of Nb, 0.11-0.13% of rare earth elements and the balance Fe and impurities. The rare earth elements comprise 12-18% of Yb, 6-11% of Er, 19-25% of Dy, 16-26% of Gd, 8-17% of Ce, 13-18% of La and 15-22% of Th. Through raw material chemical analysis, forging temperature and forging ratio control, solid solution treatment after forging, heat treatment and structure hardening treatment after heat treatment, the forge piece can be used under the conditions of high sulphur and phosphorus content and has good mechanical properties. The alloy material has excellent stress corrosion cracking resistance, pitting corrosion resistance and crevice corrosion resistance, has good oxidizing and non-oxidizing hot acid resistance and has stable mechanical properties in a range of a room temperature to a high temperature of 550 DEG C.
Description
Technical field
The invention belongs to material processing field, relate to a kind of forging processing of alloy material, specifically a kind of alloy material flange and forging process thereof.
Background technology
In the continuous production of modern industry,, can inevitably there is leakage problem in the impact of the factor such as especially in petroleum chemical industry, under the effect of High Temperature High Pressure, flange is subject to dielectric corrosion, washes away, temperature, pressure, vibrations.Due to the error of trim finish size, sealing element the aging and seepage that the fastening reason such as improper very easily causes flange is installed.If can not administer in time flange leakage problems, under the washing away of medium, meeting expands rapidly seepage, causes the loss of material, and the destruction of production environment causes enterprise to shut down and stops production, and causes huge financial loss.If poisonous and harmful, inflammable and explosive dielectric leakage also likely cause the Serious Accidents such as personnel are poisoning, fire explosion.
Tradition solves the method for flange seepage for changing sealing element and smearing seal gum or change flange and pipeline, but the method has significant limitation, and the seepage having limits by the requirement of Working environment safety, cannot solve at scene.So seek corrosion resistant material, become difficult point and the emphasis in Practical Project technology.
Summary of the invention
Technical problem to be solved by this invention is, for overcoming the shortcoming of prior art, a kind of alloy material flange and forging process thereof are provided, this alloy material flange has excellent anticorrosion stress-resistant cracking performance, resistance to pitting attack, crevice corrosion behavior, there is good oxidation-resistance and non-oxidizable hot acid performance simultaneously, under the high temperature of room temperature to 550 ℃, can guarantee stable mechanical property.
In order to solve above technical problem, the invention provides a kind of alloy material flange, its weight percent chemical composition is: nickel 12.7-12.9%, chromium 25.3-25.5%, carbon 0.1-0.12%, silicon 0.17-0.19%, manganese 0.72-0.79%, sulphur 0.0015-0.0035%, molybdenum 2.25-2.35%, titanium 3.25-3.45%, aluminium 3-3.25%, copper 1.25-1.85%, phosphorus 0.015-0.017%, tungsten 0.9-1.1%, boron 0.018-0.022%, niobium 0.9-1.1%, rare earth element 0.11-0.13%, and all the other are Fe and impurity; Described rare earth element comprises ytterbium 12-18%, erbium 6-11%, dysprosium 19-25%, gadolinium 16-26%, cerium 8-17%, lanthanum 13-18% and thorium 15-22%.
The present invention also provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.7%, chromium 25.3%, carbon 0.1%, silicon 0.17%, manganese 0.72%, sulphur 0.0015%, molybdenum 2.25%, titanium 3.25%, aluminium 3%, copper 1.25%, phosphorus 0.015%, tungsten 0.9%, boron 0.018%, niobium 0.9%, rare earth element 0.11%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 6%, dysprosium 19%, gadolinium 26%, cerium 8%, lanthanum 14% and thorium 15%.
The present invention also provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.9%, chromium 25.5%, carbon 0.12%, silicon 0.19%, manganese 0.79%, sulphur 0.0035%, molybdenum 2.35%, titanium 3.45%, aluminium 3.25%, copper 1.85%, phosphorus 0.017%, tungsten 1.1%, boron 0.022%, niobium 1.1%, rare earth element 0.13%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 11%, dysprosium 19%, gadolinium 16%, cerium 8%, lanthanum 18% and thorium 16%.
The present invention also provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.8%, chromium 25.4%, carbon 0.11%, silicon 0.18%, manganese 0.76%, sulphur 0.0025%, molybdenum 2.30%, titanium 3.35%, aluminium 3.15%, copper 1.55%, phosphorus 0.016%, tungsten 1.0%, boron 0.020%, niobium 1.0%, rare earth element 0.12%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 8%, dysprosium 21%, gadolinium 16%, cerium 8%, lanthanum 13% and thorium 22%.
