CN109811251A - A kind of high polishing pre-hardening mould steel and its preparation process - Google Patents
A kind of high polishing pre-hardening mould steel and its preparation process Download PDFInfo
- Publication number
- CN109811251A CN109811251A CN201811255376.1A CN201811255376A CN109811251A CN 109811251 A CN109811251 A CN 109811251A CN 201811255376 A CN201811255376 A CN 201811255376A CN 109811251 A CN109811251 A CN 109811251A
- Authority
- CN
- China
- Prior art keywords
- forging
- mould steel
- high polishing
- steel
- hardening mould
- 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.)
- Pending
Links
Landscapes
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a kind of high polishing pre-hardening mould steel and its preparation processes, the height polishes the constituent that pre-hardening mould steel uses and its mass percent is as follows: C 0.15~0.20%, Si 0.40~0.80%, Mn 0.80~1.20%, Cr 0.80~1.20%, Ni 0.10~0.30%, Mo 0.150~0.250%, V≤0.10%, P < 0.015%, S < 0.005%, Fe surplus；The preparation process of inventive die steel is as follows: ingredient, smelting, pouring, hot sending；The heat treatment of high temperature expanding heat, then multiway forging hot-working, heat treatment after forging, sawing.The present invention has the advantages that inventive die steel has low cost, high harden ability, high rigidity, high polishing performance and dermatoglyph etching performance.
Description
Technical field
The invention belongs to technical field of alloy steel, are related to a kind of plastic mould steel, in particular to a kind of high polishing pre-hardening
Mould steel and its preparation process.
Background technique
It is increasing to the dosage of mold with the rapid development of China's manufacturing industry, to the performance requirement of mold materials
It is higher and higher, especially high polishing performance and machinability.It is used in the production of auto manufacturing, household electrical appliances, electronic communication etc.
To mold.These molds require to have high polishing performance and processing performance, and used at present is Japanese Datong District NAK80 steel mostly
Or 1.2343 the materials such as steel manufacture these molds.But NAK80 steel plasticity is poor, is not suitable for type chamber complexity or type chamber is deeper
Mold, and polishing process is required stringent.And 1.2343 steel machine difficulty of processing are big, the mold manufacturing process multicycle is long,
This will greatly increase the manufacturing cost of these automobile products.Under global economy bottom fan's environment since especially 2012, save
Resource and reduce the big bottleneck that cost is auto manufacturing.
Under such international and domestic environment, therefore, inexpensive high polishing pre-hardening plastic mould steel is developed, to replace
The NAK80 steel or 1.2343 mould steel of import, are necessary.
For above-mentioned phenomenon, 107587081 A of patent CN discloses a kind of high polishing pre-hardening mould steel and its preparation work
Skill, which polishes the constituent that pre-hardening mould steel uses and its mass percent is as follows: C 0.21~0.25%, Si≤
0.30%, Mn 1.40~2.00%, Cr 1.30~1.70%, Ni 0.60~1.00%, Mo 0.40~0.60%, V≤0.10%, P
< 0.015%, S < 0.005%, Nb 0.02~0.04%, Fe surplus；The preparation process of the invention mould steel is as follows: ingredient, smelting
Refining, pouring, hot sending；The heat treatment of high temperature expanding heat, then multiway forging hot-working, heat treatment after forging, sawing；It finally carries out quenched
Heat treatment, obtain 38~42HRC of hardness tempered martensite, and prepare mould steel have low cost, high harden ability,
High rigidity, high polishing performance and dermatoglyph etching performance；But there are still certain disadvantages for the patent of invention: firstly, steel grade Ni
Higher with Mo content, corresponding manufacturing cost is just higher, especially smelting cost；Secondly as steel grade alloying element C,
Cr, Ni, Mo higher, component segregation is serious, and finished product die steel uniformity of hardness and polishing performance are poorer than steel grade of the present invention, uncomfortable
Higher mold, such as car light is required to touch together in production polishing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high polishing pre-hardening mould steel of low cost and its preparation processes.
