CN110408855A - A kind of high performance plastics mould steel and its manufacturing method - Google Patents
A kind of high performance plastics mould steel and its manufacturing method Download PDFInfo
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- CN110408855A CN110408855A CN201910804468.9A CN201910804468A CN110408855A CN 110408855 A CN110408855 A CN 110408855A CN 201910804468 A CN201910804468 A CN 201910804468A CN 110408855 A CN110408855 A CN 110408855A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The present invention proposes a kind of high performance plastics mould steel and its manufacturing method, its weight percent composition: C 0.35-0.4%, S≤0.01%, P≤0.02%, Si 0.9-1.0%, Mn 1.2-1.3%, Cr 14.5-15.0%, Ni 0.05-0.09%, Mo 0.51-0.6%, V 0.1-0.15%, Ti 0.04-0.06%, N 0.03-0.05%, Ca 0.001-0.03%, Ba 0.001-0.05%, Al 0.001-0.01%, calsibar alloy 1-1.5%, surplus Fe;Manufacturing method includes smelting, ingot casting hot forging, heat treatment after forging step；The mould steel manufacturing cost is low, high comprehensive performance, excellent wear-resisting property, hardness height and few surface defects.
Description
Technical field
The invention belongs to mould steel technical field of alloy, and in particular to a kind of plastic die steel and its manufacturing method.
Background technique
Mould steel is the steel grade for manufacturing the molds such as hot-forging die, cold-punching mould and compression mod.Often add in production process
Add alloying elements to improve the performance of mould steel, to meet performance requirement of the mould steel under different operating environment.Work
Environment difference, intensity, toughness, wearability, harden ability, hardness and corrosion resistance of mould steel etc. can all have different want
It asks.
Plastic die steel is a kind of mould steel for plastic production.Steel for Plastic Die is cover extensively, from common iron
Have to special steel.This is more obvious at plastic mould initial stage, nowadays increasingly regular and advanced.Plastic mould material is main
Based on mould steel, the development of mould steel has pushed industrial products to advanced, personalized, diversified and high added value direction
Development.
State Intellectual Property Office discloses a kind of high-plasticity corrosion-resistance pre-hardened plastic mold steel
(CN201510680982.8), in the mould steel each component weight percent are as follows: C:0.3-0.4%, Mn:1.5-2.0%,
Ni:2.0-3.0%, V:0.3-0.4%, Mo:0.3-0.4%, Cr:4.0-5.0%, In:0.4-0.5%, Co:0.3-0.4%,
S :≤0.01%, P≤0.02%, composite modifier: 0.01-0.02%, remaining is Fe and inevitable impurity.
State Intellectual Property Office also discloses a kind of high abrasion pre-hardened plastic mold steel (CN201510680853.9), should
The weight percent of each component in mould steel are as follows: C:0.3-0.5%, Si:0.1-0.3%, Mn:1-1.5%, Mo:0.1-
0.2%, Sr:0.1-0.2%, Al:0.03-0.04%, Ti:1.2-1.5%, Cr:0.04-0.05%, P≤0.03%, S≤
0.03%, composite modifier: 0.01-0.02%, remaining is Fe and inevitable impurity.
State Intellectual Property Office also discloses a kind of plastic die steel (CN201711407339.3): the plastic die steel
Chemical component in each main alloy element mass percent be carbon 0.26-0.42%, silicon 0.30-1.20%, manganese 0.2-
1.30%, chromium 1.40-5.50%, molybdenum 0.45-1.50%, vanadium 0.08-1.20%, nickel 0.8-1.0%, remaining is iron.
Plastic die steel is more demanding to metallurgical quality, therefore the procedure calls such as smelting, processing and heat treatment are very strict.
With market to plastic products demand be continuously increased and keen competition brought by performance improve and cost reduce etc.
Problem, it is desirable that plastic mould will have the performances such as higher wearability, high rigidity, high corrosion-resistant and few surface defects to meet modeling
Expect the long lifetime of mold.