The technical scheme that the present invention further limits is:
The present invention also provides a kind of forging process of alloy material flange, comprises following concrete steps:
Step (1): first carry out chemical analysis with chemical analysis instrument alloy blank, guarantee that its Chemical Composition meets the composition requirement of above-mentioned alloy material;
Step (2): step (1) analyze qualified after, select the alloy billet below 5000Kg, adopt Electric furnace steel making, at 3500 ℃, blank is carried out to melting;
Step (3): the alloy billet through high melt in step (2) is entered to stove insulation at 940-980 ℃, forge scale removal, and premolding after insulation 3-6h;
Step (4): the premolding alloy billet that step (3) is obtained forges terminal moulding at 920-950 ℃, final forging temperature is controlled at more than 900 ℃, when lower than this temperature, must increase fire, controls forging ratio >=3;
Step (5): by the alloy billet trimming after terminal moulding in step (4), and the alloy billet after trimming is remained on to 3-6h at 1150-1180 ℃ of temperature;
Step (6): the alloy billet obtaining in step (5) is heat-treated, treatment process is solution treatment, equipment for Heating Processing adopts bell furnace, heat-treatment temperature range is 980-1200 ℃, soaking time is 25-35min, then alloy billet was cooled to 38-42 ℃ in 5 minutes, obtains flange blank;
Step (7): the flange blank after above-mentioned thermal treatment is carried out to structure hardening processing, the method of processing is: at 700-750 ℃, be incubated 8h, when then furnace cooling is to 600-650 ℃ of left and right, then this temperature range insulation 10 hours, in air, be cooled to subsequently room temperature;
Step (8): by its inner forging quality of ultrasound examination, and sampling analyzes the mechanical property of forging, after above monitoring analysis is all qualified, flange blank collected standby by the above-mentioned flange blank that is cooled to room temperature.
Further, the forging process of aforementioned alloy material flange, step is carried out trimming by the alloy billet after terminal moulding in (5), and excision amount is 25% of steel ingot gross weight; In step (6), alloy billet was cooled to 38-42 ℃ in 5 minutes, the method for cooling of employing is that alloy billet is put into fast and filled the pond that circulates current.
The invention has the beneficial effects as follows:
Of the present invention for the manufacture of containing chromium 25.3-25.5% in the alloy material of flange, wherein chromium plays anti-oxidant and anticorrosive effect, under 650～1000 ℃ of high temperature, have higher intensity and anti-oxidant, resistance to combustion gas corrosion ability, even can be at 1000～1100 ℃ of temperature life-time service; Cupric 1.25-1.85% wherein, molybdenum 2.25-2.35%, can improve the ability of resistance to various acid corrosion and stress corrosion; Wherein containing aluminium 3-3.25%, make alloy there is higher resistivity, lower temperature coefficient of resistivity and good solidity to corrosion, improve the oxidation-resistance of alloy material, high temperature strength.
Add the rare earth element of 0.11-0.13% in alloy material, can play refining, desulfurization, in and the effect of low melting point detrimental impurity, and can improve the processing characteristics of alloy, especially in nickelalloy, the physical and chemical performance of alloy be can improve to a great extent, and Alloy At Room Temperature and high-temperature mechanical property improved.
The present invention adopts the mode of flat-die forging, has eliminated the defects such as shrinkage cavity and porosity, pore, makes blank have higher mechanical property.
By the solution treatment, thermal treatment and the structure hardening afterwards that starting material are carried out after the temperature of chemical analysis, forging and the control of forging ratio, forging, process, the forging that makes to forge can adapt under sulfur-bearing and the higher working condition of phosphorus containing components and uses, and there is good mechanical property, can reach following mechanical property simultaneously:
1. flange room temperature tensile strength >=1275MPa;
2. flange high temp (250 ℃) tensile strength >=945MPa;
3. flange Brinell hardness HB >=330.
Embodiment
embodiment 1
The present embodiment provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.7%, chromium 25.3%, carbon 0.1%, silicon 0.17%, manganese 0.72%, sulphur 0.0015%, molybdenum 2.25%, titanium 3.25%, aluminium 3%, copper 1.25%, phosphorus 0.015%, tungsten 0.9%, boron 0.018%, niobium 0.9%, rare earth element 0.11%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 6%, dysprosium 19%, gadolinium 26%, cerium 8%, lanthanum 14% and thorium 15%.
The present embodiment also provides a kind of forging process of alloy material flange, comprises following concrete steps:
Step (1): first carry out chemical analysis with chemical analysis instrument alloy blank, guarantee that its Chemical Composition meets the composition requirement of above-mentioned alloy material;
Step (2): step (1) analyze qualified after, select the alloy billet of 5000Kg, adopt Electric furnace steel making, at 3500 ℃, blank is carried out to melting;
Step (3): the alloy billet through high melt in step (2) is entered to stove insulation at 940 ℃, forge scale removal, and premolding after insulation 6h;
Step (4): the premolding alloy billet that step (3) is obtained forges terminal moulding at 920 ℃, final forging temperature is controlled at more than 900 ℃, when lower than this temperature, must increase fire, and controlling forging ratio is 3;
Step (5): by the alloy billet trimming after terminal moulding in step (4), and the alloy billet after trimming is remained on to 6h at 1150 ℃ of temperature;
Step (6): the alloy billet obtaining in step (5) is heat-treated, and treatment process is solution treatment, equipment for Heating Processing adopts bell furnace, heat-treatment temperature range is 980 ℃, soaking time is 35min, then alloy billet is cooled to 38 ℃ in 5 minutes, obtains flange blank;
Step (7): the flange blank after above-mentioned thermal treatment is carried out to structure hardening processing, and the method for processing is: be incubated 8h at 700 ℃, then during furnace cooling to 600 ℃ left and right, then this temperature range insulation 10 hours, be cooled to subsequently room temperature in air;
Step (8): by its inner forging quality of ultrasound examination, and sampling analyzes the mechanical property of forging, after above monitoring analysis is all qualified, flange blank collected standby by the above-mentioned flange blank that is cooled to room temperature.
Wherein, step is carried out trimming by the alloy billet after terminal moulding in (5), and excision amount is 25% of steel ingot gross weight; In step (6), alloy billet was cooled to 38 ℃ in 5 minutes, the method for cooling of employing is that alloy billet is put into fast and filled the pond that circulates current.
embodiment 2
The present embodiment provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.9%, chromium 25.5%, carbon 0.12%, silicon 0.19%, manganese 0.79%, sulphur 0.0035%, molybdenum 2.35%, titanium 3.45%, aluminium 3.25%, copper 1.85%, phosphorus 0.017%, tungsten 1.1%, boron 0.022%, niobium 1.1%, rare earth element 0.13%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 11%, dysprosium 19%, gadolinium 16%, cerium 8%, lanthanum 18% and thorium 16%.
The present embodiment also provides a kind of forging process of alloy material flange, comprises following concrete steps:
Step (1): first carry out chemical analysis with chemical analysis instrument alloy blank, guarantee that its Chemical Composition meets the composition requirement of above-mentioned alloy material;
Step (2): step (1) analyze qualified after, select the alloy billet below 4800Kg, adopt Electric furnace steel making, at 3500 ℃, blank is carried out to melting;
Step (3): the alloy billet through high melt in step (2) is entered to stove insulation at 980 ℃, forge scale removal, and premolding after insulation 3h;
Step (4): the premolding alloy billet that step (3) is obtained forges terminal moulding at 950 ℃, final forging temperature is controlled at more than 900 ℃, when lower than this temperature, must increase fire, and controlling forging ratio is 3.2;
Step (5): by the alloy billet trimming after terminal moulding in step (4), and the alloy billet after trimming is remained on to 3h at 1180 ℃ of temperature;
Step (6): the alloy billet obtaining in step (5) is heat-treated, and treatment process is solution treatment, equipment for Heating Processing adopts bell furnace, heat-treatment temperature range is 1200 ℃, soaking time is 25min, then alloy billet is cooled to 42 ℃ in 5 minutes, obtains flange blank;
Step (7): the flange blank after above-mentioned thermal treatment is carried out to structure hardening processing, and the method for processing is: be incubated 8h at 750 ℃, then during furnace cooling to 650 ℃ left and right, then this temperature range insulation 10 hours, be cooled to subsequently room temperature in air;
Step (8): by its inner forging quality of ultrasound examination, and sampling analyzes the mechanical property of forging, after above monitoring analysis is all qualified, flange blank collected standby by the above-mentioned flange blank that is cooled to room temperature.
Wherein, step is carried out trimming by the alloy billet after terminal moulding in (5), and excision amount is 25% of steel ingot gross weight; In step (6), alloy billet was cooled to 42 ℃ in 5 minutes, the method for cooling of employing is that alloy billet is put into fast and filled the pond that circulates current.
embodiment 3
The present embodiment provides a kind of alloy material flange, select the weight percent chemical composition of alloy billet to be: nickel 12.8%, chromium 25.4%, carbon 0.11%, silicon 0.18%, manganese 0.76%, sulphur 0.0025%, molybdenum 2.30%, titanium 3.35%, aluminium 3.15%, copper 1.55%, phosphorus 0.016%, tungsten 1.0%, boron 0.020%, niobium 1.0%, rare earth element 0.12%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 8%, dysprosium 21%, gadolinium 16%, cerium 8%, lanthanum 13% and thorium 22%.
This present embodiment also provides a kind of forging process of alloy material flange, comprises following concrete steps:
Step (1): first carry out chemical analysis with chemical analysis instrument alloy blank, guarantee that its Chemical Composition meets the composition requirement of above-mentioned alloy material;
Step (2): step (1) analyze qualified after, select the alloy billet below 4600Kg, adopt Electric furnace steel making, at 3500 ℃, blank is carried out to melting;
Step (3): the alloy billet through high melt in step (2) is entered to stove insulation at 960 ℃, forge scale removal, and premolding after insulation 4.5h;
Step (4): the premolding alloy billet that step (3) is obtained forges terminal moulding at 930 ℃, final forging temperature is controlled at more than 900 ℃, when lower than this temperature, must increase fire, and controlling forging ratio is 3.5;
Step (5): by the alloy billet trimming after terminal moulding in step (4), and the alloy billet after trimming is remained on to 4.5h at 1170 ℃ of temperature;
Step (6): the alloy billet obtaining in step (5) is heat-treated, and treatment process is solution treatment, equipment for Heating Processing adopts bell furnace, heat-treatment temperature range is 1100 ℃, soaking time is 30min, then alloy billet is cooled to 40 ℃ in 5 minutes, obtains flange blank;
Step (7): the flange blank after above-mentioned thermal treatment is carried out to structure hardening processing, and the method for processing is: be incubated 8h at 720 ℃, then during furnace cooling to 630 ℃ left and right, then this temperature range insulation 10 hours, be cooled to subsequently room temperature in air;
Step (8): by its inner forging quality of ultrasound examination, and sampling analyzes the mechanical property of forging, after above monitoring analysis is all qualified, flange blank collected standby by the above-mentioned flange blank that is cooled to room temperature.
Wherein, step is carried out trimming by the alloy billet after terminal moulding in (5), and excision amount is 25% of steel ingot gross weight; In step (6), alloy billet was cooled to 40 ℃ in 5 minutes, the method for cooling of employing is that alloy billet is put into fast and filled the pond that circulates current.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection domain of the present invention.
Claims (7)
1. an alloy material flange, it is characterized in that, its weight percent chemical composition is: nickel 12.7-12.9%, chromium 25.3-25.5%, carbon 0.1-0.12%, silicon 0.17-0.19%, manganese 0.72-0.79%, sulphur 0.0015-0.0035%, molybdenum 2.25-2.35%, titanium 3.25-3.45%, aluminium 3-3.25%, copper 1.25-1.85%, phosphorus 0.015-0.017%, tungsten 0.9-1.1%, boron 0.018-0.022%, niobium 0.9-1.1%, rare earth element 0.11-0.13%, and all the other are Fe and impurity; Described rare earth element comprises ytterbium 12-18%, erbium 6-11%, dysprosium 19-25%, gadolinium 16-26%, cerium 8-17%, lanthanum 13-18% and thorium 15-22%.
2. alloy material flange according to claim 1, it is characterized in that, select the weight percent chemical composition of alloy billet to be: nickel 12.7%, chromium 25.3%, carbon 0.1%, silicon 0.17%, manganese 0.72%, sulphur 0.0015%, molybdenum 2.25%, titanium 3.25%, aluminium 3%, copper 1.25%, phosphorus 0.015%, tungsten 0.9%, boron 0.018%, niobium 0.9%, rare earth element 0.11%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 6%, dysprosium 19%, gadolinium 26%, cerium 8%, lanthanum 14% and thorium 15%.
3. alloy material flange according to claim 1, it is characterized in that, select the weight percent chemical composition of alloy billet to be: nickel 12.9%, chromium 25.5%, carbon 0.12%, silicon 0.19%, manganese 0.79%, sulphur 0.0035%, molybdenum 2.35%, titanium 3.45%, aluminium 3.25%, copper 1.85%, phosphorus 0.017%, tungsten 1.1%, boron 0.022%, niobium 1.1%, rare earth element 0.13%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 11%, dysprosium 19%, gadolinium 16%, cerium 8%, lanthanum 18% and thorium 16%.
4. alloy material flange according to claim 1, it is characterized in that, select the weight percent chemical composition of alloy billet to be: nickel 12.8%, chromium 25.4%, carbon 0.11%, silicon 0.18%, manganese 0.76%, sulphur 0.0025%, molybdenum 2.30%, titanium 3.35%, aluminium 3.15%, copper 1.55%, phosphorus 0.016%, tungsten 1.0%, boron 0.020%, niobium 1.0%, rare earth element 0.12%, all the other are Fe and impurity; Described rare earth element comprises ytterbium 12%, erbium 8%, dysprosium 21%, gadolinium 16%, cerium 8%, lanthanum 13% and thorium 22%.
5. a forging process for alloy material flange, is characterized in that, comprises following concrete steps:
Step (1): first carry out chemical analysis with chemical analysis instrument alloy blank, guarantee that its Chemical Composition meets the composition requirement of above-mentioned alloy material;
Step (2): step (1) analyze qualified after, select the alloy billet below 5000Kg, adopt Electric furnace steel making, at 3500 ℃, blank is carried out to melting;
Step (3): the alloy billet through high melt in step (2) is entered to stove insulation at 940-980 ℃, forge scale removal, and premolding after insulation 3-6h;
Step (4): the premolding alloy billet that step (3) is obtained forges terminal moulding at 920-950 ℃, final forging temperature is controlled at more than 900 ℃, when lower than this temperature, must increase fire, controls forging ratio >=3;
Step (5): by the alloy billet trimming after terminal moulding in step (4), and the alloy billet after trimming is remained on to 3-6h at 1150-1180 ℃ of temperature;
Step (6): the alloy billet obtaining in step (5) is heat-treated, treatment process is solution treatment, equipment for Heating Processing adopts bell furnace, heat-treatment temperature range is 980-1200 ℃, soaking time is 25-35min, then alloy billet was cooled to 38-42 ℃ in 5 minutes, obtains flange blank;
Step (7): the flange blank after above-mentioned thermal treatment is carried out to structure hardening processing, the method of processing is: at 700-750 ℃, be incubated 8h, when then furnace cooling is to 600-650 ℃ of left and right, then this temperature range insulation 10 hours, in air, be cooled to subsequently room temperature;
Step (8): by its inner forging quality of ultrasound examination, and sampling analyzes the mechanical property of forging, after above monitoring analysis is all qualified, flange blank collected standby by the above-mentioned flange blank that is cooled to room temperature.
6. the forging process of alloy material flange according to claim 5, is characterized in that, described step is carried out trimming by the alloy billet after terminal moulding in (5), and excision amount is 25% of steel ingot gross weight.
7. the forging process of alloy material flange according to claim 5, it is characterized in that, in described step (6), alloy billet was cooled to 38-42 ℃ in 5 minutes, the method for cooling of employing is that alloy billet is put into fast and filled the pond that circulates current.
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| CN104250711A (en) * | 2014-09-04 | 2014-12-31 | 卢岳 | Casting method for flange alloy material |
| CN104409185A (en) * | 2014-10-29 | 2015-03-11 | 中国船舶重工集团公司第七二五研究所 | Preparation method for copper-chromium alloy flange of upper insulator of electric locomotive |
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| CN107084288A (en) * | 2017-04-27 | 2017-08-22 | 无锡市华尔泰机械制造有限公司 | A kind of 316L stainless steel materials flange and its forging technology |
| CN107723611A (en) * | 2017-11-15 | 2018-02-23 | 曹安飞 | A kind of processing technology of valve Anti-corrosion flange |
| CN107893193A (en) * | 2017-11-15 | 2018-04-10 | 曹安飞 | A kind of processing technology of valve fire resisting flange |
| CN114700452A (en) * | 2022-04-12 | 2022-07-05 | 江苏升源锻造有限公司 | Efficient forging method of flange |
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| CN107084288A (en) * | 2017-04-27 | 2017-08-22 | 无锡市华尔泰机械制造有限公司 | A kind of 316L stainless steel materials flange and its forging technology |
| CN107723611A (en) * | 2017-11-15 | 2018-02-23 | 曹安飞 | A kind of processing technology of valve Anti-corrosion flange |
| CN107893193A (en) * | 2017-11-15 | 2018-04-10 | 曹安飞 | A kind of processing technology of valve fire resisting flange |
| CN114700452A (en) * | 2022-04-12 | 2022-07-05 | 江苏升源锻造有限公司 | Efficient forging method of flange |
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Inventor after: Li Zhongyun Inventor after: Huang Bingchen Inventor before: Li Zhongyun |