CN109306434A - A kind of cold stamping shaping dies steel and the preparation method and application thereof - Google Patents
A kind of cold stamping shaping dies steel and the preparation method and application thereof Download PDFInfo
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- CN109306434A CN109306434A CN201811139071.4A CN201811139071A CN109306434A CN 109306434 A CN109306434 A CN 109306434A CN 201811139071 A CN201811139071 A CN 201811139071A CN 109306434 A CN109306434 A CN 109306434A
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- steel
- shaping dies
- cold stamping
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- stamping shaping
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Abstract
The invention discloses a kind of cold stamping shaping dies steel, include following alloying element: C, Si, Mn, Cr, Mo, V, P, S and Fe, and the mass percent of each element are as follows: C 0.70~0.90%, Si 0.25~0.50%, Mn 0.52~0.72%, Cr 4.00~6.00%, Mo 2.00~2.60%, V 0.30~0.80%, P≤0.015%, S≤0.003%, Fe surplus.The invention also discloses a kind of preparation method of cold stamping shaping dies steel and its applications in automobile manufacture.Cold stamping shaping dies steel provided by the invention has the performance of excellent anti-tipping blade cracking resistance, and high-hardness, wearable ensure that material is less likely to occur to wear and plucking in blanking process, and have good dimensional stability.
Description
Technical field
The present invention relates to steel alloy manufacturing fields, and in particular to a kind of cold stamping shaping dies steel and preparation method thereof with
Using.
Background technique
Due to the development of automotive light weight technology, high-strength steel sheet has become the inexorable trend of contemporary automotive development.High strength steel
The intensity of plate is continuously improved, and has been able to batch production intensity at present in the Automobile Plate of 1500MPa, continuous due to armor plate strength
It improves, it is also higher and higher to hardness, intensity, toughness, the wearability requirement of cold forming die, for intensity in 1000MPa or more
The cold punching pressing formation of Automobile Plate is still without applicable mold materials.
High-strength steel sheet needs bigger blanking pressure to be punched steel plate due to its high intensity during cold stamping
And forming, cold punching die bear huge compression, bending force, impact force and frictional force, therefore main mistake when being on active service
Effect form is cracking, tipping and abrasion.Bear continuous, high-intensitive impact force when mold is on active service, and due to it is complex-shaped, be easy to
It generates stress to concentrate and cause to crack, so needing to have higher obdurability；Due to cold punching die shape and machining work
Skill is complicated, cost is high, and frictional force and friction area are big and lead to wear larger, therefore the difficulty that repairs a die under operating condition, so needing to have
Standby higher wearability.
Originally common cold work die steel in high alloy through Cr12 series in standard GB/T/T 1299-2014, as Cr12MoV,
Cr12Mo1V1 is quite big in China's low-end market dosage, has high hardness and wear-resisting property, but the material is due to existing
More biggish eutectic carbide, and be segregated seriously, although its wearability is good, its toughness is poor, and long service is easy
Existing tipping, phenomena such as being broken and collapsing, therefore Cr12MoV series is not able to satisfy the production of ultrahigh-strength steel plates cold punching pressing formation and wants
It asks.Middle alloy cold work die steel Cr5 series, such as Cr5Mo1V reduce the content of C and Cr, size compared with Cr12Mo1V1 series
Big eutectic carbide and gross segregation be improved significantly, harden ability is good, and heat-treatment distortion is small, and toughness also increases, but
It is that its wearability is substantially reduced, the requirement for high-wearing feature needed for high-strength steel sheet cold punching die is difficult to reach.
Summary of the invention
In view of the above drawbacks of the prior art, has high obdurability proportion, excellent resistance to the present invention provides a kind of
The novel high-strength toughness cold stamping shaping dies steel of mill property, and its preparation and heat treatment process are provided.
