CN109136747A - The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method - Google Patents

The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method Download PDF

Info

Publication number
CN109136747A
CN109136747A CN201810866697.9A CN201810866697A CN109136747A CN 109136747 A CN109136747 A CN 109136747A CN 201810866697 A CN201810866697 A CN 201810866697A CN 109136747 A CN109136747 A CN 109136747A
Authority
CN
China
Prior art keywords
thin plate
yield strength
thickness
low yield
steel
Prior art date
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.)
Pending
Application number
CN201810866697.9A
Other languages
Chinese (zh)
Inventor
刘建磊
张晨光
马驰
雷钧皓
邓东生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuyang Iron and Steel Co Ltd
Original Assignee
Wuyang Iron and Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuyang Iron and Steel Co Ltd filed Critical Wuyang Iron and Steel Co Ltd
Priority to CN201810866697.9A priority Critical patent/CN109136747A/en
Publication of CN109136747A publication Critical patent/CN109136747A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

Abstract

The invention discloses a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production methods, the thin plate chemical component composition and its mass percentage are as follows: C:0.16~0.18%, Si:0.20~0.40%, Mn:1.15~1.25%, P≤0.015%, S≤0.005%, Cr:0.20~0.30%, Mo:0.15~0.25%, V:0.035~0.045%, Ti:0.010~0.015%, B:0.0008~0.0018%, surplus are Fe and inevitable impurity；The production method includes smelting ingredient, the refining of LF furnace, VD vacuum refining, heating, heat treatment procedure.The present invention is designed using the ingredient of the humble alloying element of high C, is aided with medium temperature Quenching plus tempering process, is realized the product quality requirement of≤0.95 yield tensile ratio, is met the market demand.

Description

The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio And production method.
Background technique
Popularization with low yield strength ratio steel in regular tenacity level structures rings domain, market are bent for quenched and tempered state high-strength steel There has also been limitations to require for strong ratio, mainstream kind of the quenched and tempered steel of Q690 intensity rank as quenched and tempered steel, aobvious to the control of yield tensile ratio It is more urgent.
In terms of steel grade controls difficulty: the different conditions of delivery with regular tenacity rank steel grade, quenched and tempered state than controlled rolling state, just The control difficulty of fiery state is bigger, and with the reduction of steel plate thickness, the control difficulty of yield tensile ratio also significantly increases.It is logical In normal situation, the yield tensile ratio controlled level of 8mm thick quenched and tempered steel is generally >=0.98.
At the scene in terms of technology controlling and process: thin plate quenched for 8mm already belongs to the very thin steel of Heavy Plate Plant on rolling specs Plate, it is contemplated that the needs rolled into cannot achieve technological measure in rolling sequence, and in heat treatment stages, steel plate has also been not present The problem of through hardening, needs to make great innovation in terms of technique thinking.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and lifes Production method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of 8mm thickness Q690 intensity rank is low to bend by force Than quenched thin plate, the thin plate chemical component composition and its mass percentage are as follows: C:0.16~0.18%, Si:0.20~ 0.40%, Mn:1.15~1.25%, P≤0.015%, S≤0.005%, Cr:0.20~0.30%, Mo:0.15~0.25%, V: 0.035~0.045%, Ti:0.010~0.015%, B:0.0008~0.0018%, surplus are Fe and inevitable impurity.
Thin plate Ceq:0.43~0.50% of the present invention.
Lamella thickness specification of the present invention is 8mm.
Thin plate yield tensile ratio≤0.95 of the present invention.
The present invention also provides a kind of production method of the quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio, the lifes Production method includes smelting ingredient, the refining of LF furnace, VD vacuum refining, heating, heat treatment procedure；The heat treatment procedure, in Warm quenching+tempering technique, 875~885 DEG C of hardening heat.
Heat treatment procedure of the present invention, 875~885 DEG C of hardening heat, the cool time: 40~42min；Tempering temperature 620~630 DEG C, 50~55min of tempering time.
Smelting burden process of the present invention, ladle baking is good, baking temperature >=900 DEG C；Tapping cannot be shown in slag, tap 1600 DEG C of temperature >, C≤0.10% in molten steel；Using the fine fodder that must not be incorporated briquetting, slag steel, packet bottom, useless ingot mould, Xin Bao, big benefit When furnace and the abnormal working of a furnace, this steel grade must not be smelted.
LF furnace refining procedure of the present invention, whole process guarantees that Argon is good, refines white slag retention time >=30min, and LF is total Refining time >=55min, aluminum steel dosage >=1.8kg/t steel, lime consumption >=17kg/t steel, ferrosilicon deoxidier dosage >=2kg/t Steel, process aluminium content >=0.015%, aluminium >=0.020% of skimming, refining terminate S≤0.005%.
Ca-Si is added before vacuum in vacuum refining process of the present invention, 55~62Pa of vacuum degree, retention time >=20min Block >=1.5kg/t steel, argon gas soft blow time >=5min when vacuumizing are turned over so that the top of the slag is micro-, subject to molten steel is not exposed, are not permitted after vacuum Perhaps it mends and feeds Al line.
Heating process of the present invention, 1250 DEG C of maximum heating temperature, 1220~1240 DEG C of soaking section temperature, soaking zone is protected Warm time >=60min, heating time coefficient >=10min/mm guarantee that steel billet is grilled thoroughly, uniformly.
The quenched light sheet products canonical reference GB/T16270-2009 of 8mm thickness Q690 intensity rank low yield strength ratio of the present invention；It produces Product examine surveys method standard and refers to GB/T228.
The beneficial effects of adopting the technical scheme are that the present invention is for the thick ultra-thin quenched Q690 rank of 8mm Steel plate is designed using the ingredient of the humble alloying element of high C, is aided with medium temperature Quenching plus tempering process, is realized≤0.95 and is bent The product quality requirement of strong ratio, meets the demand in market, realizes the upgrading of traditional product.
Specific embodiment
The present invention will be further described in detail combined with specific embodiments below.
Embodiment 1
The quenched thin plate heat (batch) number of the present embodiment Q690 intensity rank low yield strength ratio is 17409234N2, thickness specification 8mm, chemistry At being grouped as and mass percentage are as follows: C:0.18%, Si:0.27%, Mn:1.18%, P:0.014%, S:0.0023%, Cr: 0.20%, Mo:0.19%, V:0.038%, Ti:0.012%, B:0.0011%, Ceq:0.46%, surplus be Fe and inevitably it is miscellaneous Matter.
The quenched thin plate production method of the present embodiment Q690 intensity rank low yield strength ratio includes smelting ingredient, the refining of LF furnace, VD Vacuum refining, heating, heat treatment procedure, specific process step are as described below:
(1) burden process is smelted: using the fine fodder that must not be incorporated briquetting, slag steel, packet bottom, useless ingot mould, Xin Bao, big fettling and the working of a furnace When abnormal, this steel grade must not be smelted；Ladle baking is good, and 900 DEG C of baking temperature；Tapping cannot be shown in slag, tapping temperature 1610 DEG C, C:0.10% in molten steel；
