CN105950848A - Forging technology of Cr 12 annular forging piece - Google Patents
Forging technology of Cr 12 annular forging piece Download PDFInfo
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- CN105950848A CN105950848A CN201610454246.5A CN201610454246A CN105950848A CN 105950848 A CN105950848 A CN 105950848A CN 201610454246 A CN201610454246 A CN 201610454246A CN 105950848 A CN105950848 A CN 105950848A
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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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Crystallography & Structural Chemistry (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The invention relates to a forging technology of a Cr 12 annular forging piece, and belongs to the technical field of processing of the Cr 12 annular forging pieces. The forging technology comprises the following steps of (1) selecting Cr 12 steel, wherein visible defects cannot exist on the surface of the Cr 12 steel, and if the visible defects exist, immediately polishing the Cr 12 steel until the visible defects are completely polished for use; (2) placing the Cr 12 steel into a furnace, wherein gaps are reserved between the Cr 12 steel after the CR12 steel is placed in the furnace; (3) performing first-time heating on the Cr 12 steel in the furnace, and then performing first-time heat preservation; (4) performing second-time heating on the first-time heat preserved Cr 12 steel, and then performing second-time heat preservation; (5) forging the second-time heat preserved Cr 12 steel, firstly forging softly, and when the temperature of the softly forged Cr 12 steel is 950-1000 DEG C, enhancing hammering force; and (6) after slowly cooling the forged Cr 12 steel to 600-700 DEG C, loading the cooked Cr 12 steel in the furnace, and performing. The Cr 12 annular forging piece processed by the forging technology disclosed by the invention is free from cracks during heating or forging, low in carbide segregation, good in thermal conductivity and low in brittleness.
Description
Technical field
The invention belongs to Cr12 annular forging piece processing technique field, particularly relate to a kind of Cr12 annular forging piece
Forging Technology.
Background technology
Cr12 mould steel belongs to high carbon and chromium ledeburite steel, is also widely used cold work die steel.This steel
There is preferable quenching degree, wearability, hot-workability.Carbide is distributed preferably in steel, can be used for making
Make complex-shaped, working condition heavy under various cold-working moulds.The poor thermal conductivity of Cr12 mould steel, carbon
Compound segregation is serious, and fragility is big, heats, forges and easily crack.
Summary of the invention
The technical problem to be solved is to provide the Forging Technology of a kind of Cr12 annular forging piece.
For solving the problems referred to above, the Forging Technology of a kind of Cr12 annular forging piece of the present invention, this technique
It is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
1/2D～5/6D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 500～700 DEG C,
Then carrying out an isothermal holding, one time holding temperature is 500～600 DEG C, temperature retention time be 5～
20 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 750～850 DEG C, then carries out
Secondary isothermal holding, secondary holding temperature is 750～850 DEG C, and secondary temperature retention time is 10～15 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 850～950 DEG C, works as Cr12
When steel temperature is 950～1000 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 600～700 DEG C, Cr12 steel shove charge is annealed.
Compared with prior art, the invention have the advantages that the Cr12 annular forging piece of the present invention is in heating
Or will not crack during forging；The Cr12 annular forging piece carbide segregation of the present invention is slight；The present invention's
Heat conductivity is good；The fragility of the present invention is little.
Detailed description of the invention
Embodiment 1
A kind of Forging Technology of Cr12 annular forging piece, this technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
1/2D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 500 DEG C, then enters
Isothermal holding of row, one time holding temperature is 500 DEG C, and one time temperature retention time is 5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 750 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 750 DEG C, and secondary temperature retention time is 10 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 850 DEG C, when Cr12 steel
When temperature is 950 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 600 DEG C, Cr12 steel shove charge is annealed.
It is demonstrated experimentally that Cr12 annular forging piece will not crack when heating or forging under this parameter；Cr12
Annular forging piece carbide segregation is slight；The heat conductivity of Cr12 annular forging piece is good；The fragility of Cr12 annular forging piece
Little.
Embodiment 2
A kind of Forging Technology of Cr12 annular forging piece, this technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
7/12D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 550 DEG C, then enters
Isothermal holding of row, one time holding temperature is 525 DEG C, and one time temperature retention time is 8.5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 775 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 775 DEG C, and secondary temperature retention time is 11 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 875 DEG C, when Cr12 steel
When temperature is 960 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 620 DEG C, Cr12 steel shove charge is annealed.
It is demonstrated experimentally that Cr12 annular forging piece will not crack when heating or forging under this parameter；Cr12
Annular forging piece carbide segregation is slight；The heat conductivity of Cr12 annular forging piece is preferable；Cr12 annular forging piece crisp
Property is less.
Embodiment 3
A kind of Forging Technology of Cr12 annular forging piece, this technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
2/3D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 600 DEG C, then enters
Isothermal holding of row, one time holding temperature is 550 DEG C, and one time temperature retention time is 12.5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 800 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 800 DEG C, and secondary temperature retention time is 13 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 900 DEG C, when Cr12 steel
When temperature is 975 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 650 DEG C, Cr12 steel shove charge is annealed.
It is demonstrated experimentally that Cr12 annular forging piece will not crack when heating or forging under this parameter；Cr12
Annular forging piece carbide segregation is slight；The heat conductivity of Cr12 annular forging piece is best；Cr12 annular forging piece crisp
Property minimum.
Therefore, the present embodiment is preferred embodiment.
Embodiment 4
A kind of Forging Technology of Cr12 annular forging piece, this technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
9/12D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 650 DEG C, then enters
Isothermal holding of row, one time holding temperature is 575 DEG C, and one time temperature retention time is 17 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 825 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 825 DEG C, and secondary temperature retention time is 14 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 925 DEG C, when Cr12 steel
When temperature is 990 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 675 DEG C, Cr12 steel shove charge is annealed.
