CN109735684A - A method of improving Tempered Steel Containing Sulphur castability and transverse impact toughness - Google Patents
A method of improving Tempered Steel Containing Sulphur castability and transverse impact toughness Download PDFInfo
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- CN109735684A CN109735684A CN201910122874.7A CN201910122874A CN109735684A CN 109735684 A CN109735684 A CN 109735684A CN 201910122874 A CN201910122874 A CN 201910122874A CN 109735684 A CN109735684 A CN 109735684A
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- 239000010959 steel Substances 0.000 title claims abstract description 142
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 34
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000005864 Sulphur Substances 0.000 title claims abstract description 20
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 30
- 239000011777 magnesium Substances 0.000 claims abstract description 25
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 11
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005275 alloying Methods 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004411 aluminium Substances 0.000 claims abstract description 11
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004925 denaturation Methods 0.000 claims abstract description 10
- 230000036425 denaturation Effects 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 5
- 229910003112 MgO-Al2O3 Inorganic materials 0.000 claims description 2
- 239000010813 municipal solid waste Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 description 33
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 9
- 238000010079 rubber tapping Methods 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000009847 ladle furnace Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 241000255964 Pieridae Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of methods for improving Tempered Steel Containing Sulphur castability and transverse impact toughness.This method can be in the case where not changing original production process route, and molten steel feeds calcium-magnesium alloy line after aluminium deoxidation, with feeding wire machine to carry out denaturation treatment to steel inclusion, improves the castability and transverse impact toughness of steel.This method can expand the liquid phase region that oxide is mingled with, and the ratio of lower melting point inclusion in molten steel be improved, to improve the castability of steel.Simultaneously, Ca, Mg alloying element can form complex sulfide (Ca in conjunction with MnS in steel, Mn) S, (Mg, Mn) S and (Ca, Mg, Mn) S, the purer MnS of the non-deformability of the complex sulfide of the type at high temperature is strong, at fusiform after rolling, the ratio of fusiform field trash in steel is improved, to achieve the purpose that improve steel transverse impact toughness.
Description
Technical field
The present invention relates to a kind of methods for improving Tempered Steel Containing Sulphur castability and transverse impact toughness.
Background technique
Compared with traditional quenched and tempered steel, non-hardened and tempered steel can simplify the technological process of production due to being not required to by modulation treatment,
Stock utilization is improved, is reduced environmental pollution, production cost is reduced.Studies have shown that non-hardened and tempered steel compared with quenched and tempered steel, can reduce
Total manufacturing cost 25%~38%, 700~900kwh/ tons of workpiece of energy conservation shorten the production cycle 15%, improve stock utilization
10%.Non-hardened and tempered steel passes through development in decades, chemical component, processing technology, application range, description etc.
Diversified variation all has occurred in feature, has been widely used in the crowds such as automobile, building, heavy-duty machinery, petrochemical industry, bridge
Multi-field, application is increasingly taken seriously.
In order to improve the machinability of non-hardened and tempered steel, 0.03%~0.07% sulphur is added usually in steel, in steel
Middle formation MnS.For steel in cutting process, MnS plays the role of chip breaking and lubrication, to reduce tool wear, improves steel
Cutting ability.However, steel is during the rolling process, MnS can seriously be damaged along rolling direction stretcher strain, deformed MnS
The transverse impact toughness of steel makes material mechanical performance in anisotropy.In order to eliminate or reduce MnS to the mechanical property of steel not
Benefit influences, while guaranteeing the cutting ability of steel, it is therefore necessary to carry out denaturation treatment to the MnS in steel.MnS in steel is denaturalized at present
Handling most common method is that the alloying elements such as Ca, Te, Zr, RE are added in steel.
In order to improve the degree of purity of steel, guarantees oxygen content low in non-hardened and tempered steel, generally use Al and carry out deep deoxidation, due to
Deoxidation products is high-melting-point Al2O3, it is be easy to cause nozzle blocking, therefore in order to which heat pours in the company of raising, usually Al killed steel is carried out
Ca processing, makes Al in molten steel2O3It is mingled with the calcium-aluminate that denaturation is low melting point to be mingled with.However, the effect and composition of steel of Ca processing are close
Cut phase is closed, and with the increase of [S] content in steel, " liquid " region of field trash is strongly reduced after Ca processing, or even disappears.Cause
This, when containing S in steel, castability is improved with Ca processing just becomes more difficult, needs the amount of the good Ca processing of strict control
With the relationship of molten steel component, the formation of CaS and high-melting-point calcium aluminate are avoided.
Summary of the invention
The present invention is intended to provide a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness.This method can
In the case where not changing original production process route, molten steel after aluminium deoxidation, with feeding wire machine feed calcium-magnesium alloy line come pair
Steel inclusion carries out denaturation treatment, improves the castability and transverse impact toughness of steel.This method can expand what oxide was mingled with
The ratio of lower melting point inclusion in molten steel is improved, to improve the castability of steel in liquid phase region.Meanwhile Ca, Mg alloying element can
To form complex sulfide (Ca, Mn) S, (Mg, Mn) S and (Ca, Mg, Mn) S, the composite sulfuration of the type in conjunction with MnS in steel
The purer MnS of the non-deformability of object at high temperature is strong, at fusiform after rolling, improves the ratio of fusiform field trash in steel
Example, to achieve the purpose that improve steel transverse impact toughness.
In order to achieve the above objectives, the present invention is achieved through the following technical solutions:
A method of Tempered Steel Containing Sulphur castability and transverse impact toughness are improved, the described method comprises the following steps:
1) molten steel carries out deoxidation with aluminium deoxidation mode, and after the completion of aluminium deoxidation, full aluminium mass percentage content is in molten steel
0.02~0.03%；
2) calcium-magnesium alloy is added into molten steel, is made Mg mass percentage content 0.0010~0.0050% in steel, is made steel
Middle Ca mass percentage content is 0.0015~0.0050%；
3) it is required to add sulphur into steel according to steel grades；
4) continuous casting or molding use molding casting.
Technical points include:
(1) molten steel carries out deep deoxidation using Al, and controlling Holo-Al content in molten steel is 0.02~0.03%.
(2) molten steel is after Al deoxidation, ladle bottom Argon, and deoxidation products floating is allowed to add calcium and magnesium into steel after five minutes
Alloy.Controlling Mg content in steel is 0.0010~0.0050%, and Ca content is 0.0015~0.0050% in steel；
(3) addition calcium-magnesium alloy after twenty minutes, requires to add sulphur into steel according to steel grades.
(4) continuous casting or molding use molding casting, prevent molten steel secondary oxidation.
Molten steel of the present invention, by adding Mg, Ca alloying element of certain content in steel, makes in steel after aluminium deoxidation
Al2O3Being mingled with denaturation is CaO-MgO-Al2O3Composite oxides, relative to calcium-aluminate, the composite oxides of the type have more
Big Liquid region (as shown in Figure 1), makes solid-state Al in molten steel2O3Being mingled with more easily denaturation is liquid inclusions, to a certain degree
The upper reduction for offsetting the Liquid region due to caused by addition S, to improve the effect of Ca processing.Meanwhile studies have shown that in steel
The field trash the tiny more is conducive to the denaturation of field trash, and the Mg that certain content is added in steel can just refine field trash, from
And Ca treatment effect is further increased, the probability of nozzle blocking is reduced, increases and even pours heat.
Mg, Ca alloying element are added in sulfur bearing steel simultaneously, can make pure MnS denaturation in steel is complex sulfide (Ca, Mn)
S, (Mg, Mn) S and (Ca, Mg, Mn) S, the purer MnS of the non-deformability of the complex sulfide of these types of type at high temperature is strong,
At fusiform after rolling, the ratio of fusiform field trash in steel is improved, improves steel transverse impact toughness to reach
Purpose.
The beneficial effects are mainly reflected as follows:
(1) Ca, Mg alloying element are added in molten steel, can be expanded the Liquid region of composite oxides, are conducive to obtain liquid
State field trash improves molten steel castability.
(2) Ca, Mg alloying element are added in sulfur bearing steel, is dissolved in MnS, complex sulfide is formed, and are improved and are spun in steel
It hammers the ratio of shape field trash into shape, improves steel transverse impact toughness.
(3) traditional Calcium treatment need to be only changed to addition two kinds of alloying elements of Ca, Mg by the method for the invention, available
The method of Calcium treatment in original production process will not change original production technology or original production technology it goes without doing larger change.
Detailed description of the invention
Fig. 1 is content of MgO to CaO-SiO2-Al2O3It is the influence diagram of Liquid region in phasor；
Fig. 2 is oxide pattern in calcium treated steel；
Fig. 3 is composite oxides pattern in addition calcium-magnesium alloy element steel；
Fig. 4 is MnS pattern in stocking；
Fig. 5 is complex sulfide pattern in stocking.
Specific embodiment
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 to concrete restriction of the invention.
With the drawings and specific embodiments, the present invention is described in further detail below.
A method of improving Tempered Steel Containing Sulphur castability and transverse impact toughness, comprising:
(1) molten steel carries out deep deoxidation using Al, and controlling Holo-Al content in molten steel is 0.02~0.03%.
(2) molten steel is after Al deoxidation, ladle bottom Argon, and deoxidation products floating is allowed to add calcium and magnesium into steel after five minutes
Alloy.Controlling Mg content in steel is 0.0010~0.0050%, and Ca content is 0.0015~0.0050% in steel；
(3) addition calcium-magnesium alloy after twenty minutes, requires to add sulphur into steel according to steel grades.
(4) continuous casting or molding use molding casting, prevent molten steel secondary oxidation.
According to the above method, smelted using " electric furnace (50t)-ladle furnace (LF)-vacuum drying oven (VD)-continuous casting-rolling " technique
6 furnace Tempered Steel Containing Sulphurs.Wherein 3 furnace steel use traditional Calcium treatment, and in addition 3 furnace steel add Ca, Mg alloying element.Steel at
Divide as shown in table 1.It is sampled on slab, analyzes steel inclusion pattern, Fig. 2 is oxide pattern in calcium treated steel, and Fig. 3 is to add
Add composite oxides pattern in calcium-magnesium alloy element steel.By Fig. 2-3 as it can be seen that oxide is irregular shape in calcium treated steel, say
Bright oxide is solid-state in steel, and oxide is spherical in the steel of addition calcium-magnesium alloy element, illustrates the type field trash in steel
It is liquid in liquid.
Table 1 tests steel main chemical compositions (mass percent, %)
Note: unlisted chemical component in table are as follows: Cr 0.05~0.08%, P≤0.015%, N ﹤ 0.005%.
It is sampled on stocking, analyzes the transverse impact toughness and Morphology of Sulfide of steel.Impact test is according to national standard GB/
T229-1994 is tested using Charpy impact machine tester, and for test sample having a size of 10 × 10 × 55mm, groove is U-shaped mouth；Table 2
For 6 specific embodiment side knock function for testing steel.The side knock of the steel of calcium-magnesium alloy element is added it can be seen from table
Function is higher than the side knock function of calcium treated steel.Fig. 4 is strip MnS field trash pattern in calcium treated steel stocking, and Fig. 5 is addition
Fusiform complex sulfide pattern in Ca, Mg alloying element steel stocking.
Table 2 tests steel side knock function
| Heat (batch) number | Test temperature DEG C | Ballistic work AKU2, J/cm2 |
| 1 | 20 (room temperatures) | 23.12 |
| 2 | 20 (room temperatures) | 26.12 |
| 3 | 20 (room temperatures) | 25.38 |
| 4 | 20 (room temperatures) | 30.79 |
| 5 | 20 (room temperatures) | 33.04 |
| 6 | 20 (room temperatures) | 32.12 |
Steelmaking is as follows:
Raw material: molten iron and steel scrap (molten iron scrap ratio is 1:1), feed stock for blast furnace need to keep cleaning drying.
Eaf process: smelting process has made foamed slag, uniform decarburization, reduces and inhales nitrogen.Slag material is left by 13~20kg/t steel
Right addition, finishing slag basicity (CaO/SiO2)≥3.5.Terminal C >=0.10%, P≤0.015%, residual element content comply with standard
It is required that；Tapping temperature is 1620~1660 DEG C.100 kilograms of silicomangans are added at packet bottom before electric furnace steel tapping.Tapping process, with out
Steel stream adds steel-core-aluminium 1.05~2.5kg/t steel, when aim carbon is lower than 0.10%, is added by the upper limit.Under electric furnace steel tapping process is forbidden
Slag, slag heat must skim.
Ladle furnace (LF furnace) technique: control basicity of slag > 3.5, refining process keep white slag, are sufficiently stirred under white slag
Afterwards, 0.5~1.5m/ of aluminum steel tons of steel is fed.The component contents such as adjustment C, Mn, Si, V are required according to steel grades.Before tapping, according to
1.0~2.5m/t steel feeds calcium line, or feeds calcium-magnesium alloy line according to 1.0~2.0m/t steel.Tapping condition: element sulphur is removed
Outside, remaining chemical component meets target call；The white slag retention time is greater than 20min.Tapping temperature is controlled according to rhythm of production, is protected
After demonstrate,proving VD vacuum processing, the temperature of upper continuous casting steel meets the requirements.
Vacuum drying oven (VD) technique: enter the stokehold VD and skim.It to after VD station, requires according to steel grades, is fed with feeding wire machine
Sulphur line.Vacuum degree < 67Pa, retention time >=12 minute.Soft argon blowing time >=12 minute after VD processing, when soft blow argon, forbid naked
Reveal molten steel and the stirring cooling of big argon gas amount, control molten steel temperature is 1533~1563 DEG C after Argon.
Continuous casting process: continuous casting total process protective casting prevents molten steel air-breathing.Liquid level fluctuation of crystallizer≤± 3mm.In wrapped
Temperature is controlled at 25~35 DEG C.180mm × 220mm base type pulling rate is 0.95~1.15m/min, 260mm × 300mm base type pulling rate
For 0.50~0.60m/min.Into withdrawal straightening machine temperature >=920 DEG C, slow cooling time should be greater than 24 hours slab.
Technological parameter (such as temperature, time) section bound value of the invention and interval value can realize this law,
Embodiment numerous to list herein.
Ordinary skill in the art knowledge can be used in the unspecified content of the present invention.
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 technical side of the 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
Scope of the claims in.
Claims (5)
1. a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness, the method mainly includes following step
It is rapid:
1) molten steel carries out deoxidation with aluminium deoxidation mode, after the completion of aluminium deoxidation, in molten steel full aluminium mass percentage content be 0.02~
0.03%；
2) calcium-magnesium alloy is added into molten steel, is made Mg mass percentage content 0.0010~0.0050% in steel, is made Ca in steel
Mass percentage content is 0.0015~0.0050%；
3) it is required to add sulphur into steel according to steel grades；
4) continuous casting or molding use molding casting.
2. according to a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness, feature described in claim 1
Be: S content is 0.035~0.075% in steel.
3. according to a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness, feature described in claim 1
Be: pure MnS denaturation is complex sulfide (Ca, Mn) S, (Mg, Mn) S and (Ca, Mg, Mn) S in steel, is answered after rolling at fusiform
Close sulfide.
4. according to a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness, feature described in claim 1
It is: side knock function >=23.12J/cm of the Tempered Steel Containing Sulphur in room temperature2。
5. according to a kind of method for improving Tempered Steel Containing Sulphur castability and transverse impact toughness, feature described in claim 1
Be: molten steel, by adding Mg, Ca alloying element in steel, makes Al in steel after aluminium deoxidation2O3Being mingled with denaturation is CaO-
MgO-Al2O3Composite oxides.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182162A (en) * | 2021-12-21 | 2022-03-15 | 广东韶钢松山股份有限公司 | Smelting method of non-quenched and tempered steel, non-quenched and tempered steel and connecting rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779907A (en) * | 2016-03-19 | 2016-07-20 | 上海大学 | Free-cutting steel containing magnesium and calcium and production process |
| CN105803308A (en) * | 2016-03-19 | 2016-07-27 | 上海大学 | Magnesium and calcium-containing 45MnVS free machining quenched and tempered steel and manufacturing method thereof |
| CN106086303A (en) * | 2016-07-28 | 2016-11-09 | 上海大学 | Magnesium calcium alloy core-spun yarn of Ferrous Metallurgy and preparation method thereof |
| CN107760824A (en) * | 2017-09-15 | 2018-03-06 | 上海大学 | The smelting process that sulphide inculsion modifies in non-hardened and tempered steel or pinion steel |
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2019
- 2019-02-18 CN CN201910122874.7A patent/CN109735684A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779907A (en) * | 2016-03-19 | 2016-07-20 | 上海大学 | Free-cutting steel containing magnesium and calcium and production process |
| CN105803308A (en) * | 2016-03-19 | 2016-07-27 | 上海大学 | Magnesium and calcium-containing 45MnVS free machining quenched and tempered steel and manufacturing method thereof |
| CN106086303A (en) * | 2016-07-28 | 2016-11-09 | 上海大学 | Magnesium calcium alloy core-spun yarn of Ferrous Metallurgy and preparation method thereof |
| CN107760824A (en) * | 2017-09-15 | 2018-03-06 | 上海大学 | The smelting process that sulphide inculsion modifies in non-hardened and tempered steel or pinion steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182162A (en) * | 2021-12-21 | 2022-03-15 | 广东韶钢松山股份有限公司 | Smelting method of non-quenched and tempered steel, non-quenched and tempered steel and connecting rod |
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