CN106282510A - The forging of Cr12 steel mold and Technology for Heating Processing - Google Patents
The forging of Cr12 steel mold and Technology for Heating Processing Download PDFInfo
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- CN106282510A CN106282510A CN201610717979.3A CN201610717979A CN106282510A CN 106282510 A CN106282510 A CN 106282510A CN 201610717979 A CN201610717979 A CN 201610717979A CN 106282510 A CN106282510 A CN 106282510A
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of Cr12 steel mold forging and Technology for Heating Processing, including following operation: 200 DEG C of shove charges, be warming up to 650 DEG C with stove, be incubated 1 2h, be again heated to 850 DEG C, be incubated 1 2h, then rise to 1000 DEG C, be incubated 1 2h；Initial forging temperature is 1080 DEG C, and final forging temperature is 900 DEG C；1080 1150 DEG C of oil quenchings, 5 10min；Cooling；500 530 DEG C of tempering, are incubated 2h；Come out of the stove, be placed in natural cooling in air；198 DEG C of subzero treatment 24h；400 DEG C of tempering, are incubated 2h；Cooling.The present invention can realize material forging deformation uniformly, improve material structure, thoroughly eliminate the purpose in Cold Roll district in material, and improve the toughness of material, hardness and wearability.
Description
Technical field
The technique that the present invention relates to a kind of technical field of forging, is specifically related to a kind of Forging Technology.
Background technology
Cr12 steel is belonging to ledeburite steel, and its quenching degree is good, and heat treatment is unlikely to deform, and wearability is also preferable, but because of containing height
Carbon Gao Ge, containing substantial amounts of primary carbide and proeutectoid carbide, the tissue after forging there is also more Residual Carbides, in
Netted, zonal distribution, and carbide segregation is serious, so suitable pretreatment must be carried out, to improve original structure, makes lamellar
Carbide becomes the most spherical, reduces its hardness, and prepares for finished heat treatment.The mould that currently used Cr12 steel is made
Tool, uses less than expected number of times after upper machine, just cracks, and during being continuing with, crackle extends rapidly, less than anticipated
Number of times just makes mould invalidation to use.Crackle Producing reason is that material microstructure is undesirable, the carbonization of plucked
Thing is ribbon distribution.The carbide of the most this ribbon distribution have impact on the mechanical property of material.And this banding occurs
The reason of carbide is because Cr12 steel and belongs to ledeburite steel, and carbon content is high, containing a large amount of alloy carbides in carbon, forged
After, carbide is i.e. in zonal distribution, and the section bar diameter after forging is the biggest, and carbide is the thickest, and zonal distribution is the most serious.At mould
In tool manufacture process, forging process plays conclusive effect to improving banded structure, it would be highly desirable to improve.
Summary of the invention
In view of the deficiency of background technology, the technical problem to be solved is to provide a kind of elimination Residual Carbides also
Improve the forging of Cr12 steel mold and the Technology for Heating Processing of toughness, hardness and wearability.
For achieving the above object, the technical scheme is that the forging of Cr12 steel mold and Technology for Heating Processing, its
It is characterised by: include following operation:
(1) 200 DEG C of shove charges, it is warming up to 650 DEG C with stove, is incubated 1-2h, is again heated to 850 DEG C, be incubated 1-2h, then rise to 1000
DEG C, it is incubated 1-2h；
(2) initial forging temperature is 1080 DEG C, and final forging temperature is 900 DEG C；
(3) 1080-1150 DEG C of oil quenching, 5-10min；
(4) cooling；
(5) 500-530 DEG C of tempering, is incubated 2h；
(6) come out of the stove, be placed in natural cooling in air；
(7)-198 DEG C of subzero treatment 24h；
(8) 400 DEG C of tempering, are incubated 2h；
(9) cooling.
Using hexahedro pier to pull out method described Cr12 steel blank, pull out including three piers three, total forging ratio is 20.
Select the Cr12 steel blank of Ф 75mm, the pneumatic hammer of 700kg forges.
