CN105525078B - A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties - Google Patents
A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties Download PDFInfo
- Publication number
- CN105525078B CN105525078B CN201510776761.0A CN201510776761A CN105525078B CN 105525078 B CN105525078 B CN 105525078B CN 201510776761 A CN201510776761 A CN 201510776761A CN 105525078 B CN105525078 B CN 105525078B
- Authority
- CN
- China
- Prior art keywords
- steel
- forging
- cooling
- 4cr5mosiv1
- notched impact
- 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.)
- Active
Links
Abstract
The present invention relates to a kind of 4Cr5MoSiV1 hot die steels, more particularly to a kind of method of raising 4Cr5MoSiV1 hot-work die Steel Properties.The present invention uses electric furnace smelting, vacuum carbon deoxidization, top of the slag diffusive deoxidation is refined, control addition pure rare earth La and Ce under the conditions of oxygen, argon for protecting pouring, produce total oxygen content as little as 12ppm high-cleanness steel ingot, steel ingot is through spreading homogenizing anneal, three jumping-ups of three-dimensional, pulling forging, water after forging, the alternately quick cooling of empty gas double-medium, rapid cooling+spheroidizing process after superhigh temperature austenitizing is carried out before quenching, it is not less than 590 DEG C of 23 tempering after quenching, obtain the stable tempered structure of 4Cr5MoSiV1 hot die steels, the single notched impact properties KV2 >=25J of 4Cr5MoSiV1 hot die steels, average notched impact properties KV2 >=30J, single non-notch ballistic work >=280J, average non-notch ballistic work >=320J, it is horizontal, the high-performance of the ratio between longitudinal non-notch ballistic work >=93%, splendid iso quality level.
Description
Technical field
It is more particularly to a kind of to improve 4Cr5MoSiV1 Forming Dies the present invention relates to a kind of 4Cr5MoSiV1 hot die steels
Has the preparation method of Steel Properties.
Background technology
Mould is manufacturing important foundation technological equipment, and Tool and Die Technology level has turned into weighs a national product manufacture
One of important symbol of industry level, with the development of Chinese mold manufacturing industry, the development of China's mould steel is very rapid, mould steel
Grades Series constantly improve, quality level and production technology equipment have significant progress, still, for die casting use
Steel, it is general using similar domestic 4Cr5MoSiV1 such as H13 in the world, due to the special working environment of compression mod, it is desirable to which mould has
There are excellent Testing Tensile Strength at Elevated Temperature, outstanding high temperature abrasion resistance, enough toughness and hot-cracking resistance.It is multiple for manufactured parts structure
Product miscellaneous, of large quantities, from the product of esbablished corporation in the world, such as Sweden ASSAB more than mold materials（Assab）, Austria
BOHLER (hundred Lu), Germany GROEDITZ (Ge Lizi) etc..Domestic similar products are unqualified because of production technology, material mechanical performance
Index is low, and general hardness is in 45 ± 1HRC, single notched impact properties KV2 >=8J, average notched impact properties KV2 >=15J,
The ratio between single non-notch ballistic work >=90, average notched impact properties >=160J, horizontal, longitudinal non-notch ballistic work≤70%, it is this
Quality condition has had a strong impact on combination property and the mold use life-span of material.To break external monopolization, the height of China is set up
Quality die steel material, relies on equipment and technical force's progress research and development of products that enterprise has.
The content of the invention
It is an object of the invention to provide a kind of method of raising 4Cr5MoSiV1 hot-work die Steel Properties, prepared by this method
Hot die steel when possessing hardness and reaching 45 ± 1HRC, single notched impact properties KV2 >=25J, average notched impact properties
KV2 >=30J, single non-notch ballistic work >=280J, average non-notch ballistic work >=320J, horizontal, longitudinal non-notch ballistic work it
Than >=93%.
