CN106086673A - A kind of hot-work die steel plate and preparation method thereof - Google Patents
A kind of hot-work die steel plate and preparation method thereof Download PDFInfo
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- CN106086673A CN106086673A CN201610459770.1A CN201610459770A CN106086673A CN 106086673 A CN106086673 A CN 106086673A CN 201610459770 A CN201610459770 A CN 201610459770A CN 106086673 A CN106086673 A CN 106086673A
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—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
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
The present invention relates to a kind of hot-work die steel plate, the chemical composition of this steel plate % by weight percent is calculated as, C:0.45～0.55, Si:0.20～0.80, Mn:0.50～0.80, Cr:3.00～3.50, Mo:1.30～1.80, V:0.05～0.20, Nb:0.02～0.10, Als:0.01～0.04, P≤0.015, S≤0.005, remaining is Fe and inevitable impurity.Technological process is that steel casting Heating Steel Ingots cogging expansion hydrogen adds hot-rolled steel heat treatment, provide the production method of a kind of brand-new hot-work die steel plate, steel plate itself has good comprehensive mechanical performance, its preparation method production stability is good, technological process is succinct, it is simple to produce hot die steel quantitatively.
Description
Technical field
The present invention relates to hot die steel and preparation method thereof.
Background technology
In recent years, China's mould steel industry develops rapidly, and China's hot die steel research aspect also achieves bigger entering
Exhibition, the performance of hot die steel is had higher requirement by the fast development of modern manufacturing industry.Improve hot-work die Steel Properties
Mainly there are two approach: one is to optimize steel grades and exploitation new steel grade；Two is to improve life on the basis of frozen composition
Runoff yield journey and optimization Technology.China's i.e. research and development to hot die steel in " 12 " plan propose clear and definite
Requirement.
, to forge material, also there is the pole become a useful person with rolling mill practice of a part in domestic hot die steel, but rolling mill practice
The hot-work die steel plate production scale become a useful person is difficult to scale up, and reason is mainly two aspects: one is to generally believe that rolling mill practice is become a useful person
Hot-work die steel plate heart portion second-rate, be not suitable for making more high-grade mould.Two is that domestic employing continuous casting and rolling method is raw
Producing hot die steel, whole technological process is complicated, it is difficult to controlling, conforming product rate is low.
Summary of the invention
The technical problem to be solved is to provide a kind of hot die steel and preparation thereof for above-mentioned prior art
Method, utilizes heavy and medium plate mill, becomes a useful person with static ingot, by reasonably heating, rolling and Technology for Heating Processing, produces and adds
Work is functional, thermal fatigue resistance is high, the preferable steel plate of quenching degree.And technical process is simple, easily-controlled operation, significantly improve
The qualification rate of product.
The present invention solves the technical scheme that the problems referred to above are used: a kind of hot-work die steel plate, the chemistry one-tenth of this steel plate
% by weight percent is divided to be calculated as, C:0.45～0.55, Si:0.20～0.80, Mn:0.50～0.80, Cr:3.00～3.50,
Mo:1.30～1.80, V:0.05～0.20, Nb:0.02～0.10, Als:0.01～0.04, P≤0.015, S≤0.005, its
Remaining is Fe and inevitable impurity.
The design principle of steel plate chemical composition of the present invention is as follows:
The solution strengthening effect of C: carbon is notable, is to improve steel plate hardness and the maximally efficient element of intensity.After steel plate spheroidizing,
Carbon can separate out with the form of globular carbide, the beneficially machining of hot die steel.But carbon content is unsuitable too high, too high
Phosphorus content can reduce steel plate toughness, to the following process of hot die steel and use unfavorable, the present invention controls the interval of carbon and exists
0.45～0.55%.
Si: silicon is the essential elements of deoxidation in steel making, it may have certain solution strengthening effect, and suitable silicone content can show
Writing the elastic limit improving steel, yield point and tensile strength, the present invention controls the scope of silicon 0.20～0.80%.
Mn: in view of the high temperature rolling technique of this hot die steel, sets Fe content unsuitable too high, it is to avoid steel grade crystal grain mistake
Dividing thick tendency, the present invention controls the scope of manganese at 0.50-0.80%.
The carbide that V: vanadium is formed with carbon, can improve steel grade resistant to hydrogen corrosive power under High Temperature High Pressure；Vanadium is in ferrous materials
Being easier to the alloying element of solid solution, its carbonitride formed has the advantage of uniqueness in terms of precipitation strength, and the present invention controls vanadium
Scope at 0.05-0.20%.
