CN108220543A - A kind of manufacturing process of 14Cr1Mo steel flanges forging - Google Patents
A kind of manufacturing process of 14Cr1Mo steel flanges forging Download PDFInfo
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- CN108220543A CN108220543A CN201711304919.XA CN201711304919A CN108220543A CN 108220543 A CN108220543 A CN 108220543A CN 201711304919 A CN201711304919 A CN 201711304919A CN 108220543 A CN108220543 A CN 108220543A
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- Prior art keywords
- forging
- 14cr1mo
- steel
- steel flanges
- manufacturing process
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- 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
- C21D2261/00—Machining or cutting being involved
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of manufacturing process of 14Cr1Mo steel flanges forging, is related to a kind of steel flange forge piece manufacturing process field, including step：1）14Cr1Mo steel flange forging is heated；2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 750 DEG C 830 DEG C；3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature, 14Cr1Mo steel flanges forging is cooled down again；4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
Description
Technical field
The invention belongs to flange forge piece technical field more particularly to a kind of manufacturing process of 14Cr1Mo steel flanges forging.
Background technology
Pressure vessel is one and is related to conglomerate, multi-disciplinary comprehensive product, and building technology is related to metallurgical, machinery
Numerous industries such as processing, corrosion and corrosion protection, non-destructive testing, security protection.Pressure vessel be widely used in chemical industry, oil, machinery,
The departments such as power, metallurgy, nuclear energy, Aeronautics and Astronautics, ocean.It is essential core equipment in production process, is a state
The important symbol of family's equipment manufacturing level.As in Chemical Manufacture reaction unit, heat-exchanger rig, the shell of separator, gas-liquid
Drum in basin, the pressure vessel of power producer, boiler of power plant system etc. is all pressure vessel.As metallurgical, machinery adds
The technologies such as work, welding and non-destructive testing are constantly progressive, particularly using computer technology as the hair at full speed of the information technology of representative
Exhibition, has driven the development of related industry, has been put into countries in the world on the basis of a large amount of manpower and materials progress in-depth studies, pressure
Force container technical field also achieves corresponding progress.In order to produce and using safer, more economical pressure vessel product, pass
Design, manufacture, welding and the method for inspection of system and are replaced by new technology, new process, new product to some extent.
But existing steel flange forging takes since working environment is in high temperature, high pressure, the place contacted with hydrogen
Labour condition is very severe, existing steel flange forging intensity is relatively low, plasticity and toughness is poor and anti-temper embrittlement poor-performing with
The problem of as adverse circumstances cannot be applicable in.
Invention content
In order to solve the above technical problem, the present invention provides a kind of manufacturing process of 14Cr1Mo steel flanges forging, solve steel
Flange forge piece intensity is low, plasticity is poor and the problem of poor toughness.
A kind of manufacturing process of 14Cr1Mo steel flanges forging, including step：
1）14Cr1Mo steel flange forging is heated；
2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 750 DEG C -830 DEG C；
3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature
14Cr1Mo steel flanges forging is cooled down again；
4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
Further, the 14Cr1Mo steel flanges forging progress machining processes after heat treatment include the following steps：
The first step：Roughing processing is carried out to the 14Cr1Mo steel flanges forging after heat treatment；
Second step：0.3-0.5 surpluses are carried out to roughing treated 14Cr1Mo steel flanges forging and do the processing of half smart car, and
There are 1 millimeter of allowances；
Third walks：14Cr1Mo steel flanges forging after double of smart car carries out the smart car processing of 0.2-0.3 surpluses；
Further, heat treatment mode using resistance stove heat or contacts electrical heating or salt bath stove heat, and at heating
Temperature is managed to carry out 280 DEG C -295 DEG C.
Further, temperature is increased to 980 DEG C during annealing, and temperature is down to 580 DEG C -610 with the speed of 60 DEG C/h after 25min
DEG C and maintain 2h ~ 3h, then 330 DEG C -280 DEG C are down to 90 DEG C/h.
Further, forging method uses active compacting forging method.
Further, 3）In soaking time for 5h ~ 7h, temperature is 198 DEG C ~ 205 DEG C.
Further, cooling uses the type of cooling of furnace cooling.
Further, the roughing amount of feeding is that 0.15 millimeter/turning -0.4 millimeter/turns in the first step, a diameter of 10 centimetres
Forging cutting depth is 0.5 millimeter -0.7 millimeter, and cutting speed is set as 50 ms/min -70 ms/min.
Compared with prior art, the present invention has the advantages that：
Workpiece heat → carry out forging in high temperature → anneal → cooling → be machined, enabling workpiece is made to exist
The characteristics of slowly being handled when being forged, and annealed in high temperature, it made to obtain high tenacity.
It is forged by active compacting forging method so that density increase of the workpiece in forging process can improve work
The intensity and hardness of part.
