CN108486496A - A kind of cooling controlling and rolling controlling process method of Ti-Zr-Mo combined microalloyings steel fine austenite grain - Google Patents
A kind of cooling controlling and rolling controlling process method of Ti-Zr-Mo combined microalloyings steel fine austenite grain Download PDFInfo
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- CN108486496A CN108486496A CN201810204975.4A CN201810204975A CN108486496A CN 108486496 A CN108486496 A CN 108486496A CN 201810204975 A CN201810204975 A CN 201810204975A CN 108486496 A CN108486496 A CN 108486496A
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- 229910001566 austenite Inorganic materials 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 title claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000001953 recrystallisation Methods 0.000 abstract description 12
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000742 Microalloyed steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001960 triggered effect Effects 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A kind of cooling controlling and rolling controlling process method of Ti Zr Mo combined microalloyings steel fine austenite grain, use Ti contents for 0.01~0.5%, Zr contents are that 0.01~0.5%, Mo contents are 0.01~0.5%, the Ti Zr Mo combined microalloying steel that C content is 0.01~0.5%.Above-mentioned Ti Zr Mo combined microalloying steel is heated to 1150~1250 DEG C, and keeps the temperature 300s, is then cooled to 1000~1100 DEG C of first passes of beginning, 1~10s of strain rate‑1, drafts 35%.After being spaced 1~10s, the second passes are carried out, rolling parameter is：1~10s of strain rate‑1, drafts 30%.After being spaced 1~10s, third passes are carried out, rolling parameter is：1~10s of strain rate‑1, drafts 20%.Finishing temperature control is at 1000 DEG C or more, and rapid water-spraying control is to room temperature after 1~50s.The method of the present invention inspires multiple complete austenite recrystallization through three passes, and crystallite dimension refine to 7~15 μm from 100 μm, obtains uniform fine austenitic grain structure.
Description
Technical field
The invention belongs to technical field of steel rolling, more particularly to a kind of Ti-Zr-Mo combined microalloyings steel fine Ovshinsky
The cooling controlling and rolling controlling process method of body crystal grain.
Background technology
Refined crystalline strengthening be it is unique it is a kind of can be improved again while improving the strength of materials material plasticity, toughness method, because
And the hot spot of concern always is for the research of crystal grain thinning.The original austenite grains degree of Ti (titanium) micro alloyed steel is to steel
Yield strength, toughness and plasticity of material etc. have a significant impact, thus how the grain size for controlling austenite in rolling sequence has
Critically important meaning.
Currently, the method that various countries' researcher develops a variety of crystal grain thinnings in laboratory conditions, such as isometrical angle
It squeezes, accumulation the methods of ply rolling and high pressure torsion, but due to the large strain required by this kind of method, limits it in reality
Further applying in production.From the point of view of commercial Application, the feasible way of crystal grain thinning is exactly to be existed by the controlled rolling stage
Austenite recrystallization area carries out light reduction, the deformation of big strain rate promotes multiple austenite recrystallization, and with deformation induced analysis
The TiC (titanium carbide) gone out can be combined with the effect of pinning austenite grain boundary, to obtain tiny austenite recrystallization crystal grain.Zr
(zirconium) can promote the precipitation of TiC, refine the size of precipitated phase.Mo (molybdenum) can inhibit the disappearance of dislocation under high temperature, increase
The density of dislocation provides more nucleation sites for TiC.In view of this, the present invention proposes a kind of compound micro- conjunctions of Ti-Zr-Mo
The cooling controlling and rolling controlling process method of aurification steel fine austenite grain.
Invention content
The present invention provides a kind of cooling controlling and rolling controlling process of Ti-Zr-Mo combined microalloyings steel fine austenite grain
Method.The present invention by the combination rolling of the designing of alloying component, different drafts and differently strained rate, control each road and take second place
Between membership credentials and austenite recrystallization process, to obtain uniformly tiny austenitic grain structure.
A kind of cooling controlling and rolling controlling process method of Ti-Zr-Mo combined microalloyings steel fine austenite grain of the present invention
It is as follows：
1. the present invention use Ti contents for 0.01~0.5%, Zr contents be 0.01~0.5%, Mo contents be 0.01~
0.5%, the Ti-Zr-Mo combined microalloying steel that C content is 0.01~0.5%.
2. the Ti-Zr-Mo combined microalloyings steel is heated to 1150~1250 DEG C, and 300s is kept the temperature, and postcooling
To 1000~1100 DEG C of first passes of beginning, the first passage rolling parameter is：1~10s of strain rate-1, drafts 35%；
3. after being spaced 1~10s, carrying out the second passes, the second passage rolling parameter is：1~10s of strain rate-1, pressure
Lower amount 30%.
4. after being spaced 1~10s, carrying out third passes, third passes parameter is：1~10s of strain rate-1, pressure
Lower amount 20%.
5. finishing temperature control is at 1000 DEG C or more, rapid water-spraying control is kept the temperature after 1~50s to room temperature.
The technological principle of above-mentioned process program and then is triggered multiple by multiple different drafts and differently strained rate
Austenite recrystallization, and combine it is deformation induced go out TiC, to prevent recrystallization austenite from growing up so that austenite grain obtains
To abundant fine.
The present invention has the following advantages that compared with prior art：
1. by the control of drafts, strain rate, temperature and passage interval time in rolling process, austenite is made to reach
While to homogenization, and fine austenite grain.
Rolling of the 2.Ti-Zr-Mo combined microalloyings steel through three passage difference drafts, differently strained rate, inspires more
Secondary complete austenite recrystallization, makes austenite grain size refine to 7~15 μm from 100 μm, has significantly refined austenite grain
Size.
Description of the drawings
Fig. 1 is the Ti-Zr-Mo combined microalloying steel austenitic grain structure patterns not rolled；
Fig. 2 is Ti-Zr-Mo combined microalloying steel austenitic grain structure pattern of the present invention after three passes.
Specific implementation mode
By Ti-Zr-Mo combined microalloying steel, 1200 DEG C are heated to, and keep the temperature 300s, are then cooled to 1050 DEG C of beginnings
First passes, strain rate 10s-1, drafts 35%.After being spaced 10s, the second passes, the second passes are carried out
Parameter is：Strain rate 10s-1, drafts 30%.After being spaced 10s, third passes are carried out, third passes parameter is：
Strain rate 5s-1, drafts 20%.Finishing temperature control keeps the temperature after 30s rapid water-spraying control to room temperature at 1000 DEG C or more.
The average grain size obtained through above-mentioned three passes is about 10 μm (as shown in Figure 2), with non-rolling structure (such as Fig. 1 institutes
Show) it compares, crystal grain is significantly refined.
Wherein, Ti-Zr-Mo combined microalloyings composition of steel is preferably：Ti contents are that 0.01~0.5%, Zr contents are
0.01~0.5%, Mo content are that 0.01~0.5%, C (carbon) content is 0.01~0.5%.Ingredient is more preferably：Ti contains
It is 0.05%, Mo contents is 0.05% that amount, which is 0.1%, Zr contents, C content 0.05%.
Herein, the shape of Ti-Zr-Mo combined microalloying steel is not limited, such as round, square steel billets.
It should be noted that heating equipment for example can be heating furnace, rolling equipment for example can be that four-roller Stand Mill rolls
Machine.
Since Zr can reduce the red brittleness of Ti-Zr-Mo combined microalloying steel, allow its hot stage carry out compared with
Big deformation provides sufficient energy for austenite recrystallization to obtain more deformation energy storage.It is compound to Ti-Zr-Mo micro-
Alloying steel carries out different drafts, differently strained rate deformation in austenite recrystallization area so that it is complete during the rolling process
At the recrystallization of multiple austenite, and the effect of the TiC energy pinning austenite grain boundaries of deformation-induced precipitation is combined, it can be effective
Prevent growing up for recrystallization austenite, the size of fining austenite grains.Meanwhile Mo can inhibit the disappearance of dislocation under high temperature,
The density for increasing dislocation provides more precipitation positions for TiC.Zr can promote the precipitation of TiC again, and refine precipitated phase
Size.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (1)
1. a kind of cooling controlling and rolling controlling process method of Ti-Zr-Mo combined microalloyings steel fine austenite grain, feature exist
In：
1) it be 0.01~0.5%, Mo contents is 0.01~0.5% that provide Ti contents, which be 0.01~0.5%, Zr contents, and C content is
0.01~0.5% Ti-Zr-Mo combined microalloying steel；
2) the Ti-Zr-Mo combined microalloyings steel is heated to 1150~1250 DEG C, and keeps the temperature 300s, be then cooled to
1000~1100 DEG C of first passes of beginning, the first passage rolling parameter are：1~10s of strain rate-1, drafts 35%；
3) after being spaced 1~10s, the second passes are carried out, the second passage rolling parameter is：1~10s of strain rate-1, drafts
30%；
4) after being spaced 1~10s, third passes are carried out, third passes parameter is：1~10s of strain rate-1, drafts
20%；
5) finishing temperature control is at 1000 DEG C or more, keeps the temperature after 1~50s rapid water-spraying control to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204975.4A CN108486496B (en) | 2018-03-13 | 2018-03-13 | Controlled rolling and controlled cooling process method for superfine austenite grains of Ti-Zr-Mo composite microalloyed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204975.4A CN108486496B (en) | 2018-03-13 | 2018-03-13 | Controlled rolling and controlled cooling process method for superfine austenite grains of Ti-Zr-Mo composite microalloyed steel |
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| Publication Number | Publication Date |
|---|---|
| CN108486496A true CN108486496A (en) | 2018-09-04 |
| CN108486496B CN108486496B (en) | 2020-11-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487063A (en) * | 2018-12-21 | 2019-03-19 | 昆明理工大学 | A kind of cooling controlling and rolling controlling process of Ti-V-N combined microalloying nano-particle reinforcement mild steel |
| CN109772907A (en) * | 2019-01-22 | 2019-05-21 | 江苏飞达环保科技有限公司 | A kind of uniform cooling means improving steel yield strength |
| CN109825756A (en) * | 2019-03-11 | 2019-05-31 | 昆明理工大学 | A kind of preparation method of high-wear-resistant alloy Steel material |
| CN110885925A (en) * | 2019-12-18 | 2020-03-17 | 昆明理工大学 | Method for micronizing Ti microalloyed low-carbon steel grains |
| CN113913714A (en) * | 2020-07-08 | 2022-01-11 | 中南大学 | Method for refining TC18 titanium alloy beta grains by adopting stepped strain rate forging process |
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2018
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487063A (en) * | 2018-12-21 | 2019-03-19 | 昆明理工大学 | A kind of cooling controlling and rolling controlling process of Ti-V-N combined microalloying nano-particle reinforcement mild steel |
| CN109487063B (en) * | 2018-12-21 | 2020-08-11 | 昆明理工大学 | Controlled rolling and controlled cooling process for Ti-V-N composite microalloyed nano-particle reinforced low-carbon steel |
| CN109772907A (en) * | 2019-01-22 | 2019-05-21 | 江苏飞达环保科技有限公司 | A kind of uniform cooling means improving steel yield strength |
| CN109825756A (en) * | 2019-03-11 | 2019-05-31 | 昆明理工大学 | A kind of preparation method of high-wear-resistant alloy Steel material |
| CN110885925A (en) * | 2019-12-18 | 2020-03-17 | 昆明理工大学 | Method for micronizing Ti microalloyed low-carbon steel grains |
| CN113913714A (en) * | 2020-07-08 | 2022-01-11 | 中南大学 | Method for refining TC18 titanium alloy beta grains by adopting stepped strain rate forging process |
| CN113913714B (en) * | 2020-07-08 | 2022-06-24 | 中南大学 | Method for refining TC18 titanium alloy beta grains by adopting stepped strain rate forging process |
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