CN106811687B - A kind of economical plastic steel plate for die and manufacturing method - Google Patents
A kind of economical plastic steel plate for die and manufacturing method Download PDFInfo
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- CN106811687B CN106811687B CN201510870739.2A CN201510870739A CN106811687B CN 106811687 B CN106811687 B CN 106811687B CN 201510870739 A CN201510870739 A CN 201510870739A CN 106811687 B CN106811687 B CN 106811687B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 229920003023 plastic Polymers 0.000 title claims abstract description 31
- 239000004033 plastic Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 239000004615 ingredient Substances 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 229910052796 boron Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 241001417490 Sillaginidae Species 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims 1
- 238000005496 tempering Methods 0.000 abstract description 11
- 238000005275 alloying Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910001214 P-type tool steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching Effects 0.000 description 4
- 230000001131 transforming Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910001563 bainite Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000576 supplementary Effects 0.000 description 2
- 210000001519 tissues Anatomy 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Abstract
The present invention provides a kind of economical plastic steel plate for die and manufacturing method, the steel plate ingredient is as follows by weight percentage：C：0.40% 0.50%, Si:0.40% 0.70%, Mn:1.10% 1.50%, Cr:0.60% 0.80%, Mo:0.10% 0.20%, B:0.001% 0.0012%, P<0.020%, S<0.015%, surplus is Fe and inevitable impurity.Manufacturing method：Smelting, continuous casting, heating stove heat, rolling, cooling, heat treatment, 1,080 1150 DEG C of strand start rolling temperature, 840 910 DEG C of finishing temperature；Water cooling after the completion of rolling, opens 750 800 DEG C of cold temperature, and 500 550 DEG C of red temperature is air-cooled to room temperature after water cooling；450 600 DEG C of tempering of steel plate, 1.5 2.5min/mm of soaking time after cooling.The present invention obtains the uniform plastic steel plate for die of section hardness, and hardness number is suitable with plastic die steel 3Cr2Mo, and maximum cross-section difference of hardness is within 5HRC.
Description
Technical field
The invention belongs to metal material production field more particularly to a kind of economical plastic steel plate for die and manufacturing methods.
Background technology
Plastic mould is the important equipment of plastics forming process, and the main material for making plastic mould is the modern designs of plastics
Has steel.In recent years, with the rapid development of China's plastics industry, the demand of plastic die steel is increasing, meanwhile, in order to carry
The service life of high mold, the quality of machining accuracy and plastic products, the requirement to mold steel quality are higher and higher.Traditional
Plastic die steel mostly uses the supply of material of pre-hardening state, i.e., the plastic die steel module after hot-working is carried out modifier treatment in advance,
The hardness range finally used is reached, can carry out deforming caused by modifier treatment again after processing is completed to avoid mold, open
The defects of splitting, but there is also the disadvantages of hardening flaw sensibility height, production cost height, production cycle length.Currently, research is a kind of
Plastic die steel inexpensive, with short production cycle becomes new research hotspot, and produces some related patents and document.
《A kind of economical Micro Alloying microalloyed plastic-mould steel plate and its manufacturing method》(201310654945.0), should
Disclosure of invention is that continuous casting billet is refined and poured into a mould by converter smelting, LF+RH, continuous casting billet is heated, controlled rolling and controlled cooling, tempering
Etc. processes, be made plastic steel plate for die, section hardness 310-350HB.But it is disadvantageous in that, 1.7% is contained in ingredient
Cr, its production cost can be increased.
《A kind of plastic die steel process for producing thick plate of Micro Alloying》(201110218086.1) disclosure of invention
For using processes such as converter smelting, LF+RH refinings, cast continuous casting billet, heating, rolling, cooling control after rolling, tempering, the modern designs of plastics are made
Have steel plate, section hardness 300-340HB.But it is disadvantageous in that, containing 2.0% Cr in ingredient, equally makes its cost
Increase.