Specific embodiment
With reference to embodiment, the present invention will be further described and explanation, but the invention is not limited in any way.
Embodiment 1：A kind of manufacturing process of 14Cr1Mo steel flanges forging specifically includes following steps：
1）14Cr1Mo steel flange forging is heated；
2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 750 DEG C；
3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature
14Cr1Mo steel flanges forging is cooled down again；
4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
Wherein, machining processes include：
The first step：Roughing processing is carried out to the 14Cr1Mo steel flanges forging after heat treatment；
Second step：0.3 surplus is carried out to roughing treated 14Cr1Mo steel flanges forging and does the processing of half smart car, and there are 1
The allowance of millimeter；
Third walks：14Cr1Mo steel flanges forging after double of smart car carries out the smart car processing of 0.2 surplus；
Also, the mode of heat treatment heats temperature using resistance stove heat or contact electrical heating or salt bath stove heat
It spends to carry out 280 DEG C, moreover, temperature is increased to 980 DEG C during annealing, temperature is down to 580 DEG C simultaneously with the speed of 60 DEG C/h after 25min
2h is maintained, then 330 DEG C are down to 90 DEG C/h, forging method uses active compacting forging method, and 3）In soaking time for 5h, temperature
It is 198 DEG C, cools down the type of cooling using furnace cooling, the roughing amount of feeding is 0.15 millimeter/turn, a diameter of 10 centimetres in the first step
Forging cutting depth for 0.5 millimeter, cutting speed is set as 50 ms/min.
Embodiment 2
A kind of manufacturing process of 14Cr1Mo steel flanges forging specifically includes following steps：
1）14Cr1Mo steel flange forging is heated；
2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 830 DEG C；
3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature
14Cr1Mo steel flanges forging is cooled down again；
4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
Wherein, machining processes include：
The first step：Roughing processing is carried out to the 14Cr1Mo steel flanges forging after heat treatment；
Second step：0.5 surplus is carried out to roughing treated 14Cr1Mo steel flanges forging and does the processing of half smart car, and there are 1
The allowance of millimeter；
Third walks：14Cr1Mo steel flanges forging after double of smart car carries out the smart car processing of 0.3 surplus；
Also, the mode of heat treatment heats temperature using resistance stove heat or contact electrical heating or salt bath stove heat
It spends to carry out 295 DEG C, moreover, temperature is increased to 980 DEG C during annealing, temperature is down to 610 DEG C simultaneously with the speed of 60 DEG C/h after 25min
3h is maintained, then 280 DEG C are down to 90 DEG C/h, forging method uses active compacting forging method, and 3）In soaking time for 7h, temperature
It is 205 DEG C, cools down the type of cooling using furnace cooling, the roughing amount of feeding is 0.4 millimeter/turn, a diameter of 10 centimetres in the first step
Forging cutting depth for 0.7 millimeter, cutting speed is set as 70 ms/min.
Embodiment 3
A kind of manufacturing process of 14Cr1Mo steel flanges forging specifically includes following steps：
1）14Cr1Mo steel flange forging is heated；
2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 790 DEG C；
3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature
14Cr1Mo steel flanges forging is cooled down again；
4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
Wherein, machining processes include：
The first step：Roughing processing is carried out to the 14Cr1Mo steel flanges forging after heat treatment；
Second step：0.4 surplus is carried out to roughing treated 14Cr1Mo steel flanges forging and does the processing of half smart car, and there are 1
The allowance of millimeter；
Third walks：14Cr1Mo steel flanges forging after double of smart car carries out the smart car processing of 0.25 surplus；
Also, the mode of heat treatment heats temperature using resistance stove heat or contact electrical heating or salt bath stove heat
It spends to carry out 285 DEG C, moreover, temperature is increased to 980 DEG C during annealing, temperature is down to 590 DEG C simultaneously with the speed of 60 DEG C/h after 25min
2.5h is maintained, then 290 DEG C are down to 90 DEG C/h, forging method uses active compacting forging method, and 3）In soaking time for 5.5h,
Temperature is 200 DEG C, cooling using furnace cooling the type of cooling, in the first step roughing amount of feeding for 0.20 millimeter/turn, a diameter of 10
Centimetre forging cutting depth for 0.55 millimeter, cutting speed is set as 55 ms/min.
Specific embodiment
（One）14Cr1Mo steel flanges forging is implemented
First, the 14Cr1Mo steel flange forging of addition alloy element Al and Nb alloying elements is chosen, and it is carried out at heating
Reason；
Secondly, forging method is used to carry out 14Cr1Mo steel flange forging process for fuel for active compacting forging method；
Again, it is made annealing treatment after forging, the forge piece after annealing is kept the temperature, carried out pair with the mode of furnace cooling
Cooling after the heat treatment of 14Cr1Mo steel flanges forging.
