CN100402690C - Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method - Google Patents
Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method Download PDFInfo
- Publication number
- CN100402690C CN100402690C CNB2005100251424A CN200510025142A CN100402690C CN 100402690 C CN100402690 C CN 100402690C CN B2005100251424 A CNB2005100251424 A CN B2005100251424A CN 200510025142 A CN200510025142 A CN 200510025142A CN 100402690 C CN100402690 C CN 100402690C
- Authority
- CN
- China
- Prior art keywords
- module
- steel
- stove
- ingot
- hours
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 114
- 239000010959 steel Substances 0.000 title claims abstract description 114
- 239000004033 plastic Substances 0.000 title claims abstract description 35
- 229920003023 plastic Polymers 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000000137 annealing Methods 0.000 claims abstract description 41
- 238000005260 corrosion Methods 0.000 claims abstract description 36
- 230000007797 corrosion Effects 0.000 claims abstract description 35
- 238000005242 forging Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000010791 quenching Methods 0.000 claims abstract description 23
- 230000000171 quenching effect Effects 0.000 claims abstract description 23
- 238000005496 tempering Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 22
- 239000003607 modifier Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 13
- 238000007670 refining Methods 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 12
- 229910000734 martensite Inorganic materials 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000004512 die casting Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 241001062472 Stokellia anisodon Species 0.000 claims description 4
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 3
- 229930194542 Keto Natural products 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 229910052729 chemical element Inorganic materials 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 125000000468 ketone group Chemical group 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims 1
- 229910001634 calcium fluoride Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 4
- 238000009489 vacuum treatment Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 17
- 230000035882 stress Effects 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- 230000009466 transformation Effects 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910001566 austenite Inorganic materials 0.000 description 8
- 230000008646 thermal stress Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001349 ledeburite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to novel plastic die steel 4Cr16Mo with corrosion resistance and wear resistance and a method for manufacturing mirror surface big modules of the plastic die steel 4Cr16Mo which is characterized in that the plastic die steel 4Cr16Mo has the chemical compositions (weight percentage): 0.33 to 0.43% of C, 0.30 to 1.00% of Mn, 0.30 to 1.00% of Si, at most 0.045 % of S, at most 0.045 % of P, 14 to 18% of Cr, 0.10 to 1.00% of Ni, 0.80 to 1.50% of Mo and Fe as the rest. Electroslag ingots with uniform ingredients are formed by being processed with primary melting by an electric furnace, double fine smelting of vacuum treatment outside the furnace and electroslag remelting, necessary steel ingots cast by moulds, stress-relief annealing for the electroslag ingots and smelting; after that heat processing forging technologies are adopted, and necessary module stress-relief annealing are adopted for producing the electroslag ingots into the big modules (thickness is 500mm; width is 1200mm; length is 2500mm); finally a special heat treatment module is adopted for a quenching and tempering treatment technology, so that the big modules of the plastic die steel with high corrosion resistance and high wear resistance are produced (a hardness range is from 30 to 40HR; C fluctuation is less than 4 HRC). The mirror surface big modules of the 4Cr16Mo of the present invention have the advantages of stable quality, satisfaction of performance standards (inclusions A are at most 2.0, B is at most 2.0, C thinness is at most 2.0, C coarseness is at most 1.5 and D is at most 2.0), and obvious economic and social benefit.
Description
Technical field
The present invention relates to the composition Alloying Design of metallurgy industry die steel, in particular for the production method of corrosion-resistant, anti abrasive plastic die steel and module thereof.
Background technology
Die steel is special steel alloy, generally can be divided into cold-work die steel, hot-work die steel and mould of plastics steel three major types.Mould of plastics is with steel is mainly used in that production lot is big, die size is bigger, complex-shaped, dimensional precision and surfaceness are had relatively high expectations mould for plastics or mould bases; Hot-work die steel is mainly used in to be manufactured under the condition of high temperature metal is carried out the mould that hot-work is used, and comprises hot forged mould (as 5CrNiMo module steel) etc.Therefore, make the die steel of module forging, generally include mould of plastics with steel and part hot-work die steel (as 5CrNiMo die steel).Module is the conventional products of plastic die steel, is mainly used in the mould manufacturing of plastics.With polyvinyl chloride (PVC) or polystyrene (ABS)+anti-flame agent is the plastics of raw material, in the thermoforming process, can decomposite gases such as having corrosive chlorine and sulfurous gas, therefore, the mould of production the type plastics, its moulding stock (steel) must have stronger corrosion resisting property.
China's plastic die steel research is started late, the research of corrosion-resistant moulding stock is poor especially, the basic grade of steel of present domestic corrosion-resistant plastic die steel mainly is 9Cr18, Cr18MoV, 4Cr13, iron and steel kinds such as 1Cr17Ni2, in the production practice, there is following defective in above-mentioned grade of steel: (1) belongs to the 9Cr18 of Ledeburitic steel, Cr18MoV, because carbon content is higher, in the as-cast structure once with the secondary double carbide, as (Fe, Cr) 7C3 is so module must just can make thick carbide uniform distribution (distributing otherwise will occur the carbide chain in the tissue) by big draught forging in producing; And the specification of heavy die block is bigger, and pier is thick, the forging process of pulling even adopt repeatedly, also is difficult to guarantee the complete fragmentation and the carbide uniform distribution (influencing corrosion-resistant, the abrasion resistance properties of module) of material heart portion carbide.(2) belong to hypereutectoid steel 4Cr13 (when Cr content 12% the time, the S point moves to left, just eutectoid point moves to left, the eutectoid carbon content moves to 0.4%), the Heat Treatment Of Steel quenching temperature is more than 1060-1100 ℃ the time, carbide solid solution fully is difficult to reach 11%-12% left and right sides chromium content in the back martensite that quenches; Because it is not high to contain the Cr amount, do not satisfy the required composition quality mark of corrosion resisting property, cause the poor corrosion resistance of steel, can only resist general atmosphere and water vapor corrosion (, can only be used for the general mould of plastics manufacturing of corrosion resisting property) though after heat treatment obtain higher hardness and wear resistance.(3) belong to the 1Cr17Ni2 steel of martensite type Stainless Acid Resistant Steel, be used for the oxidation acids and the nitric acid of certain temperature, concentration is arranged, during working conditions such as most of organic acid and salts solution, good solidity to corrosion is arranged; But there is the fragility tendency, the heat processing technique complexity, chemical ingredients segregation and microoscillations have considerable influence to the structure of steel performance, shortcomings such as welding property difference.
