CN106077378A - A kind of forging processing technique of Cr12MoV steel - Google Patents
A kind of forging processing technique of Cr12MoV steel Download PDFInfo
- Publication number
- CN106077378A CN106077378A CN201610454856.5A CN201610454856A CN106077378A CN 106077378 A CN106077378 A CN 106077378A CN 201610454856 A CN201610454856 A CN 201610454856A CN 106077378 A CN106077378 A CN 106077378A
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- forging
- temperature
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
nullIt is an object of the invention to the forging processing technique of a kind of Cr12MoV steel，It is characterized in that，Its concrete Forging Technology process is: (1) warm-up phase: before forging enters stove，First furnace interior is carried out primary the pre-heat treatment，And the dead angle in stove is carried out jet heating，In-furnace temperature is made uniformly to reach 270 DEG C，(2) heating period: forging is put into the most preheated stove and heats，And when heating, forging is constantly overturn，(3) the forging stage: will warm up and require that the forging taking-up of temperature carries out forging processing，Gently to hammer into shape when forging and beat slowly，Upsetting pull repeatedly，Carry out two pyrogene types simultaneously，And forging ratio > 3，(4) processing stage of cooling，Make to have during heating enough temperature retention times，It is easy to during forging to smash the segregation of heart portion and net carbide，Improve plasticity，Reduce forging difficulty.
Description
Technical field
The present invention relates to the field in terms of forging processing and auxiliary component, particularly at the forging to Cr12MoV steel
Improvement in terms of reason processing method, refers more particularly to the forging processing technique of a kind of Cr12MoV steel.
Background technology
Along with going from strength to strength of the flourish of forging industry and national economy, large-scale interior outer step cylindrical forged piece demand
Day by day increase, along with the progress of science and technology, industrial machine to high-performance, high parameter, maximization development trend obvious, Cr12MoV
Being mould steel, high containing C, Cr, plasticity is poor, poor thermal conductivity, in heating process temperature control improper, be susceptible to overheated, burning scarce
Fall into.Simultaneously because steel ingot heart portion exists segregation and net carbide, during forging, heart portion easily cracks, and forging difficulty is big, sternly
Heavily waste material, improve production cost.
Therefore it provides the forging processing technique of a kind of Cr12MoV steel, to can by processing technique is improved,
Make to have during heating enough temperature retention times, it is simple to the segregation of heart portion and net carbide can be smashed during forging, improve plasticity, fall
Low forging difficulty, improves and strict controlled forge process temperature, improves the quality of forging, reduces local fracture, reduces waste of material,
Reduce cost, just become the problem that those skilled in the art need solution badly.
Summary of the invention
It is an object of the invention to provide the forging processing technique of a kind of Cr12MoV steel, to can be by processing technique
Improve, make to have during heating enough temperature retention times, it is simple to during forging, the segregation of heart portion and net carbide can be smashed, improve
Plasticity, reduces forging difficulty, and strict controlled forge process temperature, improves the quality of forging, reduce local fracture, reduce material
Waste, reduces cost.
For solving technical problem described in background technology, the present invention by the following technical solutions:
The forging processing technique of a kind of Cr12MoV steel, it is characterised in that its concrete Forging Technology process is:
(1) warm-up phase: before forging enters stove, first carries out primary the pre-heat treatment to furnace interior, and in stove
Dead angle carries out jet heating, makes in-furnace temperature uniformly reach 270 DEG C, preheats body of heater in advance, it is possible to avoid body of heater local
Supercool, affect the uniformity of forging heating.
(2) heating period: forging is put into the most preheated stove and heats, and when heating, forging is carried out not
Disconnected upset:
During heating, forging is carried out low temperature and enter stove, when temperature reaches 600 DEG C, be incubated 3h；
The most once heat, and heated by 50 60 DEG C/h, stop heating when 800 DEG C to be achieved, and enter
Enter to holding stage, persistent period 3h；
Insulation enters into post bake after terminating, and heats with 70 80 DEG C/h, stops when 1,180 1200 DEG C to be achieved
Only heating, and enter into holding stage, persistent period 4 5h.
(3) the forging stage: will warm up and require that the forging taking-up of temperature carries out forging processing, gently to hammer into shape when forging slow
Beat, upsetting pull repeatedly, carry out two pyrogene types, and forging ratio simultaneously 3:
35 upsetting pulls it are divided into process during forging upsetting pull, and upsetting pull amount 70 120mm every time；A small amount of upsetting pull several times pushes away
Enter, it is possible to avoid being advanced over producing local fracture when forging more.
When carrying out upsetting pull forging, forging temperature controls between initial forging temperature and final forging temperature, and temperature is initial forging temperature control
At 1060～1080 DEG C, final forging temperature is 900～850 DEG C, when forging temperature is less than 900 DEG C, should stop forging immediately, and return
Stove heats, and strictly controls forging temperature, it is possible to makes forging keep optimal mecystasis when forging, keeps preferably
As-forged condition, improves forging quality.
(4) processing stage of cooling: after employing is as cold as 700 DEG C after terminating by forging soon, then by cheating the cold or side of sand cooling
Method carries out slow cooling, carries out cooling process with slower speed, it is possible to prevent cooling time forging due to internal and external temperature gap
Relatively big asynchronous with cooling, make stress different, cause forging local fracture.
The invention has the beneficial effects as follows:
1), by processing technique is improved, make to have during heating enough temperature retention times, it is simple to by inclined for the heart portion during forging
Analysis and net carbide can smash, and improve plasticity, reduce forging difficulty.
2), strict controlled forge process temperature, improve forging quality, reduce local fracture, reduce waste of material, reduce into
This.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only described in the present invention
A little embodiments.
Fig. 1 is the heating in the forging curve chart of Cr12MoV steel in the embodiment of the present invention.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, the present invention will be made into one below
Being discussed in detail of step.
Refer to Fig. 1, the forging processing technique of a kind of Cr12MoV steel, its concrete Forging Technology process is:
(1) warm-up phase: before forging enters stove, first carries out primary the pre-heat treatment to furnace interior, and in stove
Dead angle carries out jet heating, makes in-furnace temperature uniformly reach 270 DEG C, preheats body of heater in advance, it is possible to avoid body of heater local
Supercool, affect the uniformity of forging heating.
(2) heating period: forging is put into the most preheated stove and heats, and when heating, forging is carried out not
Disconnected upset:
During heating, forging is carried out low temperature and enter stove, when temperature reaches 600 DEG C, be incubated 3h；
The most once heat, and heated by 60 DEG C/h, stop heating when 800 DEG C to be achieved, and enter into
Holding stage, persistent period 3h；
Insulation enters into post bake after terminating, and heats with 80 DEG C/h, stops adding when 1,180 1200 DEG C to be achieved
Heat, and enter into holding stage, persistent period 5h.
(3) the forging stage: will warm up and require that the forging taking-up of temperature carries out forging processing, gently to hammer into shape when forging slow
Beat, upsetting pull repeatedly, carry out two pyrogene types, and forging ratio simultaneously 3:
5 upsetting pulls it are divided into process during forging upsetting pull, and upsetting pull amount 110mm every time；A small amount of upsetting pull several times advances.
When carrying out upsetting pull forging, forging temperature controls between initial forging temperature and final forging temperature, and temperature is initial forging temperature control
At 1060 DEG C, final forging temperature is 900 DEG C, when forging temperature is less than 900 DEG C, should stop forging immediately, and melt down heating, to forging
Make temperature strictly to control, it is possible to make forging keep optimal mecystasis when forging, keep more preferable as-forged condition, carry
High forging quality.
Using above-mentioned processing step, by forging repeatedly carries out upsetting pull process, and gently hammer is beaten slowly, upsetting pull repeatedly, with
Shi Jinhang two pyrogene type, and forging ratio > 3, it is possible to avoid being advanced over producing local fracture when forging more, increase forging ratio, with
Improve forging proportion.
(4) processing stage of cooling: after employing is as cold as 700 DEG C after terminating by forging soon, then by cheating the cold or side of sand cooling
Method carries out slow cooling, carries out cooling process with slower speed, it is possible to prevent cooling time forging due to internal and external temperature gap
Relatively big asynchronous with cooling, make stress different, cause forging local fracture.
When can be easy to forging by the above embodiments, the segregation of heart portion and net carbide can be smashed, improve plastic
Property, reduce forging difficulty, it is to avoid overheated during heating, burning, when reducing heats forged, produce local fracture, improve forging quality.
By the way of explanation, only describe some one exemplary embodiment of the present invention above, undoubtedly, for ability
The those of ordinary skill in territory, in the case of without departing from the spirit and scope of the present invention, can be by various different modes to institute
The embodiment described is modified.Therefore, above-mentioned accompanying drawing and description are the most illustrative, should not be construed as the present invention
The restriction of claims.
Claims (1)
1. the forging processing technique of a Cr12MoV steel, it is characterised in that its concrete Forging Technology process is:
(1) warm-up phase: before forging enters stove, first carries out primary the pre-heat treatment to furnace interior, and to the dead angle in stove
Carry out jet heating, make in-furnace temperature uniformly reach 270 DEG C.
(2) heating period: forging is put into the most preheated stove and heats, and when heating, forging is carried out constantly
Upset:
During heating, forging is carried out low temperature and enter stove, when temperature reaches 600 DEG C, be incubated 3h；
The most once heat, and heated by 50 60 DEG C/h, stop heating when 800 DEG C to be achieved, and enter into
Holding stage, persistent period 3h；
Insulation enters into post bake after terminating, and heats with 70 80 DEG C/h, stops adding when 1,180 1200 DEG C to be achieved
Heat, and enter into holding stage, persistent period 4 5h.
(3) the forging stage: will warm up and require that the forging taking-up of temperature carries out forging processing, gently to hammer into shape when forging and beat slowly, instead
Multiple upsetting pull, carries out two pyrogene types, and forging ratio simultaneously > 3:
35 upsetting pulls it are divided into process during forging upsetting pull, and upsetting pull amount 70 120mm every time；
When carrying out upsetting pull forging, forging temperature controls between initial forging temperature and final forging temperature, and temperature is that initial forging temperature controls
1060～1080 DEG C, final forging temperature is 900～850 DEG C, when forging temperature is less than 900 DEG C, should stop forging immediately, and melt down
Heating.
(4), the processing stage of cooling: after employing is as cold as 700 DEG C after terminating by forging soon, then entered by cold or sand cooling the method in hole
Row slow cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454856.5A CN106077378A (en) | 2016-06-20 | 2016-06-20 | A kind of forging processing technique of Cr12MoV steel |
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| CN201610454856.5A CN106077378A (en) | 2016-06-20 | 2016-06-20 | A kind of forging processing technique of Cr12MoV steel |
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| CN201610454856.5A Pending CN106077378A (en) | 2016-06-20 | 2016-06-20 | A kind of forging processing technique of Cr12MoV steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112756545A (en) * | 2020-12-30 | 2021-05-07 | 安徽省瑞杰锻造有限责任公司 | Free forging process of trunnion forging |
| CN113953422A (en) * | 2021-10-21 | 2022-01-21 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Crl2MoV steel forging method |
| CN101748251A (en) * | 2008-11-28 | 2010-06-23 | 山东泰山钢铁集团有限公司 | Forging method of Cr12MoV cold work die steel module |
| CN102181613A (en) * | 2011-03-15 | 2011-09-14 | 新乡市凯迪轧辊有限公司 | Heat treatment method for large-scale Cr12Mov workpiece |
| CN104014703A (en) * | 2014-06-16 | 2014-09-03 | 安徽省瑞杰锻造有限责任公司 | Forging process for C12MoV twisting rollers |
| CN104745780A (en) * | 2015-03-17 | 2015-07-01 | 辽宁金钢重型锻造有限公司 | Production method for forging and thermally treating Cr12MoV steel |
-
2016
- 2016-06-20 CN CN201610454856.5A patent/CN106077378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727502A (en) * | 2004-07-29 | 2006-02-01 | 山东泰山钢铁有限公司 | Crl2MoV steel forging method |
| CN101748251A (en) * | 2008-11-28 | 2010-06-23 | 山东泰山钢铁集团有限公司 | Forging method of Cr12MoV cold work die steel module |
| CN102181613A (en) * | 2011-03-15 | 2011-09-14 | 新乡市凯迪轧辊有限公司 | Heat treatment method for large-scale Cr12Mov workpiece |
| CN104014703A (en) * | 2014-06-16 | 2014-09-03 | 安徽省瑞杰锻造有限责任公司 | Forging process for C12MoV twisting rollers |
| CN104745780A (en) * | 2015-03-17 | 2015-07-01 | 辽宁金钢重型锻造有限公司 | Production method for forging and thermally treating Cr12MoV steel |
Non-Patent Citations (1)
| Title |
|---|
| 张志文: "《锻造工艺学》", 30 November 1988 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112756545A (en) * | 2020-12-30 | 2021-05-07 | 安徽省瑞杰锻造有限责任公司 | Free forging process of trunnion forging |
| CN113953422A (en) * | 2021-10-21 | 2022-01-21 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
| CN113953422B (en) * | 2021-10-21 | 2023-12-22 | 浙江大隆特材有限公司 | 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof |
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Application publication date: 20161109 |