Summary of the invention
Invention broadly provides a kind of high-performance mould steel and its manufacturing method, the mould steel manufacturing cost is low, wear-resisting
Function admirable, hardness height and few surface defects.Its technical solution is as follows:
A kind of mold steel alloy material comprising the elemental constituent of following weight percent: C 0.35-0.4%, S≤
0.01%, P≤0.02%, Si 0.9-1.0%, Mn 1.2-1.3%, Cr 14.5-15.0%, Ni 0.05-0.09%, Mo
0.51-0.6%, V 0.1-0.15%, Ti 0.04-0.06%, N 0.03-0.05%, Ca 0.001-0.03%, Ba
0.001-0.05%, Al 0.001-0.01%, calsibar alloy 1-1.5%, surplus Fe.
Preferably, the calsibar alloy ingredient is Si 40.0-45.0%, Ca 15.0-20.0%, Al 3.0-
5.0%, Ba 25.0-30.0%.
The manufacturing method of above-mentioned mold steel alloy material, the method includes heat after smelting ingot casting, ingot casting hot forging and forging
Processing step, the smelting ingot casting step using mineral hot furnace+AOD+LF furnace specifically, smelted, specifically are as follows: the smelting in mineral hot furnace
It refines ferrochrome molten iron, and molten iron temperature is maintained within the temperature range of AOD refining furnace enters ferrochrome molten iron needed for furnace, convert
Enter the alloying operation that AOD furnace carries out decarburization, desulfurization, nitrogen flushing alloying and addition calsibar alloy and vanadium titanium etc.；Turn after tapping
Enter the refining of LF furnace, carries out alloying and temperature control operation, come out of the stove at 1550~1600 DEG C of temperature, molten steel is poured into ingot mould
In, refining mold steel ingot is obtained, refining steel ingot is 3t-6t.
Preferably, the ingot casting hot forging step specifically: first heat refining mold steel ingot obtained by smelting ingot casting step
To 1150-1200 DEG C, 2-5h is kept the temperature, cogging initial forging temperature is 1050-1200 DEG C, and final forging temperature is 900-1000 DEG C, is delayed after forging
It is cold, and anneal in time, obtain the round billet of required specification.
Preferably, heat treatment after forging includes spheroidizing and modifier treatment:
A, spheroidizing: being warming up to 880-900 DEG C of heat preservation 2-3h, is subsequently cooled to 740-760 DEG C of heat preservation 3-4h, then cool down
Room temperature is air-cooled to 550 DEG C hereinafter, coming out of the stove；
B, modifier treatment: 830-850 DEG C of preheating insulation 2-4h, after be warming up to 1060-1080 DEG C, keep the temperature 1-2h, oil quenching；It quenches
It is tempered immediately after fire, tempering temperature is 470-520 DEG C, keeps the temperature 2-4h, comes out of the stove and be air-cooled to room temperature.
Each element ingredient and its effect are as follows in alloy of the present invention:
Carbon: carbon is a kind of interstitial element, and the intensity of mould steel is remarkably improved by solution strengthening.But carbon is excessively high, can make
The toughness of steel reduces；And carbon is too low, and can reduce the intensity of steel；Therefore, C content range of the present invention is 0.35-0.4%.
Chromium: Cr is most important alloying element in mould steel, and the harden ability of mould steel, hardness, wearability and resistance to can be improved
Corrosivity etc. makes steel have preferable comprehensive mechanical property.The invention patent Cr content range is 14.5-15.0%.
Nickel: the harden ability, intensity and toughness of mould steel can be improved in appropriate Ni, inhibits ferritic formation, improves steel also
Corrosion resisting property in originality medium has heat-resisting and antirust ability under the high temperature conditions.Ni content range is 0.05- in this patent
0.09%.
Silicon: Si is ferrite former, can reduce diffusion velocity of the carbon in ferrite, improves steel belt roof bolt
The inoxidizability and corrosion resistance of steel also can be improved in stability and intensity at high temperature.Si content range is 0.9- in the present invention
1.0%.
Manganese: the harden ability of steel can be improved in Mn, and the strong stable austenite tissue of energy plays solid solution strengthening effect, reduces steel
Hardening heat and hardness reduce quenching distortion.But manganese content excessively can also reduce the toughness plasticity of steel.Mn content range of the present invention exists
1.2-1.3%.
Molybdenum: Mo can enhance the harden ability of steel, while be easy to form alloy carbide with Cr, the carbonization of diffusion-precipitation when tempering
Object precipitated phase increases the post-curing ability and temper resistance of steel.Mo content range of the present invention is in 0.51-0.6%.
Vanadium, titanium: V and Ti can stablize carbon in mould steel, preferentially form MC type carbide in conjunction with carbon, can play more
Invigoration effect is dissipated, elevated temperature strength, high temperature abrasion resistance and temper resistance of mould steel etc. are improved.The content of V and Ti of the present invention
Respectively 0.1-0.15% and 0.04-0.06%.
Nitrogen: N is the element for expanding austenite phase field, can improve the harden ability of steel.Nitrogenous steel is easy to analyse in drawing process
The carbonitride or nitride of even dispersion distribution out, significantly improves the intensity, hardness and wearability of steel.The content of N of the present invention
Range is 0.03-0.05%.
Barium: Ba is alkali earth metal, in addition to it can play deoxidation in steel, moreover it is possible to segregation strengthens crystal boundary in crystal boundary,
Play solution strengthening effect；In addition, while refining the crystal grain of steel, moreover it is possible to which the harden ability for improving steel makes steel part whole cross section
Uniform mechanical property is obtained, deformation and the cracking of steel are reduced；In addition, the addition energy pinning dislocation of appropriate barium, hinders position
Wrong sliding makes the second-phase dispersions such as the vanadium carbide in mould steel distribution in the base, improves the intensity of steel.
Compared with prior art, the present invention has the following advantages:
1. it is characteristic of the invention that being blended into AOD furnace after high chromium hot melt by being smelted in mineral hot furnace and carrying out decarburization, desulfurization, blow
The sequence of operations such as nitrogen alloying finally refine to obtain final Die Steel Products by LF furnace.And general mold steel smelting is electricity
Furnace+electroslag remelting or electric furnace+AOD furnace+external refining, electric furnace smelting needs plus steel scrap, at high cost, and the present invention is directly from containing siderochrome
Mine is started with, and by mine heat furnace smelting sintering chrome ore, greatly reduces production cost.
2. excellent wear-resisting property of the present invention, hardness height and few surface defects
Inventive die Steel Properties are excellent after tested, can structure is complicated, accuracy to size is higher, difficult processing with various extensively
The mould for plastics that degree is big and price is more expensive.
Specific embodiment
Below by embodiment, the technical solutions of the present invention will be further described,
Experimental method in following embodiment is conventional method unless otherwise required, related experiment reagent and material
Material is conventional biochemical reagent and material unless otherwise required.
Embodiment 1-8
The ingredient of mould steel is shown in Table 1 in embodiment 1-8.Specific processing technology is as follows for mould steel:
(1) smelting ingot casting: smelting chromium irons molten iron in mineral hot furnace, and molten iron temperature is maintained at AOD refining furnace and enters furnace
Within the temperature range of required ferrochrome molten iron, it is blended into AOD furnace and carries out decarburization, desulfurization, nitrogen flushing alloying and Si-Ca-Ba conjunction is added
The alloying operation of gold and vanadium titanium etc.；Be transferred to after tapping LF furnace refining, carry out alloying and temperature control operation, temperature 1550~
It comes out of the stove at 1600 DEG C, molten steel is poured into ingot mould, obtain refining mold steel ingot, refining steel ingot is 3t-6t；
(2) ingot casting is hot-forged: refining steel ingot being first heated to 1150-1200 DEG C, keeps the temperature 2-5h, cogging initial forging temperature is
1050-1200 DEG C, final forging temperature is 900-1000 DEG C, slow cooling after forging, and is annealed in time, obtains the round billet of required specification.
(3) heat treatment after forging includes spheroidizing and modifier treatment:
A, spheroidizing: being warming up to 880-900 DEG C of heat preservation 2-3h, is subsequently cooled to 740-760 DEG C of heat preservation 3-4h, then cool down
Room temperature is air-cooled to 550 DEG C hereinafter, coming out of the stove.
B, modifier treatment: 830-850 DEG C of preheating insulation 2-4h, after be warming up to 1060-1080 DEG C, keep the temperature 1-2h, oil quenching；It quenches
It is tempered immediately after fire, tempering temperature is 470-520 DEG C, keeps the temperature 2-4h, comes out of the stove and be air-cooled to room temperature.
The corrosion resisting property and mechanical property sample of alloy of the present invention are directly laterally sampled from the round billet of heat treatment.
Comparative example 1-3
Test is compared with the 4Cr16Mo mould steel of 3 kinds of heterogeneities, is successively labeled as comparative example 1,2,3.To having a competition
It tests and is carried out under the conditions ofs heat treatment identical with embodiment, corrosion resistance test and Mechanics Performance Testing etc..Comparative example 1-3 ingredient
It is shown in Table 1.
The chemical component (wt%) of table 1 embodiment 1-8 and comparative example 1-3
Performance measurement:
The mechanical property and corrosion resistance of the mould steel described in embodiment 1-8 and comparative example 1-3 compare respectively
Test, concrete outcome are shown in Table 2 and table 3.
Room temperature tensile is tested according to GB/T 228.1-2010 " metal material stretching test part 1: room temperature test method "
The room temperature tensile properties of test material.
Brinell hardness test is tested according to GB/T231.1-2002 " metal Brinell hardness test part 1: test method "
The Brinell hardness of material.
Linear expansion coefficient: the sample after surface grinding measures the coefficient of expansion on FB712 type linear expansion coefficient tester.
Surface roughness test: it is successively polished with sand paper sample, and is polished with diamond particles polishing agent, use table
Surface roughness measuring instrument is tested.
Impact test: according to national standard GB T 229-2007 " metal material Charpy pendulum impact test method " test material
Room temperature impact function.
Salt spray corrosion test is according to GB/T 10125-2012 " artificial atmosphere corrosion test salt spray test ", in 25 DEG C, 5%
Spraying 72 hours progress salt spray corrosion tests in NaCl aqueous solution.
The room-temperature mechanical property of mould steel and comparative example 1-3 described in 2 embodiment 1-8 of table
The 72h salt fog of mould steel described in 3 embodiment 1-8 of table and comparative example 1-3 in 25 DEG C of 5% (wt.%) NaCl solution
Test data list
Embodiment does not constitute the limit to the scope of the present invention only to facilitate understand technical solution of the present invention
System, anything that does not depart from the technical scheme of the invention or according to the technical essence of the invention to any letter made by above scheme
Single modification, equivalent variations and modification, still fall within the scope of the present invention.
Claims (5)
1. a kind of high performance plastics mould steel comprising the elemental constituent of following weight percent: C 0.35-0.4%, S≤
0.01%、P≤0.02%、Si 0.9-1.0%、Mn 1.2-1.3%、Cr 14.5-15.0%、Ni 0.05-0.09%、Mo 0.51-
0.6%、V 0.1-0.15%、Ti 0.04-0.06%、N 0.03-0.05%、Ca 0.001-0.03%、Ba 0.001-0.05%、Al
0.001-0.01%, calsibar alloy 1-1.5%, surplus Fe.
2. high performance plastics mould steel according to claim 1, it is characterised in that: the calsibar alloy ingredient is Si
40.0-45.0%、Ca 15.0-20.0%、Al 3.0-5.0%、Ba 25.0-30.0%。
3. preparing the manufacturing method of high performance plastics mould steel as claimed in claim 1 or 2, the manufacturing method includes smelting
Casting ingot, ingot casting hot forging and heat treatment after forging step, it is characterised in that: the smelting step is using mineral hot furnace+AOD+LF
Furnace is smelted, specifically: the smelting chromium irons molten iron in mineral hot furnace, and molten iron temperature is maintained at AOD refining furnace and is entered needed for furnace
Within the temperature range of ferrochrome molten iron, be blended into AOD furnace carry out decarburization, desulfurization, nitrogen flushing alloying and be added calsibar alloy and
The alloying of vanadium titanium etc. operates；It is transferred to the refining of LF furnace after tapping, alloying and temperature control operation are carried out, at 1550~1600 DEG C of temperature
Under come out of the stove, molten steel is poured into ingot mould, obtain refining mold steel ingot, refining steel ingot be 3t-6t.
4. the manufacturing method of high performance plastics mould steel according to claim 3, it is characterised in that: the ingot casting hot forging step
Suddenly are as follows: refining mold steel ingot made from smelting step is first heated to 1150-1200 DEG C, keeps the temperature 2-5h, cogging initial forging temperature
It is 1050-1200 DEG C, final forging temperature is 900-1000 DEG C, slow cooling after forging, and is annealed in time, and the circle of required specification is obtained
Base.
5. the manufacturing method of high performance plastics mould steel according to claim 4, it is characterised in that: after the forging at heat
Reason includes spheroidizing and modifier treatment, specifically:
A, spheroidizing: being warming up to 880-900 DEG C of heat preservation 2-3h, is subsequently cooled to 740-760 DEG C of heat preservation 3-4h, is cooled to
550 DEG C are air-cooled to room temperature hereinafter, coming out of the stove;
B, modifier treatment: 830-850 DEG C of preheating insulation 2-4h, after be warming up to 1060-1080 DEG C, keep the temperature 1-2h, oil quenching；Quenching
It is tempered immediately afterwards, tempering temperature is 470-520 DEG C, keeps the temperature 2-4h, comes out of the stove and be air-cooled to room temperature.
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| CN201910804468.9A CN110408855A (en) | 2019-08-28 | 2019-08-28 | A kind of high performance plastics mould steel and its manufacturing method |
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| CN201910804468.9A CN110408855A (en) | 2019-08-28 | 2019-08-28 | A kind of high performance plastics mould steel and its manufacturing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080693A (en) * | 2020-08-26 | 2020-12-15 | 盐城市联鑫钢铁有限公司 | Titanium micro-alloyed anti-seismic steel bar and preparation method thereof |
| CN112853201A (en) * | 2019-11-28 | 2021-05-28 | 武汉昆伦特钢装备科技开发有限公司 | Ultrahigh-strength high-hardness wear-resistant impact-resistant corrosion-resistant alloy steel and manufacturing process thereof |
| CN113802069A (en) * | 2021-09-18 | 2021-12-17 | 恒碧沃金属材料(上海)有限公司 | Novel die steel material and preparation method thereof |
| CN114351042A (en) * | 2021-11-26 | 2022-04-15 | 河北工程大学 | Die steel and preheating treatment method for carbide dispersion in die steel |
-
2019
- 2019-08-28 CN CN201910804468.9A patent/CN110408855A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853201A (en) * | 2019-11-28 | 2021-05-28 | 武汉昆伦特钢装备科技开发有限公司 | Ultrahigh-strength high-hardness wear-resistant impact-resistant corrosion-resistant alloy steel and manufacturing process thereof |
| CN112080693A (en) * | 2020-08-26 | 2020-12-15 | 盐城市联鑫钢铁有限公司 | Titanium micro-alloyed anti-seismic steel bar and preparation method thereof |
| CN112080693B (en) * | 2020-08-26 | 2021-04-13 | 盐城市联鑫钢铁有限公司 | Titanium micro-alloyed anti-seismic steel bar and preparation method thereof |
| CN113802069A (en) * | 2021-09-18 | 2021-12-17 | 恒碧沃金属材料(上海)有限公司 | Novel die steel material and preparation method thereof |
| CN114351042A (en) * | 2021-11-26 | 2022-04-15 | 河北工程大学 | Die steel and preheating treatment method for carbide dispersion in die steel |
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Application publication date: 20191105 |