It is demonstrated experimentally that Cr12 annular forging piece will not crack when heating or forging under this parameter；Cr12
Annular forging piece carbide segregation is slight；The heat conductivity of Cr12 annular forging piece is preferable；Cr12 annular forging piece crisp
Property is little.
Embodiment 5
A kind of Forging Technology of Cr12 annular forging piece, this technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
5/6D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 700 DEG C, then enters
Isothermal holding of row, one time holding temperature is 600 DEG C, and one time temperature retention time is 20 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 850 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 850 DEG C, and secondary temperature retention time is 15 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 950 DEG C, when Cr12 steel
When temperature is 1000 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 700 DEG C, Cr12 steel shove charge is annealed.
It is demonstrated experimentally that Cr12 annular forging piece will not crack when heating or forging under this parameter；Cr12
Annular forging piece carbide segregation is slight；The heat conductivity of Cr12 annular forging piece is good；The fragility of Cr12 annular forging piece
Less.
Claims (6)
1. the Forging Technology of a Cr12 annular forging piece, it is characterised in that: this technique is by following steps
Composition:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
1/2D～5/6D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 500～700 DEG C,
Then carrying out an isothermal holding, one time holding temperature is 500～600 DEG C, temperature retention time be 5～
20 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 750～850 DEG C, then carries out
Secondary isothermal holding, secondary holding temperature is 750～850 DEG C, and secondary temperature retention time is 10～15 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 850～950 DEG C, works as Cr12
When steel temperature is 950～1000 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 600～700 DEG C, Cr12 steel shove charge is annealed.
A kind of Forging Technology of Cr12 annular forging piece, it is characterised in that:
This technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
1/2D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 500 DEG C, then enters
Isothermal holding of row, one time holding temperature is 500 DEG C, and one time temperature retention time is 5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 750 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 750 DEG C, and secondary temperature retention time is 10 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 850 DEG C, when Cr12 steel
When temperature is 950 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 600 DEG C, Cr12 steel shove charge is annealed.
A kind of Forging Technology of Cr12 annular forging piece, it is characterised in that:
This technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
7/12D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 550 DEG C, then enters
Isothermal holding of row, one time holding temperature is 525 DEG C, and one time temperature retention time is 8.5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 775 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 775 DEG C, and secondary temperature retention time is 11 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 875 DEG C, when Cr12 steel
When temperature is 960 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 620 DEG C, Cr12 steel shove charge is annealed.
A kind of Forging Technology of Cr12 annular forging piece, it is characterised in that:
This technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
2/3D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 600 DEG C, then enters
Isothermal holding of row, one time holding temperature is 550 DEG C, and one time temperature retention time is 12.5 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 800 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 800 DEG C, and secondary temperature retention time is 13 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 900 DEG C, when Cr12 steel
When temperature is 975 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 650 DEG C, Cr12 steel shove charge is annealed.
A kind of Forging Technology of Cr12 annular forging piece, it is characterised in that:
This technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
9/12D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 650 DEG C, then enters
Isothermal holding of row, one time holding temperature is 575 DEG C, and one time temperature retention time is 17 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 825 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 825 DEG C, and secondary temperature retention time is 14 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 925 DEG C, when Cr12 steel
When temperature is 990 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 675 DEG C, Cr12 steel shove charge is annealed.
A kind of Forging Technology of Cr12 annular forging piece, it is characterised in that:
This technique is to comprise the steps of:
(1) selecting Cr12 steel, Cr12 steel surface can not be with the presence of macroscopic defect, if existing,
Re-use after polishing is clean immediately；
(2) being loaded in stove by Cr12 steel, should leave gap after shove charge between Cr12 steel, clearance distance is
5/6D, D are the diameter of Cr12 steel so that Cr12 steel uniformly heats；
(3) once heating Cr12 steel in stove, one time heating-up temperature is 700 DEG C, then enters
Isothermal holding of row, one time holding temperature is 600 DEG C, and one time temperature retention time is 20 minutes；
(4) Cr12 steel carrying out post bake, post bake temperature is 850 DEG C, then carries out secondary guarantor
Temperature processes, and secondary holding temperature is 850 DEG C, and secondary temperature retention time is 15 minutes；
(5) Cr12 steel carrying out conducting forging processing, the lightest forging, light forging temperature is 950 DEG C, when Cr12 steel
When temperature is 1000 DEG C, increases hammer force, make carbide smash and be uniformly distributed；
(6) slow cooling is needed after the forging of Cr12 steel, it is to avoid structural stress and thermal stress interact and cause out
Split, after slow cooling to 700 DEG C, Cr12 steel shove charge is annealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610454246.5A CN105950848A (en) | 2016-06-20 | 2016-06-20 | Forging technology of Cr 12 annular forging piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610454246.5A CN105950848A (en) | 2016-06-20 | 2016-06-20 | Forging technology of Cr 12 annular forging piece |
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| CN201610454246.5A Pending CN105950848A (en) | 2016-06-20 | 2016-06-20 | Forging technology of Cr 12 annular forging piece |
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Citations (3)
| 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 |
| 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 |
| 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 CN201610454246.5A patent/CN105950848A/en active Pending
Patent Citations (3)
| 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 |
| 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 |
| 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 (2)
| Title |
|---|
| 丁云权等: "关于Cr12MoV冷作模具钢锻造工艺的研讨", 《冶金标准化与质量》 * |
| 刘大伟: "Cr12、Cr12MoV锻件工艺技术控制", 《机械工程师》 * |
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Application publication date: 20160921 |
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