Technical scheme is as follows:
The present invention provides a kind of cold stamping shaping dies steel in first aspect, and it includes following alloying elements: C, Si,
Mn, Cr, Mo, V, P, S and Fe, and the mass percent of each element are as follows: C 0.70~0.90%, Si 0.25~0.50%, Mn
0.52~0.72%, Cr 4.00~6.00%, Mo 2.00~2.60%, V 0.30~0.80%, P≤0.015%, S≤
0.003%, Fe surplus.
In preferred embodiment, in cold stamping shaping dies steel the mass ratio of Cr, Mo and V be 9.9~10.0:5~
5.1:1.0~1.1.
The present invention provides a kind of preparation method of cold stamping shaping dies steel in second aspect, comprising the following steps:
Step 1 is smelted: the mass percent of the chemical component of cold stamping shaping dies steel are as follows: C 0.70~0.90%,
Si 0.25~0.50%, Mn 0.52~0.72%, Cr 4.00~6.00%, Mo 2.00~2.60%, V 0.30~
0.80%, P≤0.015%, S≤0.003%, Fe surplus carry out ingredient, melting；
Step 2, electroslag remelting: steel ingot obtained in step 1 is put in electroslag remelting device as consutrode and is carried out
Double refining；Electrode metal is fallen in crystallizer after melting through slag bath, then is frozen into steel ingot, and steel ingot is gradually tied from bottom to top
Crystalline substance, ingredient uniformly, dense structure；
Step 3, forging: the steel ingot handled through step 2 is reheated and is forged, steel forgings blank is obtained；
Step 4, annealing: the heating of above-mentioned steel forgings blank, heat preservation are come out of the stove air-cooled after furnace is cold；
Step 5, quenching and tempering heat treatment.
Preferably, in above-mentioned steps 1, the mass ratio of Cr, Mo and V are 9.9~10.0:5~5.1:1.0~1.1.
Preferably, it in above-mentioned steps 3, is forged after steel ingot is again heated to 1200-1300 DEG C of temperature range inside holding.
Preferably, in above-mentioned steps 3, initial forging temperature is 1000-1100 DEG C, and final forging temperature is 850-950 DEG C.
Preferably, in above-mentioned steps 4, steel forgings blank is heated to 740-840 DEG C of temperature range inside holding.
Preferably, it in above-mentioned steps 4, comes out of the stove after being as cold as 500-600 DEG C with the cooling rate furnace of 10-15 DEG C/s air-cooled.
Preferably, in above-mentioned steps 5, hardening heat is 1000-1050 DEG C, and tempering temperature is 500-550 DEG C, is tempered 2 times.
The present invention discloses application of the above-mentioned cold stamping shaping dies steel in automobile manufacture in the third aspect, described cold
Press forming die is used as pattern material with high strength cold stamping shaping dies steel with steel.
The characteristics of steel of the present invention is the alloying system of the low Cr high Mo of low C, and Cr:Mo:V ≈ 10:5:1.Reasonable ingredient
So that material has the performance of excellent anti-tipping blade cracking resistance, high-hardness, wearable ensure that material is not easy in blanking process
Occur to wear and plucking.Have good dimensional stability after reasonable heat treatment process, material will not be caused to send out because of heat treatment
The cold stamping shaping dies of raw dimension overproof, the high-strength steel sheet severe suitable for working environment is used.
It should be understood that above-mentioned each technical characteristic of the invention and having in below (eg embodiment) within the scope of the present invention
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.So all do not depart from the equivalent or modification completed under principles of this disclosure, this hair is both fallen within
The range of bright protection.
Below with reference to attached drawing, the invention will be further described, with absolutely prove the purpose of the present invention, technical characteristic and
Technical effect.
Detailed description of the invention
Fig. 1 shows the obdurability of steel of the present invention and Cr12MoV, Cr5Mo1V in embodiment 1 and compares；
Fig. 2 shows the comparisons of the obdurability of steel of the present invention in embodiment 2 and Cr12MoV, Cr5Mo1V；
Fig. 3 shows the obdurability of steel of the present invention and Cr12MoV, Cr5Mo1V in embodiment 3 and compares；
Fig. 4 shows the obdurability comparison in preferred embodiment between steel of the present invention；
Fig. 5 shows the wear-resisting property comparison of steel and Cr12MoV of the present invention in preferred embodiment.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.