In sum, be used to make have high anti-corrosion, plastic die steel such as punching die of the big module of high-wearing feature, transfer mold, in the basic grade of steel of domestic corrosion-resistant plastic die steel that is suitable for, the defective that ubiquity processing difficulties, quality stability difference or solidity to corrosion and wear resistance can not have both; In addition, retrieved domestic and international related data, for the module of corrosion-resistant, wear-resistant plastic die steel (durometer level: HRC30-40, hardness fluctuations 4HRC), big module (thickness: 200-500mm; Width: 800-1200mm; The thermal treatment process of length＞2500mm) is not appeared in the newspapers.Therefore, for corrosion resistant plastic die steel, die industry uses the expensive imported materials and items domestic material of similar external grade of steel chemical ingredients (or select) mostly, comes mfg. moulding die, to satisfy the high performance requirements of solidity to corrosion, wear-resistant mould of plastics.
Summary of the invention
The object of the invention is to provide a kind of big module of minute surface of 4Cr16Mo die steel to prepare production method, alloying composition design (having taken into account solidity to corrosion and wear resistance simultaneously) by steel, the outer vacuum-treat of stove adds two refining smelting technologyes of electroslag remelting, special heat treatment module finished product modifier treatment technology, and necessary static ingot, ESR ingot, module stress relief annealing processing method, produce the big module of plastic die steel of highly corrosion resistant, high abrasion resistance energy, satisfy the big module production domesticization demand of die industry corrosion-resistant plastic die steel.
Corrosion-resistant, the wear-resistant plastic die steel 4Cr16Mo that is used for big module of the present invention's exploitation, the chemical element composition (weight %) that it is characterized in that steel is: 0.33～0.43%C, 0.30～1.00%Mn, 0.30～1.00%Si, S≤0.045%, P≤0.045%, 14～18%Cr, 0.10～1.00%Ni, 0.80～1.50%Mo; All the other are Fe.
The 4Cr16Mo continuous cooling transformation curve of measuring is: Ac3=960 ℃, and Ac1=800 ℃, Ms=190 ℃.
The optimum chemical elemental composition (weight %) of steel is: 0.35～0.41%C, 0.50～0.80%Mn, 0.50～0.80%Si, S≤0.015%, P≤0.025%, 15～16%Cr, 0.10～0.60%Ni, 1.00～1.30%Mo; All the other are Fe.
The composition range mentality of designing is:
Improve in the corrosion proof steel Cr content necessary＞12%.Even the module quenching temperature improves anti abrasive Cr more than 1060～1100 ℃
23C
6Carbide particle also is difficult to complete solid solution, and therefore, for guaranteeing chromium content＞12% in the quenched martensite, Cr content must be greater than Cr content (12～14%) the standard code requirement of 4Cr13 steel.
Have a certain amount of Mo content in the steel, make and contain suitable carbide in the steel, improve wear resistance.On the one hand, add Mo, be based on and form M6C type carbide in the steel, separate out, increase the solid solubility of Cr, improve material wear ability by M6C; On the other hand, add Mo, can cause dispersion hardening after tempering, favourable raising product secondary hardness and thermostability, and the temper brittleness temperature of raising steel avoid temper brittleness to take place.
Consider Cr, Mo comprehensive action, determine Cr:14-18%, Mo:0.80～1.50%.
C content: 0.33-0.43%.Because the effect of alloying element, the S point moves to left, and just eutectoid point moves to left, and the eutectoid carbon content moves to below 0.4%, and too high C content will form ledeburite, and thick distribution of carbides inequality is unfavorable to performance; In addition,, satisfied service requirements more than the hardness 30HRC, and the hardness fluctuations scope is to pay attention to the big module of plastic die steel.
S reduces the horizontal plastic property of steel, determines S: less than 0.045%.
P reduces the plasticity of steel, determines P: less than 0.045%.
Ni content: 0.10～1.00%.A small amount of adding of Ni can improve the toughness of steel, improves the module thermal fatigue property, and improves hardening capacity.
Corrosion-resistant, the wear-resistant 4Cr16Mo plastic die steel of the present invention design belongs to Martensite Stainless Steel, can be used for making the big module of mould of plastics of punching die with outstanding corrosion resisting property, high-wearing feature, transfer mold etc.Because transformation stress is big, in the big module manufacturing of the 4Cr16Mo Martensite Stainless Steel process, before module was forged, prevention steel ingot transformation stress was induced and is cracked, and becomes steel ingot, the heat treated vital task of ESR ingot; Be the elimination white point, improve the module lateral performance and forge the postheat treatment purpose, crystal grain thinning, realization homogeneous microstructureization satisfy the requirement of mould mirror polish; Finally reach desired performance, big module is cut and hardness fluctuations is little by modifier treatment.Therefore, thermal treatment is the key point of guaranteeing the big module use properties of stainless steel.