Technical solution
A kind of method of raising 4Cr5MoSiV1 hot-work die Steel Properties, it is characterised in that after multiway forging and forging
Water, empty gas double-medium are alternately cooled and prepare high performance, splendid iso 4Cr5MoSiV1 hot die steels.
A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties is as follows：
1）Steel-making：
Molten steel is refined using electric furnace smelting, through vacuum carbon deoxidization, the abundant diffusive deoxidation of the top of the slag, makes free oxygen≤6ppm, so
La and Ce of the oxygen content less than 80ppm lucium are added afterwards, and La and Ce weight ratio are 3:7, while rare earth La and Ce
Account for molten steel total amount and reach 0.02%, and through argon for protecting pouring, produce total oxygen content as little as 12ppm, non-metallic inclusion individual event
≤ 1 grade, it is slightly, is carefully the high-cleanness steel ingot that field trash sum distinguishes≤2 grades；
2）Ingot annealing：
By step 1）In steel ingot be heated to 1250~1280 DEG C, the diffusion homogenizing anneal of insulation 25~30 hours；
3）Forging：
After steel ingot is handled through High temperature diffusion after annealing, tri- direction jumping-ups of X, Y, Z, pulling are carried out, upset ratio is 2.0, is pulled out
X after length：Y：Z=2：1.5：1；
4）Cooling after forged：
Forging is completed after forging, it is ensured that when forging temperature is not less than 900 DEG C, quickly enters water-filling, empty gas double-medium alternating cold
But, water cooling 60~90 seconds, air cooling 60~90 seconds；Water cooling 60~90 seconds, air cooling 60~90 seconds, such circulating cooling for several times, workpiece
Surface highest rise temperature is 320 DEG C -380 DEG C, 320 DEG C -500 DEG C of the temperature of workpiece interface after water outlet；
5）Property heat treatment：
The workpiece of cooling after forged increases superhigh temperature rapid cooling+spheroidizing process before quenching, to obtain the crystalline substance of fine uniform
Grain and tissue, carry out being not less than 590 DEG C after quenching 2-3 times are tempered, and soaking time 2-3h/100mm makes retained austenite abundant
It is changed into tempered sorbite, the tempered structure stablized；Hardness reaches 45 ± 1HRC, single notched impact properties KV2 >=
25J, average notched impact properties KV2 >=30J, single non-notch ballistic work >=280J, average non-notch ballistic work >=320J,
The ratio between horizontal, longitudinal non-notch ballistic work >=93%；
La and Ce of the rare earth using oxygen content less than 80ppm lucium, La and Ce weight ratio are 3:7,
Rare earth La and Ce account for molten steel total amount and reach 0.02% simultaneously.
The effect of invention
1）Material is used is less than addition oxygen content with electric furnace smelting, the refining of vacuum carbon deoxidization technology, RE-treated addition
100ppm, controls non-metallic inclusion（Particularly Ds type impurities）, argon for protecting pouring, the 4Cr5MoSiV1 steel finally refined
Total oxygen content as little as 12ppm, non-metallic inclusion individual event≤1 grade is slightly, is carefully the high-cleanness that field trash sum distinguishes≤2 grades
Steel ingot.
2）Steel ingot is by heating, the diffusion annealing that homogenizes, tri- direction jumping-ups of progress X, Y, Z, the forging of pulling three-dimensional, quenching
Tissue prepares, repeatedly tempering, can effectively improve the uniformity of steel, improves anisotropy, the horizontal stroke of 4Cr5MoSiV1 mould steel, longitudinal direction
The ratio between non-notch ballistic work >=93%, notable crystal grain thinning, the grain size of 4Cr5MoSiV1 mould steel reaches more than 9 grades.
3）Workpiece through property heat treatment, hardness reaches 45 ± 1HRC, single notched impact properties KV2 >=25J, average
Notched impact properties KV2 >=30J, single non-notch ballistic work >=280J, average non-notch ballistic work >=320J.
