CN108707824A - A kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate and preparation method thereof - Google Patents
A kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate and preparation method thereof Download PDFInfo
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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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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Abstract
The invention discloses a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate and preparation method thereof, the chemical compositions and its weight percentage of the wear-resisting steel plate：C 0.08~0.30%, Si 0.10~0.50%, Mn 0.5~1.20%, Cr 0.15~1.00%, Mo 0.10~0.40%, Ni 0.05~0.50%, Ti 0.010~0.050%, Nb 0~0.030%, P≤0.010%, S≤0.002%, B 0.0010~0.0035%, Al 0.01~0.050%, Ca 0.0020~0.0040%, H≤0.00015%, O≤0.0025%, N≤0.0030%, wherein Ca/S=2~4, surplus are Fe and inevitable impurity.Preparation method includes desulfurizing iron, converter smelting, LF and RH refining treatments, continuous casting, heating strand, roughing and finish rolling, quenching and temper, furnace cooling after steel plate tempering.HBW330~HBW600 grades of the surface of steel plate Brinell hardness of the present invention has good anti-hydrogen-induced delayed cracking ability, and preparation method is simple, can be widely applied to the various complex working condition equipment wear parts in the fields such as coal mine machinery, engineering machinery.
Description
Technical field
The invention belongs to steel plate preparing technical fields, in particular it relates to a kind of anti-hydrogen-induced delayed cracking abrasion-resistant stee
Plate and preparation method thereof.
Background technology
Abrasion-resistant stee is widely used in the wear-resistant material of various wear working conditions, and with the progress of production Technology, new is resistance to
Mill steel steel grade emerges one after another, and smelts, casts, being heat-treated and process for machining is continuously improved, the comprehensive mechanical property of abrasion-resistant stee,
Wear-resisting property and service life are all stepping up, and application field increasingly expands.Engineering machinery, mining machinery, coal often is made
The component of machine such as mine machinery, crusher.
Domestic and international wear-resisting steel plate product at present, high rigidity rank wear-resistant steel products larger to thickness specification, in order to ensure quenching
Permeability and hardenability, composition design reaches performance indicator requirement by improving the elements such as C, Mn, Cr, B, V, Mo, but this measure is big
The crack sensitivity of steel plate and the risk factor of hydrogen induced cracking (HIC) are improved greatly, and abrasion-resistant stee easily occurs being exactly hydrogen induced cracking (HIC) problem
Crackle is also referred to as induced, due to the decomposition of water in steel scrap, air, is especially needed because generating clinker during smelting molten steel
Lime stone etc. is added, can bring the residual of hydrogen in molten steel, while in casting process, and there are the possibility of hydrogenation.It is cooled
Hydrogen has little time to discharge outward in journey, when the hydrogen sucked in steel reaches a certain concentration, can be gathered into hydrogen molecule, what this variation generated
Pressure, which increases, to be directly resulted in material internal and generates tiny crackle.With the raising of the strength of materials and hardness, the delay of steel is opened
Splitting sensibility generally can also increase, and abrasion-resistant stee may postpone as other high-strength steel when steel grade contains a small amount of hydrogen
Cracking, seriously affects subsequent use safety.During production and use it can also be seen that for think gauge high rigidity grade
There are the quality problems of hydrogen-induced delayed cracking during production, transport and use, largely effect on the qualification of product in other product
Rate constrains the producing in batches of steel plate, the normally supply of material and safety and reliability.The present invention is exactly to be passed through according to existing disadvantages
Scientific and reasonable ingredient and Design of Heat Treatment Process improves the anti-hydrogen-induced delayed cracking ability of abrasion-resistant stee.
Invention content
For the above-mentioned deficiency of the prior art, it is an object of the present invention to provide a kind of anti-hydrogen-induced delayed cracking is wear-resisting
Steel plate, meets user to thickness in 30-100mm, Brinell hardness HBW330~HBW600 grades of surface, tensile strength >=1100MPa,
Meet anti-hydrogen-induced delayed cracking simultaneously.Another is designed to provide a kind of preparation side of anti-hydrogen-induced delayed cracking wear-resisting steel plate
Method.