In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of high polishing pre-hardening mould steel, innovative point
Be: the constituent and its mass percent that the high polishing pre-hardening mould steel uses are as follows: C 0.15~0.20%, Si
0.40~0.80%, Mn 0.80~1.20%, Cr 0.80~1.20%, Ni 0.10~0.30%, Mo 0.150~0.250%, V
≤ 0.10%, P < 0.015%, S < 0.005%, Fe surplus.
Further, the constituent and its best in quality percentage that the high polishing pre-hardening mould steel uses are as follows: C
0.18%, Si 0.60%, Mn 1.00%, Cr 1.00%, Ni 0.20%, Mo 0.20%, V 0.05%, P < 0.012%, S <
0.003%, Fe surplus.
A kind of preparation process of above-mentioned high polishing pre-hardening mould steel, innovative point are: the preparation process includes
Following steps:
(1) smelt: by the constituent and its mass percent of high polishing pre-hardening mould steel carry out ingredient, electric arc furnace smelting and
Then refining carries out vacuum outgas and casting, finally demoulding hot sending forge furnace；
(2) High temperature diffusion is heat-treated: being heated to 1180~1250 DEG C, soaking time is 10~20h after arriving warm samming；
(3) it forges hot-working: 850~1200 DEG C will be cooled to by the steel ingot of High temperature diffusion heat treatment, in this temperature range
Multiway forging processing is carried out, forging method is pulled out using two upsettings two, forges compression ratio >=3, total forging ratio >=5, final forging temperature >=850
℃；
(4) heat treatment after forging: air-cooled after forging or mist is cold, then fills annealing furnace tempering, 500~600 DEG C of heating temperature, keeps the temperature
It 30~40 hours, is then furnace-cooled to 150 DEG C or less and comes out of the stove；
(5) sawing: detecting a flaw and sawing both ends, cuts off forging both ends defect, and check forging surface quality, removes surface defect.
Further, in the High temperature diffusion heat treatment step, heating uses stepped heating mode, guarantees temperature inside and outside steel ingot
Degree is uniform, i.e., respectively in 600 DEG C, 800 DEG C and 1100 DEG C isothermals；High temperature diffusion heat treatment guarantees that alloying elements distribution is more equal in steel
It is even, in 1180~1250 DEG C of temperature isothermals after High temperature diffusion heat treatment, when steel ingot temperature uniformly after carry out conducting forging processing.
The present invention has the advantages that the high polishing pre-hardening mould steel of the present invention, utilizes Si- Mn- Cr- Mo alloying
Feature takes full advantage of the effect of Si-Mn, in conjunction with the alloying action feature of more alloying elements such as Cr- Mo, reducing carbon
Increase suitable alloy element Si in the steel of content, improve the harden ability and uniformity of hardness of steel, and with Europe superscript 1.2738
The problem of steel compares, and improves component segregation and distribution of carbides, improves the uniformity of hardness of steel；Suitable Mo and Cr member
Element, it is ensured that steel hardenability with higher, and formula through the invention can get the tempered martensite of 28~36HRC of hardness
Tissue.
Firstly, steel grade Ni and Mo content are higher, corresponding manufacturing cost is just higher, especially smelting cost；Secondly,
Due to steel grade alloying element C, Cr, Ni, Mo higher, component segregation is serious, finished product die steel uniformity of hardness and polishability
Can be poorer than steel grade of the present invention, it is not suitable for production polishing and higher mold, such as car light is required to touch
In conjunction with the above feature, steel grade Ni of the present invention and Mo content are reduced, and corresponding manufacturing cost just reduces, especially smelt at
This；Secondly, steel grade alloying element C, Cr, Ni, Mo of the present invention are accordingly reduced, slow down component segregation phenomenon, finished product die steel
Uniformity of hardness and polishing performance greatly improve, this is China's manufacturing industry especially auto manufacturing and household electrical appliances and electronic communication system
It makes industry and brings huge contribution, and improve China's mould steel manufacture level and the market competitiveness.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that embodiment height polishes pre-hardening alloying mould steel CCT curve.
