CN107442721A - A kind of warm and hot forging technique of mould - Google Patents
A kind of warm and hot forging technique of mould Download PDFInfo
- Publication number
- CN107442721A CN107442721A CN201710443242.1A CN201710443242A CN107442721A CN 107442721 A CN107442721 A CN 107442721A CN 201710443242 A CN201710443242 A CN 201710443242A CN 107442721 A CN107442721 A CN 107442721A
- Authority
- CN
- China
- Prior art keywords
- mould
- hours
- bar
- incubated
- heated
- Prior art date
- 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
-
- 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
-
- 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
Abstract
The invention provides a kind of warm and hot forging technique of mould, it comprises the following steps：Blanking：Prepare the bar of Cr12 steel materials；Base：Car goes the oxide skin and blind crack of billet surface, obtains the bar-shaped blank with high-quality surface；It is heat-treated before forging：Bar-shaped blank is heated using heating furnace, to remove its stress；Forging：The bar-shaped blank is forged using hot forging equipment, to obtain the mould with predetermined shape；Quenching：Quenching Treatment is carried out to mould using glowing furnace, quenching oil temperature is 1,080 1150 DEG C, a length of 10 15 minutes during quenching；It is tempered for the first time：Mould is heated to 480 500 DEG C using heating furnace, and is incubated 2 2.5 hours, natural cooling of then coming out of the stove；Subzero treatment：Mould is cooled to 198 DEG C using cooling device, and is incubated 2 2.5 hours；Second of tempering：Mould is heated 400 DEG C, and is incubated 24 hours, natural cooling of then coming out of the stove.
Description
Technical field
The present invention relates to mould manufacture field, the warm and hot forging technique of more particularly to a kind of mould.
Background technology
Cr12 steel is to belong to ledeburite steel, and its quenching degree is good, and heat treatment is unlikely to deform, and wearability is also preferable, and Cr12 steel is
For the ideal material of forging mold.
However, the carbon content of Cr12 steel is higher, substantial amounts of alloy carbide is contained in carbon, after forged, carbide is in
Zonal distribution, and the section bar diameter after forging is bigger, carbide is thicker, and zonal distribution is more serious.Therefore, using Cr12 steel
Manufactured mould, easily cracked after upper machine, during being continuing with, crackle extends rapidly, ultimately results in mould mistake
Imitate and can not use.
Basic reason caused by crackle is that the microscopic structure of mould inside material is undesirable, and the carbide of plucked is in
Ribbon is distributed.The carbide of exactly this ribbon distribution have impact on the mechanical property of material.Therefore, it is necessary to Cr12
The forging process of steel mold optimizes, to eliminate its internal ribbon carbide structure, to lift the forging matter of product
Amount.
The content of the invention
In order to solve the above technical problems, a kind of warm and hot forging technique of mould proposed by the present invention, its concrete technical scheme is such as
Under：
A kind of warm and hot forging technique of mould, it is characterised in that：It in turn includes the following steps：
Blanking：Prepare the bar of Cr12 steel materials；
Base：Car goes the oxide skin and blind crack of billet surface, obtains the bar-shaped blank with high-quality surface；
It is heat-treated before forging：Bar-shaped blank is heated using heating furnace, to remove its stress；
Forging：The bar-shaped blank is forged using hot forging equipment, to obtain the mould with predetermined shape
Tool；
Quenching：Quenching Treatment is carried out to mould using glowing furnace, quenching oil temperature is 1080-1150 DEG C, a length of during quenching
10-15 minutes；
It is tempered for the first time：Mould is heated to 480-500 DEG C using heating furnace, and is incubated 2-2.5 hours, is then come out of the stove
Natural cooling；
Subzero treatment：Mould is cooled to -198 DEG C using cooling device, and is incubated 2-2.5 hours；
Second of tempering：Mould is heated 400 DEG C, and is incubated 24 hours, natural cooling of then coming out of the stove.
In a specific embodiment, the temperature control of heat treatment step is before the forging：In 200-250 DEG C of shove charge, rod
Shape blank is heated to 650 DEG C within 1-2 hours, and is incubated 1-2 hours；Then, bar-shaped blank is heated within 1-2 hours
To 850 DEG C, and it is incubated 1-2 hours；Then, bar-shaped blank is heated to 900-1200 DEG C within 1-2 hours, and it is small to be incubated 1-2
When.
