CN107012393B - The production method of carbon chromium steel in a kind of low cost high-hardenability - Google Patents
The production method of carbon chromium steel in a kind of low cost high-hardenability Download PDFInfo
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- CN107012393B CN107012393B CN201710402346.8A CN201710402346A CN107012393B CN 107012393 B CN107012393 B CN 107012393B CN 201710402346 A CN201710402346 A CN 201710402346A CN 107012393 B CN107012393 B CN 107012393B
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- hardenability
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- carbon chromium
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 22
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 238000007670 refining Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000009749 continuous casting Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000007664 blowing Methods 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 11
- 238000001291 vacuum drying Methods 0.000 claims abstract description 10
- 238000007872 degassing Methods 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 58
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 238000010079 rubber tapping Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 23
- 229910052786 argon Inorganic materials 0.000 claims description 22
- 238000005516 engineering process Methods 0.000 claims description 22
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 16
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 244000309464 bull Species 0.000 claims description 14
- 230000009977 dual effect Effects 0.000 claims description 14
- 238000002791 soaking Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000009628 steelmaking Methods 0.000 claims description 8
- 229910004709 CaSi Inorganic materials 0.000 claims description 7
- 239000005997 Calcium carbide Substances 0.000 claims description 7
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 7
- 241000522169 Lespedeza Species 0.000 claims description 7
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229910000805 Pig iron Inorganic materials 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 7
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 230000009514 concussion Effects 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000011282 treatment Methods 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 239000010436 fluorite Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 239000002585 base Substances 0.000 claims 1
- 239000003643 water by type Substances 0.000 claims 1
- 238000010791 quenching Methods 0.000 abstract description 15
- 230000000171 quenching effect Effects 0.000 abstract description 15
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 8
- 238000005204 segregation Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010583 slow cooling Methods 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 238000007792 addition Methods 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 5
- 238000005266 casting Methods 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 5
- 229910000514 dolomite Inorganic materials 0.000 description 5
- 239000010903 husk Substances 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：The just refining of top and bottom complex blowing basic bessemer converter, LF refining furnace refining, the degassing of VD vacuum drying ovens, circular-arc type continuous casting machine continuous casting, steel rolling heating, combination dephosphorization, rolling, stacking.The invention reside in the design concept using fine setting Mo+V to improve quenching degree, obtains good tempered sorbite tissue, meets high-end bent axle steel quality demand, opens up new footpath and successfully solves the problems, such as that 40Cr quenching degree is insufficient and 42CrMoA production costs are high.
Description
Technical field
The present invention relates to a kind of production method of carbon chromium steel in steelmaking technical field, more particularly to inexpensive high-hardenability.
Background technology
Bent axle is most important component in engine.It bears the power that connecting rod transmits, and is transformed into torque and passes through song
Axis exports and drives other annexes on engine to work.Bent axle is subject to the gas inertia of the centrifugal force of gyrating mass, mechanical periodicity
The collective effect of power and reciprocal inertia force, makes bent axle bear the effect of flexion torsion load.Therefore it is required that bent axle have it is enough strong
Degree and rigidity, journal surface need are wear-resisting, work is uniform, balance is good.Current quenched class bent axle mainly has 40Cr and 42CrMo, this
Two kinds of products have different user groups, but are the absence of a kind of product that both are mutually linked.
With continuously improving, it is necessary to constantly segmented to the performance of steel for automobile engine, with meet cost and
Equilibrium relation between performance.
Therefore, a kind of production method of carbon chromium steel in new inexpensive high-hardenability is developed, not only with urgent research
Value, it may have good economic benefit and commercial application potentiality, this is exactly where the power that the present invention is accomplished and basis.
The content of the invention
The defects of in order to overcome the prior art as indicated above, the present inventor has made intensive studies this, is paying
After a large amount of creative works, so as to complete the present invention.
Specifically, the technical problems to be solved by the invention are：Carbon chromium steel in a kind of inexpensive high-hardenability is provided
Production method.
In order to solve the above technical problems, the technical scheme is that：
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：At the beginning of top and bottom complex blowing basic bessemer converter
Refining, LF refining furnace refining, the degassing of VD vacuum drying ovens, circular-arc type continuous casting machine continuous casting, steel rolling heating, combination dephosphorization, rolling, stacking.