Embodiment 1
In the present embodiment, the chemical component mass percent of the pattern material with high strength cold stamping shaping dies steel of use is such as
Under:
Cold stamping shaping dies steel is prepared using following methods in the present embodiment:
Step 1 is smelted: carrying out ingredient, melting by mentioned component；
Step 2, electroslag remelting: cutting off Steel ingot feeder head before remelting, removes its surface scale, is put in electricity as consutrode
Double refining is carried out in slag remelting apparatus；Electrode metal is fallen in crystallizer after melting through slag bath, then is frozen into steel ingot, steel ingot
Step crystallization from bottom to top, ingredient uniformly, dense structure；
Step 3, forging: above-mentioned processed steel ingot being heated to after 1200 DEG C of held for some time and is forged,
Generally >=10h, initial forging temperature are 1000 DEG C, and final forging temperature is 850 DEG C；
Step 4, annealing: after above-mentioned steel forgings blank is heated to 740 DEG C of held for some time, can according to steel ingot diameter,
Batch and charging mode are determined, and are as cold as coming out of the stove after 500 DEG C with the cooling rate furnace of 10 DEG C/s air-cooled；
Step 5, quenching and tempering heat treatment: hardening heat is 1000 DEG C, and tempering temperature is 500 DEG C, is tempered 2 times.
After above-mentioned manufacturing process, it is tested for the property:
(1) quenching hardness: 60-64HRC, tempering hardness 58-62HRC.
(2) impact ductility test:
Impact specimen is taken according to standard (GB/T 229-2007), specimen size is 10 × 10 × 55mm non-notch, room temperature
Impact toughness value: 200-220J.
(3) wearability is tested
Wear-resisting property is evaluated using pin disk-type friction Wear Tester, wear volume: 0.238-0.241mm3。
Embodiment 2
In the present embodiment, the chemical component mass percent of the pattern material with high strength cold stamping shaping dies steel of use is such as
Under:
Cold stamping shaping dies steel is prepared using following methods in the present embodiment:
Step 1 is smelted: carrying out ingredient, melting by mentioned component；
Step 2, electroslag remelting: cutting off Steel ingot feeder head before remelting, removes its surface scale, is put in electricity as consutrode
Double refining is carried out in slag remelting apparatus；Electrode metal is fallen in crystallizer after melting through slag bath, then is frozen into steel ingot, steel ingot
Step crystallization from bottom to top, ingredient uniformly, dense structure；
Step 3, forging: above-mentioned processed steel ingot being heated to after 1300 DEG C of held for some time and is forged,
Generally >=10h, initial forging temperature are 1100 DEG C, and final forging temperature is 950 DEG C；
Step 4, annealing: after above-mentioned steel forgings blank is heated to 840 DEG C of held for some time, can according to steel ingot diameter,
Batch and charging mode are determined, and are as cold as coming out of the stove after 600 DEG C with the cooling rate furnace of 15 DEG C/s air-cooled；
Step 5, quenching and tempering heat treatment: hardening heat is 1050 DEG C, and tempering temperature is 550 DEG C, is tempered 2 times.
After above-mentioned manufacturing process, it is tested for the property:
(1) quenching hardness: 61-65HRC, tempering hardness 58-62HRC.
(2) impact ductility test:
Impact specimen is taken according to standard (GB/T 229-2007), specimen size is 10 × 10 × 55mm non-notch, room temperature
Impact toughness value: 208-221J.