Nb: niobium is a kind of strong carbonitride-forming elements, and when can effectively stop soaking, austenite crystal grows up, significantly
Improve steel without recrystallization temperature, enable steel plate to carry out non-recrystallization rolling within the scope of higher and wider temperature, this
The scope of bright control niobium is at 0.02-0.10%.
Cr: chromium is the element improving steel hardenability, it is possible to suppression polygonal ferrite and the formation of pearlite, promotes low temperature
Tissue bainite or the transformation of martensite, improve the intensity of steel, hardness and wearability, it addition, chromium can improve steel ingot corrosion resistant
Erosion performance.In the present invention, chromium content controls 3.00～3.50%.
Mo: molybdenum can refine steel grade crystal grain, improves the quenching degree of steel, thermostrength and red hardness, keeps when high temperature
Enough intensity and creep resisting ability, the molybdenum content of the present invention controls 1.30～1.80%.
Al: aluminum is a kind of important deoxidant element in steelmaking process, adds the aluminum of trace in molten steel, can effectively reduce steel
In inclusion content, and play the effect of crystal grain thinning.But too much aluminum can promote the formation of B type impurity, reduce strand
Surface quality, in the present invention, aluminum content controls 0.01～0.04%.
The hot-work die steel plate of the present invention is to make material with Rolling from Ingot, and the step of manufacture method is as follows:
1) smelt: selecting high-quality steel scrap to carry out electric furnace smelting, use furnace bottom paver ash manipulation, bubble is made in slag making operation in advance, stokehold
Foam slag melting and stay steel remaining slag operation, obtains low P molten steel；Molten steel, through LF deoxidation operation, carries out VD vacuum and takes off deoxidation molten steel
Gas disposal, it is desirable to final vacuum is at below 67Pa, and the dwell time is not less than 15min, feeds silicon-calcium wire afterwards, carries out field trash change
Property, soft blow more than argon 5min after line feeding；
2) casting: control molten steel overheat 20～30 DEG C, omnidistance employing argon shield casting, it is cast into anistree cast slab；
3) heating: steel ingot band mould heat delivers to steel rolling process, band mould heat send the time: >=7 hours；Clear up in time after the steel ingot demoulding into
Stove, after steel loading, stewing steel more than 6 hours, with the heating rate of 80～100 DEG C/h, are warming up to 950-1000 DEG C, are incubated 8-10 hour
After again with the heating rate of 50～70 DEG C/h, be warming up to 1220-1280 DEG C, soaking zone temperature 1240-1260 DEG C；
4) split rolling method: start rolling temperature 950-1050 DEG C, uses the big soft reduction process of low speed to roll, single pass drafts >=10%, always
Compression ratio is 50～60%；
5) hydrogen is expanded: enter heating furnace heating after steel ingot cogging and make to expand hydrogen process, it is desirable to billet surface temperature >=550 DEG C, stove when entering stove
Temperature ＞ 500 DEG C, annealing temperature is set to 640 ± 10 DEG C, be incubated 48 hours and more than, furnace cooling after insulation；Want according to producing
Ask size to steel plate strip temperature segmentation, check billet surface quality in time, defective place band temperature is cleared up；
6) heating steel billet: steel billet band temperature enters stove heating, and heating rate, temperature retention time and maximum heating temperature are with reference to step 3)
Heating Steel Ingots parameter；
7) steel rolling: include roughing and finish rolling two sections, roughing start rolling temperature 1000 ± 20 DEG C, single pass drafts >=10%, finish rolling essence
Really control to treat temperature thickness and temperature, treat temperature thickness 100-150mm, treat temperature temperature 900-940 DEG C；The operation of rolling needs 2～3 sub-high pressures
Water de-scaling, it is ensured that plate surface quality；Rolling terminate before increase by 2～3 planishing passes, it is ensured that steel plate flatness, roll rear steel plate and
Time enter cover heap slow cooling；
8) heat treatment: steel plate enters car type furnace and makees spheroidizing process, and steel plate enters stove needs preferred dimension to be more than the auxiliary slab of steel plate
Lower berth upper cover, sheet pack adds shove charge, is not added with cushion block between steel plate, it is ensured that steel plate template；Steel plate divides two sections of annealing temperatures.First rank
Section holding temperature 840 ± 10 DEG C, temperature retention time 3-8 hour, it is cooled to 700 ± 10 DEG C with the cooling rate of no more than 30 DEG C/h, carries out
Second stage is incubated, and temperature retention time 3-8 hour is cooled to 300 DEG C with the cooling rate of no more than 30 DEG C/h and comes out of the stove, finally gives ball
Annealing state hot-work die steel plate.