The combination property of steel reaches international quality of materials level, fully meets use requirement.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Embodiment
Embodiment 1
1）Molten steel is refined using electric furnace smelting, the refining of LF stoves and through vacuum carbon deoxidization, the abundant diffusive deoxidation of the top of the slag, makes freedom
The mixture of oxygen≤6ppm, then La and Ce that addition oxygen content is 60ppm, La and Ce weight ratio are 3:7, while rare earth La
Account for molten steel total amount with Ce and reach 0.02%, realize cleaning molten steel, it is rotten be mingled with microalloying three zones, and through atmosphere protection
Cast, prevents molten steel secondary oxidation.；
2）Step 1）Steel ingot the demoulding after be heat-fed forge, be heated to 1250-1260 DEG C, the insulation of 25-27 hours
Homogenizing anneal is spread, mitigates C, Cr, Mo, V component segregation in steel, reduction banded structure rank by spreading, to improve intensity
With etc. tropism lay the foundation；
3）Step 2）Steel ingot carry out respectively three-dimensional tri- direction jumping-ups of X, Y, Z, pulling, upset ratio is 2.0, X after pulling：
Y：Z=2：1.5：1；Steel ingot is fully forged in three directions, thus weaken metal streamline generation it is each to difference, carry
The ratio between the horizontal of 4Cr5MoSiV1 mould steel, longitudinal direction non-notch ballistic work are simultaneously reached more than 93% by high material compactness；
4）Step 3）4Cr5MoSiV1 steel belong to hypereutectoid steel, according to the TTT of 4Cr5MoSiV1 steel scheme, it is ensured that forging
When temperature is not less than 900 DEG C, quickly enters water-filling, empty gas double-medium and be alternately cooled, water cooling 80~90 seconds, air cooling 70~80 seconds, such as
For several times, surface highest rise temperature is 320 DEG C -380 DEG C to this circulating cooling after workpiece water outlet, 320 DEG C of the temperature of workpiece interface -
500 DEG C, prevent the precipitation of net carbon and the generation of cooling crack；Highest rise temperature in surface is less than 320 DEG C after workpiece water outlet of the present invention
When, cracked because occurring martensite transfor mation, when surface highest rise temperature is higher than 500 DEG C after workpiece water outlet, workpiece crystal boundary
Place easily forms continuous net-shaped carbide；
5）Step 4）Forging roughing after be transferred to property heat treatment, first carry out superhigh temperature austenitizing after rapid cooling+ball
Annealing process, carry out being not less than 590 DEG C again to obtain the crystal grain and tissue of fine uniform, after quenching 2 times are tempered, during insulation
Between 2h/100mm, retained austenite is fully changed into tempered sorbite, the tempered structure stablized；Hardness reaches 45 ±
1HRC, single notched impact properties KV2 >=25J, average notched impact properties KV2 >=30J, single non-notch ballistic work >=
The ratio between 280J, average non-notch ballistic work >=320J, horizontal, longitudinal non-notch ballistic work >=93%；
Mechanical experimental results are shown in Table 1, table 2.