In the present invention, as a kind of perferred technical scheme, the concrete technology that top and bottom complex blowing basic bessemer converter just refines is：With
The high-quality molten iron of 72t is main material, and is equipped with 5~8t pig iron composition steel-making primary raw material, and liquid iron charging ratio reaches 80%, blowing
During use " double slags " method dephosphorization, tapping control C content wt >=0.08%, P content wt≤0.010% of tapping, tapping 15~
Adding SiCaBaAl 1.0kg/t, steel-core-aluminium 2.0kg/t strong deoxidations during 20t, iron alloy material, carburant, slag charge are then added in bag,
The tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float.
Slag charge uses the mixture of hearthstone ash, pro-molten refining slag and stove fluorite,
Iron alloy material includes fero-manganesesilicon, ferrochrome, nickel plate and molybdenum-iron,
In the present invention, as a kind of perferred technical scheme, the concrete technology of the LF refining furnace refining is：Before refining furnace
Phase calcium carbide and carborundum diffusive deoxidation, form stablize white slag as early as possible, and the dual alkalinity R of white slag is controlled 4.0~6.0；LF essences
Refine finishing slag dual alkalinity R2 >=3.5.
Design of Chemical Composition target：C, Si contents wt is controlled by 0.39~0.41%, 0.23~0.27% lower limit respectively；
Mn, Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.010~
0.025%；Al content wt：0.010~0.020%.
It is described refining finishing slag chemical composition wt% be：CaO 50~65%, SiO27~15%, MgO 0.4~
1.2%, Al2O325~30%, S 0.3~0.5%, FeO≤0.50%.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the VD vacuum drying ovens degassing is：1650 ±
10 DEG C, vacuum be less than 67Pa under keep more than 15min carry out VD Fruit storages, after treatment feed 1.5~2.0m/
Molten steel is denatured for t CaSi core-spun yarns and 1.5m/t sulphur lines and Sization processing, argon gas 6~12min of soft stirring before bull ladle, bull ladle
1560 ± 15 DEG C of temperature.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the circular-arc type continuous casting machine continuous casting is：Big bag length
The mouth of a river uses Ar seal apparatus, and whole blowing argon is flowed to big Baogang, and the degree of superheat selects 260mm × 300mm rectangles at 25~40 DEG C
Carbon mould flux in base, 0.54 ± 0.04m/min of pulling rate, conticaster use M-EMS 3Hz/400A.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the steel rolling heating is：Using steel-pushing type plus
Hot stove, using I section of temperature control of heating at 1050-1070 DEG C, II section of temperature control of heating is at 1190-1210 DEG C, soaking zone temperature
Degree control is at 1200-1220 DEG C, when II section of heating and soaking zone heating time ＞ 4 are small, heating process when heating >=6 is small altogether
Ensure the uniform diffusion of steel.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the combination dephosphorization is：Using 260mm ×
300mm square type base combined type phosphorus removing methods, using 18-22MPa high-pressure water descalings, overturn concussion surface oxidation iron three times before cogging
Skin, is aided with installation cuneate lespedeza de-scaling device on rollgang.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the milling step is：With 260mm ×
300mm square types base is raw material base, after the middle square billet that 160 × 160mm is produced using Φ 650mm blooming mills, is rolled into Φ 87mm
Steel.
In the present invention, as a kind of perferred technical scheme, the concrete technology of the stacking step is：Using 350 DEG C of ＞
Lee concentrates stacking slow cooling mode, further goes de-stress.
The component of conventional 40Cr is adjusted in the present invention, to meet 40Cr quenching degree deficiency problems.Emphasis is chemically
Component and the aspect exploitation design of heating rolling technique two, tempered sorbite+lack be organized as apart from steel surface 15mm at
Measure strip and granular ferrite.The characteristics of 40CrMoV round steel is good with quenching degree, and fatigue life is high.And the present invention
40CrMoV is exactly linking product between the two.With than 40Cr preferably quenching degree, meet at steel surface 15mm still
The performance of right through hardening, obtains good tempered sorbite tissue, the successful research and development of low-cost and high-quality 40CrMoV, improve product
The market competitiveness.
In the present invention, Cr elements belong to the element for reducing austenite phase field, can dramatically increase the quenching degree of steel, formation
Complicated carbide can dramatically increase the wearability of steel.Mo elements belong to the element for reducing austenite phase field, for quenching for increase steel
Permeability element.When Mo contents are relatively low, the cementite met is formed with iron and carbon, improves the quenching degree of steel.When there is Cr in steel
When, (Mo, Fe) 23C6 will be preferentially formed, in this carbide, Cr and V can be dissolved, and the only V ability of solid solution condition
Increase the quenching degree of steel.V element belongs to strong carbide and is formed, and can reduce austenite phase field, in V ＜ 0.05%, will promote
Into Austenite Grain Growth.Austenite grain is bigger, and crystal boundary section can be higher, and quenching degree is improved and advantageously promotes effect.
In conclusion the present invention has the advantages that：
Compared with prior art, the present invention there is following obvious advantage：
First, the essential element such as C, Si, Mn, Cr, Mo, V in steel carries out strengthening quenching degree design, controls relatively usually narrower
In the range of, steel uniformity is good and properties of product fluctuation range reduces.
2nd, the present invention uses double slag operation of converter, and refining furnace makes high basicity slag, realizes low P and low S controls.And use
VD vacuum outgas and argon for protecting pouring, are controlled the impurity contents such as H, O, N, so as to reduce nonmetallic inclusionsin steel
Quantity, makes its fine dispersion, improves the low temperature ductile-brittle transition temperature of steel.
3rd, the present invention is effectively improved steel using electromagnetic agitating technology and is caused using the continuous casting billet of continuous casting process production
Density and component segregation.
4th, the invention reside in the design concept using fine setting Mo+V to improve quenching degree, obtains good tempered sorbite
Tissue, meet high-end bent axle steel quality demand, open up new footpath successfully solve 40Cr quenching degree deficiency and 42CrMoA production costs
High problem.
Brief description of the drawings
Fig. 1 is the metallograph after 40CrMoV steel heat treatments；
Fig. 2 is the metallograph after 40Cr steel heat treatments；
Fig. 3 is the metallograph after 42CrMoA steel heat treatments；
Fig. 4 is the metallograph of standard qualification rank steel.
Embodiment
With reference to specific embodiment, the present invention is further described.But the purposes and mesh of these exemplary embodiments
Be only used for enumerate the present invention, any type of any restriction not is formed to the real protection scope of the present invention, it is more non-to incite somebody to action this
The protection domain of invention is confined to this.
Embodiment 1
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：
Top and bottom complex blowing basic bessemer converter just refines：Using the high-quality molten iron of 72t as main material, and the steel-making of 5t pig iron composition is equipped with mainly
Raw material, liquid iron charging ratio reach 80%, take the circumstances into consideration the additions such as adjustment lime, dolomite, ore in converting process, using " double slags "
Method dephosphorization, it is 0.08% that tapping, which controls C content wt, and tapping P content wt is 0.010%, slag-stopping tapping；Add during tapping 15t
SiCaBaAl 1.0kg/t, the strong deoxidations of steel-core-aluminium 2.0kg/t, iron alloy material (iron alloy material include fero-manganesesilicon, ferrochrome, nickel plate and
Molybdenum-iron), carburant, slag charge (slag charge using 300kg/ stoves hearthstone ash, 500kg/ stoves pro-molten refining slag and 100kg/ stove fluorites it is mixed
Compound) then add in bag, the tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float；
LF refining furnace refines：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag as early as possible, white slag
Dual alkalinity R is controlled 4.0；Design of Chemical Composition target：C, Si contents wt presses 0.39% respectively, the control of 0.23% lower limit；Mn、
Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.010%；Al content
wt：0.010%, surplus Fe.LF refining finishing slag dual alkalinity R2 is 3.5；It is described refining finishing slag chemical composition wt% be：
CaO 50%, SiO27%, MgO 0.4%, Al2O325%, S 0.3%, FeO 0.50%, surplus are inevitable for other
Impurity；
VD vacuum drying ovens deaerate：15min is kept to carry out VD Fruit storages, processing knot under 1640 DEG C, vacuum 67Pa
1.5m/t CaSi core-spun yarns are fed after beam and molten steel is denatured 1.5m/t sulphur lines and Sization processing, while add charring rice husk
The protection for carrying out molten steel covers, the soft stirring 6min of argon gas before bull ladle, 1545 DEG C of bull ladle temperature；
Circular-arc type continuous casting machine continuous casting is poured into a mould using full guard：Big bag long nozzle uses Ar seal apparatus, and big Baogang stream whole process is blown
Argon is protected, and the degree of superheat selects carbon mould flux in 260mm × 300mm rectangular blooms, pulling rate 0.50m/min, conticaster at 25 DEG C
Using M-EMS, crystallizer electric current：400A, frequency：3Hz, electromagnetic agitating technology reduce casting blank solidification segregation tendency；
Steel rolling is heated：Using pusher-type furnace, using I section of temperature control of heating at 1050 DEG C, II section of temperature control is heated
System is at 1190 DEG C, and soaking zone temperature control is at 1200 DEG C, when II section of heating and soaking zone heating time ＞ 4 are small, heats >=6 altogether
The heating process of hour ensures the uniform diffusion of steel；
Combine dephosphorization：Using 260mm × 300mm square type base combined type phosphorus removing methods, using 18MPa high-pressure water descalings, open
Concussion scale on surface is overturned before base three times, is aided with installation cuneate lespedeza de-scaling device on rollgang；
Rolling：Using 260mm × 300mm square types base as raw material base, produced using Φ 650mm blooming mills in 160 × 160mm
Between after square billet, be rolled into Φ 87mm steel；
Stacking：Stacking slow cooling mode is concentrated using 350 DEG C of lees of ＞, further goes de-stress.
Embodiment 2
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：
Top and bottom complex blowing basic bessemer converter just refines：Using the high-quality molten iron of 72t as main material, and the steel-making of 5t pig iron composition is equipped with mainly
Raw material, liquid iron charging ratio reach 80%, take the circumstances into consideration the additions such as adjustment lime, dolomite, ore in converting process, using " double slags "
Method dephosphorization, tapping control C content wt0.10%, tap P content wt0.009%, slag-stopping tapping；Add SiCaBaAl during tapping 15t
1.0kg/t, the strong deoxidations of steel-core-aluminium 2.0kg/t, iron alloy material (iron alloy material includes fero-manganesesilicon, ferrochrome, nickel plate and molybdenum-iron), carburetting
Agent, slag charge (slag charge uses the mixture of 300kg/ stoves hearthstone ash, 500kg/ stoves pro-molten refining slag and 100kg/ stove fluorites) are then
Add in bag, the tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float；
LF refining furnace refines：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag as early as possible, white slag
Dual alkalinity R is controlled 6.0；Design of Chemical Composition target：C, Si contents wt presses 0.41% respectively, the control of 0.27% lower limit；Mn、
Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.025%；Al content
wt：0.020%, surplus is Fe and inevitable impurity.LF refining finishing slag dual alkalinity R2 is 4；The refining finishing slag
Chemical composition wt% is：CaO 50%, SiO215%, MgO 1.2%, Al2O330%, S 0.5%, FeO≤0.50% are remaining
Measure as other inevitable impurity；
VD vacuum drying ovens deaerate：More than 15min is kept to carry out at VD vacuum outgas in the case where 1660 DEG C, vacuum are less than 67Pa
Molten steel is denatured for reason, after treatment feeding 2.0m/t CaSi core-spun yarns and 1.5m/t sulphur lines and Sization processing, add at the same time
Enter the protection covering that charring rice husk carries out molten steel, the soft stirring 12min of argon gas before bull ladle, 1575 DEG C of bull ladle temperature；
Circular-arc type continuous casting machine continuous casting is poured into a mould using full guard：Big bag long nozzle uses Ar seal apparatus, and big Baogang stream whole process is blown
Argon is protected, and the degree of superheat selects carbon mould flux in 260mm × 300mm rectangular blooms, pulling rate 0.58m/min, conticaster at 50 DEG C
Using M-EMS, crystallizer electric current：400A, frequency：3Hz, electromagnetic agitating technology reduce casting blank solidification segregation tendency；
Steel rolling is heated：Using pusher-type furnace, using I section of temperature control of heating at 1070 DEG C, II section of temperature control is heated
For system at 1210 DEG C, soaking zone temperature control when II section of heating and soaking zone heating time are 5 small, is heated to be 6 altogether at 1220 DEG C
The heating process of hour ensures the uniform diffusion of steel；
Combine dephosphorization：Using 260mm × 300mm square type base combined type phosphorus removing methods, using 22MPa high-pressure water descalings, open
Concussion scale on surface is overturned before base three times, is aided with installation cuneate lespedeza de-scaling device on rollgang；
Rolling：Using 260mm × 300mm square types base as raw material base, produced using Φ 650mm blooming mills in 160 × 160mm
Between after square billet, be rolled into Φ 87mm steel；
Stacking：Stacking slow cooling mode is concentrated using 350 DEG C of lees of ＞, further goes de-stress.
Embodiment 3
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：
Top and bottom complex blowing basic bessemer converter just refines：Using the high-quality molten iron of 72t as main material, and the steel-making of 5t pig iron composition is equipped with mainly
Raw material, liquid iron charging ratio reach 80%, take the circumstances into consideration the additions such as adjustment lime, dolomite, ore in converting process, using " double slags "
Method dephosphorization, it is 0.12% that tapping, which controls C content wt, and tapping P content wt is 0.008%, slag-stopping tapping；Add during tapping 18t
SiCaBaAl 1.0kg/t, the strong deoxidations of steel-core-aluminium 2.0kg/t, iron alloy material (iron alloy material include fero-manganesesilicon, ferrochrome, nickel plate and
Molybdenum-iron), carburant, slag charge (slag charge using 300kg/ stoves hearthstone ash, 500kg/ stoves pro-molten refining slag and 100kg/ stove fluorites it is mixed
Compound) then add in bag, the tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float；
LF refining furnace refines：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag as early as possible, white slag
Dual alkalinity R is controlled 4.8；Design of Chemical Composition target：C, Si contents wt presses 0.40% respectively, the control of 0.25% lower limit；Mn、
Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.020%；Al content
wt：0.015%.LF refining finishing slag dual alkalinity R2 is 4.5；It is described refining finishing slag chemical composition wt% be：CaO
58.02%, SiO212.89%, MgO 0.38%, Al2O328.12%, S 0.39%, FeO 0.2%；
VD vacuum drying ovens deaerate：20min is kept to carry out VD Fruit storages, processing knot under 1650 DEG C, vacuum 65Pa
1.8m/t CaSi core-spun yarns are fed after beam and molten steel is denatured 1.5m/t sulphur lines and Sization processing, while add charring rice husk
The protection for carrying out molten steel covers, the soft stirring 9min of argon gas before bull ladle, 1560 DEG C of bull ladle temperature；
Circular-arc type continuous casting machine continuous casting is poured into a mould using full guard：Big bag long nozzle uses Ar seal apparatus, and big Baogang stream whole process is blown
Argon is protected, and the degree of superheat selects carbon mould flux in 260mm × 300mm rectangular blooms, pulling rate 0.54m/min, conticaster at 35 DEG C
Using M-EMS, crystallizer electric current：400A, frequency：3Hz, electromagnetic agitating technology reduce casting blank solidification segregation tendency；
Steel rolling is heated：Using pusher-type furnace, using I section of temperature control of heating at 1060 DEG C, II section of temperature control is heated
For system at 1200 DEG C, soaking zone temperature control when II section of heating and soaking zone heating time are 6 small, is heated to be 7 altogether at 1210 DEG C
The heating process of hour ensures the uniform diffusion of steel；
Combine dephosphorization：Using 260mm × 300mm square type base combined type phosphorus removing methods, using 20MPa high-pressure water descalings, open
Concussion scale on surface is overturned before base three times, is aided with installation cuneate lespedeza de-scaling device on rollgang；
Rolling：Using 260mm × 300mm square types base as raw material base, produced using Φ 650mm blooming mills in 160 × 160mm
Between after square billet, be rolled into Φ 87mm steel；
Stacking：Stacking slow cooling mode is concentrated using 350 DEG C of lees of ＞, further goes de-stress.
Embodiment 4
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：
Top and bottom complex blowing basic bessemer converter just refines：Using the high-quality molten iron of 72t as main material, and the steel-making of 5t pig iron composition is equipped with mainly
Raw material, liquid iron charging ratio reach 80%, take the circumstances into consideration the additions such as adjustment lime, dolomite, ore in converting process, using " double slags "
Method dephosphorization, tapping control C content wt >=0.08%, P content wt≤0.010% of tapping, slag-stopping tapping；Add during tapping 20t
SiCaBaAl 1.0kg/t, the strong deoxidations of steel-core-aluminium 2.0kg/t, iron alloy material (iron alloy material include fero-manganesesilicon, ferrochrome, nickel plate and
Molybdenum-iron), carburant, slag charge (slag charge using 300kg/ stoves hearthstone ash, 500kg/ stoves pro-molten refining slag and 100kg/ stove fluorites it is mixed
Compound) then add in bag, the tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float；
LF refining furnace refines：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag as early as possible, white slag
Dual alkalinity R is controlled 5；Design of Chemical Composition target：C, Si contents wt presses 0.39% respectively, the control of 0.27% lower limit；Mn、
Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.015%；Al content
wt：0.012%, surplus Fe.LF refining finishing slag dual alkalinity R2 is 4.5；It is described refining finishing slag chemical composition wt% be：
CaO 51%, SiO28%, MgO 0.6%, Al2O325%, S 0.4%, FeO≤0.50%, surplus are inevitably miscellaneous
Matter；
VD vacuum drying ovens deaerate：More than 15min is kept to carry out at VD vacuum outgas in the case where 1655 DEG C, vacuum are less than 67Pa
Molten steel is denatured for reason, after treatment feeding 1.7m/t CaSi core-spun yarns and 1.5m/t sulphur lines and Sization processing, add at the same time
Enter the protection covering that charring rice husk carries out molten steel, the soft stirring 10min of argon gas before bull ladle, 1565 DEG C of bull ladle temperature；
Circular-arc type continuous casting machine continuous casting is poured into a mould using full guard：Big bag long nozzle uses Ar seal apparatus, and big Baogang stream whole process is blown
Argon is protected, and the degree of superheat selects carbon mould flux in 260mm × 300mm rectangular blooms, pulling rate 0.55m/min, conticaster at 35 DEG C
Using M-EMS, crystallizer electric current：400A, frequency：3Hz, electromagnetic agitating technology reduce casting blank solidification segregation tendency；
Steel rolling is heated：Using pusher-type furnace, using I section of temperature control of heating at 1055 DEG C, II section of temperature control is heated
At 1200 DEG C, soaking zone temperature control when II section of heating and soaking zone heating time are 4.5 small, heats system altogether at 1220 DEG C
Ensure the uniform diffusion of steel for 6 heating process when small；
Combine dephosphorization：Using 260mm × 300mm square type base combined type phosphorus removing methods, using 19MPa high-pressure water descalings, open
Concussion scale on surface is overturned before base three times, is aided with installation cuneate lespedeza de-scaling device on rollgang；
Rolling：Using 260mm × 300mm square types base as raw material base, produced using Φ 650mm blooming mills in 160 × 160mm
Between after square billet, be rolled into Φ 87mm steel；
Stacking：Stacking slow cooling mode is concentrated using 350 DEG C of lees of ＞, further goes de-stress.
Embodiment 5
The production method of carbon chromium steel, includes the following steps in a kind of low cost high-hardenability：
Top and bottom complex blowing basic bessemer converter just refines：Using the high-quality molten iron of 72t as main material, and the steel-making of 5t pig iron composition is equipped with mainly
Raw material, liquid iron charging ratio reach 80%, take the circumstances into consideration the additions such as adjustment lime, dolomite, ore in converting process, using " double slags "
Method dephosphorization, it is 0.08% that tapping, which controls C content wt, and tapping P content wt is 0.010%, slag-stopping tapping；Add during tapping 15t
SiCaBaAl 1.0kg/t, the strong deoxidations of steel-core-aluminium 2.0kg/t, iron alloy material (iron alloy material include fero-manganesesilicon, ferrochrome, nickel plate and
Molybdenum-iron), carburant, slag charge (slag charge using 300kg/ stoves hearthstone ash, 500kg/ stoves pro-molten refining slag and 100kg/ stove fluorites it is mixed
Compound) then add in bag, the tapping later stage uses argon gas strong mixing, with uniform temperature and component, and promotes deoxidation products to float；
LF refining furnace refines：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag as early as possible, white slag
Dual alkalinity R is controlled 5.5；Design of Chemical Composition target：C, Si contents wt presses 0.41% respectively, the control of 0.24% lower limit；Mn、
Cr, Mo, V content wt are controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.023%；Al content
wt：0.015%.LF refining finishing slag dual alkalinity R2 is 4；It is described refining finishing slag chemical composition wt% be：CaO 65%, SiO2
7%, MgO 0.4%, Al2O325%, S 0.5%, FeO≤0.50%, surplus are other impurities；
VD vacuum drying ovens deaerate：More than 15min is kept to carry out at VD vacuum outgas in the case where 1655 DEG C, vacuum are less than 67Pa
Molten steel is denatured for reason, after treatment feeding 1.8m/t CaSi core-spun yarns and 1.5m/t sulphur lines and Sization processing, add at the same time
Enter the protection covering that charring rice husk carries out molten steel, argon gas 6~12min of soft stirring before bull ladle, 1550 DEG C of bull ladle temperature；
Circular-arc type continuous casting machine continuous casting is poured into a mould using full guard：Big bag long nozzle uses Ar seal apparatus, and big Baogang stream whole process is blown
Argon is protected, and the degree of superheat selects carbon mould flux in 260mm × 300mm rectangular blooms, pulling rate 0.52m/min, conticaster at 45 DEG C
Using M-EMS, crystallizer electric current：400A, frequency：3Hz, electromagnetic agitating technology reduce casting blank solidification segregation tendency；
Steel rolling is heated：Using pusher-type furnace, using I section of temperature control of heating at 1065 DEG C, II section of temperature control is heated
For system at 1195 DEG C, soaking zone temperature control when II section of heating and soaking zone heating time are 5 small, is heated to be 7 altogether at 1210 DEG C
The heating process of hour ensures the uniform diffusion of steel；
Combine dephosphorization：Using 260mm × 300mm square type base combined type phosphorus removing methods, using 21MPa high-pressure water descalings, open
Concussion scale on surface is overturned before base three times, is aided with installation cuneate lespedeza de-scaling device on rollgang；
Rolling：Using 260mm × 300mm square types base as raw material base, produced using Φ 650mm blooming mills in 160 × 160mm
Between after square billet, be rolled into Φ 87mm steel；
Stacking：Stacking slow cooling mode is concentrated using 350 DEG C of lees of ＞, further goes de-stress.
Detect embodiment
Example 3 prepare inexpensive high-hardenability in carbon chromium steel (40CrMoV steel), according to 850 DEG C insulation 174min,
After 580 DEG C of insulation 261min of water quenching are quenched metallographic structure is obtained at the 15mm of surface.
Microscopic structure grading after table 1 is quenched
The macroscopic examination result for the 40CrMoV steel that table 2 obtains for the embodiment of the present invention 3
2 stocking macrostructure of table grades (level)
| The trade mark | General Loosen | Center porosity | General spot segregation | Edge spot segregation |
| 40CrMoV | 0/0.5 | 0.5/1.0 | Nothing | Nothing |
| 40Cr | 0.5/0.5 | 0.5/1.0 | Nothing | Nothing |
| 42CrMoA | 0/0.5 | 1.0/0.5 | Nothing | Nothing |
| Standard requirement | ≤2 | ≤2 | Nothing | Nothing |
The 40CrMoV steel and the Cost comparisons of remaining steel that table 3 obtains for the present embodiment 3：
| The trade mark | Cost |
| 40CrMoV | 2970 |
| 40Cr | 2900 |
| 42CrMoA | 3100 |
Table 4 is the 40CrMoV steel that the present embodiment 3 obtains with being contrasted with the quenching degree of remaining steel
It should be appreciated that the purposes of these embodiments is merely to illustrate the present invention and is not intended to the protection model of the limitation present invention
Enclose.In addition, it should also be understood that, after the technology contents of the present invention have been read, those skilled in the art can make the present invention each
Kind change, modification and/or variation, all these equivalent forms equally fall within the guarantor that the application the appended claims are limited
Within the scope of shield.
Claims (9)
- A kind of 1. production method of carbon chromium steel in low cost high-hardenability, it is characterised in that：Include the following steps：Top and bottom complex blowing alkali Property converter just refining, LF refining furnace refining, the degassing of VD vacuum drying ovens, circular-arc type continuous casting machine continuous casting, steel rolling heat, combine dephosphorization, rolling, heap Pile；The concrete technology of refining is at the beginning of top and bottom complex blowing basic bessemer converter：Using the high-quality molten iron of 72t as main material, and it is equipped with 5~8t pig iron composition Steel-making primary raw material, liquid iron charging ratio reach 80%, and " double slags " method dephosphorization, tapping control C content wt are used in converting process >=0.08%, tap P content wt≤0.010%, tap 15~20t when add SiCaBaAl 1.0kg/t, steel-core-aluminium 2.0kg/t strong Deoxidation, iron alloy material, carburant, slag charge are then added in bag, tapping the later stage use argon gas strong mixing, with uniform temperature and into Point, and promote deoxidation products to float.
- 2. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：Slag charge is adopted With the mixture of hearthstone ash, pro-molten refining slag and stove fluorite, iron alloy material includes fero-manganesesilicon, ferrochrome, nickel plate and molybdenum-iron.
- 3. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：The LF Refining furnace refining concrete technology be：Refining furnace calcium carbide early period and carborundum diffusive deoxidation, form stablize white slag, white slag as early as possible Dual alkalinity R control 4.0~6.0；LF refining finishing slag dual alkalinity R2 >=3.5.
- 4. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 3, it is characterised in that：Chemistry into Divide design object：C, Si contents wt is controlled by 0.39~0.41%, 0.23~0.27% lower limit respectively；Mn, Cr, Mo, V content wt Controlled by 0.78%, 1.08%, 0.06%, 0.04% desired value；S contents wt：0.010~0.025%；Al content wt：0.010 ~0.020%.
- 5. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 4, it is characterised in that：The essence Refining finishing slag chemical composition wt% be：CaO 50~65%, SiO27~15%, MgO 0.4~1.2%, Al2O325~ 30%, S 0.3~0.5%, FeO≤0.50%, surplus are other inevitable impurity.
- 6. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：The VD Vacuum drying oven degassing concrete technology be：Keep more than 15min to carry out VD vacuum in the case where 1650 ± 10 DEG C, vacuum are less than 67Pa to take off Gas disposal, after treatment feeds 1.5~2.0m/t CaSi core-spun yarns and molten steel is denatured 1.5m/t sulphur lines and Sization place Manage, argon gas 6~12min of soft stirring before bull ladle, 1560 ± 15 DEG C of bull ladle temperature.
- 7. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：The arc The concrete technology of shape conticaster continuous casting is：Big bag long nozzle uses Ar seal apparatus, and whole blowing argon, the degree of superheat are flowed to big Baogang At 25~40 DEG C, carbon mould flux in 260mm × 300mm rectangular blooms, 0.54 ± 0.04m/min of pulling rate are selected, conticaster is adopted With M-EMS 3Hz/400A.
- 8. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：It is described to roll Steel heating concrete technology be：Using pusher-type furnace, using I section of temperature control of heating at 1050-1070 DEG C, II section is heated Temperature control is at 1190-1210 DEG C, and soaking zone temperature control is at 1200-1220 DEG C, II section of heating and soaking zone heating time ＞ 4 Hour, heating process when heating >=6 is small altogether ensures the uniform diffusion of steel.
- 9. the production method of carbon chromium steel in a kind of inexpensive high-hardenability as claimed in claim 1, it is characterised in that：Described group Close dephosphorization concrete technology be：Using 260mm × 300mm square type base combined type phosphorus removing methods, removed using 18-22MPa high pressure waters Squama, overturns concussion scale on surface three times before cogging, be aided with installation cuneate lespedeza de-scaling device on rollgang.
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| CN107746911A (en) * | 2017-11-12 | 2018-03-02 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of remnant forging thermal quenching steel |
| CN109097651B (en) * | 2018-08-09 | 2019-06-28 | 徐州宏阳新材料科技有限公司 | A kind of low-phosphorous high carbon ferro-chrome and its smelting process |
| CN109112398B (en) * | 2018-08-29 | 2020-10-30 | 承德建龙特殊钢有限公司 | Chromium-containing alloy bar and preparation method thereof |
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Denomination of invention: A low-cost and high hardenability production method for medium carbon chromium steel Granted publication date: 20180515 Pledgee: Shandong Shouguang Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG SHOUGUANG JUNENG SPECIAL STEEL Co.,Ltd. Registration number: Y2024980019696 |