The preparation production method of the big module of 4Cr16Mo minute surface of the present invention's exploitation, it is characterized in that adopting the three phases of smelting, forging and module modifier treatment, manufacture out corrosion-resistant, wear-resistant 4Cr16Mo plastic die steel (after the modifier treatment hardness fluctuations less than 4HRC, the big module of the minute surface of durometer level 30～40HRC) (thickness 200～500mm; Width 800～1200mm; The finished product of length＞2500mm);
The first, the smelting stage, adopt the outer vacuum-treat of stove to add two refinery practices of electroslag remelting, reach necessary static ingot, ESR ingot stress relief annealing, smelt even, the stable 4Cr16Mo ESR ingot of composition; Concrete production method be electric furnace (EF) refining just-→ the outer vacuum-treat (LFV stove or the refining of LF+VD stove) of stove, the molten steel die casting-→ the static ingot stress relief annealing-→ esr-→ the ESR ingot stress relief annealing;
(1) electric furnace (EF) refining just, the 4Cr16Mo steel that smelting component puts in place substantially, key points for operation:
Stainless Returning blowing keto technique melting molten steel routinely;
Containing the Cr alloy is the Cr stainless steel returns (reducing production costs) of low P;
Composition puts in place during the tapping of FF stove;
(2) LFV stove or the refining of LF+VD stove are adopted in the outer vacuum-treat of stove, and high-temperature molten steel is carried out trimming and degassing processing; The molten steel die casting, key points for operation:
Suitably insert Al before the vacuum;
Omnidistance BOTTOM ARGON BLOWING stirs, remove in the molten steel harmful inclusion;
Vacuum tightness≤140Pa (66.7Pa) processing that outgases, 15～20 minutes vacuum outgas time, (O, H are the obnoxious flavoures in the molten steel to make O content≤25ppm, H content≤2ppm in the molten steel, and the follow-up esr function that do not outgas, the O too high levels, can cause the increase of steel inclusion total amount, reduce the fatigue lifetime of mould; The H too high levels can cause hydrogen induced cracking, causes scrapping.In addition, during H content 4ppm, the expansion H annealed time is long, and production efficiency is low);
The molten steel die casting: 40～70 ℃ of casting superheating temperature that is to say that tapping temperature is controlled at 1530～1540 ℃ (minimizing ingotisms); The steel ingot calcining temperature is controlled at 600～700 ℃ (about 650 ℃); The annealing of steel ingot hot charging;
(3) static ingot annealing
After the steel ingot demoulding, according to continuous cooling transformation curve (Fig. 3; Ac3=960 ℃, Ac1=800 ℃, Ms=190 ℃; According to continuous cooling transformation curve, 650～790 ℃ of temperature ranges are mixed tissues of ferrite+carbide.) steel ingot hot charging annealing (eliminate structural stress, avoid crackle to be produced as purpose) technology be: 600～700 ℃ of annealing furnace starting temperatures; 550～700 ℃ (this moment, heart portion temperature was between 800～900 ℃ for surface temperature, have thermal stresses) steel ingot, slowly be warming up to 700～790 ℃ of (Ar1 ≈ Ac1+30～35 ℃=830～835 ℃ with 30～80 ℃/hour rate of heating, under the hot charging annealing conditions, in 670～800 ℃ of temperature ranges, the structural transformation of supercooled austenite generation steel, the mixed tissue of formation ferrite+carbide.), 3.5～4.5 hours heat tracing time (eliminating surface of steel ingot and heart portion inside and outside temperature difference); Again 700～790 ℃ of insulations 18～22 hours (eliminating the martensitic transformation structural stress of steel); Be chilled to 400 ℃ and come out of the stove (minimizing thermal stresses) with 10～50 ℃/hour cooling rate stove subsequently;
(4) electroslag remelting furnace refining is the uniform ESR ingot of composition (slowing down more serious static ingot component segregation phenomenon) with the static ingot melting, improves corrosion-resistant, the abrasion resistance properties of product, key points for operation:
Crystallizer: Φ 900/980mm;
Slag system: CaF
2: Al
2O
3=(65～75): (25～35), the quantity of slag 350～450kg/ ingot, the melt cinder starting the arc;
12.0～12.5 tons of (9,00/,980 2 of balanced electroslag Φ of supplied materials of ESR ingot weight; The iron and steel stock that satisfies the big module of 4Cr16Mo steel requires);
During esr to 0.45～0.55, close handle water tank water coolant, it is steady relatively that bath keeps;
650～750 ℃ of calcining temperatures;
Annealing is sent in demoulding after heat;
(5) ESR ingot annealing
ESR ingot (through the ESR ingot behind vacuum refinement, the esr, foreign matter content is low, distributed components) employing hot charging underannealing technology (purpose has two: A, elimination structural stress, and avoid crackle to produce; The thick carbide that B, dissolving are separated out when solidifying, thinning microstructure.): annealing is sent in ESR ingot demoulding after heat, 650～750 ℃ of (about 800 ℃ of heart portion temperature of calcining temperature, this moment, ingot structure was that supercooled austenite adds primary carbide), 550～650 ℃ of annealing furnace temperature controls, soaking time 4.5～5.5 hours (elimination internal-external temperature difference); Heat up with 40～60 ℃/hour speed again and be heated to 840～900 ℃ and (a little more than Ac1, Ar1 temperature, be lower than Ac3, Ar3 temperature, to obtain the equilibrium tissue that austenite adds carbide; In general, a little more than 10～20 ℃ of Ar1 temperature, temperature is too high, steel organize the crystal grain thick) underannealing, be incubated 12～16 hours (long-time insulation, melt or reduce the primary carbide size); Be cooled to 23～28 hours (impelling austenitic transformation is ferrite+proeutectoid carbide, thinning microstructure) of 700～790 ℃ of insulations with 30～60 ℃/hour speed of cooling again; Be cooled to 350 ℃ and come out of the stove (elimination thermal stresses) with 30～60 ℃/hour speed of cooling subsequently;