The 4Cr5MoSiV1 mould steel non-notch impact property testing results of table 2
Embodiment 2
1）Molten steel is refined using electric furnace smelting, the refining of LF stoves and through vacuum carbon deoxidization, the abundant diffusive deoxidation of the top of the slag, makes freedom
The mixture of oxygen≤6ppm, then La and Ce that addition oxygen content is 50ppm, La and Ce weight ratio are 3:7, while rare earth La
Account for molten steel total amount with Ce and reach 0.02%, realize cleaning molten steel, it is rotten be mingled with microalloying three zones, and through atmosphere protection
Cast, prevents molten steel secondary oxidation.；
2）Step 1）Steel ingot the demoulding after be heat-fed forge, be heated to 1260-1280 DEG C, the insulation of 26-28 hours
Homogenizing anneal is spread, mitigates C, Cr, Mo, V component segregation in steel, reduction banded structure rank by spreading, to improve intensity
With etc. tropism lay the foundation；
3）Step 2）Steel ingot carry out respectively three-dimensional tri- direction jumping-ups of X, Y, Z, pulling, upset ratio is 2.0, X after pulling：
Y：Z=2：1.5：1；Steel ingot is fully forged in three directions, thus weaken metal streamline generation it is each to difference, carry
The ratio between the horizontal of 4Cr5MoSiV1 mould steel, longitudinal direction non-notch ballistic work are simultaneously brought up to more than 93% by high material compactness；
4）Step 3）4Cr5MoSiV1 steel belong to hypereutectoid steel, according to the TTT of 4Cr5MoSiV1 steel scheme, it is ensured that forging
When temperature is not less than 900 DEG C, quickly enters water-filling, empty gas double-medium and be alternately cooled, water cooling 80~90 seconds, air cooling 80~90 seconds, such as
For several times, surface highest rise temperature is 320 DEG C -380 DEG C to this circulating cooling after workpiece water outlet, 320 DEG C of the temperature of workpiece interface -
500 DEG C, prevent the precipitation of net carbon and the generation of cooling crack；Highest rise temperature in surface is less than 320 DEG C after workpiece water outlet of the present invention
When, cracked because occurring martensite transfor mation, when surface highest rise temperature is higher than 500 DEG C after workpiece water outlet, workpiece crystal boundary
Place easily forms continuous net-shaped carbide；
5）Step 4）Forging roughing after be transferred to property heat treatment, first carry out superhigh temperature austenitizing after rapid cooling+ball
Annealing process, carry out being not less than 590 DEG C again to obtain the crystal grain and tissue of fine uniform, after quenching 2 times are tempered, during insulation
Between 2h/100mm, retained austenite is fully changed into tempered sorbite, the tempered structure stablized；Hardness reaches 45 ±
1HRC, single notched impact properties KV2 >=25J, average notched impact properties KV2 >=30J, single non-notch ballistic work >=
The ratio between 280J, average non-notch ballistic work >=320J, horizontal, longitudinal non-notch ballistic work >=93%；
Mechanical experimental results are shown in Table 3, table 4.
Claims (1)
1. a kind of method of raising 4Cr5MoSiV1 hot-work die Steel Properties, it is characterised in that water after forging and forge by three-dimensional,
Empty gas double-medium be alternately cooled prepare high-performance, etc. tropism reach more than 93% 4Cr5MoSiV1 hot die steels, preparation side
Method comprises the following steps：
1）Steel-making：
Molten steel is refined using electric furnace smelting, through vacuum carbon deoxidization, the abundant diffusive deoxidation of the top of the slag, makes free oxygen≤6ppm, Ran Houjia
Enter La and Ce of the oxygen content less than 80ppm lucium, La and Ce weight ratio are 3:7, while rare earth La and Ce account for steel
Water inventory reaches 0.02%, and through argon for protecting pouring, produces total oxygen content as little as 12ppm, non-metallic inclusion individual event≤1
Level, is slightly, is carefully the high-cleanness steel ingot that field trash sum distinguishes≤2 grades；