Fig. 2 is that embodiment height polishes pre-hardening mould steel tempering characteristics curve.
Fig. 3 is the metallographic structure that embodiment height polishes pre-hardening mould steel.
Fig. 4 is that 1.2738 steel surface polishing of import can detect case.
Fig. 5 is that embodiment height polishes pre-hardening mould steel polishing performance detection case.
Fig. 6 and Fig. 7 is that embodiment height polishes pre-hardening mould steel dermatoglyph etching case.
Specific embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Embodiment
In the present embodiment, the constituent and its mass percent that height polishing pre-hardening mould steel uses are as follows: C0.18%,
Si0.60%, Mn1.00%, Cr1.00%, Mo0.20%, Ni 0.20%, V0.05%, P 0.011%, S0.002%, Fe surplus.
The technical process of high polishing pre-hardening mould steel is produced using the material in the embodiment and steps are as follows:
(1) smelt: by the constituent and its mass percent of high polishing pre-hardening mould steel carry out ingredient, electric arc furnace smelting and
Then refining carries out vacuum outgas and casting, finally demoulding hot sending forge furnace；
(2) High temperature diffusion is heat-treated: steel ingot being classified to heating in forge furnace, i.e., respectively at 600 DEG C, 800 DEG C, 1100 DEG C
Isothermal, finally heated to be warming up to 1180~1250 DEG C, soaking time is 10~20h after arriving warm samming；
(3) it forges hot-working: 850~1200 DEG C will be cooled to by the steel ingot of High temperature diffusion heat treatment, in this temperature range
Multiway forging processing is carried out, forging method is pulled out using two upsettings two, forges compression ratio >=3, total forging ratio >=5, final forging temperature >=850
℃；
(4) heat treatment after forging: air-cooled after forging or mist is cold, then fills annealing furnace tempering, 500~600 DEG C of heating temperature, keeps the temperature
It 30~40 hours, is then furnace-cooled to 150 DEG C or less and comes out of the stove；
(5) sawing: detecting a flaw and sawing both ends, cuts off forging both ends defect, and check forging surface quality, removes surface defect.
The present embodiment height polishes pre-hardening mould steel after above-mentioned smelting and forging hot-working and heat treatment, final finished
Specification is (long * wide * is thick) 2500mm*1300mm*850mm module, and sampling is tested for the property:
A phase-change characteristic:
The CCT curve that the present embodiment height polishes pre-hardening mould steel is as shown in Fig. 1.
B tempering characteristics:
The tempering characteristics curve that the present embodiment height polishes pre-hardening mould steel is as shown in Fig. 2.
C microscopic structure:
The microscopic structure that the present embodiment height polishes pre-hardening mould steel is as shown in Fig. 3.
D polishing performance:
The present embodiment height polishes shown in polishing performance detection the case such as attached drawing 5 and table 1 of pre-hardening mould steel, 1.2738 steel of import
Polishing performance detection case such as attached drawing 4 and table 1 shown in；By Fig. 4 and Fig. 5 as it can be seen that the present embodiment height polishes pre-hardening mould steel
With excellent polishing performance.
The polishing performance testing result of 1 the present embodiment height of table polishing pre-hardening mould steel and 1.2738 steel of import
As can be seen from the above table, the present embodiment obtains the tempered martensite of hardness 39.7HRC.
E dermatoglyph etching performance:
The dermatoglyph that the present embodiment height polishes pre-hardening mould steel etches case, as seen in figs. 6 and 7.As it can be seen that it should by Fig. 6 and Fig. 7
Steel has preferable dermatoglyph etching performance.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (4)
1. a kind of high polishing pre-hardening mould steel, it is characterised in that: the constituent that the high polishing pre-hardening mould steel uses
And its mass percent is as follows: C 0.15~0.20%, Si 0.40~0.80%, Mn 0.80~1.20%, Cr 0.80~
1.20%, Ni 0.10~0.30%, Mo 0.150~0.250%, V≤0.10%, P < 0.015%, S < 0.005%, Fe surplus.