《A kind of high tougness die steel for plastics and its production method》(application number：201310713051.4) invention use is just
The heat treatment process of fire+tempering produces die steel, and product hardness reaches 28-32HRC.But it is disadvantageous in that, ingredient
Equally contain the elements such as higher Cr, Mo, and using the technique of normalizing+tempering, its production cost can be further increased, extend life
Produce the period.
《A kind of pre-hardened plastic mold steel and its manufacturing method》(application number：201110209430.0) disclosure is
Molding cast, and the processes such as heated, rolling, cooling and tempering are used after smelting, and obtain section hardness 30-40HRC's
Steel plate.But it is disadvantageous in that the production cycle using molding extending steel plate, and section hardness maximum difference reaches 10HRC, it cannot
Meet the requirement of high terminal mould.
Document " influence of the big section non-quenching and tempering plastic mold steel tissue to uniformity of hardness,《Material heat treatment journal》,
Volume 2008,29, the 4th phase ", " organization and performance of big section Micro Alloying and quenched pre-hardened plastic mold steel compare,《Machinery
Engineering material》, volume 2008,32, supplementary issue 1 ", " wear-resisting property of bulk Micro Alloying pre-hardened plastic mold steel,《At metal fever
Reason》, volume 2012,37, the 5th phase " and a kind of non-quenching and tempering plastic mold steel is reported, which contains the elements such as higher Cr, Mo.Text
Offer " research and development of P20M Micro Alloying plastic molds,《Mechanical engineering material》, volume 2011,35, supplementary issue 1 " report it is a kind of it is low at
This plastic die steel obtains final products by smelting, pouring into a mould the techniques such as steel ingot, cogging, finish rolling, and production technology is complicated, produces
Period is long.
The above invention of comparison and document are it is found that the production of plastic die steel at present is primarily present following deficiency.
(1) alloying element is higher in steel, increases the production cost of plastic steel plate for die.
(2) production technology is complicated, and the production cycle of extending steel plate increases production cost.
(3) steel plate section hardness maximum difference is bigger than normal, cannot meet the requirement of high terminal mould.
Invention content
It is an object of the invention to overcome the above problem with it is insufficient and the modeling that a kind of production cost is low, with short production cycle is provided
Expect mold steel plate and its manufacturing method.
What present disclosure was realized in：
A kind of economical plastic steel plate for die, the ingredient of the steel plate are as follows by weight percentage：C：0.40%-
0.50%, Si:0.40%-0.70%, Mn:1.10%-1.50%, Cr:0.60%-0.80%, Mo:0.10%-0.20%, B:
0.001%-0.0012%, P<0.020%, S<0.015%, surplus is Fe and inevitable impurity.
Effect to contained component in the economical plastic steel plate for die of the present invention below and range of choice concrete analysis are said
It is bright.
C：The maximally efficient element of hardness and strength of steel is improved, solution strengthening effect is notable, and the present invention is by the weight hundred of C
Divide content control in 0.40%-0.50%.
Si：The essential elements of deoxidation in steel making, solid solution ability is stronger in steel, can play certain invigoration effect, this hair
The bright weight percentage by Si is controlled in 0.40%-0.70%.
Mn：Suitable Mn can delay steel grade ferrite and pearlite to change, and steel grade quenching degree is significantly increased, and the present invention will
The weight percentage of Mn is controlled in 1.0%-1.5%.
Mo：Molybdenum is solid-solution in matrix postpones ferrite and pearlite transformation strongly, is conducive to the formation of bainite structure, this
Invention controls the weight percentage of Mo in 0.10%-0.20%.
Cr：Cr is one of intensified element important in steel.It is strong to postpone perlitic transformation, promote bainitic transformation, improves
The hardness of steel.Effect becomes apparent from when Cr, Mo are added simultaneously, but Cr too high levels reduce bainite transformation temperature, and increases carbon and work as
Amount.The present invention controls the weight percentage of Cr in 0.60%-0.80%.
B：Boron can significantly improve steel plate quenching degree；It and the compound additions of Mo help to obtain bayesian in very wide cooling rate range
Body tissue, but too high levels can form carbide, and the weight percentage control of B is added ranging from the present invention in selection
0.001%-0.0012%.
A kind of manufacturing method of economical plastic steel plate for die, including smelting, continuous casting, heating stove heat, rolling, cooling,
Heat treatment,
(1) it smelts：The steel of mentioned component is smelted, obtains continuous casting billet after continuous casting, the processing of LF and RH refining furnaces is more than
10min, middle packet molten steel overheat≤20 DEG C, whole process protection casting；
(2) stove heat is heated：Gained strand in (1) is heated in heating furnace, 1150 DEG C -1250 of heating temperature
DEG C, soaking time is more than 2h；
(3) it rolls：The strand that heating is completed is rolled, using high temperature, the rolling mode of heavy reduction, start rolling temperature
1080 DEG C -1150 DEG C, 840 DEG C -910 DEG C of finishing temperature, percentage pass reduction 20%-35%；
(4) cooling：Steel plate after the completion of rolling is subjected to water cooling, opens 750 DEG C -800 DEG C of cold temperature, 500 DEG C of red temperature -
550 DEG C, room temperature is air-cooled to after water cooling；
(5) it is heat-treated：The cooling steel plate completed is tempered at 450 DEG C -600 DEG C, soaking time 1.5-2.5min/
mm。
Using the beneficial effects of the present invention are：The present invention is reduced by reducing the content of the precious metals elements such as Cr, Mo
Cost of material, the content for increasing C, Mn element in steel improve the intensity of steel, meanwhile, add the through hardening that cheap B element improves steel
Property.By techniques such as controlled rolling and controlled cooling, tempering, the uniform plastic steel plate for die of section hardness, hardness number and plastics are finally obtained
Mould steel 3Cr2Mo is suitable, and maximum cross-section difference of hardness is within 5HRC.
Description of the drawings
Fig. 1 is the micro-organization chart of the embodiment of the present invention 1.
Specific implementation mode
Below by embodiment, the present invention is further illustrated.Following embodiment is only some optimal realities of the present invention
Mode is applied, there are not any restrictions to aforementioned invention range and technological means.
The embodiment of the present invention is smelted according to the component proportion of technical solution, is continuous casting, heating stove heat, rolling, cold
But it, is heat-treated.The ingredient of steel of the embodiment of the present invention is shown in Table 1.The heating of the strand of steel of the embodiment of the present invention, rolling technological parameter are shown in
Table 2.The tempering process and section hardness value of steel plate of the embodiment of the present invention are shown in Table 3.
The ingredient (wt%) of 1 steel of the embodiment of the present invention of table
| C | Si | Mn | Cr | Mo | B | P | S | |
| Embodiment 1 | 0.41 | 0.6 | 1.35 | 0.62 | 0.13 | 0.0011 | 0.010 | 0.006 |
| Embodiment 2 | 0.45 | 0.55 | 1.2 | 0.68 | 0.10 | 0.0012 | 0.012 | 0.006 |
| Embodiment 3 | 0.48 | 0.5 | 1.45 | 0.6 | 0.12 | 0.001 | 0.011 | 0.007 |
| Embodiment 4 | 0.44 | 0.64 | 1.33 | 0.65 | 0.18 | 0.0011 | 0.010 | 0.005 |
| Embodiment 5 | 0.47 | 0.66 | 1.15 | 0.75 | 0.11 | 0.001 | 0.012 | 0.007 |
The heating of the strand of 2 steel of the embodiment of the present invention of table, rolling technological parameter
3 steel plate of embodiment of the present invention tempering process of table and section hardness value
| Temperature/DEG C | Soaking time/min/mm | Steel plate section hardness range/HRC | |
| Embodiment 1 | 550 | 2 | 28-30 |
| Embodiment 2 | 500 | 2.5 | 29-31 |
| Embodiment 3 | 450 | 1.5 | 28-32 |
| Embodiment 4 | 480 | 2 | 29-32 |
| Embodiment 5 | 520 | 2 | 28-31 |
Claims (1)
1. a kind of economical plastic steel plate for die, which is characterized in that the ingredient of the steel plate is as follows by weight percentage：C：
0.41%-0.48%, Si:0.40%-0.70%, Mn:1.10%-1.50%, Cr:0.60%-0.80%, Mo:0.10%-
0.13%, B:0.001%-0.0012%, P<0.020%, S<0.015%, surplus is Fe and inevitable impurity；
The manufacturing method of the economical plastic steel plate for die, including smelting, continuous casting, heating stove heat, rolling, cooling, heat
Processing,
(1) it smelts：The steel of mentioned component is smelted, obtains continuous casting billet after continuous casting, the processing of LF and RH refining furnaces is more than
10min, middle packet molten steel overheat≤20 DEG C, whole process protection casting；
(2) stove heat is heated：Gained strand in (1) is heated in heating furnace, 1150-1250 DEG C of heating temperature, heat preservation
Time is more than 2h；
(3) it rolls：The strand that heating is completed is rolled, 1080 DEG C -1150 DEG C of start rolling temperature, 840 DEG C -910 of finishing temperature
DEG C, percentage pass reduction 20%-35%；
(4) cooling：Steel plate after the completion of rolling is subjected to water cooling, opens 750 DEG C -800 DEG C of cold temperature, 510 DEG C -550 of red temperature
DEG C, room temperature is air-cooled to after water cooling；
(5) it is heat-treated：The cooling steel plate completed is tempered at 450 DEG C -600 DEG C, soaking time 1.5-2min/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870739.2A CN106811687B (en) | 2015-12-02 | A kind of economical plastic steel plate for die and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870739.2A CN106811687B (en) | 2015-12-02 | A kind of economical plastic steel plate for die and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106811687A CN106811687A (en) | 2017-06-09 |
| CN106811687B true CN106811687B (en) | 2018-08-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174896A (en) * | 1996-04-29 | 1998-03-04 | 克罗索·洛利工业责任有限公司 | Low alloy steel for manufacture of moulds for plastics |
| CN102268599A (en) * | 2011-08-01 | 2011-12-07 | 南京钢铁股份有限公司 | Production technology of non-modulated plastic die steel thick plate |
| KR101302693B1 (en) * | 2012-10-17 | 2013-09-03 | 주식회사 세아베스틸 | Plastic mold steel with uniform hardness and workability by reducing segregation |
| CN103757544A (en) * | 2013-12-05 | 2014-04-30 | 南京钢铁股份有限公司 | Economical non-quenched and non-tempered micro-alloyed plastic die steel plate and making method thereof |
| CN104451417A (en) * | 2014-12-31 | 2015-03-25 | 广东韶钢松山股份有限公司 | Production process of high-cleanliness non-quenched and tempered plastic mold thick steel plate |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1174896A (en) * | 1996-04-29 | 1998-03-04 | 克罗索·洛利工业责任有限公司 | Low alloy steel for manufacture of moulds for plastics |
| CN102268599A (en) * | 2011-08-01 | 2011-12-07 | 南京钢铁股份有限公司 | Production technology of non-modulated plastic die steel thick plate |
| KR101302693B1 (en) * | 2012-10-17 | 2013-09-03 | 주식회사 세아베스틸 | Plastic mold steel with uniform hardness and workability by reducing segregation |
| CN103757544A (en) * | 2013-12-05 | 2014-04-30 | 南京钢铁股份有限公司 | Economical non-quenched and non-tempered micro-alloyed plastic die steel plate and making method thereof |
| CN104451417A (en) * | 2014-12-31 | 2015-03-25 | 广东韶钢松山股份有限公司 | Production process of high-cleanliness non-quenched and tempered plastic mold thick steel plate |
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