CN107557694A - A kind of pre-hardening plastic steel plate for die and its TMCP production methods - Google Patents
A kind of pre-hardening plastic steel plate for die and its TMCP production methods Download PDFInfo
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- CN107557694A CN107557694A CN201710590889.7A CN201710590889A CN107557694A CN 107557694 A CN107557694 A CN 107557694A CN 201710590889 A CN201710590889 A CN 201710590889A CN 107557694 A CN107557694 A CN 107557694A
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Abstract
The invention discloses a kind of pre-hardening plastic steel plate for die and its TMCP production methods, the steel plate chemical composition composition and its weight/mass percentage composition are：C：0.40~0.46%, Mn：0.80~1.10%, Si：0.80~1.10%, S≤0.015%, P≤0.020%, Cr：0.80~1.10%, Mo≤0.25%, Al：0.015~0.040%, remaining is iron and inevitable impurity；The production method includes rolling and refrigerating work procedure.Mo contents of the present invention are less than 0.25%, do not add the expensive alloying elements such as Ni, Nb, Ti, V, significantly reduce production cost；By cooling down red temperature after controlled rolling, without tempering heat treatment, the uniform rigidity between 28 34HRC can be obtained；With simple production process, Design of Chemical Composition is reasonable, properties of product are excellent the characteristics of.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of pre-hardening plastic steel plate for die and its TMCP producers
Method.
Background technology
Plastic die steel is widely used in electronics, family expenses as manufacture plastics, the mold materials of rubber
All kinds of industries such as electrical equipment, life appliance, automobile and motorcycle.Given in the Ministry of Metallurgical Industry's plastic steel plate for die standards of YB/T 107
The chemical composition of two conventional trades mark of SM3Cr2Mo, SM3Cr2Ni1Mo, U.S. ASTM P20 and the plastics of Sweden 718 are corresponded to respectively
Mould steel.Typically all delivered goods with pre-hardening state, hardness is controlled between 28-38HRC.
In general, the pre-hardening plastic mould steel capital is by quenched or TMCP（Thermo-mechanical rolling）Returned after rolling
Fiery heat-treating methods production.Hardening and tempering process first quenches, and carries out high tempering afterwards, and technique is most complicated；At TMCP+ tempering heat
Reason compared to hardening and tempering process eliminates quenching process, and comparatively process is simpler, but still suffer from production cost height, complex procedures,
The problem of time is long.
The invention provides a kind of method that pre-hardening plastic die steel is directly produced with TMCP, without tempering after rolling
Heat treatment, there is the characteristics of process is simple, and production cost is low.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of pre-hardening plastic steel plate for die；Present invention also offers one kind
The TMCP production methods of pre-hardening plastic steel plate for die.The present invention has that process is simple, does not add the valuable conjunction such as Ni, Nb, Ti, V
Gold element, the advantages of cost is low.
In order to solve the above technical problems, the present invention adopts the technical scheme that：A kind of pre-hardening plastic steel plate for die, it is described
Steel plate chemical composition forms and its weight/mass percentage composition is：C：0.40~0.46%, Mn：0.80~1.10%, Si：0.80~
1.10%, S≤0.015%, P≤0.020%, Cr：0.80~1.10%, Mo≤0.25%, Al：0.015~0.040%, remaining is iron
With inevitable impurity.
Steel plate thickness specification of the present invention is 15≤h≤100mm, and h is steel plate thickness.
Steel plate hardness of the present invention is between 28~34HRC, same steel plate hardness deviation≤3HRC.
The present invention also provides a kind of TMCP production methods of above-mentioned pre-hardening plastic steel plate for die, and methods described is continuous casting billet
By rolling and refrigerating work procedure, steel plate is obtained；The rolling process uses TMCP milling methods；It is thick that the refrigerating work procedure regards steel plate
Degree uses air cooling and water cooling two ways.
Continuous casting billet of the present invention refines, at RH vacuum refinings or VD vacuum by converter smelting or electric arc furnaces smelting, LF stoves
Reason or CAS-OB vacuum refinings, continuous casting working procedure obtain.Described converter smelting can also be provided just steel-making water, RH by electric arc furnace smelting
Vacuum refining can use the vacuum refinings such as VD applications of vacuum, CAS-OB to be de-gassed processing, it is therefore an objective to reduce the gas in molten steel
Content, particularly H content；Molten iron for converter smelting can use molten iron to pre-process depending on S contents height, it is ensured that enter converter molten iron
Sulfur content is below 0.050%；Continuous casting steel billet process described in the inventive method, continuously casting is obtained using water mold
Slab, it is heated to the raw material as follow-up TMCP rollings, smelting molten steel, LF refining, application of vacuum and continuous casting plate after certain temperature
Base belongs to the general technology of steel industry.