In a specific embodiment, in the warm and hot forging step, initial forging temperature is 1080 DEG C, final forging temperature 900
℃。
A kind of warm and hot forging technique of mould provided by the invention, it can effectively improve the internal structure of mould product, lifting
Wilfulness, intensity and the wearability of mould.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, with reference to embodiment
The present invention is further detailed explanation.
A kind of warm and hot forging technique of mould provided by the invention is further elaborated below,
In the embodiment of the present invention, its specific processing technology is followed successively by：
1st, blanking：Prepare the bar of Cr12 steel materials.
2nd, base：Car goes the oxide skin and blind crack of billet surface, obtains the bar-shaped blank with high-quality surface.
3rd, it is heat-treated before forging：Bar-shaped blank is heated using heating furnace, in the present embodiment, is heat-treated before forging
It is divided into three phases, specific temperature control is：In 200-250 DEG C of shove charge, bar-shaped blank is heated to 650 within 1-2 hours
DEG C, and it is incubated 1-2 hours；Then, bar-shaped blank is heated to 850 DEG C within 1-2 hours, and is incubated 1-2 hours；Then, rod
Shape blank is heated to 900-1200 DEG C within 1-2 hours, and is incubated 1-2 hours.It is heat-treated, can effectively reduces stage by stage
The internal stress of bar-shaped blank, it is ready for follow-up warm and hot forging.
4th, forge：The bar-shaped blank is forged using hot forging equipment, to obtain the mould with predetermined shape.
In the present embodiment, initial forging temperature is 1080 DEG C, and final forging temperature is 900 DEG C.
5th, quench：Quenching Treatment is carried out to the mould using glowing furnace, quenching oil temperature is 1080-1150 DEG C, during quenching
A length of 10-15 minutes.Quenching Treatment can effectively lift the hardness and wearability of mould.
6th, it is tempered for the first time：Mould is heated to 480-500 DEG C using heating furnace, and is incubated 2-2.5 hours, is then gone out
Stove natural cooling；
7th, subzero treatment：Mould is cooled to -198 DEG C using liquid fluorine cooling device, and is incubated 2-2.5 hours；
8th, second of tempering：Mould is heated 400 DEG C, and is incubated 24 hours, natural cooling of then coming out of the stove.
Tempering step in the present embodiment includes tempering for the first time and second is tempered, the first time tempering and described
Subzero treatment step is provided between second of tempering.Tempering step in the present embodiment can be obviously improved the toughness of mould.
It can be seen that the present invention can be effectively improved the interior material structure of the mould product of Cr12 steel materials, mould is improved
Toughness, intensity and wearability.
The description with certain particularity detailed enough has been carried out to the present invention above.Common skill in art
Art personnel are it should be understood that what the description in embodiment was merely exemplary, without departing from true spirit and scope of the present invention
Under the premise of make it is all change should all belong to protection scope of the present invention.Scope of the present invention is by described
Claims be defined, rather than limited by foregoing description in embodiment.
Claims (3)
- A kind of 1. warm and hot forging technique of mould, it is characterised in that：It in turn includes the following steps：Blanking：Prepare the bar of Cr12 steel materials；Base：Car goes the oxide skin and blind crack of billet surface, obtains the bar-shaped blank with high-quality surface；It is heat-treated before forging：Bar-shaped blank is heated using heating furnace, to remove its stress；Forging：The bar-shaped blank is forged using hot forging equipment, to obtain the mould with predetermined shape；Quenching：Quenching Treatment is carried out to mould using glowing furnace, quenching oil temperature is 1080-1150 DEG C, a length of 10-15 points during quenching Clock；It is tempered for the first time：Mould is heated to 480-500 DEG C using heating furnace, and is incubated 2-2.5 hours, nature of then coming out of the stove is cold But；Subzero treatment：Mould is cooled to -198 DEG C using cooling device, and is incubated 2-2.5 hours；Second of tempering：Mould is heated 400 DEG C, and is incubated 24 hours, natural cooling of then coming out of the stove.
