CN106623709A - Forging process of high-temperature corrosion-resisting flange forge piece - Google Patents

Forging process of high-temperature corrosion-resisting flange forge piece Download PDF

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Publication number
CN106623709A
CN106623709A CN201710176601.1A CN201710176601A CN106623709A CN 106623709 A CN106623709 A CN 106623709A CN 201710176601 A CN201710176601 A CN 201710176601A CN 106623709 A CN106623709 A CN 106623709A
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China
Prior art keywords
forging
temperature
heating
time period
workpiece
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CN201710176601.1A
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Chinese (zh)
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CN106623709B (en
Inventor
刘保林
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Cangzhou Long Pipe Equipment Co Ltd
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Cangzhou Long Pipe Equipment Co Ltd
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Priority to CN201710176601.1A priority Critical patent/CN106623709B/en
Priority claimed from CN201710176601.1A external-priority patent/CN106623709B/en
Publication of CN106623709A publication Critical patent/CN106623709A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/28Making machine elements wheels; discs
    • B21K1/32Making machine elements wheels; discs discs, e.g. disc wheels

Abstract

The invention provides a forging process of a high-temperature corrosion-resisting flange forge piece. The forging process comprises the following steps: adopting a process of multiple forgings is adopted according to materials of the forge piece; putting raw materials into an electric furnace and carrying out heating treatment by time periods; heating to the temperature of 350 DEG C-450 DEG C in the first time period; heating to the temperature of 350 DEG C-450 DEG C in the second time period; heating until the temperature is 900 DEG C-1000 DEG C in the third time period; keeping the temperature at 900 DEG C-1000 DEG C in the fourth time period; raising the temperature to 1200 DEG C-1400 DEG C in the fifth time period; keeping the temperature at 1200 DEG C-1400 DEG C in the sixth time period for three hours, and then discharging from the furnace and forging; in a forging process, stopping forging when a workpiece temperature is reduced to 1100 DEG C-1200 DEG C from 1200 DEG C-1400 DEG C; returning a workpiece back into the furnace and heating, wherein a heating process is the same as a primary forging heating process; and forging for the plurality of times. According to the process provided by the invention, the uniformity of inner and outer temperatures of the workpiece is effectively guaranteed, and a working temperature is accurate to be within +/-10, so that a working thermal contraction ratio is effectively guaranteed; and damages to the materials, caused by elements including sulfur and phosphorus and the like in a heating process of the materials, are avoided, and the service life of products is prolonged by 30% or more.