By using technique scheme, owing to reducing blank diameter, original silicon carbide thing distribution uniform can be obtained
Blank；And increase air hammer tonnage is conducive to forging thoroughly, smash center carbide；And hexahedro pier pulls out method more makes forging deformation equal
Even, easily forging is thoroughly so that tissue is improved comprehensively, makes carbide in small, broken bits and is evenly distributed, greatly reducing banded structure.And
On the one hand 1080-1150 DEG C of high temperature quenching promote being completely dissolved of less carbide, on the other hand promotes big carbide
The local dissolution of wedge angle so that the carbide amount dissolved under high temperature increases, and the carbide being completely dissolved is 500-530 DEG C of tempering
During with superfine granular uniform precipitation, make the carbide morphology in steel and distribution be improved, decrease due to quenching before and after
The metaplasia that tissue produces than tolerance, greatly reduces the fragility of mould, enhances toughness, also reduces mould and produces mill
Cut tempering crack tendency, significantly improve die life.And the subzero treatment at-198 DEG C makes retained austenite to martensite especially
Changing, the martensite of thermodynamic instability is distributed in constantly separating out tiny scattered carbide particle on martensitic matrix, fall
The low saturation of martensite, eliminates internal stress, improves the toughness of steel, hardness and wearability.After subzero treatment again 40 DEG C return
Fire can make steel obtain preferably combination property, improves service life.
Detailed description of the invention
Embodiment: include following operation:
(1) 200 DEG C of shove charges, it is warming up to 650 DEG C with stove, is incubated 1-2h, is again heated to 850 DEG C, be incubated 1-2h, then rise to 1000
DEG C, it is incubated 1-2h；
(2) initial forging temperature is 1080 DEG C, and final forging temperature is 900 DEG C；
(3) 1080-1150 DEG C of oil quenching, 5-10min；
(4) cooling；
(5) 500-530 DEG C of tempering, is incubated 2h；
(6) come out of the stove, be placed in natural cooling in air；
(7)-198 DEG C of subzero treatment 24h；
(8) 400 DEG C of tempering, are incubated 2h；
(9) cooling.
Using hexahedro pier to pull out method described Cr12 steel blank, pull out including three piers three, total forging ratio is 20.
Select the Cr12 steel blank of Ф 75mm, the pneumatic hammer of 700kg forges.
The present embodiment, owing to reducing blank diameter, can obtain the blank of original silicon carbide thing distribution uniform；And strengthen
Pneumatic hammer tonnage is conducive to forging thoroughly, smashes center carbide；And hexahedro pier pulls out method and more makes forging deformation uniform, easily forging thoroughly, makes
Must organize and be improved comprehensively, make carbide in small, broken bits and be evenly distributed, greatly reducing banded structure.And 1080-1150 DEG C of high temperature
On the one hand quenching promotes being completely dissolved of less carbide, on the other hand promotes the local dissolution of big carbide wedge angle,
Make under high temperature dissolve carbide amount increase, the carbide being completely dissolved in 500-530 DEG C of drawing process with superfine particle
Shape uniformly separates out, and makes the carbide morphology in steel and distribution be improved, and decreases owing to organizing and produce than tolerance before and after quenching
Raw metaplasia, greatly reduces the fragility of mould, enhances toughness, also reduces mould generation grinding tempering crack and inclines
To, die life significantly improves.And the subzero treatment at-198 DEG C makes retained austenite to martensite transfor mation especially, thermodynamics is not
Stable martensite is distributed in constantly separating out tiny scattered carbide particle on martensitic matrix, reduces the full of martensite
And degree, eliminate internal stress, improve the toughness of steel, hardness and wearability.After subzero treatment, 40 DEG C of tempering can make steel obtain again
Preferably combination property, improves service life.