2）Ingot annealing：
By step 1）In Heating Steel Ingots to 1250 DEG C -1280 DEG C, the insulation diffusion homogenizing anneal of 25~30 hours；3）Forging
Make：
By step 2）Steel ingot after middle homogenizing anneal, carries out tri- direction jumping-ups of X, Y, Z, pulling, upset ratio is 2.0, pulling
X afterwards：Y：Z=2：1.5：1；
4）Cooling after forged：
Forging is completed after forging, it is ensured that when forging temperature is not less than 900 DEG C, is quickly entered water-filling, empty gas double-medium and is alternately cooled, water
Cold 60~90 seconds, air cooling 60~90 seconds；Water cooling 60~90 seconds, air cooling 60~90 seconds, such circulating cooling for several times, after workpiece water outlet
Highest rise temperature in surface is 320 DEG C -380 DEG C, 320 DEG C -500 DEG C of the temperature of workpiece interface；
5）Property heat treatment：
The workpiece of cooling after forged increases superhigh temperature rapid cooling+spheroidizing process before quenching, with obtain fine uniform crystal grain and
Tissue, carry out being not less than 590 DEG C after quenching 2-3 times is tempered, and soaking time 2-3h/100mm makes retained austenite fully change
For tempered sorbite, the tempered structure stablized；Hardness reaches 45 ± 1HRC, single notched impact properties KV2 >=25J, flat
Equal notched impact properties KV2 >=30J, single non-notch ballistic work >=280J, average notched impact properties >=320J；Horizontal, longitudinal direction
The ratio between non-notch ballistic work >=93%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776761.0A CN105525078B (en) | 2015-11-15 | 2015-11-15 | A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776761.0A CN105525078B (en) | 2015-11-15 | 2015-11-15 | A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105525078A CN105525078A (en) | 2016-04-27 |
| CN105525078B true CN105525078B (en) | 2017-11-03 |
Family
ID=55767600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510776761.0A Active CN105525078B (en) | 2015-11-15 | 2015-11-15 | A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525078B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521124A (en) * | 2016-08-26 | 2017-03-22 | 湖北东舟重工科技股份有限公司 | Forked flattening, upsetting, and rolling H13 hot-working die steel homogenization forging technology |
| CN106350643B (en) * | 2016-11-14 | 2018-11-16 | 成都先进金属材料产业技术研究院有限公司 | A kind of large mold Heat-Treatment of Steel method |
| CN107699789B (en) * | 2017-08-24 | 2019-04-05 | 唐山志威科技有限公司 | A kind of high tenacity, high thermal stability ZW866 hot die steel for die-casting and preparation method thereof |
| CN107574295A (en) * | 2017-10-17 | 2018-01-12 | 安徽金兰压铸有限公司 | Aluminium alloy casting die steel production technology |
| CN108193023B (en) * | 2017-12-01 | 2020-03-27 | 内蒙古北方重工业集团有限公司 | Method for eliminating network carbide in annealing microstructure of H13 die steel |
| CN108246945A (en) * | 2017-12-13 | 2018-07-06 | 陕西宏远航空锻造有限责任公司 | A kind of forging method for improving heat-resisting steel forgings impact property |
| CN111283125B (en) * | 2018-12-10 | 2022-07-22 | 天津天大高芯科技有限公司 | Process method for producing core rod by directly forging continuous casting billet |
| CN110863140B (en) * | 2019-11-06 | 2020-12-29 | 北京科技大学 | Low-alloy ultrahigh-strength structural steel and preparation method thereof |
| CN111020152A (en) * | 2019-12-03 | 2020-04-17 | 雷晓芳 | Manufacturing method of hot-work die steel |
| CN111390079A (en) * | 2020-03-13 | 2020-07-10 | 中铝沈阳有色金属加工有限公司 | Preparation method of ultra-large TC4 alloy cake |
| CN113493885A (en) * | 2020-04-01 | 2021-10-12 | 东莞市奥利瓦钢材模具有限公司 | High-performance hot-work die steel and preparation method thereof |
| CN111485091A (en) * | 2020-04-16 | 2020-08-04 | 东北特殊钢集团股份有限公司 | Pre-hardening method for oversized plastic die steel |
| CN112226587A (en) * | 2020-09-02 | 2021-01-15 | 杭州和源精密工具有限公司 | Manufacturing method of maintenance-free gold-type tool clamping plate |
| CN112439857A (en) * | 2020-10-29 | 2021-03-05 | 陕西长羽航空装备有限公司 | Forming method for improving three-dimensional performance of aluminum alloy |