Finally, forge piece after cooling is processed.
（Two）The requirement of 14Cr1Mo steel flange forging technology
（1）Smelting requirements：
Vacuum deaeration refining steel ingot should be used, to ensure to reach the requirement of material chemical composition, quenching degree, degree of purity, grain size；
A.14Cr1Mo steel forgings chemical analysis (%)：
B. grain size：
Prior austenite grain size >=3 grade；
C. field trash：
A, B, C, D and Ds be no more than 1.0 grades, and A+C is not more than 1.0 grades, and B+D+Ds is not more than 1.5 grades, and A+B+C+D+Ds≤
3.0 grade；
（2）Forging requirement：
A. nondestructive inspection requirement
Forging NB/T47008 standards requirement after fully forging；
B. mechanical property requirements
Forging is thermally treated and sample meet after simulating after welding treatment it is claimed below：
350~550MPa of tensile strength, yield strength >=200MPa, elongation percentage >=13%, shrinking percentage 25%, Akv (- 35 DEG C) >=
62J；
Simulated post-weld heat treatment system：
Maximum analog is heat-treated：520 ± 9 DEG C × 19 hours, minimum Analog heat-treating：520 ± 9 DEG C × 2 hours.
14Cr1Mo is one kind of heat resisting steel in 14Cr1Mo steel flanges forging of the present invention.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (8)
- A kind of 1. manufacturing process of 14Cr1Mo steel flanges forging, which is characterized in that the manufacture of this kind of 14Cr1Mo steel flange forging Technique specifically includes following steps：1）14Cr1Mo steel flange forging is heated；2）14Cr1Mo steel flanges forging after heat treatment is forged in the temperature between 750 DEG C -830 DEG C；3）It anneals to the 14Cr1Mo steel flange forging after forging, the 14Cr1Mo steel flange forging after annealing is kept the temperature 14Cr1Mo steel flanges forging is cooled down again；4）Machining processes are carried out to the 14Cr1Mo steel flanges forging after heat treatment.
- 2. the manufacturing process of 14Cr1Mo steel flanges forging according to claim 1, which is characterized in that 4）In, pair 14Cr1Mo steel flanges forging after heat treatment carries out machining processes and includes the following steps：The first step：Roughing processing is carried out to the 14Cr1Mo steel flanges forging after heat treatment；Second step：0.3-0.5 surpluses are carried out to roughing treated 14Cr1Mo steel flanges forging and do the processing of half smart car, and There are 1 millimeter of allowances；Third walks：14Cr1Mo steel flanges forging after double of smart car carries out the smart car processing of 0.2-0.3 surpluses.
- 3. the manufacturing process of 14Cr1Mo steel flanges forging according to claim 1, which is characterized in that 1）In, the heating Processing mode using resistance stove heat or contact electrical heating or salt bath stove heat, and heat treatment temperature for carry out 280 DEG C- 295℃。
- 4. the manufacturing process of the 14Cr1Mo steel flange forging according to claim 1 or 3, which is characterized in that 3）In, it is described Temperature is increased to 980 DEG C during annealing, and temperature is down to 580 DEG C -610 DEG C with the speed of 60 DEG C/h and maintains 2h ~ 3h after 25min, then 330 DEG C -280 DEG C are down to 90 DEG C/h.
- 5. the manufacturing process of 14Cr1Mo steel flanges forging according to claim 4, which is characterized in that 2）In, the forging Mode is made using active compacting forging method.
- 6. the manufacturing process of the 14Cr1Mo steel flange forging according to any one in claim 1,2,3,5, feature exist In described 3）In soaking time for 5h ~ 7h, temperature is 198 DEG C ~ 205 DEG C.
- 7. the manufacturing process of 14Cr1Mo steel flanges forging according to claim 6, which is characterized in that 3）In, described is cold But the type of cooling of furnace cooling is used.
- 8. the manufacturing process of 14Cr1Mo steel flanges forging according to claim 2, which is characterized in that 4）In, described The roughing amount of feeding is that 0.15 millimeter/turning -0.4 millimeter/turns in one step, and a diameter of 10 centimetres of forging cutting depth is 0.5 milli - 0.7 millimeter of rice, cutting speed is set as 50 ms/min -70 ms/min.
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| CN201711304919.XA CN108220543A (en) | 2017-12-11 | 2017-12-11 | A kind of manufacturing process of 14Cr1Mo steel flanges forging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540603A (en) * | 2022-02-23 | 2022-05-27 | 无锡宏达重工股份有限公司 | Manufacturing process of blowout preventer shell forging |
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| CN114540603A (en) * | 2022-02-23 | 2022-05-27 | 无锡宏达重工股份有限公司 | Manufacturing process of blowout preventer shell forging |
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Application publication date: 20180629 |