CN109972024A - A kind of preparation method of pinion steel Steel Bar and preparation method thereof and rod iron - Google Patents
A kind of preparation method of pinion steel Steel Bar and preparation method thereof and rod iron Download PDFInfo
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- CN109972024A CN109972024A CN201910392756.8A CN201910392756A CN109972024A CN 109972024 A CN109972024 A CN 109972024A CN 201910392756 A CN201910392756 A CN 201910392756A CN 109972024 A CN109972024 A CN 109972024A
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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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- 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
- C22C38/40—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
Abstract
The invention discloses the preparation methods of a kind of pinion steel Steel Bar and preparation method thereof and rod iron.The composition of the pinion steel Steel Bar includes the chemical component of following mass percent: C:0.17%~0.24%;Mn:0.85%~1.07%;Si:0.19%~0.30%;Cr:0.98%~1.10%;Mo:0.05%~0.10%;Ni:0.15%~0.25%;Al:0.01%~0.05%;P: less than 0.02%;S: less than 0.02%;Surplus is Fe, and the mass ratio of pinion steel the Steel Bar Mn and Si are between 3.5 to 4.0.Pinion steel Steel Bar provided by the present invention has preferable end hardenability.Simple production process simultaneously, cost is relatively low.
Description
Technical field
The present invention relates to pinion steel Steel Bar field more particularly to a kind of pinion steel Steel Bars, the pinion steel rod iron
Rod iron is made with the preparation method of steel and using the pinion steel Steel Bar.
Technical background
Auto industry is that the important symbol auto industry of one national economic development level of measurement is to measure country's warp
The important symbol for development level of helping, automobile gear is driving parts important on automobile, it is responsible for the task of transmitting power, tooth
The height of wheel quality decides the quality of automotive performance.Automobile gear processing industry, automobile production manufacturer and autoist are all uncommon
Hope that automobile gear should include highly resistance ability, height stings ability, small deformation ability, high accuracy of gear ability, highly resistance tooth root flexural fatigue
Ability, high service life, good processing performance stability.In general, the pinion steel of high quality should have the matter there are four aspect
Figureofmerit, i.e., narrow end hardenability are wide;Cleanliness is high;The grain size of fine uniform and excellent surface quality.
The end hardenability of pinion steel reflects the centre hardness of pinion steel, the end hardenability of steel is better, then gear
Depth of hardening zone is deeper, and pinion steel is smaller through the back-geared deflection of Overheating Treatment, and gear reconditioning quality is smaller, and occlusion precision is got over
Height is more conducive to the processing of gear and the stabilization of performance.There are many factor for influencing pinion steel end hardenability, sum up main
There are three the factors of aspect: first is that the chemical component of steel;Second is that autstenitic grain size;Third is that austenitizing degree.In many shadows
Ring factor in, the influence of the uniformity of the chemical component and chemical component of steel is mostly important, in chemical component C, Ni, Mn, Cr and
Mo is conducive to improve the end hardenability of steel.In general, representing the end hardenability energy of steel, through hardening with end hardenability bandwidth
Property bandwidth is smaller, and the through hardening performance of steel is better.
Therefore, pinion steel how to be made to obtain the preferable end hardenability technical problem urgently to be resolved as this field.
Summary of the invention
It is an object of the invention to: for deficiency present in current techniques, provide a kind of pinion steel Steel Bar, the tooth
Take turns the preparation method of steel Steel Bar.The pinion steel Steel Bar adds suitable on the basis of common C-Si-Mn mild steel
Microalloy element such as Mo, Ni, and define that steel grade silicon compares suddenly, the alloying element ratio for being optimal.Pass through composite alloy
Change on the basis of giving full play to each alloy element action, each alloying element interaction synergistic effect reaches Fracture of Material and surface
The cooperation of wearability.With inexpensive ordinary steel production process equipment (electric arc furnaces-LF- (VD-)-continuous casting and direct rolling) in preparation method
High quality special steel kind is produced, the property of steel is realized using special thermal treatment technique.The gear that the present invention obtains
Steel Steel Bar has preferable end hardenability.
Technical method of the invention are as follows:
A kind of pinion steel Steel Bar, wherein the pinion steel Steel Bar include following mass percent chemistry at
Point:
C:0.17%~0.24%;Mn:0.85%~1.07%;Si:0.19%~0.30%;Cr:0.98%~
1.10%;Mo:0.05%~0.10%;Ni:0.15%~0.25%;Al:0.01%~0.05%;P: less than 0.02%;S:
Less than 0.02%;Surplus is Fe, and the mass ratio of pinion steel Steel Bar the kind Mn and Si are between 3.5 to 4.0.Manganese silicon
Than the mobility that can be improved molten steel 3.5 or more, pourability is improved.Silica dystecticization can be generated lower than 3.5
Object is closed, is unfavorable for being poured, especially will cause molten steel premature solidification when pouring temperature is lower, reduce molten steel recovery rate.
The preparation method of the pinion steel Steel Bar, comprising the following steps:
(1) according to the composition and ratio of the pinion steel Steel Bar, it is blended into arc melting by blast-melted, is obtained just
Beginning molten steel is added ferroalloy and carries out alloying into ladle, then carries out LF and VD to the molten steel after the alloying and refine, with
It obtains described to cast steel water;
The ferroalloy is Antaciron, manganeisen, ferrochrome, dilval and ferro-molybdenum;
(2) continuous casting will be carried out to cast steel water, and will obtain steel billet, i.e. Steel Bar.
A kind of rod iron is made of above-mentioned pinion steel Steel Bar.
The preparation method of the rod iron, comprising the following steps:
(1) steel billet is subjected to continuous rolling, is rolled into the rod iron of required specification.Wherein, start rolling temperature 1050-
1100 DEG C, finishing temperature is 950 DEG C to 1000 DEG C;Then rear product will be rolled and be air-cooled to room temperature;
(2) roll product after cooling is heated to 900 DEG C, soaking time 30mins;Then water cooling is cold to 300 DEG C
But the time is 10mins;Product after cooling is subjected to tempering again, tempering temperature is 400 DEG C, soaking time 80mins,
Finally obtain required rod iron.
In the present invention, improve the respective performances of steel grade by adding appropriate microalloy element.Wherein addition Mo improves steel
Temper resistance improves plasticity, increases the drag of cracking and abrasion;Design of the mass ratio of Mn and Si between 3.5 to 4.0,
Since Mn has acted on solution strengthening effect, Si is based on stable austenite;Influence of the Ni to the harden ability of steel is weaker, and Ni is also
Austenite former can postpone the phase transformation of austenite, improve the harden ability of steel;The main function of Cr is to improve harden ability,
Low-carbon lath-shaped martensitic structure is obtained when quenching, carries out tissue preparation to obtain good service performance.What the present invention obtained
The end hardenability broadband value of pinion steel Steel Bar is less than 4HRC.
Therefore, pinion steel Steel Bar provided by the present invention has preferable end hardenability.Simultaneously at production. art letter
Single, cost is relatively low.
Specific embodiment
Example embodiments are described in detail here.Embodiment described in following exemplary embodiment
Do not represent all embodiments consistented with the present invention.On the contrary, they are only detailed with the institute in such as the appended claims
The example of device and method stating, some aspects of the invention are consistent.
As the first aspect of the invention, a kind of pinion steel Steel Bar is provided, wherein the pinion steel Steel Bar
Chemical component including following mass percent:
C:0.17%~0.24%;
Mn:0.85%~1.07%;
Si:0.19%~0.30%;
Cr:0.98%~1.10%;
Mo:0.05%~0.10%;
Ni:0.15%~0.25%;
Al:0.01%~0.05%;
P: less than 0.02%;
S: less than 0.02%;
Surplus is Fe, and the mass ratio of pinion steel Steel Bar the kind Mn and Si are between 3.5 to 4.0.
Pinion steel Steel Bar provided by the present invention belongs to low-carbon and low-alloy micro alloyed steel.Why it is referred to as pinion steel
Steel Bar is because steel provided by the present invention needs to be processed into bar.
The increase of C content in steel, can reduce the critical cooling rate of steel, thus increase the harden ability of steel, but C contains
Amount has been more than when the C content of eutectoid reaction occurs, then with the increase of C content, the harden ability of steel can then be reduced.
The content for increasing Mn in steel can postpone the austenite transformation of steel, increase the harden ability of steel, but Mn is generated in steel
Harden ability can be reduced when Mn S.
Ni is austenite former, can postpone the phase transformation of austenite, improves the harden ability of steel.Limit the quality of Ni
Score is 0.15%~0.25%, in order to keep the low temperature of steel wilful and intensity index.
Mo can postpone the transformation of austenite phase transformation product pearlite, to improve the harden ability of steel.
The harden ability of steel can be improved in Cr, and high-intensitive martensitic structure is formed in steel.After different temperatures is tempered
It can get different obdurability combinations, meet different service condition demands.In addition, Cr can also play refinement crystal grain and more with carbide
Dissipate the effect strengthened.In the present invention, the mass ratio of Cr is 0.98%~1.10%, to keep while improving the intensity of steel
The welding performance of steel.
As the second aspect of the invention, a kind of rod iron is provided, wherein the rod iron is by provided by the present invention above-mentioned
Pinion steel Steel Bar is made.
Since the pinion steel Steel Bar has good end hardenability, the rod iron has good end
End quenching permeability.
As the third aspect of the invention, a kind of preparation method of pinion steel Steel Bar is provided, wherein the gear
Steel rod iron is said gear steel Steel Bar provided by the present invention, and the preparation method includes:
It is smelted using the raw material of the pinion steel Steel Bar, to obtain to cast steel water;
Continuous casting is carried out to cast steel water to described, to obtain steel billet;
To the steel billet carry out continuous rolling, wherein start rolling temperature be 1050-1100 DEG C, finishing temperature be 950 DEG C-
1000℃;
It is air-cooled for room temperature that rear product will be rolled;
In continuous casting process, whole process protection is needed to cast.In the art, protective casting refers to the steel being exposed in air
Liquid takes protection, a kind of important technical measures aoxidized to avoid molten steel by air secondary.
Preferably, it is air-cooled that the preparation method, which includes to the roll product type of cooling,.Using it is air-cooled to roll product into
Row cooling can also reduce the cost for manufacturing the pinion steel Steel Bar;
In order to improve the performance of the pinion steel Steel Bar, it is preferable that the preparation method further include:
Roll product after cooling is heat-treated, comprising:
Roll product after cooling is heated to 900 DEG C, soaking time is 30mins (minute);
Then for water cooling to 300 DEG C, cooling time is 10mins (minute);
Product after cooling is subjected to tempering again, tempering temperature is 400 DEG C, soaking time 80mins, finally
To required rod iron.
Embodiment 1
In the present invention, the smelting of raw material is carried out using 100 tons of electric arc furnaces, is refined using 100 tons of LF and VD.Utilize with
Lower section method prepares pinion steel Steel Bar:
S1, to iron ore carry out blast furnace process obtain it is blast-melted, blast-melted weight be 40 tons;
S2, it is blended into arc melting by blast-melted, obtains initial molten steel, ferroalloy is added and carries out alloy into ladle
Change, then LF and VD is carried out to the molten steel after the alloying and is refined, wherein blast furnace molten steel and iron are closed using 100 tons of electric arc furnaces
Gold carries out melting, and ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50C1.0), dilval (FeNi50) and ferro-molybdenum (FeMo70), purity are 99.7%, and weight is respectively
1500Kg, 3500Kg, 3500Kg, 800Kg, 400Kg, remaining is molten iron and steel scrap;
S3, the molten steel after melting is refined using 100 tons of LF and VD;
S4, continuous casting obtain 165x165mm2Square billet and pinion steel Steel Bar;
S5, start rolling temperature are 1050 DEG C, and finishing temperature is 950 DEG C;Continuous rolling at required specification rod iron, it is then empty
It is cooled to room temperature;
S6, heating temperature be 900 DEG C, keep the temperature 30mins;
S7, water cooling temperature are 300 DEG C, and the water cooling time is 10mins;
S8, tempering temperature be 400 DEG C, soaking time 80mins obtains final product;
S9, the detection by direct reading spectrometry, chemistry becomes and mass percent are as follows: C:0.22%;Mn:0.98%;
Si:0.25%;Cr:0.98%;Mo:0.09%;Ni:0.23%;Al:0.02%;P: less than 0.02%;S: less than 0.02%;
Surplus is Fe, and the mass ratio of pinion steel Steel Bar the kind Mn and Si are 3.92.
S10, through detecting, pinion steel Steel Bar end hardenability broadband value made from method provided by the present invention is
4HRC。
Embodiment 2
In the present invention, the smelting of raw material is carried out using 100 tons of electric arc furnaces, is refined using 100 tons of LF and VD.Utilize with
Lower section method prepares pinion steel Steel Bar:
S1, to iron ore carry out blast furnace process obtain it is blast-melted, blast-melted weight be 42 tons;
S2, it is blended into arc melting by blast-melted, obtains initial molten steel, ferroalloy is added and carries out alloy into ladle
Change, then LF and VD is carried out to the molten steel after the alloying and is refined, wherein blast furnace molten steel and iron are closed using 100 tons of electric arc furnaces
Gold carries out melting, and ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50C1.0), dilval (FeNi50) and ferro-molybdenum (FeMo70), purity are 99.7%, and weight is respectively
1500Kg, 3500Kg, 3500Kg, 800Kg, 400Kg, remaining is molten iron and steel scrap;
S3, the molten steel after melting is refined using 100 tons of LF and VD;
S4, continuous casting obtain 165x165mm2Square billet and pinion steel Steel Bar;
S5, start rolling temperature are 1060 DEG C, and finishing temperature is 960 DEG C;Continuous rolling at required specification rod iron, it is then empty
It is cooled to room temperature;
S6, heating temperature be 900 DEG C, keep the temperature 30mins;
S7, water cooling temperature are 300 DEG C, and the water cooling time is 10mins;
S8, tempering temperature be 400 DEG C, soaking time 80mins obtains final product;
S9, the detection by direct reading spectrometry, chemistry becomes and mass percent are as follows: C:0.18%;Mn:1.01%;
Si:0.28%;Cr:1.05%;Mo:0.08%;Ni:0.20%;Al:0.03%;P: less than 0.02%;S: less than 0.02%;
Surplus is Fe, and the mass ratio of pinion steel Steel Bar the kind Mn and Si are 3.61.
S10, through detecting, pinion steel Steel Bar end hardenability broadband value made from method provided by the present invention is
3.5HRC。
Embodiment 3
In the present invention, the smelting of raw material is carried out using 100 tons of electric arc furnaces, is refined using 100 tons of LF and VD.Utilize with
Lower section method prepares pinion steel Steel Bar:
S1, to iron ore carry out blast furnace process obtain it is blast-melted, blast-melted weight be 50 tons;
S2, it is blended into arc melting by blast-melted, obtains initial molten steel, ferroalloy is added and carries out alloy into ladle
Change, then LF and VD is carried out to the molten steel after the alloying and is refined, wherein blast furnace molten steel and iron are closed using 100 tons of electric arc furnaces
Gold carries out melting, and ferroalloy is Antaciron (FeSi75), manganeisen (FeMn68C4.0), ferrochrome
(FeCr50C1.0), dilval (FeNi50) and ferro-molybdenum (FeMo70), purity are 99.7%, and weight is respectively
1500Kg, 3500Kg, 3500Kg, 800Kg, 400Kg (weight can be adjusted according to the actual situation), remaining is molten iron and gives up
Steel;
S3, the molten steel after melting is refined using 100 tons of LF and VD;
S4, continuous casting obtain 165x165mm2Square billet and pinion steel Steel Bar;
S5, start rolling temperature are 1080 DEG C, and finishing temperature is 990 DEG C;Continuous rolling at required specification rod iron, it is then empty
It is cooled to room temperature;
S6, heating temperature be 900 DEG C, keep the temperature 30mins;
S7, water cooling temperature are 300 DEG C, and the water cooling time is 10mins;
S8, tempering temperature be 400 DEG C, soaking time 80mins obtains final product;
S9, the detection by direct reading spectrometry, chemistry becomes and mass percent are as follows: C:0.20%;Mn:1.05%;
Si:0.28%;Cr:1.0%;Mo:0.07%;Ni:0.21%;Al:0.035%;P: less than 0.02%;S: less than 0.02%;
Surplus is Fe, and the mass ratio of pinion steel Steel Bar the kind Mn and Si are 3.75.
S10, through detecting, pinion steel Steel Bar end hardenability broadband value made from method provided by the present invention is
3.0HRC。
The foregoing is merely some embodiments of the invention, the embodiment being not all of, ordinary skill people
Any equivalent variation that member takes the technology of the present invention method by reading description of the invention, is right of the invention
It is required that being covered.
Unaccomplished matter of the present invention is well-known technique.
Claims (3)
1. a kind of pinion steel Steel Bar, it is characterized in that the group of the pinion steel Steel Bar becomes the change of following mass percent
It studies point: C:0.17%~0.24%;Mn:0.85%~1.07%;Si:0.19%~0.30%;Cr:0.98%~
1.10%;Mo:0.05%~0.10%;Ni:0.15%~0.25%;Al:0.01%~0.05%;P: less than 0.02%;S:
Less than 0.02%;Surplus is Fe;The mass ratio of pinion steel the Steel Bar Mn and Si are 3.5~4.0.
2. the preparation method of pinion steel Steel Bar as described in claim 1, it is characterised in that: the following steps are included:
(1) according to the composition and ratio of the pinion steel Steel Bar, it is blended into arc melting by blast-melted, obtains initial steel
Water is added ferroalloy and carries out alloying into ladle, then carries out LF and VD to the molten steel after the alloying and refine, to obtain
It states to cast steel water;
The ferroalloy is Antaciron, manganeisen, ferrochrome, dilval and ferro-molybdenum;
(2) continuous casting will be carried out to cast steel water, and will obtain steel billet, i.e. Steel Bar.
3. a kind of preparation method of rod iron, which comprises the following steps:
(1) steel billet for preparing claim 2 carries out continuous rolling, is rolled into required specification rod iron;Wherein, start rolling temperature is
1050-1100 DEG C, finishing temperature is 950 DEG C to 1000 DEG C, and it is air-cooled for room temperature then will to roll rear product;
(2) roll product after cooling is heated to 900 DEG C, soaking time 30mins;Then water cooling is to 300 DEG C, when cooling
Between be 10mins;Product after cooling is subjected to tempering again, tempering temperature is 400 DEG C, soaking time 80mins, finally
Obtain required rod iron.
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CN114855073A (en) * | 2022-04-08 | 2022-08-05 | 张家港广大特材股份有限公司 | High-quality die-cast wind power gear steel and preparation method thereof |
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