(3) wearability is tested
Wear-resisting property is evaluated using pin disk-type friction Wear Tester, wear volume: 0.242-0.245mm3。
Embodiment 3
In the present embodiment, the chemical component mass percent of the pattern material with high strength cold stamping shaping dies steel of use is such as
Under:
Cold stamping shaping dies steel is prepared using following methods in the present embodiment:
Step 1 is smelted: carrying out ingredient, melting by mentioned component；
Step 2, electroslag remelting: cutting off Steel ingot feeder head before remelting, removes its surface scale, is put in electricity as consutrode
Double refining is carried out in slag remelting apparatus；Electrode metal is fallen in crystallizer after melting through slag bath, then is frozen into steel ingot, steel ingot
Step crystallization from bottom to top, ingredient uniformly, dense structure；
Step 3, forging: above-mentioned processed steel ingot being heated to after 1250 DEG C of held for some time and is forged,
Generally >=10h, initial forging temperature are 1050 DEG C, and final forging temperature is 900 DEG C；
Step 4, annealing: after above-mentioned steel forgings blank is heated to 800 DEG C of held for some time, can according to steel ingot diameter,
Batch and charging mode are determined, and are as cold as coming out of the stove after 550 DEG C with the cooling rate furnace of 12 DEG C/s air-cooled；
Step 5, quenching and tempering heat treatment: hardening heat is 1020 DEG C, and tempering temperature is 530 DEG C, is tempered 2 times.
After above-mentioned manufacturing process, it is tested for the property:
(1) quenching hardness: 61-64HRC, tempering hardness 59-63HRC.
(2) impact ductility test:
Impact specimen is taken according to standard (GB/T 229-2007), specimen size is 10 × 10 × 55mm non-notch, room temperature
Impact toughness value: 205-222J.
(3) wearability is tested
Wear-resisting property is evaluated using pin disk-type friction Wear Tester, wear volume: 0.238-0.243mm3。
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of cold stamping shaping dies steel, which is characterized in that the cold stamping shaping dies is with ladle containing following alloy member
Element: C, Si, Mn, Cr, Mo, V, P, S and Fe, and the mass percent of each element are as follows: C 0.70~0.90%, Si 0.25~
0.50%, Mn 0.52~0.72%, Cr 4.00~6.00%, Mo 2.00~2.60%, V 0.30~0.80%, P≤
0.015%, S≤0.003%, Fe surplus.
2. cold stamping shaping dies steel according to claim 1, which is characterized in that the mass ratio of Cr, Mo and V are 9.9
~10.0:5~5.1:1.0~1.1.
3. a kind of preparation method of cold stamping shaping dies steel, which is characterized in that the preparation method comprises the following steps:
Step 1 is smelted: the mass percent of the chemical component of the cold stamping shaping dies steel are as follows: C 0.70~0.90%,
Si 0.25~0.50%, Mn 0.52~0.72%, Cr 4.00~6.00%, Mo 2.00~2.60%, V 0.30~
0.80%, P≤0.015%, S≤0.003%, Fe surplus carry out ingredient, melting；
Step 2, electroslag remelting: be put in electroslag remelting device using steel ingot obtained in step 1 as consutrode carry out it is secondary
Refining；Electrode metal is fallen in crystallizer after melting through slag bath, then is frozen into steel ingot, steel ingot Step crystallization from bottom to top, at
Divide uniform, dense structure；
Step 3, forging: the steel ingot handled through step 2 is reheated and is forged, steel forgings blank is obtained；
Step 4, annealing: steel forgings blank heating, heat preservation are come out of the stove air-cooled after furnace is cold；
Step 5, quenching and tempering heat treatment.
4. preparation method according to claim 3, which is characterized in that in the step 1, the mass ratio of Cr, Mo and V are
9.9~10.0:5~5.1:1.0~1.1.
5. preparation method according to claim 3, which is characterized in that in the step 3, the steel ingot is again heated to
It is forged after 1200-1300 DEG C of temperature range inside holding.
6. preparation method according to claim 3, which is characterized in that in the step 3, initial forging temperature 1000-1100
DEG C, final forging temperature is 850-950 DEG C.
7. preparation method according to claim 3, which is characterized in that in the step 4, the steel forgings blank is heated
To 740-840 DEG C of temperature range inside holding.
