CN102766802A - Low-temperature high-nickel steel plate and production method thereof - Google Patents

Low-temperature high-nickel steel plate and production method thereof Download PDF

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Publication number
CN102766802A
CN102766802A CN2012102763431A CN201210276343A CN102766802A CN 102766802 A CN102766802 A CN 102766802A CN 2012102763431 A CN2012102763431 A CN 2012102763431A CN 201210276343 A CN201210276343 A CN 201210276343A CN 102766802 A CN102766802 A CN 102766802A
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China
Prior art keywords
steel plate
temperature
minutes
nickelic
rolling
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Pending
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CN2012102763431A
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Chinese (zh)
Inventor
孟传峰
崔天燮
刘东风
王育田
王彩焕
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Shanxi Taigang Stainless Steel Co Ltd
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Shanxi Taigang Stainless Steel Co Ltd
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Priority to CN2012102763431A priority Critical patent/CN102766802A/en
Publication of CN102766802A publication Critical patent/CN102766802A/en
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Abstract

The invention relates to a low-temperature high-nickel steel plate and a production method thereof. The low-temperature high-nickel steel plate comprises 0.03-0.05% of C, 0-0.35% of Si, 0.50-0.80% of Mn, 11.0-13.0% of Ni, not larger than 0.005% of P, not larger than 0.005% of S, 0.01-0.05% of Al, not larger than 0.0012% of O, not larger than 0.0035% of N, and the balance of Fe and unavoidable impurities. The production method includes: I, smelting in a vacuum induction furnace, and subjecting all materials to baking, drying, cleaning, smelting and casting to obtain round ingots; II, blanking to obtain blanks 40mm or 60mm in width, and coating with high-nickel oxide paint; III, rolling the blanks for 6-8 times, and keeping the final rolling at 750-800 DEG C; VI, performing heat treatment, quenching at 790-830 DEG C, holding the temperature for 20-40 minutes, performing water quenching, tempering at 580-640 DEG C, and holding the temperature for 60-90 minutes; and V, inspecting performances. The mechanical property acceptance rate of the low-temperature high-nickel steel plate reaches 100%.

Description

Nickelic steel plate of a kind of low temperature and method of manufacture thereof
Technical field
The present invention relates to nickelic steel plate of a kind of low temperature and method of manufacture thereof.
Background technology
Raising along with nickel content in the steel plate; Revolution (remnants) austenite content improves in the steel, and its low-temperature impact toughness is better, and thermal treatment process is more simple and convenient; The existing nickelic steel plate 9%Ni of low temperature mechanical property qualification rate is on the low side; Particularly a properties percent of pass is lower, for this reason, is necessary to research and develop 12%Ni Heat Treatment Of Steel technology, tissue and performance rule.
Summary of the invention
In order to overcome the above-mentioned deficiency of the existing nickelic steel plate of low temperature; The present invention provides a kind of low temperature nickelic steel plate, its ys ReH >=690-790MPa, tensile strength Rm >=720-850MPa; Unit elongation A >=20-25% ,-196 ℃ of ballistic work AKv are 130-280J; A kind of method of manufacture of this steel is provided simultaneously.
Because this product mechanical property requirements HS; High-ductility, H.T., good weldableness is so chemical composition design adopts the thinking of low-carbon (LC), middle manganese, an amount of niobium, titanium; Low-carbon (LC) is in order to ensure high plasticity, high toughness, good weldableness and processability.An amount of niobium, titanium micro-alloyedization are in order to improve the intensity of steel plate.
The quality per distribution ratio of the composition of the nickelic steel plate of this low temperature is:
C:0.03~0.05%, Si:0~0.35%, Mn:0.50~0.80%, Ni:11.0~13.0%,
P≤0.005%, S≤0.005%, Al:0.01~0.05%, O≤0.0012%,
N≤0.0035%, all the other are Fe and unavoidable impurities.
The ys ReH that it processes steel plate is 690~790MPa, and tensile strength Rm is 720~850 MPa, and unit elongation A is that 20~25% ,-196 ℃ of ballistic work AKv are 130-280J.
The flow process of the method for manufacture of the nickelic steel plate of this low temperature is:
Melting → ingot casting in raw material → surperficial milling (removing surface oxidation impurity) → oven dry (200 ℃) → 200Kg vacuum induction furnace (by existing specification ingot casting) → cutting stock → heating → rolling → thermal treatment → Performance Detection.
The method of manufacture of the nickelic steel plate of this low temperature comprises following sequential steps:
ISmelt
At nominal capacity is the vacuum induction furnace smelting of 200 ± 20Kg, and all raw material equal (raw material of smelting high-nickel steel plate mainly adopts the blank of 9%Ni steel to refine 12%Ni) is through baking, drying, cleaning and smelting; The chemical Composition Control of steel considers that by the middle limit of (will add a certain amount of alloy in the smelting) design mix the composition of molten steel reaches following requirement and is cast into billet:
C:0.03~0.04%, Si:0.15~0.25%, Mn:0.60~0.80%,
Ni:11.0~13.0%, P≤0.005%, S≤0.005%, Al:0.01~0.04%,
O≤0.0012%, N≤0.0035%, all the other are Fe and unavoidable impurities.
The gating system clean dry, the level and smooth no concave-convex of ingot mould inwall is uneven.
IIBlanking
Billet to Ф 160mm carries out across cutting, is cut into the blank that width is 40mm or 60mm, brushes anti-nickelic oxidation coating.
IIIRolling blank
Billet heating temperature was 1200 ± 20 ℃, adopts nitrogen protection, to temperature insulation 60~90 minutes.
Start rolling temperature >=1050 ℃-1080 ℃, rolling 6~8 passages, finishing temperature are 750~800 ℃.
VIThermal treatment process
790~830 ℃ of quenching temperatures, soaking time 20~40 minutes, shrend; 580 ℃~640 ℃ of tempering temperatures, soaking time 60~90 minutes is cooled off in air then.
VService check
Hardened and tempered steel plate is carried out tensile testing, and the ys ReH of steel plate is 690~790MPa, and tensile strength Rm is 720~850 MPa, and unit elongation A is 20~25% ,-196 ℃ of ballistic work AKv >=130-280J.
Beneficial effect of the present invention:
The nickelic steel plate of this low temperature is behind quenching+high tempering, and the ys ReH of steel plate is 690~790MPa, and tensile strength Rm is 720~850 MPa, and unit elongation A is that 20~25% ,-196 ℃ of ballistic work AKv are 130-280J, and the mechanical property qualification rate reaches 100%.
Embodiment
Specify embodiment of the present invention below in conjunction with embodiment, but embodiment of the present invention is not limited to following embodiment.
Steel plate embodiment one
The per-cent of the quality that the chemistry of this low temperature High Nickel Steel plate embodiment becomes is:
C:0.04%, Si:0.17%, Mn:0.65%, Ni:12.0%, P: 0.0025%,
S:0.005%, Al:0.035%, O:0.0006%, N:0.0017%,
All the other are Fe and unavoidable impurities.
Process the thick 6mm of steel plate, the ys ReH of steel plate is 730 MPa, and tensile strength Rm is 765 MPa, and unit elongation A is that 23% ,-196 ℃ of ballistic work AKv are 190J.
Method of manufacture embodiment one
The low temperature High Nickel Steel plate embodiment one that present embodiment is made.Present embodiment is a following sequential steps:
ISmelt
At nominal capacity is the vacuum induction furnace smelting of 200Kg, and all raw material (raw material of smelting high-nickel steel plate mainly adopts the blank of 9%Ni steel to refine 12%Ni) is all through baking, drying, cleaning and smelting; The chemical Composition Control of steel is pressed the middle limit of design mix and is considered that the composition of molten steel reaches following requirement and is cast into billet:
C:0.04%, Si:0.17%, Mn:0.65%, Ni:12.0%, P: 0.0025%,
S:0.005%, Al:0.035%, O:0.0006%, N:0.0017%,
All the other are Fe and unavoidable impurities.
The gating system clean dry, the level and smooth no concave-convex of ingot mould inwall is uneven;
IIBlanking
Ingot shape to Ф 160mm carries out across cutting, and being cut into width is the 40mm blank, and (being cut into rectangular bloom) carried out brushing preventing high temperature oxidation coating.
IIIRolling blank
Billet heating temperature was 1200 ℃, adopts nitrogen protection, to temperature insulation 60 minutes.1020 ℃ of start rolling temperatures, rolling 6 passages, finishing temperature are 750 ℃.
IVThermal treatment process
800 ℃ of quenching temperatures, soaking time 20 minutes, shrend; 600 ℃ of tempering temperatures, soaking time 60 minutes, air cooling.
VService check
Hardened and tempered steel plate is carried out tensile testing, and the ys ReH of steel plate is 730 MPa, and tensile strength Rm is 765 MPa, and unit elongation A is that 23% ,-196 ℃ of ballistic work AKv are 190J.
Steel plate embodiment two
The per-cent of the quality that the chemistry of this low temperature High Nickel Steel plate embodiment becomes is:
C:0.03%, Si: 0.25%, Mn:0.60%, Ni:11.5%,
P≤0.004%, S≤0.003%, Al: 0.03%, O:0.0011%,
N:0.0025%, all the other are Fe and unavoidable impurities.
Process the thick 12mm of steel plate; Hardened and tempered steel plate is carried out tensile testing, and steel plate ys ReH is 715 MPa, and tensile strength Rm is 750 MPa, and unit elongation A is that 24% ,-196 ℃ of ballistic work AKv are 220J.
Method of manufacture embodiment two
The low temperature High Nickel Steel plate embodiment two that present embodiment is made.Present embodiment is a following sequential steps:
ISmelt
At nominal capacity is the vacuum induction furnace smelting of 200Kg, and all raw material is all through baking, drying, cleaning and smelting; The chemical Composition Control of steel is pressed the middle limit of design mix and is considered that the composition of molten steel reaches following requirement and is cast into billet:
C:0.03%, Si: 0.25%, Mn:0.60%, Ni:11.5%,
P≤0.004%, S≤0.003%, Al: 0.03%, O:0.0011%,
N:0.0025%, all the other are Fe and unavoidable impurities.
The gating system clean dry, the level and smooth no concave-convex of ingot mould inwall is uneven
IIBlanking
Ingot shape to Ф 160mm carries out across cutting, and being cut into width is the 60mm blank, brushes anti-nickelic oxidation coating.
IIIRolling blank
Billet heating temperature was 1200 ℃, adopts nitrogen protection, to temperature insulation 80 minutes.
1040 ℃ of start rolling temperatures, rolling 7 passages, finishing temperature are 800 ℃.
IVThermal treatment process
800 ℃ of quenching temperatures, soaking time 30 minutes, shrend; 620 ℃ of tempering temperatures, soaking time 60 minutes, air cooling.
VService check
Hardened and tempered steel plate is carried out tensile testing, and steel plate ys ReH is 715 MPa, and tensile strength Rm is 750 MPa, and unit elongation A is that 24% ,-196 ℃ of ballistic work AKv are 220J.

Claims (3)

1. nickelic steel plate of low temperature, the quality per distribution ratio of its composition is:
C:0.03~0.05%, Si:0~0.35%, Mn:0.50~0.80%, Ni:11.0~13.0%,
P≤0.005%, S≤0.005%, Al:0.01~0.05%, O≤0.0012%,
N≤0.0035%, all the other are Fe and unavoidable impurities.
2. the nickelic steel plate of low temperature according to claim 1 is characterized in that: its ys ReH is 690~790MPa, and tensile strength Rm is 720~850 MPa, and unit elongation A is that 20~25% ,-196 ℃ of ballistic work AKv are 130-280J.
, the method for manufacture of the nickelic steel plate of a kind of low temperature, it comprises following sequential steps:
ISmelt
At nominal capacity is the vacuum induction furnace smelting of 200 ± 20Kg, and all raw material is all through baking, drying, cleaning and smelting; The chemical Composition Control of steel is pressed the middle limit of design mix and is considered that the composition of molten steel reaches following requirement and is cast into billet:
C:0.03~0.04%, Si:0.15~0.25%, Mn:0.60~0.80%,
Ni:11.0~13.0%, P≤0.005%, S≤0.005%, Al:0.01~0.04%,
O≤0.0012%, N≤0.0035%, all the other are Fe and unavoidable impurities;
The gating system clean dry, the level and smooth no concave-convex of ingot mould inwall is uneven;
IIBlanking
Billet to Ф 160mm carries out across cutting, is cut into the blank that width is 40mm or 60mm, brushes anti-nickelic oxidation coating;
IIIRolling blank
Billet heating temperature was 1200 ± 20 ℃, adopts nitrogen protection, to temperature insulation 60~90 minutes;
Start rolling temperature >=1050 ℃-1080 ℃, rolling 6~8 passages, finishing temperature are 750~800 ℃;
VIThermal treatment process
790~830 ℃ of quenching temperatures, soaking time 20~40 minutes, shrend; 580 ℃~640 ℃ of tempering temperatures, soaking time 60~90 minutes is cooled off in air then;
VService check
Hardened and tempered steel plate is carried out tensile testing, and the ys ReH of steel plate is 690~790MPa, and tensile strength Rm is 720~850 MPa, and unit elongation A is that 20~25% ,-196 ℃ of ballistic work AKv are 130-280J.
CN2012102763431A 2012-08-06 2012-08-06 Low-temperature high-nickel steel plate and production method thereof Pending CN102766802A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343202A (en) * 2013-07-11 2013-10-09 太原理工大学 Quenching/subzero treatment method for heat treatment of low-temperature nickel steel
JP2017197792A (en) * 2016-04-25 2017-11-02 新日鐵住金株式会社 Ni steel for liquid hydrogen
CN111247263A (en) * 2017-10-26 2020-06-05 日本制铁株式会社 Nickel-containing steel for low temperature use

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0941088A (en) * 1995-07-31 1997-02-10 Kawasaki Steel Corp Production of high toughness steel plate for low temperature use
CN102011048A (en) * 2010-09-29 2011-04-13 山西太钢不锈钢股份有限公司 Nickel-based low-temperature pressure vessel steel and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0941088A (en) * 1995-07-31 1997-02-10 Kawasaki Steel Corp Production of high toughness steel plate for low temperature use
CN102011048A (en) * 2010-09-29 2011-04-13 山西太钢不锈钢股份有限公司 Nickel-based low-temperature pressure vessel steel and manufacturing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343202A (en) * 2013-07-11 2013-10-09 太原理工大学 Quenching/subzero treatment method for heat treatment of low-temperature nickel steel
CN103343202B (en) * 2013-07-11 2015-10-28 太原理工大学 A kind of low temperature nickel Heat Treatment Of Steel quenching cryogenic treating process
JP2017197792A (en) * 2016-04-25 2017-11-02 新日鐵住金株式会社 Ni steel for liquid hydrogen
CN111247263A (en) * 2017-10-26 2020-06-05 日本制铁株式会社 Nickel-containing steel for low temperature use

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