Rolling process of the present invention, is rolled using TMCP, 1150~1260 DEG C of heating-up temperature, finishing temperature 820~900
℃。
Refrigerating work procedure of the present invention, air cooling and water cooling two ways are used depending on steel plate thickness, for thickness h ＜ 30mm's
Steel plate uses air cooling.
Refrigerating work procedure of the present invention, air cooling and water cooling two ways, 30mm≤h ＜ 50mm thickness are used depending on steel plate thickness
Steel plate by the way of water cooling, after cooling steel plate red temperature be 600~650 DEG C.
Refrigerating work procedure of the present invention, air cooling and water cooling two ways, 50mm≤h ＜ 80mm thickness are used depending on steel plate thickness
Steel plate by the way of water cooling, after cooling steel plate red temperature be 550~600 DEG C.
Refrigerating work procedure of the present invention, air cooling and water cooling two ways, 80mm≤h≤100mm thickness are used depending on steel plate thickness
The steel plate of degree is by the way of water cooling, and steel plate red temperature is 500~550 DEG C after cooling.
The key of the described pre-hardening plastic die steel of TMCP methods production is the cooling red temperature after controlled rolling, is cooled down
To room temperature, without tempering heat treatment, detect hardness, hardness number between 28-34HRC, same steel plate hardness difference≤
3HRC, the requirement of pre-hardening plastic die steel can be met.
Pre-hardening plastic die steel detection method of the present invention refers to GB/T 230.1.
It is using beneficial effect caused by above-mentioned technical proposal：1st, the present invention is by the composition design of high silicon, can be with
Strengthen the heat/corrosion resistance of mould steel.2nd, Mn/Cr ratios and Si/Cr ratios of the present invention are controlled between 0.70-1.40, it is ensured that through hardening
Property.3rd, Mo contents of the present invention are less than 0.25%, do not add the expensive alloying elements such as Ni, Nb, Ti, V, significantly reduce and be produced into
This.4th, the present invention after controlled rolling by cooling down red temperature, without tempering heat treatment, can obtain between 28-34HRC
Uniform rigidity.5th, the inventive method has the characteristics of simple production process, Design of Chemical Composition are reasonable, properties of product are excellent.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 15mm forms and its weight/mass percentage composition is：
C：0.40%, Mn：0.80%, S：0.015%, P：0.010%, Si：0.80%, Al：0.015%, Cr：0.80%, Mo：0.10%, remaining
For iron and inevitable impurity；Mn/Cr and Si/Cr ratios are 1.
Production method includes converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting working procedure is rolled using TMCP
System, 1260 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 15mm thickness, and finishing temperature is 850 DEG C；
（2）Refrigerating work procedure：Cooled down using air cooling.
It is cooled to after room temperature without tempering heat treatment, it is 31~33HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 2
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 30mm forms and its weight/mass percentage composition is：
C：0.42%, Mn：0.80%, S：0.010%, P：0.020%, Si：1.10%, Al：0.015%, Cr：0.80%, Mo：0.20%, remaining
For iron and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 1 and 1.38.
Production method includes converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting working procedure is rolled using TMCP
System, 1240 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 30mm thickness, and finishing temperature is 820 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 650 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 30~32HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 3
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 50mm forms and its weight/mass percentage composition is：
C：0.42%, Mn：0.90%, S：0.009%, P：0.018%, Si：1.00%, Al：0.015%, Cr：0.95%, Mo：0.20%, remaining
For iron and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 0.95 and 1.05.
Production method includes converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting working procedure is rolled using TMCP
System, 1220 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 50mm thickness, and finishing temperature is 840 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 600 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 29~32HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 4
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 80mm forms and its weight/mass percentage composition is：
C：0.44%, Mn：1.00%, S：0.010%, P：0.020%, Si：1.10%, Al：0.015%, Cr：1.00%, Mo：0.22%, remaining
For iron and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 1 and 1.1.
Production method includes converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting working procedure is rolled using TMCP
System, 1260 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 80mm thickness, and finishing temperature is 880 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 550 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 28~31HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 5
The pre-hardening plastic steel plate for die chemical composition composition and its weight/mass percentage composition that the present embodiment thickness specification is 100mm
For：C：0.46%, Mn：1.10%, S：0.008%, P：0.015%, Si：0.80%, Al：0.015%, Cr：1.1%, Mo：0.25%, its
Yu Weitie and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 1 and 0.73.
Production method includes converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, RH vacuum refinings, continuous casting working procedure is rolled using TMCP
System, 1150 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 100mm thickness, and finishing temperature is 900 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 500 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 29~32HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 6
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 40mm forms and its weight/mass percentage composition is：
C：0.44%, Mn：1.00%, S：0.008%, P：0.015%, Si：0.80%, Al：0.040%, Cr：1.1%, Mo：0.25%, remaining is
Iron and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 0.91 and 0.73.
Production method includes converter smelting, the refining of LF stoves, VD applications of vacuum, continuous casting, rolling and refrigerating work procedure, concrete technology
Step is as described below：
（1）Rolling process：The continuous casting billet obtained through converter smelting, the refining of LF stoves, VD applications of vacuum, continuous casting working procedure is rolled using TMCP
System, 1180 DEG C of heating-up temperature, high-pressure water descaling before rolling are rolled to 40mm thickness, and finishing temperature is 870 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 600 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 28~30HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Embodiment 7
The pre-hardening plastic steel plate for die chemical composition that the present embodiment thickness specification is 70mm forms and its weight/mass percentage composition is：
C：0.41%, Mn：0.90%, S：0.008%, P：0.015%, Si：1.10%, Al：0.015%, Cr：0.80%, Mo：0.18%, remaining
For iron and inevitable impurity；Mn/Cr and Si/Cr ratios are respectively 0.82 and 1.38.
Production method includes electric arc furnace smelting, the refining of LF stoves, CAS-OB vacuum refinings, continuous casting, rolling and refrigerating work procedure, tool
Body technology step is as described below：
（1）Rolling process：The continuous casting billet obtained through electric arc furnace smelting, the refining of LF stoves, CAS-OB vacuum refinings, continuous casting working procedure uses
TMCP is rolled, 1210 DEG C of heating-up temperature, high-pressure water descaling before rolling, is rolled to 70mm thickness, and finishing temperature is 890 DEG C；
（2）Refrigerating work procedure：Using cooling by water, red temperature is controlled at 550 DEG C after water cooling.
It is cooled to after room temperature without tempering heat treatment, it is 31~34HRC to examine steel plate hardness, meets pre-hardening the modern designs of plastics
Has the requirement of steel.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
1. a kind of pre-hardening plastic steel plate for die, it is characterised in that the steel plate chemical composition composition and its weight/mass percentage composition
For：C：0.40~0.46%, Mn：0.80~1.10%, Si：0.80~1.10%, S≤0.015%, P≤0.020%, Cr：0.80~
1.10%, Mo≤0.25%, Al：0.015~0.040%, remaining is iron and inevitable impurity.
2. a kind of pre-hardening plastic steel plate for die according to claim 1, it is characterised in that the steel plate thickness specification is
15≤h≤100mm, h are steel plate thickness.
A kind of 3. pre-hardening plastic steel plate for die according to claim 1, it is characterised in that the steel plate hardness 28~
Between 34HRC.
4. a kind of pre-hardening plastic steel plate for die according to claim 1, it is characterised in that the steel plate, same steel
Plate hardness deviation≤3HRC.
5. based on a kind of TMCP production methods of pre-hardening plastic steel plate for die described in claim 1-4 any one, it is special
Sign is that methods described is that continuous casting billet passes through rolling and refrigerating work procedure, obtains steel plate；The rolling process uses TMCP rolling sides
Method；The refrigerating work procedure uses air cooling and water cooling two ways regarding steel plate thickness.
6. the TMCP production methods of a kind of pre-hardening plastic steel plate for die according to claim 5, it is characterised in that described
Continuous casting billet by converter smelting or electric arc furnaces smelting, the refining of LF stoves, RH vacuum refinings or VD applications of vacuum or CAS-OB vacuum refinings,
Continuous casting working procedure obtains.
7. the TMCP production methods of a kind of pre-hardening plastic steel plate for die according to claim 5, it is characterised in that described
Rolling process, rolled using TMCP, 1150~1260 DEG C of heating-up temperature, 820~900 DEG C of finishing temperature.
8. a kind of TMCP production methods of pre-hardening plastic steel plate for die according to claim 5-7 any one, it is special
Sign is, the refrigerating work procedure, uses air cooling and water cooling two ways depending on steel plate thickness, is adopted for thickness h ＜ 30mm steel plate
Use air cooling；The steel plate of 30mm≤h ＜ 50mm thickness is by the way of water cooling, and steel plate red temperature is 600~650 DEG C after cooling.
9. a kind of TMCP production methods of pre-hardening plastic steel plate for die according to claim 5-7 any one, it is special
Sign is, the refrigerating work procedure, air cooling and water cooling two ways, the steel plate of 50mm≤h ＜ 80mm thickness is used depending on steel plate thickness
By the way of water cooling, steel plate red temperature is 550~600 DEG C after cooling.
10. a kind of TMCP production methods of pre-hardening plastic steel plate for die according to claim 5-7 any one, it is special
Sign is, the refrigerating work procedure, air cooling and water cooling two ways, the steel plate of 80mm≤h≤100mm thickness is used depending on steel plate thickness
By the way of water cooling, steel plate red temperature is 500~550 DEG C after cooling.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467989A (en) * | 2018-02-22 | 2018-08-31 | 唐山钢铁集团有限责任公司 | A kind of easily welding pre-hardening plastic steel plate for die and its production method |
| CN109468545A (en) * | 2018-12-24 | 2019-03-15 | 唐山中厚板材有限公司 | One kind plus the high polishability pre-hardening plastic steel plate for die of ni-type and its production method |
| CN111112342A (en) * | 2020-01-03 | 2020-05-08 | 广东韶钢松山股份有限公司 | Die steel rolling process and die steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690955A (en) * | 1979-12-20 | 1981-07-23 | Hitachi Zosen Corp | Medium-carbon low-alloy cast steel for die cutting edge |
| JP2001220646A (en) * | 2000-02-08 | 2001-08-14 | Hitachi Metals Ltd | Prehardened steel for plastic molding die |
| JP2005082813A (en) * | 2003-09-04 | 2005-03-31 | Daido Steel Co Ltd | Prehardened steel for plastic molding die |
| CN102312168A (en) * | 2011-07-01 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Prehardening plastic die steel plate and manufacture method thereof |
| CN105063512A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Plastic die steel and manufacturing method thereof |
| CN106811687A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Economical plastic die steel plate and manufacturing method thereof |
-
2017
- 2017-07-19 CN CN201710590889.7A patent/CN107557694B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690955A (en) * | 1979-12-20 | 1981-07-23 | Hitachi Zosen Corp | Medium-carbon low-alloy cast steel for die cutting edge |
| JP2001220646A (en) * | 2000-02-08 | 2001-08-14 | Hitachi Metals Ltd | Prehardened steel for plastic molding die |
| JP2005082813A (en) * | 2003-09-04 | 2005-03-31 | Daido Steel Co Ltd | Prehardened steel for plastic molding die |
| CN102312168A (en) * | 2011-07-01 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Prehardening plastic die steel plate and manufacture method thereof |
| CN105063512A (en) * | 2015-08-26 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Plastic die steel and manufacturing method thereof |
| CN106811687A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Economical plastic die steel plate and manufacturing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467989A (en) * | 2018-02-22 | 2018-08-31 | 唐山钢铁集团有限责任公司 | A kind of easily welding pre-hardening plastic steel plate for die and its production method |
| CN108467989B (en) * | 2018-02-22 | 2019-10-25 | 唐山钢铁集团有限责任公司 | A kind of easily welding pre-hardening plastic steel plate for die and its production method |
| CN109468545A (en) * | 2018-12-24 | 2019-03-15 | 唐山中厚板材有限公司 | One kind plus the high polishability pre-hardening plastic steel plate for die of ni-type and its production method |
| CN111112342A (en) * | 2020-01-03 | 2020-05-08 | 广东韶钢松山股份有限公司 | Die steel rolling process and die steel |
| CN111112342B (en) * | 2020-01-03 | 2021-08-31 | 广东韶钢松山股份有限公司 | Die steel rolling process and die steel |
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| CN107557694B (en) | 2018-12-18 |
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