8. preparation method according to claim 3, which is characterized in that in the step 4, with the cooling rate furnace of 10-15 DEG C/s
It comes out of the stove after being as cold as 500-600 DEG C air-cooled.
9. preparation method according to claim 3, which is characterized in that in the step 5, hardening heat 1000-1050
DEG C, tempering temperature is 500-550 DEG C, is tempered 2 times.
10. application of the cold stamping shaping dies steel according to claim 1 in automobile manufacture, which is characterized in that institute
It states cold stamping shaping dies and is used as pattern material with high strength cold stamping shaping dies steel with steel.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702442A (en) * | 2019-03-11 | 2019-05-03 | 精利模塑科技（无锡）有限公司 | A kind of production method of precision rapid shaping auto electronics mold |
| CN110977346A (en) * | 2019-12-10 | 2020-04-10 | 苏州工业园区科海机电工程有限公司 | Steel product processing technology |
| CN112011740A (en) * | 2020-08-31 | 2020-12-01 | 天津钢研海德科技有限公司 | High-toughness and high-hardness die steel and preparation method thereof |
| CN115094337A (en) * | 2022-07-22 | 2022-09-23 | 上海大学(浙江)高端装备基础件材料研究院 | Ultrahigh-strength alloy steel, 19.8-grade threaded fastener and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108348A (en) * | 1987-10-19 | 1989-04-25 | Hitachi Metals Ltd | Low-alloy high-speed tool steel and its manufacture |
| CN101709427A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Low-cost, high-strength, high-toughness and high-abrasion resistance cold-working die steel and preparation method thereof |
| CN102691005A (en) * | 2011-03-25 | 2012-09-26 | 宝山钢铁股份有限公司 | Low alloy die steel |
| CN103276298A (en) * | 2013-06-09 | 2013-09-04 | 河冶科技股份有限公司 | High-hardness high-tenacity cold and hot work die steel and production method thereof |
| CN108660390A (en) * | 2017-03-27 | 2018-10-16 | 宝钢特钢有限公司 | A kind of high impact toughness cold work die steel and preparation method thereof |
-
2018
- 2018-09-28 CN CN201811139071.4A patent/CN109306434A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108348A (en) * | 1987-10-19 | 1989-04-25 | Hitachi Metals Ltd | Low-alloy high-speed tool steel and its manufacture |
| CN101709427A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Low-cost, high-strength, high-toughness and high-abrasion resistance cold-working die steel and preparation method thereof |
| CN102691005A (en) * | 2011-03-25 | 2012-09-26 | 宝山钢铁股份有限公司 | Low alloy die steel |
| CN103276298A (en) * | 2013-06-09 | 2013-09-04 | 河冶科技股份有限公司 | High-hardness high-tenacity cold and hot work die steel and production method thereof |
| CN108660390A (en) * | 2017-03-27 | 2018-10-16 | 宝钢特钢有限公司 | A kind of high impact toughness cold work die steel and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702442A (en) * | 2019-03-11 | 2019-05-03 | 精利模塑科技（无锡）有限公司 | A kind of production method of precision rapid shaping auto electronics mold |
| CN109702442B (en) * | 2019-03-11 | 2022-04-22 | 精利模塑科技（无锡）有限公司 | Manufacturing method of precise and rapid forming automobile electronic die |
| CN110977346A (en) * | 2019-12-10 | 2020-04-10 | 苏州工业园区科海机电工程有限公司 | Steel product processing technology |
| CN112011740A (en) * | 2020-08-31 | 2020-12-01 | 天津钢研海德科技有限公司 | High-toughness and high-hardness die steel and preparation method thereof |
| CN115094337A (en) * | 2022-07-22 | 2022-09-23 | 上海大学(浙江)高端装备基础件材料研究院 | Ultrahigh-strength alloy steel, 19.8-grade threaded fastener and preparation method thereof |
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Application publication date: 20190205 |