2. high polishing pre-hardening mould steel according to claim 1, it is characterised in that: the high polishing pre-hardening mould steel
The constituent and its best in quality percentage of use are as follows: C 0.18%, Si 0.60%, Mn 1.00%, Cr 1.00%, Ni
0.20%, Mo 0.20%, V 0.05%, P < 0.012%, S < 0.003%, Fe surplus.
3. a kind of preparation process of high polishing pre-hardening mould steel described in claim 1, it is characterised in that: the preparation process
Include the following steps:
(1) smelt: by the constituent and its mass percent of high polishing pre-hardening mould steel carry out ingredient, electric arc furnace smelting and
Then refining carries out vacuum outgas and casting, finally demoulding hot sending forge furnace；
(2) High temperature diffusion is heat-treated: being heated to 1180~1250 DEG C, soaking time is 10~20h after arriving warm samming；
(3) it forges hot-working: 850~1200 DEG C will be cooled to by the steel ingot of High temperature diffusion heat treatment, in this temperature range
Multiway forging processing is carried out, forging method is pulled out using two upsettings two, forges compression ratio >=3, total forging ratio >=5, final forging temperature >=850
℃；
(4) heat treatment after forging: air-cooled after forging or mist is cold, then fills annealing furnace tempering, 500~600 DEG C of heating temperature, keeps the temperature
It 30~40 hours, is then furnace-cooled to 150 DEG C or less and comes out of the stove；
(5) sawing: detecting a flaw and sawing both ends, cuts off forging both ends defect, and check forging surface quality, removes surface defect.
4. the preparation process of high polishing pre-hardening mould steel according to claim 3, it is characterised in that: the High temperature diffusion
In heat treatment step, heating uses stepped heating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811255376.1A CN109811251A (en) | 2018-10-26 | 2018-10-26 | A kind of high polishing pre-hardening mould steel and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811255376.1A CN109811251A (en) | 2018-10-26 | 2018-10-26 | A kind of high polishing pre-hardening mould steel and its preparation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109811251A true CN109811251A (en) | 2019-05-28 |
Family
ID=66602248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811255376.1A Pending CN109811251A (en) | 2018-10-26 | 2018-10-26 | A kind of high polishing pre-hardening mould steel and its preparation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109811251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295332A (en) * | 2019-07-05 | 2019-10-01 | 天津钢研海德科技有限公司 | A kind of pre- hard mold steel of the high mirror surface of high tenacity and its manufacturing process |
| CN110923574A (en) * | 2019-12-13 | 2020-03-27 | 河南中原特钢装备制造有限公司 | Low-carbon easy-to-weld corrosion-resistant plastic die steel and manufacturing method thereof |
| CN116219279A (en) * | 2022-12-23 | 2023-06-06 | 鞍钢股份有限公司 | High-strength high-toughness steel for nuclear reactor containment vessel and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1576382A (en) * | 2003-06-26 | 2005-02-09 | 斗山重工业株式会社 | Steel for plastic injection moulding die with excellent mechanical workability |
| JP2008121032A (en) * | 2006-11-08 | 2008-05-29 | Daido Steel Co Ltd | Die steel superior in spheroidizing annealing property and hardenability |
| KR20150014729A (en) * | 2013-07-30 | 2015-02-09 | 현대제철 주식회사 | Plastic die steel and method of manufacturing the same |
| CN106086691A (en) * | 2016-05-13 | 2016-11-09 | 如皋市宏茂重型锻压有限公司 | A kind of boron micro-alloyed mould steel and preparation technology thereof |
-
2018
- 2018-10-26 CN CN201811255376.1A patent/CN109811251A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1576382A (en) * | 2003-06-26 | 2005-02-09 | 斗山重工业株式会社 | Steel for plastic injection moulding die with excellent mechanical workability |
| JP2008121032A (en) * | 2006-11-08 | 2008-05-29 | Daido Steel Co Ltd | Die steel superior in spheroidizing annealing property and hardenability |
| KR20150014729A (en) * | 2013-07-30 | 2015-02-09 | 현대제철 주식회사 | Plastic die steel and method of manufacturing the same |
| CN106086691A (en) * | 2016-05-13 | 2016-11-09 | 如皋市宏茂重型锻压有限公司 | A kind of boron micro-alloyed mould steel and preparation technology thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295332A (en) * | 2019-07-05 | 2019-10-01 | 天津钢研海德科技有限公司 | A kind of pre- hard mold steel of the high mirror surface of high tenacity and its manufacturing process |
| CN110923574A (en) * | 2019-12-13 | 2020-03-27 | 河南中原特钢装备制造有限公司 | Low-carbon easy-to-weld corrosion-resistant plastic die steel and manufacturing method thereof |
| CN116219279A (en) * | 2022-12-23 | 2023-06-06 | 鞍钢股份有限公司 | High-strength high-toughness steel for nuclear reactor containment vessel and manufacturing method thereof |
| CN116219279B (en) * | 2022-12-23 | 2024-04-16 | 鞍钢股份有限公司 | High-strength high-toughness steel for nuclear reactor containment vessel and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532154B (en) | High rigidity height polishing pre-hardening plastic mould steel and preparation technology thereof | |
| CN106086691A (en) | A kind of boron micro-alloyed mould steel and preparation technology thereof | |
| CN104046921B (en) | Super-section Pre-Bainitic sclerosis plastic mould steel and preparation method thereof | |
| CN107587081A (en) | A kind of high polishing pre-hardening mould steel and its preparation technology | |
| Chang et al. | Influence of hot press forming techniques on properties of vehicle high strength steels | |
| CN105861942B (en) | A kind of cold work die steel and its preparation technology | |
| CN109811251A (en) | A kind of high polishing pre-hardening mould steel and its preparation process | |
| CN103774042B (en) | A kind of CSP high magnetic induction grain-oriented silicon steel and preparation method thereof | |
| CN105274448A (en) | Highly polished pre-hardening plastic die steel and manufacturing process thereof | |
| CN109504896A (en) | A kind of cupric height polishing pre-hardening plastic mould steel and its preparation process | |
| CN101280394A (en) | High-silicon low-carbon high-heat resistance hot work die steel | |
| CN101476082B (en) | High performance low cost hot work die steel | |
| CN109852880A (en) | A kind of high heat-intensity hot-work die steel and its manufacturing method | |
| CN110257689A (en) | A kind of high polishing pre-hardening plastic mould steel and its preparation process | |
| CN112795843A (en) | Hot work die steel and preparation method thereof | |
| CN108774712A (en) | Superelevation thermal conductivity hot stamping die steel and its manufacturing method | |
| CN104294144B (en) | Steel for automobile rim having tensile strength equal to or greater than 380MPa and production method of steel | |
| CN107365948A (en) | A kind of cold working die steel material and preparation method thereof | |
| CN108193023B (en) | Method for eliminating network carbide in annealing microstructure of H13 die steel | |
| CN107794348A (en) | A kind of Technology for Heating Processing of raising Cr12MoV steel combination properties | |
| CN101638750A (en) | Martensitic stainless steel for cutting tool and manufacturing method thereof | |
| CN107557688A (en) | A kind of high toughness cold working die steel | |
| CN105950991A (en) | Copper-bearing high-polishing die steel and preparing technology thereof | |
| CN107747056B (en) | A kind of hot rolling+tempering bainite steel and production method | |
| CN109023113B (en) | Variable-strength hot stamping die material and preparation method and application thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190528 |
|
| RJ01 | Rejection of invention patent application after publication |