Claims (3)
1. the forging of Cr12 steel mold and Technology for Heating Processing, it is characterised in that: include following operation:
(1) 200 DEG C of shove charges, it is warming up to 650 DEG C with stove, is incubated 1-2h, is again heated to 850 DEG C, be incubated 1-2h, then rise to 1000
DEG C, it is incubated 1-2h；
(2) initial forging temperature is 1080 DEG C, and final forging temperature is 900 DEG C；
(3) 1080-1150 DEG C of oil quenching, 5-10min；
(4) cooling；
(5) 500-530 DEG C of tempering, is incubated 2h；
(6) come out of the stove, be placed in natural cooling in air；
(7)-198 DEG C of subzero treatment 24h；
(8) 400 DEG C of tempering, are incubated 2h；
(9) cooling.
Cr12 steel mold the most according to claim 1 forging and Technology for Heating Processing, it is characterised in that: to described Cr12 steel billet
Material uses hexahedro pier to pull out method, pulls out including three piers three, and total forging ratio is 20.
Cr12 steel mold the most according to claim 1 forging and Technology for Heating Processing, it is characterised in that: select Ф 75mm's
Cr12 steel blank, forges on the pneumatic hammer of 700kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610717979.3A CN106282510A (en) | 2016-08-25 | 2016-08-25 | The forging of Cr12 steel mold and Technology for Heating Processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610717979.3A CN106282510A (en) | 2016-08-25 | 2016-08-25 | The forging of Cr12 steel mold and Technology for Heating Processing |
Publications (1)
| Publication Number | Publication Date |
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| CN106282510A true CN106282510A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610717979.3A Pending CN106282510A (en) | 2016-08-25 | 2016-08-25 | The forging of Cr12 steel mold and Technology for Heating Processing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862649A (en) * | 2017-03-30 | 2017-06-20 | 安徽锋利锐刀片制造有限公司 | A kind of high accuracy disc rolling shearing blade and its manufacture method |
| CN107442721A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of warm and hot forging technique of mould |
| CN107442720A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of material fabrication process of cold-working mould |
| CN110172549A (en) * | 2019-06-28 | 2019-08-27 | 金川集团股份有限公司 | A kind of processing method of self-lubricating phosphorous copper balls extrusion die |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01225751A (en) * | 1988-03-03 | 1989-09-08 | Kawasaki Steel Corp | Work roll for heavy-load cold rolling excellent in spalling resistance and its production |
| CN101381844A (en) * | 2008-09-11 | 2009-03-11 | 山东中天模具有限公司 | Cold working die steel material and production technology thereof |
| 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 |
| CN103009026A (en) * | 2012-12-26 | 2013-04-03 | 马鞍山市恒利达机械刀片有限公司 | Processing method for rolling scissors with high abrasion resistance and strong shock resistance |
| CN105779898A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Cold-work die steel plate and manufacturing method thereof |
-
2016
- 2016-08-25 CN CN201610717979.3A patent/CN106282510A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01225751A (en) * | 1988-03-03 | 1989-09-08 | Kawasaki Steel Corp | Work roll for heavy-load cold rolling excellent in spalling resistance and its production |
| CN101381844A (en) * | 2008-09-11 | 2009-03-11 | 山东中天模具有限公司 | Cold working die steel material and production technology thereof |
| 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 |
| CN103009026A (en) * | 2012-12-26 | 2013-04-03 | 马鞍山市恒利达机械刀片有限公司 | Processing method for rolling scissors with high abrasion resistance and strong shock resistance |
| CN105779898A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Cold-work die steel plate and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曹光明: ""提高Cr12MoV钢冷作模具寿命的措施"", 《模具工业》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862649A (en) * | 2017-03-30 | 2017-06-20 | 安徽锋利锐刀片制造有限公司 | A kind of high accuracy disc rolling shearing blade and its manufacture method |
| CN107442721A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of warm and hot forging technique of mould |
| CN107442720A (en) * | 2017-06-13 | 2017-12-08 | 江苏森威精锻有限公司 | A kind of material fabrication process of cold-working mould |
| CN110172549A (en) * | 2019-06-28 | 2019-08-27 | 金川集团股份有限公司 | A kind of processing method of self-lubricating phosphorous copper balls extrusion die |
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