Compared with prior art, it is an advantage of the current invention that:
(1) hot die steel of the present invention belongs to middle carbon high-alloy steel, and crack sensitivity is strong.For cold after avoiding the static ingot demoulding
The most too fast generation face crack, steel ingot needs band temperature to enter soaking pit, and soaking pit needs preheating, sets stewing steel operation, slows down steel ingot
Rate of cooling.
(2) present invention uses soaking pit to heat steel ingot, designs zone heating system, strictly sets the rate of heat addition,
Guarantee the penetrating, uniformly of heating.
(3) steel ingot is provided with cogging operation, uses the rolling of low speed big soft reduction process in breaking down high temperature section, it is ensured that rolling deformation
Strand core can be penetrated into.
(4) present invention uses Steel material to expand hydrogen technique, finds out this hot die steel by laboratory and reasonably expands hydrogen temperature
Degree and time be applied to actual production.Carry out the steel plate after steel ingot cogging expanding hydrogen heat treatment, be favorably improved big thickness
The heart portion quality of steel plate, makees good place mat for further rolling process.
(5) the perfect supply of material kind of enterprise of hot-work die steel plate that the present invention produces, replaces forging material with stocking, solves
Domestic with " continuous casting and direct rolling " production model production difficulty, properties of product are unstable, the technical barrier that product qualified rate is low.
This application provides the production method of a kind of brand-new hot-work die steel plate, steel plate itself has good integrated machine
Tool performance, its preparation method production stability is good, and technological process is succinct, it is simple to produce hot die steel quantitatively.
Accompanying drawing explanation
Fig. 1 be in the embodiment of the present invention hot-work die steel plate along the tissue morphology figure at 1/4 thickness of slab；
Fig. 2 hot die steel cricket annealing process curve figure；
Fig. 3 hot die steel cricket annealing shove charge schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
The production technology of a kind of hot-work die steel plate, this production technology uses the design of suitable composition, belongs to middle carbon height and closes
Jin Gang, the chemical composition of steel plate % by weight percent are C:0.45～0.55, Si:0.20～0.80, Mn:0.50～0.80,
Cr:3.00～3.50, Mo:1.30～1.80, V:0.05～0.20, Nb:0.02～0.10, Als:0.01～0.04, P≤
0.015, S≤0.005, remaining is Fe and inevitable impurity.
Specifically comprise the following steps that
1) smelt: selecting high-quality steel scrap to carry out electric furnace smelting, use furnace bottom paver ash manipulation, bubble is made in slag making operation in advance, stokehold
Foam slag melting and stay steel remaining slag operation, obtains low P molten steel；Molten steel, through LF deoxidation operation, strictly controls refining time, and carries out
Line feeding operates；Deoxidation molten steel is carried out VD Fruit storage, it is desirable to final vacuum was not less than in below 67Pa, dwell time
15min, feeds silicon-calcium wire afterwards, carries out inclusion modification, soft blow more than argon 5min after line feeding；
2) casting: control molten steel overheat 20～30 DEG C, omnidistance employing argon shield casting, it is cast into anistree cast slab；
3) heating: steel ingot band mould heat delivers to steel rolling process, band mould heat send the time: >=7 hours；Clear up in time after the steel ingot demoulding into
Stove, after steel loading, stewing steel more than 6 hours, with the heating rate of 80～100 DEG C/h, are warming up to 1000 DEG C, after being incubated 8-10 hour again
With the heating rate of 50～70 DEG C/h, it is warming up to 1280 DEG C, soaking zone temperature 1260 DEG C；
4) split rolling method: start rolling temperature 950-1050 DEG C, uses the big soft reduction process of low speed to roll, single pass drafts >=10%, always
Compression ratio is 50～60%；
5) hydrogen is expanded: enter heating furnace heating after steel ingot cogging and make to expand hydrogen process, it is desirable to billet surface temperature >=550 DEG C, stove when entering stove
Temperature ＞ 500 DEG C, annealing temperature is set to 640 ± 10 DEG C, be incubated 48 hours and more than, furnace cooling after insulation；Want according to producing