| CN113444976B (en) * | 2021-07-15 | 2022-01-18 | 安徽工业大学 | High-carbon high-aluminum steel for drilling and lock making and preparation method thereof |
| CN116377186B (en) * | 2023-04-19 | 2023-11-07 | 浙江天基重工机械有限公司 | Preparation method of plastic die steel |
| CN116516119A (en) * | 2023-05-29 | 2023-08-01 | 扬州诚德重工有限公司 | Process for rapidly producing large thick plate by hot working die steel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650020A (en) * | 2012-05-14 | 2012-08-29 | 上海大学 | High-silicon high-manganese type high-thermal stability hot work die steel and thermal treatment process thereof |
| CN103243268A (en) * | 2013-05-09 | 2013-08-14 | 内蒙古北方重工业集团有限公司 | High-quality H13 rear earth mold steel and production method thereof |
| CN103397148B (en) * | 2013-07-30 | 2014-12-24 | 上海交通大学 | Method for formulating water-air alternate time-controlled quenching process |
| CN103993223A (en) * | 2014-05-06 | 2014-08-20 | 上海大学 | Ultrahigh thermal conductivity wear-resistant hot stamping die steel and manufacturing method thereof |
| CN104818424B (en) * | 2015-03-25 | 2017-04-12 | 内蒙古北方重工业集团有限公司 | High-quality H13 rare earth die steel and production method thereof |
-
2015
- 2015-11-15 CN CN201510776761.0A patent/CN105525078B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105525078A (en) | 2016-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105525078B (en) | A kind of preparation method of raising 4Cr5MoSiV1 hot-work die Steel Properties | |
| CN102837165B (en) | Manufacturing method for final-stage driving gear of high-power coal mining machine | |
| CN103276298B (en) | It is high hard that high-ductility is cold and hot doubles as die steel and production method thereof | |
| CN106086673B (en) | A kind of hot-work die steel plate and preparation method thereof | |
| CN103014534B (en) | Cast hot work die steel and processing method thereof | |
| CN110172641B (en) | Fine-grain high-toughness hot-work die steel and preparation method thereof | |
| CN104046915A (en) | Large-section high-performance hot work die steel for die casting and preparation technology thereof | |
| CN104532154A (en) | High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof | |
| CN107653416B (en) | One kind having high tenacity, high iso advanced hot die steel ZW868 | |
| CN103774049B (en) | High-ductility high wear-resistant height chromium ledeburite cold-work die steel and preparation method thereof | |
| CN102653837A (en) | High-toughness wear-resistant cold-working die steel and preparation method thereof | |
| CN110157988A (en) | High-purity, the homogeneous rare earth cold roll steel alloy material of one kind and preparation method | |
| CN106636861B (en) | The preparation technology of high-alloy hot work mould steel | |
| CN107779746A (en) | Ultrahigh-intensity high-toughness is anti-corrosion resistance to oxidation Ultra-fine Grained steel alloy and preparation method thereof | |
| CN102953000B (en) | A kind of ultrahigh-strength steel plates and manufacture method thereof | |
| CN102899589A (en) | High-strength non-tempered bainite steel and preparation method thereof | |
| CN101440462A (en) | Economical long service life material for mechanical press forging die and manufacturing method thereof | |
| CN107365948A (en) | A kind of cold working die steel material and preparation method thereof | |
| CN106399861A (en) | Alloy for high-pressure eighth-grade partition board outer ring and forging method of outer ring | |
| CN104099517B (en) | A kind of manufacture method of 225MPa ranks low-yield building aseismicity steel | |
| CN113737106B (en) | Die steel for 1500MPa hot stamping part cold trimming punching cutter and preparation method thereof | |
| CN103993144A (en) | Method for production of H13 die steel by bloom continuous casting | |
| CN104109800B (en) | High intensity is containing vanadium height manganese nonmagnetic steel and production method thereof | |
| CN108950413A (en) | A kind of die steel material and preparation method thereof and purposes | |
| CN105603303B (en) | A kind of high strength ultra-thick steel plates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |