CN109852882A - A kind of alloy structure 30MnB steel plate and its production method - Google Patents
A kind of alloy structure 30MnB steel plate and its production method Download PDFInfo
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- CN109852882A CN109852882A CN201910146482.4A CN201910146482A CN109852882A CN 109852882 A CN109852882 A CN 109852882A CN 201910146482 A CN201910146482 A CN 201910146482A CN 109852882 A CN109852882 A CN 109852882A
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Abstract
The invention discloses a kind of alloy structure 30MnB steel plates and its production method, the steel plate chemical component composition and its mass percentage are as follows: C:0.25-0.35%, Si:0.20-1.00%, Mn:1.10-1.80%, P≤0.020%, Cr≤0.30%, Ni≤0.30%, Cu≤0.30%, B:0.001-0.005%, surplus are Fe and inevitable impurity；The production method includes first refining, refining, continuous casting, heating, rolling process.The present invention is designed by middle carbon component, while B element is added, and can improve the compactness and hot rolling performance of steel, improves the intensity of steel plate, and the steel plate of production has the characteristics that steel is pure, consistency is high, quality is stable；Yield strength Rp0.2 >=350MPa, tensile strength Rm >=550MPa, elongation percentage A >=20%；Surface Brinell hardness≤230HB.
Description
Technical field
The invention belongs to iron and steel smelting technology fields, and in particular to a kind of alloy structure 30MnB steel plate and its producer
Method.
Background technique
30MnB steel is a kind of structural carbon steel of high intensity, and due to intensity with higher and harden ability, when cold deformation is moulded
Property is good, and weldability is medium, and machinability is good.It is mainly used for bolt, nut, screw, pull rod, small axis, braking machine gear.
Trace B, which is added in steel, can make the performance of steel that significant change occur, and the main function of boron is to improve harden ability, with
The continuous development of machinery industry, traditional steel plate, which is only required, meets standard performance criteria, still, with the needs of design, at present
Performance indicator is improved into especially tensile strength and improves nearly 20MPa, while the internal soundness of steel plate is required strictly, to force steel
Plate manufactory optimizes existing process, is just able to satisfy design needs, by controlling steel-making refining and vacuum process,
Ensure that internal quality of steel plate is excellent, while being controlled by steel rolling finish rolling roll control and subsequent stacking, can solve the above technology
Problem.
In conclusion a kind of alloy structure 30MnB steel plate is developed under the premise of guaranteeing steel plate excellent machinability,
Stable performance is effectively obtained, the demand in better commensurate structure steel market has important Social benefit and economic benefit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of alloy structure 30MnB steel plates and its production method.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of alloy structure 30MnB steel plate,
The steel plate chemical component composition and its mass percentage are as follows: C:0.25-0.35%, Si:0.20-1.00%, Mn:1.10-
1.80%, P≤0.020%, Cr≤0.30%, Ni≤0.30%, Cu≤0.30%, B:0.001-0.005%, surplus are Fe and can not keep away
The impurity exempted from.
Steel plate thickness of the present invention is 30~60mm.
Steel plate yield strength Rp0.2 >=350MPa of the present invention, tensile strength Rm >=550MPa, elongation percentage A >=20%；
Surface Brinell hardness≤230HB.
The present invention also provides a kind of alloy structure production method of 30MnB steel plate, the production method include just refining,
Refining, continuous casting, heating, rolling process；The refining procedure, the aluminum steel of refining initial stage feeding 0.9-1.1 ㎏/t steel, white slag are kept
Time 30-35min, the soft blow of vacuum later period argon gas 10-15min, catch time 15-25min；The rolling process controls finish rolling
Stage start rolling temperature >=910 DEG C, finishing temperature be 840-860 DEG C, it is air-cooled to roll rear steel plate.
It is of the present invention just to refine process, using converter smelting, big packet tapping control C:0.10-0.15%, big Bao Wendu
1550-1565 DEG C, tapping is avoided to see slag.
Continuous casting working procedure of the present invention, degree of superheat control is at 15-25 DEG C in continuous casting process, the offline stacking time 24- of steel billet
30h。
Heating process of the present invention, steel billet is in continuous stove heating, and 1230-1240 DEG C of soaking temperature, heating coefficient 8-
10min/cm。
Rolling process of the present invention, rolls the timely stacking of rear steel plate, and temperature control is at 400-450 DEG C to get arriving required thickness
The steel plate of degree.
The beneficial effects of adopting the technical scheme are that the 1, present invention is designed by middle carbon component, add simultaneously
Enter B element, the compactness and hot rolling performance of steel can be improved, improve the intensity of steel plate.2, the present invention is added by refining process
Aluminum steel guarantees further deoxidation effect；It preferably controls in steel and presss from both sides by soft blow time in vacuum later period and catch time control
Sundries etc. floats, and keeps the internal soundness of steel more excellent, ensure that the stability of later period plate property；Pass through finish rolling start rolling temperature
And the control of finishing temperature guarantees that steel plate has superperformance, carries out the warm stacking of band after rolling in time, prevents steel plate from bursting, guarantees
The good quality of steel plate.3, steel plate produced by the invention has the characteristics that steel is pure, consistency is high, quality is stable；Surrender is strong
Spend Rp0.2 >=350MPa, tensile strength Rm >=550MPa, elongation percentage A >=20%；Surface Brinell hardness≤230HB.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
The present embodiment alloy structure is 30mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.10%, 1550 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 0.9 ㎏/t steel aluminum steel, white slag retention time 30min, vacuum later period soft blow argon
Gas 10min, catch time 15min；
(3) continuous casting working procedure: degree of superheat control is at 15 DEG C in continuous casting process, and the steel billet offline stacking time is for 24 hours；
(4) heating process: steel billet is in continuous stove heating, and 1230 DEG C of soaking temperature, heating coefficient 8min/cm；
(5) rolling process: 910 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 840 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 400 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 2
The present embodiment alloy structure is 35mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.15%, 1565 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 1.1 ㎏/t steel aluminum steel, white slag retention time 35min, vacuum later period soft blow argon
Gas 15min, catch time 25min；
(3) continuous casting working procedure: degree of superheat control is at 25 DEG C in continuous casting process, the offline stacking time 30h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1240 DEG C of soaking temperature, heating coefficient 10min/cm；
(5) rolling process: 920 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 860 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 450 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 3
The present embodiment alloy structure is 46mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.12%, 1560 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 0.92 ㎏/t steel aluminum steel, white slag retention time 33min, vacuum later period soft blow argon
Gas 14min, catch time 20min；
(3) continuous casting working procedure: degree of superheat control is at 20 DEG C in continuous casting process, the offline stacking time 26h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1235 DEG C of soaking temperature, heating coefficient 9min/cm；
(5) rolling process: 925 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 850 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 430 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 4
The present embodiment alloy structure is 60mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.14%, 1563 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 0.95 ㎏/t steel aluminum steel, white slag retention time 34min, vacuum later period soft blow argon
Gas 14min, catch time 22min；
(3) continuous casting working procedure: degree of superheat control is at 23 DEG C in continuous casting process, the offline stacking time 29h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1238 DEG C of soaking temperature, heating coefficient 9.5min/cm；
(5) rolling process: 930 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 855 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 410 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 5
The present embodiment alloy structure is 42mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.13%, 1555 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 0.97 ㎏/t steel aluminum steel, white slag retention time 32min, vacuum later period soft blow argon
Gas 12min, catch time 17min；
(3) continuous casting working procedure: degree of superheat control is at 16 DEG C in continuous casting process, the offline stacking time 25h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1232 DEG C of soaking temperature, heating coefficient 8.5min/cm；
(5) rolling process: 915 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 845 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 420 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 6
The present embodiment alloy structure is 50mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.11%, 1552 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 1.02 ㎏/t steel aluminum steel, white slag retention time 31min, vacuum later period soft blow argon
Gas 11min, catch time 19min；
(3) continuous casting working procedure: degree of superheat control is at 19 DEG C in continuous casting process, the offline stacking time 27h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1234 DEG C of soaking temperature, heating coefficient 8.8min/cm；
(5) rolling process: 950 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 847 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 425 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 7
The present embodiment alloy structure is 55mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.10%, 1558 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 1.05 ㎏/t steel aluminum steel, white slag retention time 33min, vacuum later period soft blow argon
Gas 13min, catch time 24min；
(3) continuous casting working procedure: degree of superheat control is at 19 DEG C in continuous casting process, the offline stacking time 28h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1237 DEG C of soaking temperature, heating coefficient 9.2min/cm；
(5) rolling process: 935 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 857 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 435 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
Embodiment 8
The present embodiment alloy structure is 38mm with 30MnB steel plate thickness, and chemical component composition and mass percentage are shown in Table 1.
The production method of alloy structure 30MnB steel plate includes first refining, refining, continuous casting, heating, rolling process, specific work
That steps are as follows is described for skill:
(1) just refine process: using converter smelting, big packet tapping control C:0.15%, 1561 DEG C of big packet temperature avoids tapping from seeing slag；
(2) refining procedure: refining initial stage feeds 1.07 ㎏/t steel aluminum steel, white slag retention time 31min, vacuum later period soft blow argon
Gas 12min, catch time 18min；
(3) continuous casting working procedure: degree of superheat control is at 18 DEG C in continuous casting process, the offline stacking time 25h of steel billet；
(4) heating process: steel billet is in continuous stove heating, and 1236 DEG C of soaking temperature, heating coefficient 9.7min/cm；
(5) rolling process: 945 DEG C of finish rolling stage start rolling temperature of control, finishing temperature are 842 DEG C, and it is air-cooled to roll rear steel plate；Roll rear steel
The steel plate of required thickness is arrived in the timely stacking of plate, temperature control at 405 DEG C.
Alloy structure obtained by the present embodiment is shown in Table 2 with 30MnB mechanical property of steel plate.
1 embodiment 1-8 alloy structure of table is formed with 30MnB steel plate chemical component and its mass percentage (%)
| Embodiment | C | Si | Mn | P | Cr | Ni | Cu | B |
| 1 | 0.25 | 1.00 | 1.29 | 0.015 | 0.05 | 0.03 | 0.02 | 0.0010 |
| 2 | 0.35 | 0.20 | 1.80 | 0.016 | 0.02 | 0.03 | 0.03 | 0.0050 |
| 3 | 0.26 | 0.28 | 1.28 | 0.015 | 0.03 | 0.02 | 0.03 | 0.0024 |
| 4 | 0.26 | 0.27 | 1.30 | 0.014 | 0.02 | 0.02 | 0.03 | 0.0025 |
| 5 | 0.30 | 0.33 | 1.53 | 0.011 | 0.12 | 0.08 | 0.30 | 0.0034 |
| 6 | 0.28 | 0.72 | 1.69 | 0.018 | 0.17 | 0.30 | 0.06 | 0.0045 |
| 7 | 0.32 | 0.46 | 1.16 | 0.013 | 0.30 | 0.09 | 0.15 | 0.0017 |
| 8 | 0.34 | 0.88 | 1.10 | 0.020 | 0.21 | 0.18 | 0.24 | 0.0039 |
Ingredient surplus is Fe and inevitable impurity in table 1.
The mechanical property of 2 embodiment 1-8 alloy structure 30MnB steel plate of table
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to the present invention into
Go detailed description, those skilled in the art should understand that: it can still modify to the present invention or equally replace
It changes, without departing from the spirit or scope of the invention, or any substitutions, should all cover and be wanted in right of the invention
It asks in range.
Claims (8)
1. a kind of alloy structure 30MnB steel plate, which is characterized in that the steel plate chemical component composition and its mass percentage
Are as follows: C:0.25-0.35%, Si:0.20-1.00%, Mn:1.10-1.80%, P≤0.020%, Cr≤0.30%, Ni≤0.30%, Cu
≤ 0.30%, B:0.001-0.005%, surplus are Fe and inevitable impurity.
2. a kind of alloy structure 30MnB steel plate according to claim 1, which is characterized in that the steel plate thickness is 30
~60mm.
3. a kind of alloy structure 30MnB steel plate according to claim 1, which is characterized in that the steel plate yield strength
Rp0.2 >=350MPa, tensile strength Rm >=550MPa, elongation percentage A >=20%；Surface Brinell hardness≤230HB.
4. based on a kind of production method of alloy structure 30MnB steel plate described in claim 1-3 any one, feature exists
In the production method includes first refining, refining, continuous casting, heating, rolling process；The refining procedure, refining initial stage feed 0.9-
1.1 ㎏/t steel aluminum steel, white slag retention time 30-35min, the soft blow of vacuum later period argon gas 10-15min, catch time 15-
25min；The rolling process, control finish rolling stage start rolling temperature >=910 DEG C, finishing temperature are 840-860 DEG C, and it is empty to roll rear steel plate
It is cold.
5. a kind of production method of alloy structure 30MnB steel plate according to claim 4, which is characterized in that described first
Process is refined, using converter smelting, big packet tapping control C:0.10-0.15% is 1550-1565 DEG C of packet temperature big.
6. a kind of production method of alloy structure 30MnB steel plate according to claim 4, which is characterized in that the company
Foundry work sequence, degree of superheat control is at 15-25 DEG C in continuous casting process, the offline stacking time 24-30h of steel billet.
7. a kind of production method of alloy structure 30MnB steel plate, feature according to claim 4-6 any one exist
In, the heating process, steel billet is in continuous stove heating, and 1230-1240 DEG C of soaking temperature, heating coefficient 8-10min/cm.
8. a kind of production method of alloy structure 30MnB steel plate, feature according to claim 4-6 any one exist
In the rolling process rolls the timely stacking of rear steel plate, and the steel plate of required thickness is arrived in temperature control at 400-450 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846267A (en) * | 2021-09-24 | 2021-12-28 | 新余钢铁股份有限公司 | 30CrMnB hot-rolled alloy structural steel plate and production method thereof |
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| JP2002129285A (en) * | 2000-10-30 | 2002-05-09 | Nippon Steel Corp | Steel sheet with strain induced transformation type composite structure having excellent burring workability and its production method |
| CN102011057A (en) * | 2010-12-27 | 2011-04-13 | 承德建龙特殊钢有限公司 | CrMnTi series gear steel and processing technique thereof |
| CN107012393A (en) * | 2017-06-01 | 2017-08-04 | 山东寿光巨能特钢有限公司 | The production method of carbon chromium steel in a kind of inexpensive high-hardenability |
| CN107723595A (en) * | 2017-10-11 | 2018-02-23 | 舞阳钢铁有限责任公司 | A kind of engineering machinery 22SiMn2B steel plates and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002129285A (en) * | 2000-10-30 | 2002-05-09 | Nippon Steel Corp | Steel sheet with strain induced transformation type composite structure having excellent burring workability and its production method |
| CN102011057A (en) * | 2010-12-27 | 2011-04-13 | 承德建龙特殊钢有限公司 | CrMnTi series gear steel and processing technique thereof |
| CN107012393A (en) * | 2017-06-01 | 2017-08-04 | 山东寿光巨能特钢有限公司 | The production method of carbon chromium steel in a kind of inexpensive high-hardenability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113846267A (en) * | 2021-09-24 | 2021-12-28 | 新余钢铁股份有限公司 | 30CrMnB hot-rolled alloy structural steel plate and production method thereof |
| CN113846267B (en) * | 2021-09-24 | 2023-03-10 | 新余钢铁股份有限公司 | 30CrMnB hot-rolled alloy structural steel plate and production method thereof |
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