- 2. warm and hot forging technique as claimed in claim 1, it is characterised in that：The temperature control of heat treatment step is before the forging： In 200-250 DEG C of shove charge, bar-shaped blank is heated to 650 DEG C within 1-2 hours, and is incubated 1-2 hours；Then, bar-shaped blank 850 DEG C are heated within 1-2 hours, and is incubated 1-2 hours；Then, bar-shaped blank is heated to 900- within 1-2 hours 1200 DEG C, and it is incubated 1-2 hours.
- 3. warm and hot forging technique as claimed in claim 1, it is characterised in that：In the warm and hot forging step, initial forging temperature 1080 DEG C, final forging temperature is 900 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443242.1A CN107442721A (en) | 2017-06-13 | 2017-06-13 | A kind of warm and hot forging technique of mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443242.1A CN107442721A (en) | 2017-06-13 | 2017-06-13 | A kind of warm and hot forging technique of mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107442721A true CN107442721A (en) | 2017-12-08 |
Family
ID=60486804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710443242.1A Pending CN107442721A (en) | 2017-06-13 | 2017-06-13 | A kind of warm and hot forging technique of mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107442721A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385510A (en) * | 2018-10-20 | 2019-02-26 | 江苏铸鸿锻造有限公司 | A kind of Cr-Ni-Mo crack-sensitivity steel major diameter forging circle casting skin hardening and tempering process |
| CN109706398A (en) * | 2019-02-26 | 2019-05-03 | 中钢集团西安重机有限公司 | A kind of preparation method of silicon steel and its plate |
| CN110497165A (en) * | 2019-08-23 | 2019-11-26 | 临清宇联轴承科技有限公司 | A kind of forging method of bearing ring forging mold |
| CN113617991A (en) * | 2021-08-13 | 2021-11-09 | 南京思创精密模具有限公司 | Hot forging process for die |
Citations (4)
| 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 | Method for forging Crl2MoV steel |
| CN102766803A (en) * | 2012-07-05 | 2012-11-07 | 无锡市钻通工程机械有限公司 | Free forging processing process of alloyed tool steel 5CrNiMo for footstep shaft |
| CN104057270A (en) * | 2014-06-30 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Processing method of hammer forging die |
| CN106282510A (en) * | 2016-08-25 | 2017-01-04 | 瑞安市劲力机械制造有限公司 | The forging of Cr12 steel mold and Technology for Heating Processing |
-
2017
- 2017-06-13 CN CN201710443242.1A patent/CN107442721A/en active Pending
Patent Citations (4)
| 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 | Method for forging Crl2MoV steel |
| CN102766803A (en) * | 2012-07-05 | 2012-11-07 | 无锡市钻通工程机械有限公司 | Free forging processing process of alloyed tool steel 5CrNiMo for footstep shaft |
| CN104057270A (en) * | 2014-06-30 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Processing method of hammer forging die |
| CN106282510A (en) * | 2016-08-25 | 2017-01-04 | 瑞安市劲力机械制造有限公司 | The forging of Cr12 steel mold and Technology for Heating Processing |
Non-Patent Citations (2)
| Title |
|---|
| 王孝培: "《实用冲压技术手册》", 31 August 2013, 机械工业出版社 * |
| 王邦杰 等: "《实用模具材料手册》", 30 June 2014, 湖南科学技术出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385510A (en) * | 2018-10-20 | 2019-02-26 | 江苏铸鸿锻造有限公司 | A kind of Cr-Ni-Mo crack-sensitivity steel major diameter forging circle casting skin hardening and tempering process |
| CN109706398A (en) * | 2019-02-26 | 2019-05-03 | 中钢集团西安重机有限公司 | A kind of preparation method of silicon steel and its plate |
| CN110497165A (en) * | 2019-08-23 | 2019-11-26 | 临清宇联轴承科技有限公司 | A kind of forging method of bearing ring forging mold |
| CN113617991A (en) * | 2021-08-13 | 2021-11-09 | 南京思创精密模具有限公司 | Hot forging process for die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 224100 Nanxiang Road 299, Dafeng Economic Development Zone, Yancheng City, Jiangsu Applicant after: Jiangsu Sunway Precision Forging Co., Ltd. Address before: 224100 No. 299 Nanxiang Road, Yancheng City Economic Development Zone, Jiangsu Applicant before: Jiangsu Sunway Precision Forging Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |