CN109609855A - A kind of sulfur-bearing micro alloyed steel and its energy-saving production method and application - Google Patents
A kind of sulfur-bearing micro alloyed steel and its energy-saving production method and application Download PDFInfo
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- CN109609855A CN109609855A CN201910070059.0A CN201910070059A CN109609855A CN 109609855 A CN109609855 A CN 109609855A CN 201910070059 A CN201910070059 A CN 201910070059A CN 109609855 A CN109609855 A CN 109609855A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/06—Crankshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention relates to a kind of sulfur-bearing micro alloyed steel and its energy-saving production method and applications, belong to extraordinary steel technical field of smelting.Contain manganese sulfide precipitate in the sulfur-bearing micro alloyed steel；The size of the manganese sulfide precipitate is less than or equal to 5 microns；The manganese sulfide precipitate is directly precipitated in casting process.Preparation method are as follows: sulfur-bearing micro alloyed steel steel is smelted using melting technique, then by qualified molten steel using being cast by the way of rapid cooling, directly produce manganese sulfide precipitate average-size less than 5 microns and the sulfur-bearing micro alloyed steel finished product of Dispersed precipitate.The sulfur-bearing micro alloyed steel that the present invention designs and prepares eliminates long-time heat preservation treatment process compared with traditional handicraft, with significant energy-efficient advantage, qualified products can be directly obtained by casting and manganese sulfide precipitation size therein is not higher than traditional handicraft, and cutting ability is good.Products obtained therefrom of the present invention can be directly used for forging and prepare forging.
Description
Technical field
The present invention relates to a kind of sulfur-bearing micro alloyed steel and its energy-saving production method and applications, belong to extraordinary iron and steel smelting technology
Field.
Background technique
Sulfur-bearing micro alloyed steel is a kind of common high added value steel product, is widely used in the important neck such as auto industry
Domain, main application are the production components such as automobile crane and connecting rod.Traditional steel industry is for sulfur-bearing micro alloyed steel production procedure one
As be melting, casting along with subsequent prolonged heating and isothermal holding.
It is prolonged to heat to obtain the suitable product of cutting ability since the steel grade is more demanding for cutting ability
And heat preservation link is essential.In this link, manganese sulfide precipitate of the routine casting into steel can be refined significantly, thus
Greatly improve the cutting ability of steel.But prolonged insulating process is very important for the consumption of the energy.
So far, the energy saving technique of sulfur-bearing micro alloyed steel production is not yet developed.
Summary of the invention
In view of existing a variety of sulfur-bearing micro alloyed steel production methods, but it is basic that machinability can not directly obtained by casting
The method of the good sulfur-bearing micro alloyed steel of energy.The present invention provides a kind of sulfur-bearing micro alloyed steel and its energy-saving production method and answer
With.Properties of product that are designed and producing are not less than traditional handicraft product.The present invention exempts from by using the method for special casting
Subsequent technique is removed, the purpose for greatling save the energy is played.
A kind of sulfur-bearing micro alloyed steel of the present invention contains manganese sulfide precipitate in the sulfur-bearing micro alloyed steel；The manganese sulfide
The size of precipitate is less than or equal to 5 microns；The manganese sulfide precipitate is directly precipitated in casting process.
A kind of sulfur-bearing micro alloyed steel of the present invention, sulfur-bearing micro alloyed steel contain Fe, C, Si, Mn, P, S, Nb, V, Ti, Ni, Cr,
N。
Preferably, a kind of sulfur-bearing micro alloyed steel of the present invention, by percentage to the quality, the sulfur-bearing microalloy ladle
It includes: C:0.4-0.6%, Si:0.2-0.5%, Mn:0.6-0.9%, P:0.005-0.01%, S:0.04-0.07%, Nb:
0.01-0.03%, V:0.08-0.12%, Ti:0.02-0.05%, Ni:0.1-0.3%, Cr:0.1-0.3%, N:0.1-
0.2%, Fe: surplus.
Scheme as a further preference, a kind of sulfur-bearing micro alloyed steel of the present invention, by percentage to the quality, the sulfur-bearing is micro-
Steel alloy includes: C:0.4-0.5%, Si:0.3-0.4%, Mn:0.7-0.8%, P:0.006-0.008%, S:0.05-
0.06%, Nb:0.015-0.025%, V:0.09-0.11%, Ti:0.03-0.04%, Ni:0.15-0.25%, Cr:0.15-
0.25%, N:0.12-0.18%, Fe: surplus.
A kind of method of production energy-saving sulfur-bearing micro alloyed steel of the present invention, includes the following steps:
Step 1
Match by design component and takes raw material；Melting is carried out to raw material, obtains molten steel；
Step 2
Molten steel is cast, manganese sulfide precipitate average-size is directly produced less than 5 microns and Dispersed precipitate contains
Sulphur micro alloyed steel finished product；When casting, control cooling velocity is 2000-3000K/s.
Preferably, a kind of method of production energy-saving sulfur-bearing micro alloyed steel of the present invention carries out melting using induction furnace,
Obtain molten steel；The degree of superheat of the molten steel is 30~50 DEG C.Industrially in application, being heated and being melted using induction coil
Refining is carried out thermometric using infrared pyrometer, is regulated and controled using the power supply with PID controller to induction coil power.
Preferably, a kind of method of production energy-saving sulfur-bearing micro alloyed steel of the present invention, before casting, same furnace molten steel
Temperature difference is less than or equal to 5 DEG C.
Preferably, a kind of method of production energy-saving sulfur-bearing micro alloyed steel of the present invention, when casting, with cooling medium pair
Ingot casting is rapidly cooled；And recycle cooling medium；The cooling medium includes water.By the recycling of cooling medium, especially
The recycling and utilization of heat maximum possible are realized in the recycling of water, this is conducive to further energy conservation.
A kind of application of sulfur-bearing micro alloyed steel of the present invention, the application include being used as forging.The forging includes heat
Forging, cold forging part.Since the present invention controls the size of precipitate into casting process well, this is mentioned for cold forging
Having supplied may.This also provides advantageous guarantee for the energy conservation of subsequent technique.
A kind of application of sulfur-bearing micro alloyed steel of the present invention, the forging includes at least one of crankshaft, connecting rod.Above-mentioned forging
Part is not only simply possible to use on automobile, other Load-Carrying Equipments and engineering equipment can also use forging of the invention.
The thinking that the present invention uses traditional handicraft and new technology to combine using mature induction melting and is played quickly
The novel energy-conserving production technology that the special casting of Solidification Characteristics organically combines, can save the high heating of the subsequent energy consumption of traditional handicraft
Isothermal holding greatlys save electricity about, reduces production cost, and benefit is good.And manganese sulfide precipitation size in the product produced
It is not much different with distribution with traditional handicraft, cutting ability is also almost the same.
Specific embodiment
Embodiment 1
In the present embodiment, the step of sulfur-bearing micro alloyed steel production method, is as follows:
Step 1
The foraminate high purity quartz pipe of bottom belt is packed into the suitable raw material of chemical component and carries out induction melting, obtains ingredient
Specifically:
Fe-0.46C-0.35Si-0.71Mn-0.0075P-0.055S-0.022Nb-0.094V-0.034Ti-0.21Ni-
0.19Cr-0.014N in wt% sulfur-bearing micro alloyed steel molten steel (degree of superheat be 30 DEG C), the temperature amplitude of the molten steel are less than etc.
In 5 DEG C；
Step 2
Small hole at bottom part is directed at the cooling substrate of copper plane, cooling water is had in substrate, makes molten steel using high-purity argon gas
Liquid rapid fire is to substrate and solidifies (cooling velocity 2500K/s).Complete special casting process.Recycle cooling water.
The detected value of the manganese sulfide precipitation size average value of products obtained therefrom is shown in Table 1.
Products obtained therefrom can be directly used for being hot-forged；Being hot-forged products obtained therefrom is connecting rod and/or crankshaft.
Products obtained therefrom can be directly used for cold forging；The lower heat treatment of the laggard trip temperature of cold forging, products obtained therefrom be connecting rod and/or
Crankshaft.
Comparative example 1
This comparative example is compared with Example 1 compared with only with step one (the wherein condition used in step 1 in embodiment 1
Parameter is completely consistent with embodiment 1)
Second step is produced (cooling velocity is less than or equal to 50K/s) using conventional cast.And without subsequent long-time
Heating and isothermal holding.
The detected value of the manganese sulfide precipitation size average value of products obtained therefrom is shown in Table 1.
Comparative example 2
This comparative example is compared with Example 1 compared with only with step one (the wherein condition used in step 1 in embodiment 1
Parameter is completely consistent with embodiment 1)
Second step is produced (cooling velocity is less than or equal to 50K/s) using conventional cast.
Semi-finished product are carried out being heated to 1000K under argon gas protection, keep the temperature 8 hours, obtain final products by third step.
The detected value of the manganese sulfide precipitation size average value of products obtained therefrom is shown in Table 1.
Manganese sulfide precipitate average-size tests table in 1 product of table
| Average-size (μm) | |
| Embodiment 1 | 4.24 |
| Comparative example 1 | 13.83 |
| Comparative example 2 | 4.86 |
From upper table result it is found that contained manganese sulfide size is smaller in the product that the present invention produces, specifically with traditional high energy
Work consuming skill is not much different, and such as uses traditional handicraft, and saves subsequent high energy consumption heat preservation link, then in product manganese sulfide size compared with
Greatly, performance is obviously very poor.Illustrate that using this method be a kind of energy-efficient sulfur-bearing micro alloyed steel production method.
Embodiment 2
In the present embodiment, the step of sulfur-bearing micro alloyed steel production method, is as follows:
Step 1
The foraminate high purity quartz pipe of bottom belt is packed into the suitable raw material of chemical component and carries out induction melting, obtains ingredient
Specifically:
Fe-0.4C-0.2Si-0.6Mn-0.005P-0.04S-0.01Nb-0.08V-0.02Ti-0.11Ni-0.12Cr-
0.12N in wt% sulfur-bearing micro alloyed steel molten steel (degree of superheat is 40 DEG C), the temperature amplitude of the molten steel is less than or equal to 5 DEG C；
Step 2
Small hole at bottom part is directed at the cooling substrate of copper plane, cooling water is had in substrate, makes molten steel using high-purity argon gas
Liquid rapid fire is to substrate and solidifies (cooling velocity 2100K/s).Complete special casting process.Recycle cooling water.
The manganese sulfide precipitation size average value of products obtained therefrom is 4.6 microns.
Embodiment 3
In the present embodiment, the step of sulfur-bearing micro alloyed steel production method, is as follows:
Step 1
The foraminate high purity quartz pipe of bottom belt is packed into the suitable raw material of chemical component and carries out induction melting, obtains ingredient
Specifically:
Fe-0.6C-0.5Si-0.9Mn-0.008P-0.07S-0.03Nb-0.12V-0.05Ti-0.28Ni-0.25Cr-
0.18N in wt% sulfur-bearing micro alloyed steel molten steel (degree of superheat is 45 DEG C), the temperature amplitude of the molten steel is less than or equal to 5 DEG C；
Step 2
Small hole at bottom part is directed at the cooling substrate of copper plane, cooling water is had in substrate, makes molten steel using high-purity argon gas
Liquid rapid fire is to substrate and solidifies (cooling velocity 2800K/s).Complete special casting process.Recycle cooling water.
The manganese sulfide precipitation size average value of products obtained therefrom is 4.1 microns, while being nanometer phase in precipitate.
Products obtained therefrom can be directly used for being hot-forged；Being hot-forged products obtained therefrom is connecting rod and/or crankshaft.
Products obtained therefrom can be directly used for cold forging；The lower heat treatment of the laggard trip temperature of cold forging, products obtained therefrom be connecting rod and/or
Crankshaft.
Embodiment 4
In the present embodiment, the step of sulfur-bearing micro alloyed steel production method, is as follows:
Step 1
The foraminate high purity quartz pipe of bottom belt is packed into the suitable raw material of chemical component and carries out induction melting, obtains ingredient
Specifically:
Fe-0.48C-0.35Si-0.75Mn-0.008P-0.06S-0.02Nb-0.10V-0.035Ti-0.22Ni-
0.23Cr-0.16N in wt% sulfur-bearing micro alloyed steel molten steel (degree of superheat is 45 DEG C), the temperature amplitude of the molten steel is less than or equal to
5℃；
Step 2
Small hole at bottom part is directed at the cooling substrate of copper plane, cooling water is had in substrate, makes molten steel using high-purity argon gas
Liquid rapid fire is to substrate and solidifies (cooling velocity 2900K/s).Complete special casting process.Recycle cooling water.
The manganese sulfide precipitation size average value of products obtained therefrom is 4.0 microns, while being nanometer phase, nanometer in precipitate
The number of particle is more than embodiment 3.
Products obtained therefrom can be directly used for being hot-forged；Being hot-forged products obtained therefrom is connecting rod and/or crankshaft.
Products obtained therefrom can be directly used for cold forging；The lower heat treatment of the laggard trip temperature of cold forging, products obtained therefrom be connecting rod and/or
Crankshaft.
Claims (10)
1. a kind of sulfur-bearing micro alloyed steel, it is characterised in that: contain manganese sulfide precipitate in the sulfur-bearing micro alloyed steel；The vulcanization
The size of manganese precipitate is less than or equal to 5 microns；The manganese sulfide precipitate is directly precipitated in casting process.
2. a kind of sulfur-bearing micro alloyed steel according to claim 1, it is characterised in that: sulfur-bearing micro alloyed steel contain Fe, C, Si,
Mn、P、S、Nb、V、Ti、Ni、Cr、N。
3. a kind of sulfur-bearing micro alloyed steel according to claim 2, it is characterised in that；By percentage to the quality, the sulfur-bearing
Micro alloyed steel includes: C:0.4-0.6%, Si:0.2-0.5%, Mn:0.6-0.9%, P:0.005-0.01%, S:0.04-
0.07%, Nb:0.01-0.03%, V:0.08-0.12%, Ti:0.02-0.05%, Ni:0.1-0.3%, Cr:0.1-0.3%,
N:0.1-0.2%, Fe: surplus.
4. a kind of sulfur-bearing micro alloyed steel according to claim 3, it is characterised in that: by percentage to the quality, the sulfur-bearing
Micro alloyed steel includes: C:0.4-0.5%, Si:0.3-0.4%, Mn:0.7-0.8%, P:0.006-0.008%, S:0.05-
0.06%, Nb:0.015-0.025%, V:0.09-0.11%, Ti:0.03-0.04%, Ni:0.15-0.25%, Cr:0.15-
0.25%, N:0.12-0.18%, Fe: surplus.
5. a kind of method of production energy-saving sulfur-bearing micro alloyed steel as described in claim 1-4 any one, it is characterised in that；Including
Following step:
Step 1
Match by design component and takes raw material；Melting is carried out to raw material, obtains molten steel；
Step 2
Molten steel is cast, it is micro- less than the sulfur-bearing of 5 microns and Dispersed precipitate directly to produce manganese sulfide precipitate average-size
Steel alloy finished product；When casting, control cooling velocity is 2000-3000K/s.
6. a kind of method of production energy-saving sulfur-bearing micro alloyed steel according to claim 5；It is characterized by: using induction furnace
Melting is carried out, molten steel is obtained；The degree of superheat of the molten steel is 30~50 DEG C.
7. a kind of method of production energy-saving sulfur-bearing micro alloyed steel according to claim 5；It is characterized by: before casting, together
The temperature difference of one heat steel liquid is less than or equal to 5 DEG C.
8. a kind of method of production energy-saving sulfur-bearing micro alloyed steel according to claim 5；It is characterized by: being used when casting
Cooling medium is rapidly cooled ingot casting；And recycle cooling medium；The cooling medium includes water.
9. a kind of application of the sulfur-bearing micro alloyed steel as described in claim 1-4 any one, it is characterised in that: the application includes
It is used as forging.
10. a kind of application of sulfur-bearing micro alloyed steel according to claim 9, the forging include crankshaft, in connecting rod extremely
Few one kind.
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| CN201910070059.0A CN109609855B (en) | 2019-01-24 | 2019-01-24 | Sulfur-containing microalloyed steel and energy-saving production method and application thereof |
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| CN109609855B CN109609855B (en) | 2020-02-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550562A (en) * | 2003-05-09 | 2004-12-01 | ɽ�������Ƹ���ʽ���� | Free machining steel for machine structural use having improved chip disposability |
| JP2006291335A (en) * | 2005-04-14 | 2006-10-26 | Kobe Steel Ltd | Steel for case hardening having excellent high temperature carburizing characteristic and workability |
| CN107312908A (en) * | 2017-07-06 | 2017-11-03 | 北京科技大学 | Improve the metallurgical method of MnS inclusion morphologies in a kind of non-hardened and tempered steel |
-
2019
- 2019-01-24 CN CN201910070059.0A patent/CN109609855B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550562A (en) * | 2003-05-09 | 2004-12-01 | ɽ�������Ƹ���ʽ���� | Free machining steel for machine structural use having improved chip disposability |
| JP2006291335A (en) * | 2005-04-14 | 2006-10-26 | Kobe Steel Ltd | Steel for case hardening having excellent high temperature carburizing characteristic and workability |
| CN107312908A (en) * | 2017-07-06 | 2017-11-03 | 北京科技大学 | Improve the metallurgical method of MnS inclusion morphologies in a kind of non-hardened and tempered steel |
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