CN103774053B - A kind of composite roll upper layer high hardness alloy steel and preparation method thereof - Google Patents
A kind of composite roll upper layer high hardness alloy steel and preparation method thereof Download PDFInfo
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- CN103774053B CN103774053B CN201310701649.1A CN201310701649A CN103774053B CN 103774053 B CN103774053 B CN 103774053B CN 201310701649 A CN201310701649 A CN 201310701649A CN 103774053 B CN103774053 B CN 103774053B
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- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000007670 refining Methods 0.000 claims abstract description 19
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000005275 alloying Methods 0.000 claims abstract description 14
- 239000011651 chromium Substances 0.000 claims abstract description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 9
- 239000010955 niobium Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 239000011733 molybdenum Substances 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 239000010941 cobalt Substances 0.000 claims abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910000805 Pig iron Inorganic materials 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 239000010977 jade Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims 1
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
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
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
A kind of composite roll upper layer high hardness alloy steel, the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 2.2-2.5, vanadium 0.5-0.8, chromium 3.5-4.0, niobium 0.05-0.10, cerium 0.05-0.10, nickel 1.4-1.6, cobalt 0.06-0.09, P≤0.030, S≤0.030, surplus are iron.The present invention by adding the multiple alloying elements such as nickel, niobium, cerium on the basis of high carbon steel, and through secondary refining, conservative control casts postheat treatment temperature, throwing raw materials in batches, steel alloy is had high temperature resistant, red hard height, hardness and toughness are worked good, and it is good to have surface abrasion resistance, resistance to flaking is good, cold shortness is low, good processability, strong with middle layer bonding force, be suitable for the upper layer of composite roll, hardness is even, long service life.
Description
Technical field
The present invention relates to roll technology field, particularly relate to a kind of composite roll upper layer high hardness alloy steel and preparation method thereof.
Background technology
Roll is the central module of wire rod machine, carries out gadolinium processing to gadolinium part, makes metal produce the main tool of viscous deformation.Roll working load is large, bears very large gadolinium pressing pressure and torsional moment, and has very strong shock load and very large mass force; In addition, the Working environment of roll is harsh, bear very high temperature, have water coolant again, is in the cold and hot lower work that accompanies each other, serious wear.
High carbon and chromium cast steel, the several types such as ordinary steel and Wimet.High carbon and chromium cast steel is owing to there being certain wear resistance, and low price, is therefore widely used, and the material that high carbon and chromium running roller steel is conventional has 13Cr13WMoV and 18Cr20WMoV.Because these two kinds of steel hardness and wear resistance mainly rely on the carbide Cr of chromium
7c
3and Cr
23c
6, thermostability is poor, generally more than 450 DEG C, starts agglomeration and softens gradually.550 DEG C time, hardness will be down to below HRC50.And the temperature of wire rod running roller under running can reach about 550 DEG C, this just makes running roller obviously reduce work-ing life.The secondary hardening temperature of ordinary steel is at about 550 DEG C, and hardness maintains HRC62 ~ 64, can improve the work-ing life of running roller significantly; Wimet also has good hot hardness and wear resistance.But because the manufacturing cost of ordinary steel and Wimet is too high, the use of high line running roller material is restricted.Therefore study excellent performance, the roll material that cost is cheaper just seems particularly important.
Summary of the invention
The object of the present invention is to provide a kind of composite roll upper layer high hardness alloy steel and preparation method thereof, this alloy material has that hardness is high, wear resistance good, resistant to elevated temperatures advantage.
Technical scheme of the present invention is as follows:
A kind of composite roll upper layer high hardness alloy steel, is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 2.2-2.5, vanadium 0.5-0.8, chromium 3.5-4.0, niobium 0.05-0.10, cerium 0.05-0.10, nickel 1.4-1.6, cobalt 0.06-0.09, P≤0.030, S≤0.030, surplus are iron.
The production method of described composite roll upper layer high hardness alloy steel, is characterized in that:
(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:0.5-1.5 ratio, the pig iron is added drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) vanadium, chromium; (2) tungsten, molybdenum, niobium; (3) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, stirs after feeding intake.
Described casting postheat treatment is: first by room temperature with 200-210 DEG C/h of ramp to 660-670 DEG C, insulation 40-50 minute, then with 220-230 DEG C/h of ramp to 970-980 DEG C, insulation 4-5 hour; 570-580 DEG C is cooled to again with 170-180 DEG C/h of speed, then with 210-220 DEG C/h of ramp to 720-730 DEG C, then be cooled to 220-230 DEG C with 170-180 DEG C/h of speed, insulation 3-4 hour; Again with 100-110 DEG C/h of ramp to 340-350 DEG C, insulation 40-50 minute, then with 100-110 DEG C/h of ramp to 520-530 DEG C, insulation 3-4 hour, takes out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-5, clay 10-12, Sodium Silicofluoride 3-4, sodium carbonate 2-3, sodium tetraborate 1-2, stalk ashes 4-5, potassium felspar sand 36-40, jade powder 3-4, carclazyte 6-8, ground dolomite 3-4; Each raw material mixes by preparation method, is heated to 2600-2900 DEG C to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Beneficial effect of the present invention
The present invention by adding the multiple alloying elements such as nickel, niobium, cerium on the basis of high carbon steel, and through secondary refining, conservative control casts postheat treatment temperature, throwing raw materials in batches, steel alloy is had high temperature resistant, red hard height, hardness degree and toughness are worked good, and it is good to have surface abrasion resistance, resistance to flaking is good, cold shortness is low, good processability, strong with middle layer bonding force, be suitable for the upper layer of composite roll, hardness is even, long service life.The present invention uses part scrap iron as raw material, makes alloy quality more stable uniform, improves comprehensive mechanical property.Refining agent of the present invention is used for Foundry Production, significantly improves yield rate, and the degree of porosity particularly in foundry goods reduces 1-2 degree, and can not produce pore at cast(ing) surface, trapped oxide also obviously reduces, and oxide inclusion is at about 2 grades.
Embodiment
A kind of composite roll upper layer high hardness alloy steel, the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 2.2-2.5, vanadium 0.5-0.8, chromium 3.5-4.0, niobium 0.05-0.10, cerium 0.05-0.10, nickel 1.4-1.6, cobalt 0.06-0.09, P≤0.030, S≤0.030, surplus are iron.
The production method of described composite roll upper layer high hardness alloy steel is:
(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:1 ratio, the pig iron is added drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) vanadium, chromium; (2) tungsten, molybdenum, niobium; (3) other remaining components; The each batch of timed interval of dropping into element is 24 minutes, stirs after feeding intake.
Described casting postheat treatment is: elder generation with 205 DEG C/h of ramp to 665 DEG C by room temperature, is incubated 45 minutes, then with 225 DEG C/h of ramp to 975 DEG C, is incubated 4.5 hours; 575 DEG C are cooled to again with 175 DEG C/h of speed, then with 215 DEG C/h of ramp to 725 DEG C, then be cooled to 225 DEG C with 175 DEG C/h of speed, be incubated 3.5 hours; Again with 105 DEG C/h of ramp to 345 DEG C, be incubated 45 minutes, then with 105 DEG C/h of ramp to 525 DEG C, be incubated 3.5 hours, take out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part (kilogram): described refining agent is made up of the raw material of following weight part (kilogram): instrument comminuted steel shot 3, clay 10, Sodium Silicofluoride 4, sodium carbonate 2, sodium tetraborate 1, stalk ashes 4, potassium felspar sand 36, jade powder 3, carclazyte 6, ground dolomite 3; Each raw material mixes by preparation method, is heated to 2600-2900 DEG C to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
The mechanical property of composite roll upper layer high hardness alloy steel of the present invention is: tensile strength 1289MPa, yield strength 918MPa, unit elongation 15%, relative reduction in area 37%, impact absorbing energy 56J, impelling strength 66J/cm2, hardness 289HB.
Claims (1)
1. a composite roll upper layer high hardness alloy steel, is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.5-3, molybdenum 2.2-2.5, vanadium 0.5-0.8, chromium 3.5-4.0, niobium 0.05-0.10, cerium 0.05-0.10, nickel 1.4-1.6, cobalt 0.06-0.09, P≤0.030, S≤0.030, surplus are iron;
The production method of described composite roll upper layer high hardness alloy steel, comprises the following steps:
(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:0.5-1.5 ratio, the pig iron is dropped in stove and melts, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment;
(2) lot sequence, dropping into alloying element in alloying process in stove is: (a) vanadium, chromium; (b) tungsten, molybdenum, niobium; (c) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, stirs after feeding intake;
Described casting postheat treatment is: first by room temperature with 200-210 DEG C/h of ramp to 660-670 DEG C, insulation 40-50 minute, then with 220-230 DEG C/h of ramp to 970-980 DEG C, insulation 4-5 hour; 570-580 DEG C is cooled to again with 170-180 DEG C/h of speed, then with 210-220 DEG C/h of ramp to 720-730 DEG C, then be cooled to 220-230 DEG C with 170-180 DEG C/h of speed, insulation 3-4 hour; Again with 100-110 DEG C/h of ramp to 340-350 DEG C, insulation 40-50 minute, then with 100-110 DEG C/h of ramp to 520-530 DEG C, insulation 3-4 hour, takes out air cooling and get final product;
Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-5, clay 10-12, Sodium Silicofluoride 3-4, sodium carbonate 2-3, sodium tetraborate 1-2, stalk ashes 4-5, potassium felspar sand 36-40, jade powder 3-4, carclazyte 6-8, ground dolomite 3-4; Each raw material mixes by preparation method, is heated to 2600-2900 DEG C to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701649.1A CN103774053B (en) | 2013-12-19 | 2013-12-19 | A kind of composite roll upper layer high hardness alloy steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701649.1A CN103774053B (en) | 2013-12-19 | 2013-12-19 | A kind of composite roll upper layer high hardness alloy steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103774053A CN103774053A (en) | 2014-05-07 |
| CN103774053B true CN103774053B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310701649.1A Expired - Fee Related CN103774053B (en) | 2013-12-19 | 2013-12-19 | A kind of composite roll upper layer high hardness alloy steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103774053B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139394B (en) * | 2019-12-24 | 2022-01-11 | 中钢集团邢台机械轧辊有限公司 | Preparation method of high-performance rough rolling working roll |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104669A (en) * | 1985-07-08 | 1987-02-18 | 查瓦尼·凯丁 | Forged roll for cold rolling |
| JPH02298234A (en) * | 1989-05-10 | 1990-12-10 | Hitachi Metals Ltd | Tool steel for warm and hot working |
| JP2003286543A (en) * | 2002-03-28 | 2003-10-10 | Nippon Steel Corp | HIGH-STRENGTH, LOW-Cr FERRITIC STEEL PIPE FOR BOILER SHOWING EXCELLENT LONG-TERM CREEP PROPERTIES AND ITS MANUFACTURING PROCESS |
| JP2004100027A (en) * | 2002-09-12 | 2004-04-02 | Nippon Steel Corp | Steel for liquid-phase diffusion bonding having excellent resistance to low-temperature transformation crack |
| CN102041454A (en) * | 2009-10-21 | 2011-05-04 | 宝山钢铁股份有限公司 | High hardness steel for forging and forming cold roller |
-
2013
- 2013-12-19 CN CN201310701649.1A patent/CN103774053B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104669A (en) * | 1985-07-08 | 1987-02-18 | 查瓦尼·凯丁 | Forged roll for cold rolling |
| JPH02298234A (en) * | 1989-05-10 | 1990-12-10 | Hitachi Metals Ltd | Tool steel for warm and hot working |
| JP2003286543A (en) * | 2002-03-28 | 2003-10-10 | Nippon Steel Corp | HIGH-STRENGTH, LOW-Cr FERRITIC STEEL PIPE FOR BOILER SHOWING EXCELLENT LONG-TERM CREEP PROPERTIES AND ITS MANUFACTURING PROCESS |
| JP2004100027A (en) * | 2002-09-12 | 2004-04-02 | Nippon Steel Corp | Steel for liquid-phase diffusion bonding having excellent resistance to low-temperature transformation crack |
| CN102041454A (en) * | 2009-10-21 | 2011-05-04 | 宝山钢铁股份有限公司 | High hardness steel for forging and forming cold roller |
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| CN103774053A (en) | 2014-05-07 |
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Denomination of invention: High-hardness alloy steel material for composite roller surface layer and preparation method thereof Effective date of registration: 20190423 Granted publication date: 20151125 Pledgee: Huizhou bank Limited by Share Ltd. Ma'anshan Development Zone Branch Pledgor: MAANSHAN FANGYUAN MATERIAL ENGINEERING CO.,LTD. Registration number: 2019340000211 |
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