Ask size to steel plate strip temperature segmentation, check billet surface quality in time, defective place band temperature is cleared up；
6) heating steel billet: steel billet band temperature enters stove heating, and heating rate, temperature retention time and maximum heating temperature are with reference to step 3)
Heating Steel Ingots parameter；
7) steel rolling: include roughing and finish rolling two sections, roughing start rolling temperature 1000 ± 20 DEG C, single pass drafts >=10%, finish rolling essence
Really control to treat temperature thickness, treat temperature thickness 100-150mm, and treat temperature temperature, 900-940 DEG C；The operation of rolling needs 2～3 sub-high pressures
Water de-scaling, it is ensured that plate surface quality；Rolling terminate before increase by 2～3 planishing passes, it is ensured that steel plate flatness, roll rear steel plate and
Time enter cover heap slow cooling；
8) heat treatment: steel plate enters car type furnace and makees spheroidizing process, and steel plate enters stove needs preferred dimension to be more than the auxiliary slab of steel plate
Lower berth upper cover, sheet pack adds shove charge, is not added with cushion block between steel plate, it is ensured that steel plate template；Steel plate divides two sections of annealing temperatures.First rank
Section holding temperature 840 ± 10 DEG C, temperature retention time 3-8 hour, it is cooled to 700 ± 10 DEG C with the cooling rate of no more than 30 DEG C/h, carries out
Second stage is incubated, and temperature retention time 3-8 hour is cooled to 300 DEG C with the cooling rate of no more than 30 DEG C/h and comes out of the stove, finally gives ball
Annealing state hot-work die steel plate.
The hot-work die steel plate that above-mentioned technique produces can meet ASTM E381-01 standard, deposits without shrinkage cavity, sand holes, bubble
, S2-R2-C3 requirement can be met.Specifying according to ASTM E-112, steel plate average austenite grain degree reaches more than 7.0 grades.
Checking field trash according to ASTM E45 (A method), the total rank of field trash is not more than 2.5 grades.Steel plate even tissue, as it is shown in figure 1, be
Metallographic structure at hot-work die steel plate thickness 1/4, in tissue, black ball compound is the spheroidized carbide that spheroidizing is formed, ball
Steel plate hardness≤229HB after annealing, meets the process requirements of user.Utilize the hot-work die steel plate that this technique produces at warp
After crossing the heat treatment of " normalizing (air cooling)+lonneal ", hardness number reaches more than 56HRC, and steel plate combination property is good, especially
Being grain size and plate surface quality is relatively forged material and increased, this technique production cost relatively forges technique of becoming a useful person and is greatly lowered.
Claims (2)
1. a hot-work die steel plate, it is characterised in that: the chemical composition of this steel plate % by weight percent is calculated as, C:0.45～
0.55, Si:0.20～0.80, Mn:0.50～0.80, Cr:3.00～3.50, Mo:1.30～1.80, V:0.05～0.20, Nb:
0.02～0.10, Als:0.01～0.04, P≤0.015, S≤0.005, remaining is Fe and inevitable impurity.
2. the method for the hot-work die steel plate described in a manufacturing claims 1, it is characterised in that: make material with Rolling from Ingot, step
Rapid as follows:
1) smelt: selecting high-quality steel scrap to carry out electric furnace smelting, use furnace bottom paver ash manipulation, bubble is made in slag making operation in advance, stokehold
Foam slag melting and stay steel remaining slag operation, obtains low P molten steel；Molten steel is through LF deoxidation operation, and carries out line feeding operation；To dexidized steel
Water carries out VD Fruit storage, it is desirable to final vacuum is at below 67Pa, and the dwell time is not less than 15min, feeds silico-calcium afterwards
Line, carries out inclusion modification, soft blow more than argon 5min after line feeding；
2) casting: control molten steel overheat 20～30 DEG C, omnidistance employing argon shield casting, it is cast into anistree cast slab；
3) heating: steel ingot band mould heat delivers to steel rolling process, band mould heat send the time: >=7 hours；Clear up in time after the steel ingot demoulding into
Stove, after steel loading, stewing steel more than 6 hours, with the heating rate of 80～100 DEG C/h, are warming up to 950-1000 DEG C, are incubated 8-10 hour
After again with the heating rate of 50～70 DEG C/h, be warming up to 1220-1280 DEG C, soaking zone temperature 1240-1260 DEG C；
