CN105506493B - A kind of production method of ultra-thin SA738Gr B steel plates - Google Patents
A kind of production method of ultra-thin SA738Gr B steel plates Download PDFInfo
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- CN105506493B CN105506493B CN201410497871.9A CN201410497871A CN105506493B CN 105506493 B CN105506493 B CN 105506493B CN 201410497871 A CN201410497871 A CN 201410497871A CN 105506493 B CN105506493 B CN 105506493B
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- Prior art keywords
- sa738gr
- steel plates
- production method
- cogging
- temperature
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims description 4
- 230000000171 quenching Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 239000003607 modifier Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 carbon manganese silicon Chemical compound 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
Abstract
The present invention relates to a kind of production method of ultra-thin SA738Gr B steel plates, steel plate includes C0.1%~0.2%, Si0.15%~0.37%, Mn1.0%~1.7%, Cr≤0.5%, V≤0.02% by weight, and remaining is Fe and inevitable impurity;Comprise the following steps that:1) cogging:By 300mm blanks using the big pressure cogging of high temperature to 100~130mm of thickness, 1200 ± 30 DEG C of start rolling temperature, 10%≤reduction ratio≤30%;2) roll:Heat again, start rolling temperature >=1000 DEG C, 10%≤reduction ratio≤30%;3) it is heat-treated:Using modifier treatment.It is an advantage of the invention that:By this production method, most minimal thickness 10mm SA738Gr B steel plates are produced, plate property also complies with performance standard.
Description
Technical field
The present invention relates to a kind of production method of ultra-thin SA738Gr B steel plates.
Background technology
SA738Gr B steel plates are middle low temperature carbon manganese silicon steel plates, are usually used in nuclear island level steel plate on nuclear power engineering, surrender and anti-
Tensile strength is higher, and >=415Mpa is typically wanted in surrender, and tension examines less than -18 DEG C low-temperature impacts in 585~700Mpa, modulates state
Delivery.At present, the midium-carbon steel SA738Gr B thickness specifications produced both at home and abroad are more than 20mm mostly, and thickness is given birth to less than 20mm
Production difficulty is very big, and it is qualified that plate shape, performance are difficult.
The content of the invention
To overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of producer of ultra-thin SA738Gr B steel plates
Method, the SA738Gr B steel plates that the thickness that production meets performance standard is 10mm-20mm.
To achieve the above object, the present invention is achieved through the following technical solutions:
A kind of production method of ultra-thin SA738Gr B steel plates, process route is cogging → rolling → heat treatment, and steel plate is by weight
Gauge includes C0.1%~0.2%, Si0.15%~0.37%, Mn1.0%~1.7%, Cr≤0.5%, V≤0.02%, its
Remaining is Fe and inevitable impurity;Specifically include following processing step:
1) cogging:By 300mm blanks using the big pressure cogging of high temperature to 100~130mm of thickness, start rolling temperature 1200 ± 30
DEG C, 10%≤reduction ratio≤30%;
2) roll:Thickness is heated again for 100~130mm middle base, start rolling temperature >=1000 DEG C, 10%≤reduction ratio
≤ 30%;
3) it is heat-treated:Using modifier treatment, 915-925 DEG C of quenching and preserving heat temperature, in 1.5~2.5min/mm of stove total time,
590~610 DEG C of holding temperature is tempered, in 4~6min/mm of stove total time.
Compared with prior art, the beneficial effects of the invention are as follows:
By this production method, most minimal thickness 10mm SA738Gr B steel plates are produced, plate property also complies with performance
Standard.
Embodiment
The present invention is described in detail below, it should be noted that the implementation of the present invention is not limited to following embodiment party
Formula.
The production method of ultra-thin SA738Gr B steel plates, process route is cogging → rolling → heat treatment, and steel plate is by weight
Comprising C0.1%~0.2%, Si0.15%~0.37%, Mn1.0%~1.7%, Cr≤0.5%, V≤0.02%, remaining is
Fe and inevitable impurity;Specifically include following processing step:
1) cogging:1200-1250 DEG C of start rolling temperature, 10%≤reduction ratio≤30%, cogging to 100~130mm of thickness;
2) roll:Thickness is heated again for 100~130mm middle base, start rolling temperature palpus >=1000 DEG C, 10%≤pressure
Rate≤30%;
3) it is heat-treated:Using modifier treatment, 915-925 DEG C of quenching and preserving heat temperature, in stove total time 1.5-2.5min/mm,
590~610 DEG C of holding temperature is tempered, in stove total time 4-6min/mm.
Embodiment:
Steel plate essential element comprising C0.15%~0.15%, Si0.2%~0.3%, Mn1.2%~1.5%, Cr≤
0.4%, V≤0.015%, remaining is Fe and inevitable impurity, specifically includes following steps:
1) cogging:By 300mm blanks using the big pressure cogging of high temperature to thickness 100mm, 1200 DEG C of start rolling temperature, 10%≤
Reduction ratio≤25%;
2) roll:Base is heated again in the middle of 100mm, start rolling temperature palpus >=1000 DEG C, 10%≤reduction ratio≤25%;
3) it is heat-treated:Using quenched, 920 DEG C of quenching and preserving heat temperature, in stove total time 2min/mm, tempering insulation time 600
DEG C, in stove total time 5min/mm;
By this production method, most minimal thickness 10mm SA738Gr B steel plates are produced, plate property also complies with performance
Standard, specific performance such as following table:
The present invention produces most minimal thickness 10mm SA738Gr B steel plates, plate property is also accorded with by this production method
Close performance standard.
Claims (1)
1. a kind of production method of ultra-thin SA738Gr B steel plates, it is characterised in that
Steel plate by weight include C 0.15%, Si 0.2%~0.3%, Mn 1.2%~1.5%, Cr≤0.4%, V≤
0.015%, remaining is Fe and inevitable impurity, specifically includes following steps:
1) cogging:By 300mm blanks using the big pressure cogging of high temperature to thickness 100mm, 1200 DEG C of start rolling temperature, 10%≤pressure
Rate≤25%;
2) roll:Base is heated again in the middle of 100mm, start rolling temperature palpus >=1000 DEG C, 10%≤reduction ratio≤25%;
3) it is heat-treated:Using quenched, 920 DEG C of quenching and preserving heat temperature, in stove total time 2min/mm, 600 DEG C of tempering insulation time,
In stove total time 5min/mm;
Most minimal thickness 10mm SA738Gr B steel plates are produced, plate property also complies with performance standard, and specific performance is as follows:Formula
Sample is in HTTP states, room temperature tensile properties:Yield strength 475MPa, tensile strength 630MPa, elongation percentage 29.4%, 0 DEG C of summer
It is 210J, 190J, 188J than V-arrangement impact, grain size is 8 grades;Style is in HTTP+SPWHT states, room temperature tensile properties:Bend
Take intensity 450MPa, tensile strength 620MPa, elongation percentage 29.8%, 0 DEG C of Charpy V-arrangement impact is 228J, 186J, 211J.
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CN201410497871.9A CN105506493B (en) | 2014-09-25 | 2014-09-25 | A kind of production method of ultra-thin SA738Gr B steel plates |
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CN105506493A CN105506493A (en) | 2016-04-20 |
CN105506493B true CN105506493B (en) | 2017-09-29 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107365943A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | The production method of AP1000 nuclear power projects SA-533Ty.BCl.1 steel plates |
CN110791712A (en) * | 2019-11-15 | 2020-02-14 | 南京钢铁股份有限公司 | SA738GrB steel plate for nuclear power station containment vessel and manufacturing method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102181804A (en) * | 2011-05-16 | 2011-09-14 | 舞阳钢铁有限责任公司 | Steel plate for Class I nuclear key equipment and manufacturing method thereof |
CN102766805A (en) * | 2012-07-30 | 2012-11-07 | 宝山钢铁股份有限公司 | Thick steel plate for nuclear power plant containment and manufacture method thereof |
CN102776441A (en) * | 2012-08-10 | 2012-11-14 | 济钢集团有限公司 | Steel plate for third-generation nuclear power station reactor containments and manufacturing method thereof |
-
2014
- 2014-09-25 CN CN201410497871.9A patent/CN105506493B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102181804A (en) * | 2011-05-16 | 2011-09-14 | 舞阳钢铁有限责任公司 | Steel plate for Class I nuclear key equipment and manufacturing method thereof |
CN102766805A (en) * | 2012-07-30 | 2012-11-07 | 宝山钢铁股份有限公司 | Thick steel plate for nuclear power plant containment and manufacture method thereof |
CN102776441A (en) * | 2012-08-10 | 2012-11-14 | 济钢集团有限公司 | Steel plate for third-generation nuclear power station reactor containments and manufacturing method thereof |
Non-Patent Citations (4)
Title |
---|
AP1000安全壳钢板的性能特点及其批量化生产;陈敏,田洪志;《热加工工艺》;20140131;第43卷(第2期);第96-98页 * |
Latest Progress of Low-Alloy High-Strength Steels in Baosteel;Lu Jiang-xin;《Journal of Iron and Steel Research,International》;20110515(第S1期);第72-79页 * |
核电压力容器用钢板发展和宝钢的研制现状;李朝锋,付可伟;《上海金属》;20120731;第34卷(第4期);第33-37页 * |
核电用钢的开发与展望;王勇 等;《鞍钢技术》;20121231(第6期);第6-9、31页 * |
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