Description

The forging technology of high temperature is anti-corrosion flange forge piece
Technical field
The present invention relates to flange forge piece processing technique field, and in particular to a kind of forging work of high temperature is anti-corrosion flange forge piece Skill.
Background technology
Forged flange is the best a kind of product of mechanical performance in flange product, and its raw material are usually pole, then Constantly beaten again after being cut, to eliminate steel ingot in segregation, the defect such as loose.Price and mechanical property all compare The high class of common cast flange.Forged flange tradition forging method is that raw material is put in gas generator or gas furnace - 1400 ° of forgings of coming out of the stove of workpiece about 1200 ° are heated up to, by forging and molding of pneumatic hammer or board drop hammer, the workpiece for coming is forged Yield rate is about 70%, and metallographic structure analysis are the constituent content such as sulphur phosphorus in 2-3 grades of forging, and conventional forging process fuel It is too high, a certain degree of harm is caused to workpiece, cause the various materials'use life-spans to be greatly lowered
The content of the invention
The present invention is in view of the shortcomings of the prior art, there is provided a kind of forging technology of high temperature is anti-corrosion flange forge piece.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of forging technology of high temperature is anti-corrosion flange forge piece, adopts multiple forging technology, by former material according to the material of forging Material is put in electric furnace and carries out time segment heat treatment, and concrete technology step is as follows:
(1) first forging:Raw material are put in electric furnace carries out time segment heat treatment, first time period heating-up temperature To 350 DEG C~450 DEG C, 40 minutes heat times;Second time period is warmed as 350 DEG C~450 DEG C, is incubated 1 hour;3rd time Section is heated up to 900 DEG C~1000 DEG C, and the heat time is 55 minutes;4th 900 DEG C of the time period~1000 DEG C, it is incubated 1 hour;5th Time period is warming up to 1200 DEG C~1400 DEG C, 40 minutes heat times;6th 1200 DEG C of the time period~1400 DEG C, it is incubated 3 hours After come out of the stove forging, when workpiece temperature terminates forging when 1200 DEG C~1400 DEG C are cooled to 1100 DEG C~1200 DEG C in forging process Make;
(2) repeatedly forging:Workpiece is melted down into heating, heating process is identical with first forging heating process, treats workpiece temperature Come out of the stove after insulation being carried out when 1200 DEG C~1400 DEG C 3 hours and repeatedly forged.
Present invention process has effectively ensured the consistent uniformity of the internal and external temperature of workpiece, operating temperature be accurate to ± 10 with It is interior effective ensured working heat scaling, it is to avoid the material infringement of the element such as sulphur phosphorus to material during heating, make The service life of product improves more than 30%, and in use the product is resistance in respective media effectively to have ensured product Hot property and corrosion resisting property.
Specific embodiment
Example 1
A kind of forging technology of high temperature is anti-corrosion flange forge piece, by taking N04400 raw material as an example, using forging technology twice, will Raw material are put in electric furnace carries out time segment heat treatment, and concrete technology step is as follows:
(1) first forging:N04400 raw material are put in electric furnace carries out time segment heat treatment, and first time period adds Hot temperature to 400 DEG C, 40 minutes heat times;Second time period is warmed as 400 DEG C, is incubated 1 hour;3rd time period was heated up to 950 DEG C, the heat time is 55 minutes;4th 950 DEG C of time period, it is incubated 1 hour;5th time period was warming up to 1250 DEG C, heating 40 minutes time;6th 1250 DEG C of time period, forging of coming out of the stove after being incubated 3 hours, when workpiece temperature is by 1250 DEG C in forging process Terminate forging when being cooled to 1150 DEG C;
(2) secondary forging:Workpiece is melted down into heating, heating process is identical with first forging heating process, treats workpiece temperature Coming out of the stove after insulation being carried out when 1250 DEG C 3 hours carries out secondary forging.
The material infringement of the element such as sulphur phosphorus to material during heating is present invention, avoiding, the service life for making product is carried It is high by more than 30%, effectively ensure product heat resistance and corrosion resistance of the product in respective media in use Can, forging mechanical performance symbol Jing after the detection such as tension test, impact test, ultrasound detection, Metallographic Analysis after machining Close national respective standard.Forging is assessed as 5-6 level high standard forging Jing after authoritative department detection, and product is greatly improved Close 100% product export 100% of yield rate qualification rate.
Example 2
A kind of forging technology of high temperature is anti-corrosion flange forge piece, by taking N10276 raw material as an example, using three forging technologies, will Raw material are put in electric furnace carries out time segment heat treatment, and concrete technology step is as follows:
(1) first forging:N10276 raw material are put in electric furnace carries out time segment heat treatment, and first time period adds Hot temperature to 450 DEG C, 40 minutes heat times;Second time period is warmed as 450 DEG C, is incubated 1 hour;3rd time period was heated up to 1000 DEG C, the heat time is 55 minutes;4th 1000 DEG C of time period, it is incubated 1 hour;5th time period was warming up to 1300 DEG C, plus 40 minutes hot time;6th 1300 DEG C of time period, forging of coming out of the stove after being incubated 3 hours, when workpiece temperature is by 1300 in forging process Terminate forging when DEG C being cooled to 1200 DEG C;
(2) secondary forging:Workpiece is melted down into heating, heating process is identical with first forging heating process, treats workpiece temperature Coming out of the stove after insulation being carried out when 1300 DEG C 3 hours carries out secondary forging;
(3) three forgings:Workpiece is melted down into heating, heating process is identical with first forging heating process, treats workpiece temperature Coming out of the stove after insulation being carried out when 1300 DEG C 3 hours carries out three forgings.