4) split rolling method: start rolling temperature 950-1050 DEG C, uses the big soft reduction process of low speed to roll, single pass drafts >=10%, always
Compression ratio is 50～60%；
5) hydrogen is expanded: enter heating furnace heating after steel ingot cogging and make to expand hydrogen process, it is desirable to billet surface temperature >=550 DEG C, stove when entering stove
Temperature ＞ 500 DEG C, annealing temperature is set to 640 ± 10 DEG C, be incubated 48 hours and more than, furnace cooling after insulation；Want according to producing
Ask size to steel plate strip temperature segmentation, check billet surface quality in time, defective place band temperature is cleared up；
6) heating steel billet: steel billet band temperature enters stove heating, and heating rate, temperature retention time and maximum heating temperature are with reference to step 3)
Heating Steel Ingots parameter；
7) steel rolling: include roughing and finish rolling two sections, roughing start rolling temperature 1000 ± 20 DEG C, single pass drafts >=10%, finish rolling essence
Really control to treat temperature thickness, treat temperature thickness 100-150mm, and treat temperature temperature 900-940 DEG C；The operation of rolling needs 2～3 second highest setting-out
De-scaling, it is ensured that plate surface quality；Rolling increases by 2～3 planishing passes before terminating, it is ensured that steel plate flatness, rolls rear steel plate timely
Enter cover heap slow cooling；
8) heat treatment: steel plate enters car type furnace and makees spheroidizing process, and steel plate enters stove needs preferred dimension to be more than the auxiliary slab of steel plate
Lower berth upper cover, sheet pack adds shove charge, is not added with cushion block between steel plate, it is ensured that steel plate template；Steel plate divides two sections of annealing temperatures, the first rank
Section holding temperature 840 ± 10 DEG C, temperature retention time 3-8 hour, it is cooled to 700 ± 10 DEG C with the cooling rate of no more than 30 DEG C/h, carries out
Second stage is incubated, and temperature retention time 3-8 hour is cooled to 300 DEG C with the cooling rate of no more than 30 DEG C/h and comes out of the stove, finally gives ball
Annealing state hot-work die steel plate.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011420A (en) * | 2016-07-20 | 2016-10-12 | 东南大学 | Preparing method for high-uniformity tool and mould steel |
| CN106670230A (en) * | 2016-12-23 | 2017-05-17 | 江苏沙钢集团淮钢特钢股份有限公司 | Large-size rectangular steel production process with cogging, continuous rolling and cooling control combined |
| CN109112391A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | A kind of hot die steel and preparation method thereof |
| CN109518084A (en) * | 2018-12-07 | 2019-03-26 | 南京工业职业技术学院 | A kind of high heat conductance is containing Al, Nb nitriding hot die steel and preparation method thereof |
| CN109759475A (en) * | 2019-01-14 | 2019-05-17 | 舞阳钢铁有限责任公司 | A kind of steel ingot is become a useful person the milling method of ultra-wide super thick Cr-Mo steel plate |
| CN109897945A (en) * | 2019-03-15 | 2019-06-18 | 舞阳钢铁有限责任公司 | A kind of steel ingot is become a useful person the production method of big thickness ultra-wide chrome molybdenum steel plate |
| CN110016537A (en) * | 2019-03-20 | 2019-07-16 | 江阴兴澄特种钢铁有限公司 | A kind of production method of plastic mould steel refining ingot casting low-sulfur, phosphorus and low inclusion content |
| CN110193574A (en) * | 2019-05-10 | 2019-09-03 | 舞阳钢铁有限责任公司 | The production technology of big substance spy's hard chromium molybdenum steel plate |
| CN110616373A (en) * | 2019-09-29 | 2019-12-27 | 舞阳钢铁有限责任公司 | Hot-work die steel plate and production method thereof |
| CN111876662A (en) * | 2020-06-18 | 2020-11-03 | 江阴兴澄特种钢铁有限公司 | Hot-work die steel plate and manufacturing method thereof |
| CN113718094A (en) * | 2021-08-18 | 2021-11-30 | 山西太钢不锈钢股份有限公司 | Manufacturing method of hot-work die steel medium plate |
| CN115109912A (en) * | 2022-06-30 | 2022-09-27 | 张家港宏昌钢板有限公司 | Efficient heat treatment method for multilayer wear-resistant steel plate |
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| CN1328169A (en) * | 2000-06-08 | 2001-12-26 | 顺德市世创金属科技有限公司 | Middle-alloy chromium series hot die steel |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011420B (en) * | 2016-07-20 | 2017-12-19 | 东南大学 | A kind of preparation method of high uniformity mould steel |
| CN106011420A (en) * | 2016-07-20 | 2016-10-12 | 东南大学 | Preparing method for high-uniformity tool and mould steel |
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