The second, the forging stage, adopt hot-work forging process and necessary module stress relief annealing, ESR ingot is forged into the big module (thickness 200～500mm of final dimension; Width 800～1200mm; Length＞2500mm); Concrete production method be module hot-work forge-→ the module finished products;
(1) heating before ESR ingot is forged;
Heating process before forging (directly the distribution of carbides and the size of back material forged in influence) is: ESR ingot is advanced behind the stove 4.5～5.5 hours (the guaranteeing the homogenizing of internal and external temperature) of temperature insulation with 350～400 ℃; After slowly being heated to 830～880 ℃ with 40～60 ℃/hour speed again, (evenly the ESR ingot internal-external temperature difference reduces thermal stresses to be incubated 4.5～5.5 hours, form austenite+carbide tissue, and create conditions) for high temperature section shortens the surface decarburization of soaking time minimizing ESR ingot; With 100～120 ℃/hour rate of heating, be rapidly heated to 2.5～3.5 hours (finishing the dissolving fully of equal gentle carbide) of 1150～1200 ℃ of insulations then, the hot-work of coming out of the stove is forged;
(2) hot-work is forged: hot-work forging method routinely, the big module of ESR ingot being forged into final dimension; In the forging process, forging be if need melt down heating, melts down to be controlled at 2～3 hours heat-up time;
(3) module finished products, adopt and forge back direct hot charging annealing process: annealing furnace is incubated in 550-650 ℃ temperature range and waits to expect; Wait to forge after the back module advances stove and finish, be warming up to 850～890 ℃ of insulations 9～12 hours (long-time insulation, the homogenizing that realizes forging the back tissue) with 50～80 ℃/hour speed; Subsequently, stove cold (40～60 ℃/hour of speed of cooling) is to 700～790 ℃ of insulations 20～30 hours (long-time insulation, impelling austenitic transformation is ferrite+proeutectoid carbide, thinning microstructure); At last be cooled to 350 ℃ and come out of the stove (elimination thermal stresses) with 20～40 ℃/hour speed of cooling;
The 3rd, the module modifier treatment stage, adopt special thermal treatment process, module is carried out modifier treatment (quenching+tempering) technology, produce Functionality, quality and appealing design big module finished product (after the modifier treatment hardness fluctuations less than 4HRC, durometer level 30～40HRC):
(1) module quenching technology (Fig. 1): 630～700 ℃, 850～900 ℃ twice insulations (be for samming inside and outside the module, reduce thermal stresses, and soaking, the soaking time of minimizing high temperature section provide prerequisite); (module is finished austenitizing at 880 ℃, and therefore follow-up rate of heating can suitably improve to be warming up to 1010～1050 ℃ with 70～100 ℃/speed at one hour rating subsequently; Select 1010～1050 ℃ as quenching temperature, be for the dissolving carbide as much as possible and too much the taking all factors into consideration of back residual austenite of avoiding quenching), 1010～1050 ℃ of soaking time experimental formula t (h)=0.015h/mm* module thickness (mm)+6.5h routinely calculate;
Quenching medium is that (selection of quenching medium directly influences the final product quality of module to F-2000, continuous cooling transformation curve according to 4Cr16Mo, relatively stable at supercooled austenite more than 650 ℃, answer slow cooling to reduce thermal stresses, should be cold soon at 400-650 ℃ middle warm area to guarantee that austenite does not decompose, in view of above-mentioned reason, select the F-2000 quenching medium); Cool time (by the oil outlet temperature of cool time control module) with experimental formula t (minute)=0.5* module thickness (mm)-24 calculates; Module oil outlet temperature (the determining to be based on of oil outlet temperature guaranteed through hardening and keep suitable residual austenite to avoid structural stress to form the dual consideration of crackle) is controlled at 160～200 ℃ of fuel-displaced 4.5～5.5 minutes module table surface temperatures;
(2) the module tempering process of working out with reference to tempering temperature-hardness curve (Fig. 4) of 4Cr16Mo (Fig. 2) is: module is advanced the stove tempering after quenching immediately; During the tempering heating, (purpose was: 1, have only a spot of carbide to separate out in the martensite this moment, because the square degree of dot matrix reduces because of separating out of carbide, eliminated the internal stress of part 140～160 ℃ of insulations 3～6 hours; 2, wait to expect, be convenient to follow-up quenching module and advance stove, help serialization production); Subsequently, be warming up in 550～600 ℃ of definite temperature ranges (according to the requirement of user's hardness, tempering temperature is determined suitable temperature in 550-600 ℃ of scope, fluctuation must not greater than ± 10 ℃) insulation back air cooling; Tempered structure is cryptocrystalline martensite+granular carbide.
Compare with prior art, the present invention has following advantage:
1, composition is reasonable in design, can satisfy the high request that mould of plastics is corrosion-resistant, wear resistance has both;
2, production technique is reasonable, and is workable;
3, corrosion-resistant, abrasion resistance properties good;
4, module product steady quality, the qualification rate height, the big module of corrosion-resistant, anti abrasive minute surface meets the demands
The high standard service requirements;
5, the reasonable heat treatment process of the corrosion-resistant big module 4Cr16Mo of Martensite Stainless Steel.