In order to achieve the above objectives, present invention employs the following technical solutions：
A kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, chemical composition and its weight percentage are：C 0.08~
0.30%, Si 0.10~0.50%, Mn 0.5~1.20%, Cr 0.15~1.00%, Mo 0.10~0.40%, Ni 0.05
~0.50%, Ti 0.010~0.050%, Nb 0~0.030%, P≤0.010%, S≤0.002%, B 0.0010~
0.0035%, Al 0.01~0.050%, Ca 0.0020~0.0040%, H≤0.00015%, O≤0.0025%, N≤
0.0030%, wherein Ca/S=2~4, surplus are Fe and inevitable impurity.
Brinell hardness HBW330~HBW600 grades of the surface of the steel plate, tensile strength >=1100MPa, thickness specification are
30-100mm。
A kind of preparation method of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the preparation method comprises the following steps：
(1) it smelts：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.002% hereinafter, phosphorus control 0.12% hereinafter,
Converter smelting, refining, vacuum degassing furnace are vacuum-treated；
(2) it casts：By step 1) treated molten steel send conticaster, continuous casting is using whole argon gas protective casting, continuous casting mistake
Temperature is controlled no more than 20 DEG C；
(3) heating of plate blank：Slab charging temperature is 200~400 DEG C, and heating of plate blank rate is 8~10min/cm, the slab heart
The temperature difference of portion and upper and lower surface controls within ± 15 DEG C, is rolled after heating；
(4) it rolls：Roughing and finish rolling two-phase control rolling, the accumulative pressure of finish rolling stage are completed using 4300mm wide and heavy plate mills
Rate is not less than 40%, rolls the rear steel plate stacking slow cooling, and steel plate slow cooling start temperature is 500~850 DEG C, and slow cooling end temp is
≤100℃；
(5) it is heat-treated：Quenching+tempering, hardening heat are 915~935 DEG C；Temperature be 200~250 DEG C, steel plate with
Stove is cooled to 50~90 DEG C, immediately offline Length-fixing cutting.
Elemental gas content in microalloy element and steel is devised due to scientific and reasonable in the present invention, in conjunction with original
Heat treatment method make 30-100mm thickness steel plates with Brinell hardness HBW330~HBW600 grades of surface, tensile strength >=
Ensure that there is anti-hydrogen-induced delayed cracking ability while the high strength and high hardness of 1100MPa.
The difference of the present invention and the prior art is mainly reflected in following several respects：
It is easy to operate from production technology, without increase special procedure, especially steel plate after tempering using with
Furnace cooling but ensures that the hydrogen in steel effectively overflows, and has creation and novelty.
From properties of product, wear-resisting steel plate of the present invention have Brinell hardness HBW330~HBW600 grades of surface,
While the high intensity of tensile strength >=1100MPa, high rigidity, especially have devised 30-100mm steel plates have it is good anti-
Hydrogen-induced delayed cracking ability solves the quality of the long-standing think gauge of abrasion-resistant stee in the industry, high rigidity series easily hydrogen induced cracking (HIC)
Problem.
The thick anti-hydrogen-induced delayed cracking wear-resisting steel plates of 30-100mm of the present invention have obvious advantage.In control steel
On the basis of intralamellar part quality, in conjunction with the original heat treatment process of science, invent with research and development low cost, excellent performance, technique
Simple abrasion-resistant stee is the inexorable trend of social economy and development of iron & steel industry.
Specific implementation mode
Any feature is disclosed to obtain in this specification, it unless specifically stated, can be equivalent or with similar purpose by other
Alternative features are replaced.Unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.It is described to understand the present invention just for the sake of help, it should not be considered as the concrete restriction to the present invention.
Following embodiment is described in further detail present disclosure, and protection scope of the present invention includes but unlimited
In following embodiments.
Embodiment 1
1, a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the chemical composition mass percentage content of wherein steel are：C
0.09%, Si 0.20%, Mn 1.10%, Cr 0.40%, Mo 0.15%, Ni 0.12%, Ti 0.022%, P
0.010%, S 0.0015%, B 0.0018%, Al 0.019%, Ca 0.0030%, H 0.00011%, O 0.0020%, N
0.0025%, wherein Ca/S=2, surplus are Fe and inevitable impurity.
2, the preparation method of above-mentioned a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate includes smelting successively, cast, slab adds
Heat, roughing, finish rolling, heat treatment procedure：
(1) smelting procedure：It smelts：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.0018%, phosphorus control exists
0.110%, converter smelting, refining, vacuum degassing furnace are vacuum-treated；
(2) casting process：Continuous casting is carried out using conticaster, using whole argon gas protective casting, the control of the continuous casting degree of superheat exists
19 DEG C, Inner Quality of Billet is ensured using soft reduction technique.
(3) heating of plate blank：Slab charging temperature be 260 DEG C, heating of plate blank rate be 8min/cm, slab center portion and up and down
The temperature difference on surface is controlled at 10 DEG C, is rolled after heating；
(4) rolling process：Roughing is completed using 4300mm wide and heavy plate mills and finish rolling two-phase control rolling, intermediate base are
90mm, trimmed size 30mm, finish rolling stage add up reduction ratio 66.67%, roll the rear steel plate stacking slow cooling, and steel plate slow cooling starts
Temperature is 800 DEG C, and slow cooling end temp is 90 DEG C；
(5) heat treatment procedure：Hardening heat is 918 DEG C；Temperature is 215 DEG C, and steel plate cools to 61 with the furnace in stove
DEG C, immediately offline Length-fixing cutting.
3, through above-mentioned operation, 30mm thickness wear-resisting steel plates are obtained, the surface Brinell hardness of the wear-resisting steel plate is 344HBW, is resisted
Tensile strength is 1125MPa, and hydrogen-induced delayed cracking rate is 0 to steel plate after manufacture cutting and during use, has good resistant to hydrogen
Cause delayed fracture ability.
Embodiment 2
1, a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the chemical composition mass percentage content of wherein steel are：C
0.16%, Si 0.42%, Mn 0.95%, Cr 0.68%, Mo 0.28%, Ni 0.38%, Ti 0.025%, Nb
0.022%, P 0.008%, S 0.001%, B 0.0015%, Al 0.025%, Ca 0.0035%, H 0.00010%, O
0.0020%, N 0.0030%, wherein Ca/S=3.5, surplus are Fe and inevitable impurity.
2, the preparation method of above-mentioned a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate includes smelting successively, cast, slab adds
Heat, roughing, finish rolling, heat treatment procedure：
(1) smelting procedure：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.0015%, phosphorus control is 0.10%, converter
It smelts, refining, vacuum degassing furnace are vacuum-treated；
(2) casting process：Continuous casting is carried out using conticaster, using whole argon gas protective casting, the control of the continuous casting degree of superheat exists
18 DEG C, Inner Quality of Billet is ensured using soft reduction technique.
(3) heating of plate blank：Slab charging temperature be 310 DEG C, heating of plate blank rate be 9min/cm, slab center portion and up and down
The temperature difference on surface is controlled at 15 DEG C, is rolled after heating；
(4) it rolls：Roughing and finish rolling two-phase control rolling are completed using 4300mm wide and heavy plate mills, intermediate base is 170mm, at
Product specification 100mm, finish rolling stage add up reduction ratio 41.17%, and steel plate slow cooling start temperature is 795 DEG C, and slow cooling end temp is
88℃；
(5) it is heat-treated：Hardening heat is 934 DEG C；Temperature is 230 DEG C, and steel plate cools to 70 DEG C with the furnace in stove, with
Offline Length-fixing cutting immediately afterwards.
3, through above-mentioned operation, 100mm thickness wear-resisting steel plates are obtained, the surface Brinell hardness of the wear-resisting steel plate is 425HBW,
Tensile strength is 1380MPa, has good anti-hydrogen-induced delayed cracking ability.
Embodiment 3
1, a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the chemical composition mass percentage content of wherein steel are：C
0.21%, Si 0.42%, Mn 0.88%, Cr 0.47%, Mo 0.24%, Ni 0.22%, Ti 0.018%, P
0.010%, S 0.001%, B 0.0017%, Al 0.048%, Ca 0.0028%, H 0.00012%, O 0.0020%, N
0.0027%, wherein Ca/S=2.8, surplus are Fe and inevitable impurity.
2, the preparation method of above-mentioned a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate includes smelting successively, cast, slab adds
Heat, roughing, finish rolling, heat treatment procedure：
(1) smelting procedure：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.0019%, phosphorus control is 0.11%, converter
It smelts, refining, vacuum degassing furnace are vacuum-treated；
(2) casting process：Continuous casting is carried out using conticaster, using whole argon gas protective casting, the control of the continuous casting degree of superheat exists
18 DEG C, Inner Quality of Billet is ensured using soft reduction technique.
(3) heating of plate blank process：Slab charging temperature is 386 DEG C, and heating of plate blank rate is 9.5min/cm, slab center portion
It controls at 9 DEG C with the temperature difference of upper and lower surface, is rolled after heating；
(4) it rolls：Roughing and finish rolling two-phase control rolling are completed using 4300mm wide and heavy plate mills, intermediate base is 150mm, at
Product specification 60mm, finish rolling stage add up reduction ratio 60%, and steel plate slow cooling start temperature is 805 DEG C, and slow cooling end temp is 75 DEG C；
(5) it is heat-treated：Hardening heat is 922 DEG C；Temperature is 235 DEG C, and steel plate cools to 89 DEG C with the furnace, immediately
Offline Length-fixing cutting.
3, through above-mentioned operation, 60mm thickness wear-resisting steel plates are obtained, the surface Brinell hardness of the wear-resisting steel plate is 466HBW, is resisted
Tensile strength is 1495MPa, and hydrogen-induced delayed cracking rate is 0 to steel plate after manufacture cutting and during use, has good resistant to hydrogen
Cause delayed fracture ability.
Embodiment 4
1, a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the chemical composition mass percentage content of wherein steel are：C
0.30%, Si 0.28%, Mn 0.50%, Cr 0.89%, Mo 0.26%, Ni 0.30%, Ti 0.026%, Nb
0.015%, P 0.007%, S 0.0012%, B 0.0015%, Al 0.018%, Ca 0.0031%, H 0.00011%, O
0.0024%, N 0.0029%, wherein Ca/S=2.6, surplus are Fe and inevitable impurity.
2, the preparation method of above-mentioned a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate includes smelting successively, cast, slab adds
Heat, roughing, finish rolling, heat treatment procedure：
(1) smelting procedure：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.0018%, phosphorus control is 0.10%, converter
It smelts, refining, vacuum degassing furnace are vacuum-treated；
(2) casting process：Continuous casting is carried out using conticaster, using whole argon gas protective casting, the control of the continuous casting degree of superheat exists
17 DEG C, Inner Quality of Billet is ensured using soft reduction technique.
(3) heating of plate blank process：Slab charging temperature is 391 DEG C, and heating of plate blank rate is 9.8min/cm, slab center portion
It controls at 11 DEG C with the temperature difference of upper and lower surface, is rolled after heating；
(4) it rolls：Roughing and finish rolling two-phase control rolling are completed using 4300mm wide and heavy plate mills, intermediate base is 144mm, at
Product specification 80mm, finish rolling stage add up reduction ratio 44.44%, and steel plate slow cooling start temperature is 799 DEG C, and slow cooling end temp is 80
℃；
(5) it is heat-treated：Hardening heat is 931 DEG C；Temperature is 225 DEG C, and steel plate cools to 77 DEG C with the furnace, immediately
Offline Length-fixing cutting.
3, through above-mentioned operation, 80mm thickness wear-resisting steel plates are obtained, the surface Brinell hardness of the wear-resisting steel plate is 525HBW, is resisted
Tensile strength is 1710MPa, and hydrogen-induced delayed cracking rate is 0 to steel plate after manufacture cutting and during use, has good resistant to hydrogen
Cause delayed fracture ability.
Embodiment 5
1, a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, the chemical composition mass percentage content of wherein steel are：C
0.29%, Si 0.33%, Mn 0.51%, Cr 1.00%, Mo 0.38%, Ni 0.42%, Ti 0.029%, Nb
0.011%, P 0.010%, S 0.001%, B 0.0011%, Al 0.027%, Ca 0.0029%, H 0.00010%, O
0.0019%, N 0.0028%, wherein Ca/S=2.9, surplus are Fe and inevitable impurity.
2, the preparation method of above-mentioned a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate includes smelting successively, cast, slab adds
Heat, roughing, finish rolling, heat treatment procedure：
(1) smelting procedure：By molten steel through desulfurization, enter the control of stove molten iron sulphur 0.0017%, phosphorus control turns 0.111%
Stove is smelted, and refining, vacuum degassing furnace are vacuum-treated；
(2) casting process：Continuous casting is carried out using conticaster, using whole argon gas protective casting, the control of the continuous casting degree of superheat exists
19 DEG C, Inner Quality of Billet is ensured using soft reduction technique.
(3) heating of plate blank process：Slab charging temperature be 357 DEG C, heating of plate blank rate be 10min/cm, slab center portion and
The temperature difference of upper and lower surface is controlled at 10 DEG C, is rolled after heating；
(4) it rolls：Roughing and finish rolling two-phase control rolling are completed using 4300mm wide and heavy plate mills, intermediate base is 120mm, at
Product specification 40mm, finish rolling stage add up reduction ratio 66.67%, and steel plate slow cooling start temperature is 781 DEG C, and slow cooling end temp is 75
℃；
(5) it is heat-treated：Hardening heat is 928 DEG C；Temperature is 211 DEG C, and steel plate cools to 79 DEG C with the furnace, immediately
Offline Length-fixing cutting.
3, through above-mentioned operation, 40mm thickness wear-resisting steel plates are obtained, the surface Brinell hardness of the wear-resisting steel plate is 595HBW, is resisted
Tensile strength is 1850MPa, and hydrogen-induced delayed cracking rate is 0 to steel plate after manufacture cutting and during use, has good resistant to hydrogen
Cause delayed fracture ability.
It can be seen that according to present component design, rolling mill practice and Re Chu by embodiment 1-5 and corresponding testing result
The 30-100mm thickness steel plates that reason technological requirement is produced are with Brinell hardness HBW330~HBW600 grades of surface, tensile strength
Ensure that there is anti-hydrogen-induced delayed cracking ability while the high strength and high hardness of >=1100MPa, better meets user's validity period
Hope, the product prepared by production technology using the present invention has filled up domestic blank, therefore, wear-resisting steel plate of the invention have compared with
Apparent advantage.
Technological parameter (such as temperature, time) the section bound value and interval value of the present invention can realize this law,
Embodiment numerous to list herein.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Right in.
Claims (8)
1. a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate, which is characterized in that the chemical composition and its weight hundred of the wear-resisting steel plate
Point content is：C 0.08~0.30%, Si 0.10~0.50%, Mn 0.5~1.20%, Cr 0.15~1.00%, Mo
0.10~0.40%, Ni 0.05~0.50%, Ti 0.010~0.050%, Nb 0~0.030%, P≤0.010%, S≤
0.002%, B 0.0010~0.0035%, Al 0.01~0.050%, Ca 0.0020~0.0040%, H≤0.00015%,
O≤0.0025%, N≤0.0030%, wherein Ca/S=2~4, surplus are Fe and inevitable impurity.
2. a kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate according to claim 1, which is characterized in that the surface Bu Shi of steel plate
HBW330~HBW600 grades of hardness, tensile strength >=1100MPa, thickness specification 30-100mm.
3. a kind of preparation method of anti-hydrogen-induced delayed cracking wear-resisting steel plate described in claims 1 or 2, the method includes following steps
Suddenly：
1) it smelts：By molten steel through desulfurization, converter smelting, refining, vacuum degassing furnace are vacuum-treated；
2) it casts：By step 1) treated molten steel send conticaster, continuous casting is using whole argon gas protective casting；
3) heating of plate blank：It is rolled after heating；
4) it rolls：Roughing and finish rolling two-phase control rolling；
5) it is heat-treated：Quenching+tempering.
4. preparation method according to claim 3, which is characterized in that in the step 1), enter the control of stove molten iron sulphur and exist
0.002% hereinafter, phosphorus controls below 0.12%.
5. preparation method according to claim 3, which is characterized in that in the step 2), the continuous casting degree of superheat is controlled not
More than 20 DEG C.
6. preparation method according to claim 3, which is characterized in that in the step 3), slab charging temperature be 200~
400 DEG C, heating of plate blank rate is 8~10min/cm, and the temperature difference control of slab center portion and upper and lower surface is within ± 15 DEG C.
7. preparation method according to claim 3, which is characterized in that in the step 4), the finish rolling stage adds up reduction ratio
Not less than 40%, the rear steel plate stacking slow cooling is rolled, steel plate slow cooling start temperature is 500~850 DEG C, slow cooling end temp is≤
100℃。
8. preparation method according to claim 3, which is characterized in that in the step 5), hardening heat is 915~935
℃；Temperature is 200~250 DEG C, and steel plate cools to 50~90 DEG C with the furnace, immediately offline Length-fixing cutting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560758.9A CN108707824A (en) | 2018-05-25 | 2018-05-25 | A kind of anti-hydrogen-induced delayed cracking wear-resisting steel plate and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111549300A (en) * | 2020-05-08 | 2020-08-18 | 包头钢铁（集团）有限责任公司 | Steel with yield strength of 800MPa for engineering machinery and preparation method thereof |
| CN114737128A (en) * | 2022-04-21 | 2022-07-12 | 南京钢铁股份有限公司 | NM 300-grade wear-resistant steel and production method thereof |
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Application publication date: 20181026 |