Claims (1)

1. a kind of forging technology of the anti-corrosion flange forge piece of high temperature, is characterized in that according to the material of forging using multiple forging technology, Raw material are put in electric furnace carries out time segment heat treatment, and concrete technology step is as follows:
(1) first forging:Raw material are put in electric furnace carries out time segment heat treatment, and first time period heating-up temperature is extremely 350 DEG C~450 DEG C, 40 minutes heat times;Second time period is warmed as 350 DEG C~450 DEG C, is incubated 1 hour;3rd time period 900 DEG C~1000 DEG C are heated up to, the heat time is 55 minutes;4th 900 DEG C of the time period~1000 DEG C, it is incubated 1 hour;When the 5th Between section be warming up to 1200 DEG C~1400 DEG C, 40 minutes heat times;6th 1200 DEG C of the time period~1400 DEG C, after being incubated 3 hours Come out of the stove forging, when workpiece temperature terminates forging when 1200 DEG C~1400 DEG C are cooled to 1100 DEG C~1200 DEG C in forging process;
(2) repeatedly forging:Workpiece is melted down into heating, heating process is identical with first forging heating process, treats workpiece temperature 1200 DEG C~1400 DEG C when carry out insulation 3 hours after come out of the stove and repeatedly forged.
CN201710176601.1A 2017-03-23 Forging process of high-temperature corrosion-resistant flange forging Active CN106623709B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710176601.1A CN106623709B (en) 2017-03-23 Forging process of high-temperature corrosion-resistant flange forging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710176601.1A CN106623709B (en) 2017-03-23 Forging process of high-temperature corrosion-resistant flange forging

Publications (2)

Publication Number Publication Date
CN106623709A true CN106623709A (en) 2017-05-10
CN106623709B CN106623709B (en) 2021-08-31

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103894792A (en) * 2014-02-26 2014-07-02 陕西华威锻压有限公司 Method for machining forge piece of large-scale single-flange anti-explosion motor main shaft of all-fiber texture
CN104722702A (en) * 2014-11-14 2015-06-24 上海新闵(东台)重型锻造有限公司 Forging forming technology for high-temperature steam pipeline of supercritical unit
CN106048208A (en) * 2016-08-12 2016-10-26 武汉钢铁股份有限公司 Fe-Mn austenite non-magnetic steel forging method
CN106077379A (en) * 2016-06-20 2016-11-09 安徽省瑞杰锻造有限责任公司 A kind of Forging Technology of 0Cr23Ni13 heat-resistance stainless steel
JP2017001074A (en) * 2015-06-15 2017-01-05 大同特殊鋼株式会社 Method for forging nickel-based alloy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103894792A (en) * 2014-02-26 2014-07-02 陕西华威锻压有限公司 Method for machining forge piece of large-scale single-flange anti-explosion motor main shaft of all-fiber texture
CN104722702A (en) * 2014-11-14 2015-06-24 上海新闵(东台)重型锻造有限公司 Forging forming technology for high-temperature steam pipeline of supercritical unit
JP2017001074A (en) * 2015-06-15 2017-01-05 大同特殊鋼株式会社 Method for forging nickel-based alloy
CN106077379A (en) * 2016-06-20 2016-11-09 安徽省瑞杰锻造有限责任公司 A kind of Forging Technology of 0Cr23Ni13 heat-resistance stainless steel
CN106048208A (en) * 2016-08-12 2016-10-26 武汉钢铁股份有限公司 Fe-Mn austenite non-magnetic steel forging method

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