Description of drawings
Fig. 1 is the quenching technology figure that 4Cr16Mo module heat treatment quenching and tempering is handled
Fig. 2 is the tempering process figure that 4Cr16Mo module heat treatment quenching and tempering is handled
Fig. 3 is 4Cr16Mo continuous cooling transformation curve figure
Fig. 4 is 4Cr16Mo tempering temperature-hardness profile
Specific embodiments
Certain Iron And Steel Company implements patent of the present invention, smelt corrosion-resistant, the wear-resistant plastic die steel 4Cr16Mo of 4 heats steel (chemical ingredients: 0.35～0.41%C, 0.50～0.80%Mn, 0.50～0.80%Si, S≤0.015%, P≤0.025%, 15～16%Cr, 0.10～0.60%Ni, 1.00～1.30%Mo; All the other are Fe.The 4Cr16Mo continuous cooling transformation curve of measuring is: Ac3=960 ℃, and Ac1=800 ℃, Ms=190 ℃.); The preparation method of its big module, be to adopt the three phases of smelting, forging and finished product modifier treatment, manufacture out corrosion-resistant, wear-resistant 4Cr16Mo plastic die steel (after the modifier treatment hardness fluctuations less than 4HRC, the big module of the minute surface of durometer level 30～40HRC) (thickness: 200～500mm; Width: 800～1200mm; The finished product of length＞2500mm):
First, the smelting stage, adopt the outer vacuum-treat of stove to add two refinery practices of electroslag remelting, and necessary static ingot, ESR ingot stress relief annealing, smelt even, the stable 4Cr16Mo ESR ingot of composition: (1) electric furnace (EF) is refining just, the 4Cr16Mo steel that smelting component puts in place substantially, key points for operation: stainless Returning blowing keto technique melting molten steel routinely; Containing the Cr alloy is the Cr stainless steel returns of low P; Composition puts in place during the tapping of EF stove; (2) the outer vacuum-treat (refining of LFV stove) of stove is carried out trimming and degassing processing to high-temperature molten steel; The molten steel die casting, key points for operation: suitably insert Al before the vacuum; Omnidistance BOTTOM ARGON BLOWING stirs, remove in the molten steel harmful inclusion; The vacuum tightness 66.7Pa processing that outgases, 15～20 minutes vacuum outgas time; 40～70 ℃ of the casting superheating temperature of molten steel die casting; The steel ingot calcining temperature is controlled at 600～700 ℃; The annealing of steel ingot hot charging; (3) static ingot stress relief annealing: 600～700 ℃ of annealing furnace starting temperatures; The steel ingot that surface temperature is 550～700 ℃ slowly is warming up to 720～750 ℃ with 30～80 ℃/hour rate of heating, 4 hours heat tracing time; Again 720～750 ℃ of insulations 20 hours; Being chilled to 400 ℃ with 30～50 ℃/hour cooling rate stove subsequently comes out of the stove; (4) electroslag remelting furnace refining is the uniform ESR ingot of composition with the static ingot melting, improves corrosion-resistant, the abrasion resistance properties of product, key points for operation: crystallizer: Φ 900/980mm; Slag system: CaF
2: Al
2O
3=70: 30, the quantity of slag 350～450kg/ ingot, the melt cinder starting the arc; ESR ingot weight is 12.0～12.5 tons; During esr to 1/2, close handle water tank water coolant, it is steady relatively that bath keeps; 650～750 ℃ of calcining temperatures; Annealing is sent in demoulding after heat; (5) ESR ingot hot charging underannealing technology: annealing is sent in ESR ingot demoulding after heat, 600 ℃ of annealing furnace temperature controls, soaking time 5 hours; Heat up with 50 ℃/hour speed again and be heated to 850～870 ℃ of underannealings insulations 14 hours; Be cooled to 720～750 ℃ of insulations 25 hours with 50 ℃/hour speed of cooling again; Being cooled to 350 ℃ with 50 ℃/hour speed of cooling subsequently comes out of the stove.
The second, the forging stage, adopt hot-work forging process and necessary module stress relief annealing, ESR ingot is forged into final dimension (thickness: 200～500mm; Width: 800～1200mm; The big module of length＞2500mm): heating process was before (1) ESR ingot was forged: ESR ingot is advanced behind the stove with 350～400 ℃ temperature insulation 5 hours; Slowly be heated to 840～870 ℃ with 30～60 ℃/hour speed), be incubated 5 hours; Be rapidly heated to 1170～1190 ℃ with 100～120 ℃/hour speed again, be incubated 3 hours; The forging of coming out of the stove; (2) hot-work is forged: hot-work forging method routinely, the big module of ESR ingot being forged into final dimension; In the hot-work forging process, forging be if need melt down heating, melts down to be controlled at 2～3 hours heat-up time; (3) module finished products, adopt and forge back direct hot charging annealing process: annealing furnace is incubated in 550～650 ℃ temperature range and waits to expect; Wait to forge after the back module advances stove and finish, be warming up to 850～890 ℃, be incubated 10 hours with 50～80 ℃/hour speed; Stove is chilled to 720～750 ℃, is incubated 25 hours; Being cooled to 350 ℃ with 20～40 ℃/hour speed of cooling subsequently comes out of the stove.
The 3rd, the module modifier treatment stage, adopt special thermal treatment process, module is carried out modifier treatment (quenching+tempering) technology, produce Functionality, quality and appealing design big module finished product (after the modifier treatment hardness fluctuations less than 4HRC, durometer level 30～40HRC): (1) Fig. 1 module quenching technology: (630～670 ℃), (860～880 ℃) twice insulation; Be warming up to 1020～1040 ℃ with 70～100 ℃/speed at one hour rating at last, soaking time is calculated by experimental formula t (h)=0.015h/mm* module thickness (mm)+6.5h; Select F-2000 as quenching medium; Cool time with experimental formula t (minute)=0.5* module thickness (mm)-24 calculates; The module oil outlet temperature was controlled at fuel-displaced 5 minutes, 180 ℃ of module table surface temperatures; (2) module tempering process Fig. 2 that works out with reference to tempering temperature-hardness curve of the 4Cr16Mo of Fig. 4: module is advanced the stove tempering after quenching immediately; During the tempering heating, 150 ℃ of insulations 3～6 hours; Subsequently, be warming up to 580～590 ℃ of temperature insulation back air coolings, 590 ℃ of temperature require to determine according to user's hardness; Tempered structure is cryptocrystalline martensite+granular carbide.
(hardness fluctuations is less than 4HRC after the modifier treatment for corrosion-resistant, the wear-resistant 4Cr16Mo plastic die steel that method for preparing is produced, the big module of the minute surface of durometer level 30～40HRC), big module trimmed size 200～500mm is thick, 800～1200mm is wide, 2500～3000mm long, module quality stable (see Table 1, table 2), reach the user and use standard (UT (Ultrasonic Testing), minimumly satisfy ∮ 4.0 flat-bottom holes, inclusion A≤2.0, B≤2.0, C carefully≤2.0, C slightly≤1.5, D≤2.0), satisfy the requirement of mould mirror polish.
Scale of hardness 1 in kind
Inclusion grading table 2 in kind
Claims (2)
1.4Cr16Mo the preparation production method of the big module of die steel minute surface is characterized in that adopting the three phases of smelting, forging and module modifier treatment, manufactures out the big module finished product of minute surface of corrosion-resistant, wear-resistant 4Cr16Mo plastic die steel; Hardness fluctuations is less than 4HRC after the big module finished product modifier treatment, durometer level 30～40HRC; Big module trimmed size is thickness 200～500mm, width 800～1200mm, length＞2500mm;
The first, the chemical element composition of the big module of 4Cr16Mo die steel minute surface is: 0.33～0.43%C, 0.30～1.00%Mn, 0.30～1.00%Si, S≤0.045%, P≤0.045%, 14～18%Cr, 0.10～1.00%Ni, 0.80～1.50%Mo; All the other are Fe; Unit is weight %;
The second, the smelting stage, adopt the outer vacuum-treat of stove to add two refinery practices of electroslag remelting, reach necessary static ingot stress relief annealing and ESR ingot stress relief annealing, smelt even, the stable 4Cr16Mo ESR ingot of composition; Concrete production method be electric furnace just refine-→ the outer vacuum-treat refining liquid steel of stove, the molten steel die casting-→ the static ingot stress relief annealing-→ esr-→ the ESR ingot stress relief annealing: (1) EF electric furnace just refines, the 4Cr16Mo steel that smelting component puts in place substantially, key points for operation: stainless Returning blowing keto technique melting molten steel routinely;
Containing the Cr alloy is the Cr stainless steel returns of low P;
Composition puts in place during the tapping of EF stove;
(2) LFV stove or the refining of LF+VD stove are adopted in the outer vacuum-treat of stove, and high-temperature molten steel is carried out trimming and degassing processing; The molten steel die casting, key points for operation:
Suitably insert Al before the vacuum;
Omnidistance BOTTOM ARGON BLOWING stirs, remove in the molten steel harmful inclusion;
Vacuum tightness≤140Pa processing that outgases, 15～20 minutes vacuum outgas time, make the 0 content≤25ppm in the molten steel, make the H content≤2ppm in the molten steel simultaneously;
The molten steel die casting: 40～70 ℃ of casting superheating temperature that is to say that tapping temperature is controlled at 1530～1540 ℃;
The steel ingot calcining temperature is controlled at 600～700 ℃; The annealing of steel ingot hot charging;
(3) static ingot annealing: adopt hot charging annealing, 600～700 ℃ of annealing furnace starting temperatures; The steel ingot that surface temperature is 550～700 ℃ slowly is warming up to 700～790 ℃ with 30～80 ℃/hour rate of heating, 3.5～4.5 hours heat tracing time; Again 700～790 ℃ of insulations 18～22 hours; Being chilled to 400 ℃ with 10～50 ℃/hour cooling rate stove subsequently comes out of the stove;
(4) electroslag remelting furnace refining is the uniform ESR ingot of composition with the static ingot melting, key points for operation:
Crystallizer: Φ 900/980mm;
Slag system: CaF2: Al
2O
3=(65～75): (25～35), the quantity of slag 350～450kg/ ingot, the melt cinder starting the arc;
12.0～12.5 tons of ESR ingot weight;
During esr to 0.45～0.55, close handle water tank water coolant, it is steady relatively that bath keeps;
650～750 ℃ of calcining temperatures;
Annealing is sent in demoulding after heat;
(5) ESR ingot annealing: adopt hot charging underannealing technology, annealing is sent in ESR ingot demoulding after heat, 650～750 ℃ of calcining temperatures, 550～650 ℃ of annealing furnace temperature, soaking time 4.5～5.5 hours; Heat up with 40～60 ℃/hour speed again and be heated to 840～900 ℃ of underannealings, be incubated 12～16 hours; Be cooled to 700～790 ℃ of insulations 23～28 hours with 30～60 ℃/hour speed of cooling again; Being cooled to 350 ℃ with 30～60 ℃/hour speed of cooling subsequently comes out of the stove;
The 3rd, the forging stage, adopt hot-work forging process and necessary module stress relief annealing, with the big module that ESR ingot is forged into final dimension, big module specification is thickness 200～500mm, width 800～1200mm, length＞2500mm; Concrete production method be module hot-work forge-→ the module finished products:
(1) heating process was before ESR ingot was forged: ESR ingot is advanced behind the stove with 350～400 ℃ temperature insulation 4.5～5.5 hours; After slowly being heated to 830～880 ℃ with 40～60/ hours speed again, be incubated 4.5～5.5 hours; With 100～120 ℃/hour rate of heating, be rapidly heated to 1150～1200 ℃ of insulations 2.5～3.5 hours then, the hot-work of coming out of the stove is forged;
(2) hot-work is forged: hot-work forging method routinely, the big module of ESR ingot being forged into final dimension; In the forging process, forging be if need melt down heating, melts down to be controlled at 2～3 hours heat-up time;
(3) module finished products, adopt and forge back direct hot charging annealing process: annealing furnace is incubated in 550～650 ℃ temperature range and waits to expect; Wait to forge after the back module advances stove and finish, be warming up to 850～890 ℃ of insulations 9～12 hours with 50～80 ℃/hour speed; Subsequently, stove is chilled to 700～790 ℃ of insulations 20～30 hours; Last speed of cooling with 20～40 ℃/hour is cooled to 350 ℃ and comes out of the stove;
The 4th, the module modifier treatment stage, adopt special thermal treatment process, module is quenched+tempered modifier treatment technology, produce the big module finished product of Functionality, quality and appealing design; Big module finished product hardness fluctuations after the modifier treatment is less than 4HRC, durometer level 30～40HRC:
(1) module quenching technology: 630～700 ℃, 850～900 ℃ twice insulations; Be warming up to 1010～1050 ℃ quenching temperature subsequently with 70～100 ℃/speed at one hour rating, 1010～1050 ℃ of soaking time experimental formula t (h)=0.015h/mm* module thickness (mm)+6.5h routinely calculate; Quenching medium is F-2000; Cool time with experimental formula t (minute)=0.5* module thickness (mm)-24 calculates; The module oil outlet temperature is controlled at 160～200 ℃ of fuel-displaced 4.5～5.5 minutes module table surface temperatures;
(2) the module tempering process is: module is advanced the stove tempering after quenching immediately; During the tempering heating, 140～160 ℃ of insulations 3～6 hours; Subsequently, be warming up in 550～600 ℃ of definite temperature ranges, after the insulation, air cooling; Tempered structure is cryptocrystalline martensite+granular carbide.
2. the preparation production method of the big module of 4Cr16Mo die steel minute surface according to claim 1, it is characterized in that: the chemical element composition of steel is: 0.35～0.41%C, 0.50～0.80%Mn, 0.50～0.80%Si, S≤0.015%, P≤0.025%, 15～16%Cr, 0.10～0.60%Ni, 1.00～1.30%Mo; All the other are Fe; Unit is weight %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100251424A CN100402690C (en) | 2005-04-18 | 2005-04-18 | Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100251424A CN100402690C (en) | 2005-04-18 | 2005-04-18 | Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1676653A CN1676653A (en) | 2005-10-05 |
| CN100402690C true CN100402690C (en) | 2008-07-16 |
Family
ID=35049400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100251424A Active CN100402690C (en) | 2005-04-18 | 2005-04-18 | Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100402690C (en) |
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2904634B1 (en) * | 2006-08-03 | 2008-12-19 | Aubert & Duval Soc Par Actions | PROCESS FOR MANUFACTURING STEEL ELBOWS |
| FR2904635B1 (en) | 2006-08-03 | 2008-10-31 | Aubert & Duval Soc Par Actions | PROCESS FOR MANUFACTURING STEEL ELBOWS |
| CN101270451B (en) * | 2007-03-19 | 2011-03-30 | 宝山钢铁股份有限公司 | Plastic mold steel and method for manufacturing same |
| CN101899623A (en) * | 2010-07-12 | 2010-12-01 | 杭州龙云水利机械制造有限公司 | Special impeller for high-pressure corrosion-resistant high-power mud pump |
| CN102825424B (en) * | 2011-06-17 | 2016-01-20 | 南京梅山冶金发展有限公司 | A kind of production technology of high-performance cushion plate |
| CN104289873A (en) * | 2012-10-22 | 2015-01-21 | 宁波吉威熔模铸造有限公司 | Manufacturing method for front axle of automobile |
| EP3090071A4 (en) * | 2014-02-18 | 2017-09-27 | Uddeholms AB | Stainless steel for a plastic mould and a mould made of the stainless steel |
| JP5705345B1 (en) * | 2014-03-06 | 2015-04-22 | 日本高周波鋼業株式会社 | High mirror surface plastic mold steel |
| CN104942192B (en) * | 2014-03-27 | 2018-04-24 | 中交烟台环保疏浚有限公司 | The processing technology of dredge pump axle bearing set |
| CN104004966B (en) * | 2014-05-20 | 2016-04-20 | 滁州迪蒙德模具制造有限公司 | A kind of manufacture method of press tool |
| CN103981445B (en) * | 2014-05-26 | 2015-11-11 | 南平市双友金属有限公司 | H13 hot-work die steel production technique |
| CN104611642B (en) * | 2014-11-26 | 2017-04-05 | 中原特钢股份有限公司 | Production method of the mobile phone mould with the senior minute surface plastic mould materials of NAK80 |
| CN104531969B (en) * | 2014-12-19 | 2017-02-22 | 娄底市洪申科技有限公司 | Heat treatment method for reducing automobile insert deformation |
| CN105506249B (en) * | 2015-12-07 | 2018-05-04 | 东北大学 | A kind of heat treatment method of high nitrogen Corrosion Resistant Stainless Steel for Plastic Mould |
| CN106854738A (en) * | 2015-12-08 | 2017-06-16 | 重庆葛利兹模具技术有限公司上海分公司 | A kind of easy cutting plastic mold steel and its heat treatment method |
| CN106337106B (en) * | 2016-10-10 | 2018-10-09 | 燕山大学 | The removing method of SiC field trashes in high silicon steel |
| CN106320768A (en) * | 2016-10-11 | 2017-01-11 | 湖北卓骏自动化工业有限公司 | Circulation parking device |
| CN106636861B (en) * | 2016-12-23 | 2018-02-16 | 建龙北满特殊钢有限责任公司 | The preparation technology of high-alloy hot work mould steel |
| CN106624659B (en) * | 2017-01-13 | 2018-10-02 | 大楚神驰车轮股份有限公司 | A kind of manufacturing process of automobile wheel rim |
| CN106903246A (en) * | 2017-03-09 | 2017-06-30 | 中原特钢股份有限公司 | The forging technology of 2Cr11Mo1VNbN steel used for steam turbine blades forging |
| CN107354393A (en) * | 2017-06-23 | 2017-11-17 | 苏州艾酷玛赫设备制造有限公司 | Alloy mold and manufacture method |
| CN107164614A (en) * | 2017-07-20 | 2017-09-15 | 苏州市天星山精密模具有限公司 | A kind of Technology for Heating Processing of corrosion-resistant plastic mould |
| CN109694983B (en) * | 2017-10-20 | 2020-09-29 | 鞍钢股份有限公司 | High-mirror-surface corrosion-resistant plastic die steel and manufacturing method thereof |
| CN108866444B (en) * | 2018-07-26 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Corrosion-resistant mirror surface die steel and preparation method thereof |
| CN108950134B (en) * | 2018-08-21 | 2021-01-26 | 成都先进金属材料产业技术研究院有限公司 | Remelting method of electroslag ingot for cold roll |
| CN108842031B (en) * | 2018-09-05 | 2020-12-11 | 浙江永强集团股份有限公司 | Preparation process of high-toughness strong acid-resistant martensitic stainless steel for furniture |
| CN109023104B (en) * | 2018-09-25 | 2021-01-26 | 成都先进金属材料产业技术研究院有限公司 | 4Cr13 plastic die steel and preparation method thereof |
| CN109402505A (en) * | 2018-10-26 | 2019-03-01 | 朱经辉 | A kind of high mirror surface acid-proof plastic mould Steel material of pre- stiffened and preparation method thereof |
| CN111172448B (en) * | 2018-11-12 | 2021-09-24 | 中国科学院金属研究所 | Preparation method of thick, large and high-homogeneity plastic die steel |
| CN109825688B (en) * | 2019-03-06 | 2020-12-25 | 江苏品模信息科技有限公司 | Hot working process for P20 and 718 plastic die steel |
| CN110438404A (en) * | 2019-09-09 | 2019-11-12 | 山东泰山钢铁集团有限公司 | A kind of the ingredient design and control technology of measurer slide calliper rule steel |
| CN111270061A (en) * | 2020-02-13 | 2020-06-12 | 江油市长祥特殊钢制造有限公司 | Preparation method of 8407 hot-working die-casting die steel |
| CN112322965A (en) * | 2020-09-15 | 2021-02-05 | 舞阳钢铁有限责任公司 | Corrosion-resistant die steel plate and production method thereof |
| CN112375987A (en) * | 2020-11-20 | 2021-02-19 | 河南中原特钢装备制造有限公司 | Nitrogen-added corrosion-resistant plastic die steel and manufacturing method thereof |
| CN113549742B (en) * | 2021-07-23 | 2023-06-16 | 攀钢集团江油长城特殊钢有限公司 | Annealing method of 3Cr17NiMo electroslag ingot |
| CN113652527A (en) * | 2021-08-14 | 2021-11-16 | 张家港市品杰模塑科技有限公司 | Production process of plastic die steel |
| 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 |
| CN116904865B (en) * | 2023-09-14 | 2023-12-01 | 成都先进金属材料产业技术研究院股份有限公司 | Large-specification 3Cr17 plastic die steel and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| CN1340632A (en) * | 2000-08-25 | 2002-03-20 | 杨凡 | Stainless die steel for plastics |
| CN1436251A (en) * | 2000-06-15 | 2003-08-13 | 尤迪霍尔姆工具公司 | Steel alloy, plastic moulding tool and tough-hardened blank for plastic moulding tools |
| CN1515699A (en) * | 2003-08-28 | 2004-07-28 | 章邦东 | Martensitic stainless steel |
| CN1544179A (en) * | 2003-11-27 | 2004-11-10 | 宝钢集团上海五钢有限公司 | Hot working method of die steel large-scale modular forgings |
-
2005
- 2005-04-18 CN CNB2005100251424A patent/CN100402690C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| CN1436251A (en) * | 2000-06-15 | 2003-08-13 | 尤迪霍尔姆工具公司 | Steel alloy, plastic moulding tool and tough-hardened blank for plastic moulding tools |
| CN1340632A (en) * | 2000-08-25 | 2002-03-20 | 杨凡 | Stainless die steel for plastics |
| CN1515699A (en) * | 2003-08-28 | 2004-07-28 | 章邦东 | Martensitic stainless steel |
| CN1544179A (en) * | 2003-11-27 | 2004-11-10 | 宝钢集团上海五钢有限公司 | Hot working method of die steel large-scale modular forgings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1676653A (en) | 2005-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100402690C (en) | Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method | |
| CN100485075C (en) | High-carbon high-vanadium high-speed steel composite roller and heat treatment method thereof | |
| CN102330016B (en) | Preparation method of hypoeutectic high-chromium white cast iron | |
| CN101407891B (en) | Boron-containing semi-high speed steel cold roller and manufacturing method thereof | |
| CN102242316B (en) | H13 die steel and preparation method thereof | |
| CN102230130B (en) | Wear-resistant plastic die steel and preparation method thereof | |
| CN102618799B (en) | High-performance quenched and tempered steel plate with 80 kg carbon equivalent and manufacturing method of high-performance quenched and tempered steel plate | |
| CN100999803A (en) | High boron wear-resisting casting steel and preparation process thereof | |
| CN109023119A (en) | A kind of abrasion-resistant stee and its manufacturing method with excellent plasticity and toughness | |
| CN100422371C (en) | Chromic-nickel-free high-strength high ductility structural steel and manufacturing method thereof | |
| CN110438388B (en) | Preparation method of Australian alternate wear-resistant corrosion-resistant steel | |
| CN106086639B (en) | A kind of strong steel for engineering machinery Q960D of superelevation and its production method | |
| CN113122776A (en) | High-strength high-toughness medium-and large-diameter non-quenched and tempered steel for direct cutting and production process thereof | |
| CN107287506B (en) | A kind of 650MPa grades of medium temperature and medium pressure boiler plate and its production method | |
| CN104561802A (en) | High-hardness high-toughness cold work die steel as well as preparation method thereof | |
| CN107604248A (en) | A kind of high intensity Q500GJD quenched and tempered states steel plate for building structure and its manufacture method | |
| CN114959497B (en) | Pre-hardened alloy plastic die steel and production method thereof | |
| CN102828124A (en) | Non-quenched/tempered heavy plate for low-temperature pressure vessel and production method thereof | |
| CN101942606B (en) | Nitrogen alloyed austenitic hot work die steel and preparation method thereof | |
| CN108441780B (en) | A kind of pre- duroplasts steel plate of die steel of Micro Alloying and its preparation process | |
| CN104532150B (en) | Economical and ultra-wide saw steel and preparation method thereof | |
| CN109694983A (en) | A kind of high mirror surface corrosion-resistant plastic mould steel and its manufacturing method | |
| CN109112391A (en) | A kind of hot die steel and preparation method thereof | |
| CN111534744A (en) | Steel for die casting wear-resistant chain plate and manufacturing method thereof | |
| CN100545290C (en) | A kind of thermal treatment ultra-fine crystal D grade sucker rod sucker rod of exempting from is with steel and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER OWNER: SHANGHAI NO.5 IRON AND STEEL CO LTD, BAOSHAN IRON AND STEEL GROUP Effective date: 20081107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081107 Address after: Orchard, Fujin Road, Baoshan District, Shanghai Patentee after: Baoshan Iron & Steel Co., Ltd. Address before: No. 333 Tongji Road, Shanghai, Baoshan District Patentee before: Shanghai No.5 Iron and steel Co., Ltd., Baoshan Iron and Steel Group |
|
| ASS | Succession or assignment of patent right |
Owner name: BAOSTEEL SPECIAL STEEL CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20131210 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200940 BAOSHAN, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131210 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIALSTEEL CO., LTD. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: Baoshan Iron & Steel Co., Ltd. Effective date of registration: 20131210 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIALSTEEL CO., LTD. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: Baoshan Iron & Steel Co., Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20200512 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co., Ltd Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |
|
| TR01 | Transfer of patent right |