CN109161669A - A kind of production method of low delivery hardness high-performance chrome molybdenum steel plate - Google Patents
A kind of production method of low delivery hardness high-performance chrome molybdenum steel plate Download PDFInfo
- Publication number
- CN109161669A CN109161669A CN201811003375.8A CN201811003375A CN109161669A CN 109161669 A CN109161669 A CN 109161669A CN 201811003375 A CN201811003375 A CN 201811003375A CN 109161669 A CN109161669 A CN 109161669A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- production method
- chrome molybdenum
- temperature
- rolling
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
Abstract
The invention discloses a kind of production method of low delivery hardness high-performance chrome molybdenum steel plate, the production method includes smelting, rolling and heat treatment procedure；The smelting procedure is designed using the ingredient of low-carbon-equivalent, is improved the easy weldability of steel plate and is rolled conducive to steel plate；The rolling process includes control template rolling, and steel billet temperature≤820 DEG C band temperature is aligned after rolling, it is ensured that steel plate overall length camber≤10mm, thickness deviation is in -0.1~0.5mm；The heat treatment procedure controls the heat treatment process of cooling+high tempering using normalizing, it is ensured that guarantees that final template is good while plate property is excellent.The low delivery hardness high-performance chrome molybdenum steel plate of the present invention has good tensile property, lower delivery hardness and excellent template, high comprehensive performance, entirely appropriate straight seam welded pipe the designing and manufacturing with heat-resisting chrome molybdenum steel plate manufactured using techniques such as JCOE.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of producer of low delivery hardness high-performance chrome molybdenum steel plate
Method.
Background technique
The heat-resisting chrome molybdenum welded tube of vertical masonry joint manufactured using techniques such as JCOE, can be used as the ethylene of petrochemical industry, coal chemical technology
Multipurpose conveying pipe in device, oil refining apparatus.
It is higher and higher to the technical requirement of steel pipe with the transformation of petrochemical industry from size to strength, cause as vertical masonry joint
The raw material of heat-resisting chrome molybdenum welded tube --- the inside and outside quality of steel pipe chrome molybdenum steel plate further adds sternly, especially to the straightness of steel plate,
The type qualities such as camber and thickness deviation, and the obdurability matching to steel plate, weldability, easily roll performance and steel plate is any
Section hardness etc. proposes requirements at the higher level, has been unable to meet above-mentioned requirements using traditional manufacture merely.
Therefore exploitation has the production of good tensile property, lower delivery hardness and excellent template high-performance chrome-molybdenum steel
Method is of great significance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of production methods of low delivery hardness high-performance chrome molybdenum steel plate.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of low delivery hardness high-performance chrome molybdenum
The production method of steel plate, which is characterized in that the production method includes smelting, rolling and heat treatment procedure；The smelting procedure,
Carbon equivalent≤0.59%；The rolling process, using control template rolling；The heat treatment procedure, using normalizing control it is cooling+
High-temperature tempering process, 905~910 DEG C of normalizing temperature, 720~735 DEG C of tempering temperature.
Heat treatment procedure of the present invention is controlled using normalizing and is cooled down, and water-cool control is cooling after normalizing, and steel plate returns after water cooling
Red temperature≤200 DEG C.
Heat treatment procedure of the present invention, 905~910 DEG C of normalizing temperature, 2.4~2.5min/mm of normalizing soaking time；Just
Water-cool control is cooling after fire, steel plate red temperature≤200 DEG C after water cooling.
Heat treatment procedure of the present invention, 720~735 DEG C of tempering temperature, 2.5~2.8min/mm of tempering insulation time.
Rolling process of the present invention, using control template rolling, after rolling, steel billet temperature≤820 DEG C band temperature into
Row aligning, steel plate overall length camber≤10mm, thickness deviation is in -0.1~0.5mm.
The chrome molybdenum steel plate thickness of production method production of the present invention is 25.4~30.96mm.
Chrome molybdenum steel plate the yield strength Rp0.2 >=330MPa, tensile strength Rm:550 of production method production of the present invention
~690MPa；Steel plate arbitrary section through thickness hardness≤190HB；Whole plate unevenness≤8mm/m.
Low delivery hardness high-performance chrome molybdenum steel sheet product canonical reference ASME SA387 or the ASTM A387 of the present invention；Product
Tensile property detection method canonical reference ASTM A370 or ASME SA370, product hardness detection method canonical reference ASTM
E10 or ASTM A370 or ASME SA370.
The beneficial effects of adopting the technical scheme are that the 1, present invention is for steel pipe chrome-molybdenum steel using special
Point, is designed using the ingredient of low-carbon-equivalent, and innovation is optimized to the composition proportion of steel plate, controls carbon equivalent≤0.59%, into
One step improves the weldability of steel plate and rolls conducive to steel plate.2, in the operation of rolling of the present invention, making for strict control high pressure water is taken
With and rolling after the warm straightening process of band immediately, guarantee rolled plate template and steel plate thickness direction tissue it is uniform
Property, crystal grain deposit and good template basis are carried out for the subsequent heat treatment of steel plate.3, present invention heat treatment is using than usual low 5
~15 DEG C of normalizing process, steel plate abundant austenitizing before coming out of the stove, it is ensured that enter the uniformity of water front spring temperature；After steel plate enters water
By adjusting water ratio, water and roller speed control side wave；Accurate adjustment slit injector position, the height for quenching machine frame, with control
The horizontal wooden dipper of steel plate processed.4, after normalizing water-cool control of the present invention is cooling, steel plate red temperature≤200 DEG C, with addition of corresponding 720~
735 DEG C of high temperature long-time tempering process, it is ensured that plate property is good.5, chrome molybdenum steel plate yield strength Rp0.2 of the present invention >=
330MPa, tensile strength Rm:550~690MPa；Steel plate arbitrary section through thickness hardness≤190HB；Whole plate unevenness≤8mm/
m；With good tensile property, lower delivery hardness and excellent template, high comprehensive performance is entirely appropriate to use JCOE
Etc. techniques manufacture straight seam welded pipe designing and manufacturing with heat-resisting chrome molybdenum steel plate.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
The present embodiment low delivery hardness high-performance chrome-molybdenum steel slab kind A387Gr11CL2, steel plate thickness 25.4mm, production method
Including smelting, rolling and heat treatment procedure, specific process step is as described below:
(1) it smelting procedure: is designed using the ingredient of low-carbon-equivalent, optimizes the composition proportion of steel plate, control carbon equivalent 0.59%, smelting
Slab is cast into after refining；
(2) rolling process: using control template rolling, 820 DEG C of band temperature of steel billet temperature are aligned after rolling, steel plate overall length
Camber 10mm, thickness deviation 0.5mm；
(3) heat treatment procedure: using normalizing control cooling+high-temperature tempering process, 905 DEG C of normalizing temperature, normalizing soaking time
2.5min/mm, water-cool control is cooling after normalizing, 200 DEG C of steel plate red temperature after water cooling；720 DEG C of tempering temperature, when tempering is kept the temperature
Between 2.8min/mm.
The low delivery hardness high-performance chrome molybdenum steel plate unevenness 8mm/m of the present embodiment；Mechanical property: yield strength Rp0.2:
380MPa, tensile strength Rm:690MPa；Steel plate arbitrary section through thickness hardness: 190HB.
Embodiment 2
The present embodiment low delivery hardness high-performance chrome-molybdenum steel slab kind SA387Gr11CL2, steel plate thickness 28.58mm, producer
Method includes that smelting, rolling and heat treatment procedure, specific process step are as described below:
(1) it smelting procedure: is designed using the ingredient of low-carbon-equivalent, optimizes the composition proportion of steel plate, control carbon equivalent 0.57%, smelting
Slab is cast into after refining；
(2) rolling process: using control template rolling, 817 DEG C of band temperature of steel billet temperature are aligned after rolling, steel plate overall length
Camber 9mm, thickness deviation 0mm；
(3) heat treatment procedure: using normalizing control cooling+high-temperature tempering process, 907 DEG C of normalizing temperature, normalizing soaking time
2.45min/mm, water-cool control is cooling after normalizing, 190 DEG C of steel plate red temperature after water cooling；728 DEG C of tempering temperature, tempering heat preservation
Time 2.6min/mm.
The low delivery hardness high-performance chrome molybdenum steel plate unevenness 7mm/m of the present embodiment；Mechanical property: yield strength Rp0.2:
350MPa, tensile strength Rm:639MPa；Steel plate arbitrary section through thickness hardness: 185HB.
Embodiment 3
The present embodiment low delivery hardness high-performance chrome-molybdenum steel slab kind ASTM A387MGr.11Cl.2, steel plate thickness 30.96mm,
Its production method includes that smelting, rolling and heat treatment procedure, specific process step are as described below:
(1) it smelting procedure: is designed using the ingredient of low-carbon-equivalent, optimizes the composition proportion of steel plate, control carbon equivalent 0.58%, smelting
Slab is cast into after refining；
(2) rolling process: using control template rolling, 815 DEG C of band temperature of steel billet temperature are aligned after rolling, steel plate overall length
Camber 8mm, thickness deviation -0.1mm；
(3) heat treatment procedure: using normalizing control cooling+high-temperature tempering process, 910 DEG C of normalizing temperature, normalizing soaking time
2.4min/mm, water-cool control is cooling after normalizing, 180 DEG C of steel plate red temperature after water cooling；735 DEG C of tempering temperature, when tempering is kept the temperature
Between 2.5min/mm.
The low delivery hardness high-performance chrome molybdenum steel plate unevenness 6mm/m of the present embodiment；Mechanical property: yield strength Rp0.2:
347MPa, tensile strength Rm:550MPa；Steel plate arbitrary section through thickness hardness: 176HB.
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 this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (7)
1. a kind of production method of low delivery hardness high-performance chrome molybdenum steel plate, which is characterized in that the production method include smelt,
Rolling and heat treatment procedure；The smelting procedure, carbon equivalent≤0.59%；The rolling process, using control template rolling；Institute
State heat treatment procedure, using normalizing control cooling+high-temperature tempering process, 905~910 DEG C of normalizing temperature, tempering temperature 720~
735℃。
2. the production method of the low hardness high-performance chrome molybdenum steel plate of delivering goods of one kind according to claim 1, which is characterized in that institute
Heat treatment procedure is stated, is controlled and is cooled down using normalizing, water-cool control is cooling after normalizing, steel plate red temperature≤200 DEG C after water cooling.
3. the production method of the low hardness high-performance chrome molybdenum steel plate of delivering goods of one kind according to claim 1, which is characterized in that institute
State heat treatment procedure, 905~910 DEG C of normalizing temperature, 2.4~2.5min/mm of normalizing soaking time；Water-cool control is cold after normalizing
But, steel plate red temperature≤200 DEG C after water cooling.
4. the production method of the low hardness high-performance chrome molybdenum steel plate of delivering goods of one kind according to claim 1, which is characterized in that institute
State heat treatment procedure, 720~735 DEG C of tempering temperature, 2.5~2.8min/mm of tempering insulation time.
5. the production method of the low hardness high-performance chrome molybdenum steel plate of delivering goods of one kind according to claim 1, which is characterized in that institute
Rolling process is stated, using control template rolling, after rolling, steel billet temperature≤820 DEG C band temperature is aligned, steel plate overall length sickle
Knife is curved≤10mm, thickness deviation is in -0.1~0.5mm.
6. the production method of the low delivery hardness high-performance chrome molybdenum steel plate of one kind described in -5 any one according to claim 1,
It is characterized in that, the chrome molybdenum steel plate thickness of the production method production is 25.4~30.96mm.
7. the production method of the low delivery hardness high-performance chrome molybdenum steel plate of one kind described in -5 any one according to claim 1,
It is characterized in that, chrome molybdenum steel plate the yield strength Rp0.2 >=330MPa, tensile strength Rm:550 that the production method produces~
690MPa；Steel plate arbitrary section through thickness hardness≤190HB；Whole plate unevenness≤8mm/m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003375.8A CN109161669A (en) | 2018-08-30 | 2018-08-30 | A kind of production method of low delivery hardness high-performance chrome molybdenum steel plate |
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| CN201811003375.8A CN109161669A (en) | 2018-08-30 | 2018-08-30 | A kind of production method of low delivery hardness high-performance chrome molybdenum steel plate |
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| CN201811003375.8A Pending CN109161669A (en) | 2018-08-30 | 2018-08-30 | A kind of production method of low delivery hardness high-performance chrome molybdenum steel plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109722509A (en) * | 2019-01-28 | 2019-05-07 | 舞阳钢铁有限责任公司 | Reduce 12Cr2Mo1R steel plate normalizing+tempering state surface hardness method |
| CN110551879A (en) * | 2019-09-19 | 2019-12-10 | 舞阳钢铁有限责任公司 | Production method of low-strength-level Cr-Mo steel plate |
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| CN110551879B (en) * | 2019-09-19 | 2021-06-22 | 舞阳钢铁有限责任公司 | Production method of low-strength-level Cr-Mo steel plate |
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Application publication date: 20190108 |