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 PDF

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Publication number
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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sa738gr
steel plates
production method
cogging
temperature
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CN105506493A (en
Inventor
罗志华
乔馨
李新玲
李靖年
刘浩岩
张坤
王动
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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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

A kind of production method of ultra-thin SA738Gr B steel plates
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.
CN201410497871.9A 2014-09-25 2014-09-25 A kind of production method of ultra-thin SA738Gr B steel plates Active CN105506493B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

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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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