(2) LF furnace refining procedure: whole process guarantees that Argon is good, refines the total refining time 55min of white slag retention time 30min, LF, Aluminum steel dosage 1.8kg/t steel, lime consumption >=17kg/t steel, ferrosilicon deoxidier dosage 2kg/t steel, process aluminium content 0.015%, It skims aluminium 0.020%, refining terminates S:0.005%；
(3) VD vacuum refining process: Ca-Si block 1.60kg/t steel is added before vacuum by vacuum degree 60Pa, retention time 20min, takes out Argon soft blow time 6min when vacuum is not mended after vacuum and is fed Al line；
(4) heating process: 1250 DEG C of maximum heating temperature, 1220 DEG C of soaking section temperature, soaking zone soaking time 60min, heating Time coefficient 10min/mm；
(5) heat treatment procedure: 880 DEG C of hardening heat, the cool time: 40min；625 DEG C of tempering temperature, tempering time 50min.
The present embodiment Q690 intensity rank low yield strength ratio quenched thin plate yield strength 816MPa, tensile strength 862MPa are bent Strong ratio 0.95, elongation percentage 16%；- 40 DEG C of impact of collision function 148,138,170J.
Embodiment 2
The quenched thin plate heat (batch) number of the present embodiment Q690 intensity rank low yield strength ratio is 17409104N2, thickness specification 8mm, chemistry At being grouped as and mass percentage are as follows: C:0.16%, Si:0.23%, Mn:1.25%, P:0.013%, S:0.0019%, Cr: 0.22%, Mo:0.18%, V:0.040%, Ti:0.013%, B:0.0016%, Ceq:0.46%, surplus be Fe and inevitably it is miscellaneous Matter.
The quenched thin plate production method of the present embodiment Q690 intensity rank low yield strength ratio includes smelting ingredient, the refining of LF furnace, VD Vacuum refining, heating, heat treatment procedure, specific process step are as described below:
(1) burden process is smelted: using the fine fodder that must not be incorporated briquetting, slag steel, packet bottom, useless ingot mould, Xin Bao, big fettling and the working of a furnace When abnormal, this steel grade must not be smelted；Ladle baking is good, and 920 DEG C of baking temperature；Tapping cannot be shown in slag, tapping temperature 1650 DEG C, C:0.08% in molten steel；
(2) LF furnace refining procedure: whole process guarantees that Argon is good, refines the total refining time 58min of white slag retention time 32min, LF, Aluminum steel dosage 1.95kg/t steel, lime consumption 19kg/t steel, ferrosilicon deoxidier dosage 2.5kg/t steel, process aluminium content 0.017%, It skims aluminium 0.025%, refining terminates S:0.003%；
(3) VD vacuum refining process: Ca-Si block 1.55kg/t steel is added before vacuum by vacuum degree 58Pa, retention time 25min, takes out Argon soft blow time 7min when vacuum is not mended after vacuum and is fed Al line；
(4) heating process: 1250 DEG C of maximum heating temperature, 1240 DEG C of soaking section temperature, soaking zone soaking time 65min, heating Time coefficient 12min/mm；
(5) heat treatment procedure: 880 DEG C of hardening heat, the cool time: 40min；625 DEG C of tempering temperature, tempering time 50min.
The present embodiment Q690 intensity rank low yield strength ratio quenched thin plate yield strength 824MPa, tensile strength 870MPa are bent Strong ratio 0.95, elongation percentage 16.5%；- 40 DEG C of impact of collision function 190,195,182J.
Embodiment 3
The quenched thin plate heat (batch) number of the present embodiment Q690 intensity rank low yield strength ratio be 18401343, thickness specification 8mm, chemistry at It is grouped as and mass percentage are as follows: C:0.16%, Si:0.20%, Mn:1.15%, P:0.015%, S:0.005%, Cr:0.20%, Mo:0.15%, V:0.035%, Ti:0.010%, B:0.0008%, Ceq:0.43%, surplus are Fe and inevitable impurity.
The quenched thin plate production method of the present embodiment Q690 intensity rank low yield strength ratio includes smelting ingredient, the refining of LF furnace, VD Vacuum refining, heating, heat treatment procedure, specific process step are as described below:
(1) burden process is smelted: using the fine fodder that must not be incorporated briquetting, slag steel, packet bottom, useless ingot mould, Xin Bao, big fettling and the working of a furnace When abnormal, this steel grade must not be smelted；Ladle baking is good, and 905 DEG C of baking temperature；Tapping cannot be shown in slag, tapping temperature 1630 DEG C, C:0.06% in molten steel；
(2) LF furnace refining procedure: whole process guarantees that Argon is good, refines the total refining time 59min of white slag retention time 35min, LF, Aluminum steel dosage 2.1kg/t steel, lime consumption 18kg/t steel, ferrosilicon deoxidier dosage 3kg/t steel, process aluminium content 0.020% are taken off Slag aluminium 0.030%, refining terminate S:0.002%；
(3) VD vacuum refining process: Ca-Si block 1.65kg/t steel is added before vacuum by vacuum degree 55Pa, retention time 27min, takes out Argon soft blow time 5min when vacuum is not mended after vacuum and is fed Al line；
(4) heating process: 1250 DEG C of maximum heating temperature, 1230 DEG C of soaking section temperature, soaking zone soaking time 68min, heating Time coefficient 13min/mm；
(5) heat treatment procedure: 875 DEG C of hardening heat, the cool time: 41min；620 DEG C of tempering temperature, cool time 52min.
The present embodiment Q690 intensity rank low yield strength ratio quenched thin plate yield strength 783MPa, tensile strength 834MPa are bent Strong ratio 0.94, elongation percentage 24%；- 40 DEG C of impact of collision function 90,112,131J.
Embodiment 4
The quenched thin plate heat (batch) number of the present embodiment Q690 intensity rank low yield strength ratio be 18401916, thickness specification 8mm, chemistry at It is grouped as and mass percentage are as follows: C:0.17%, Si:0.40%, Mn:1.25%, P:0.010%, S:0.002%, Cr:0.30%, Mo:0.25%, V:0.045%, Ti:0.015%, B:0.0018%, Ceq:0.50%, surplus are Fe and inevitable impurity.
The quenched thin plate production method of the present embodiment Q690 intensity rank low yield strength ratio includes smelting ingredient, the refining of LF furnace, VD Vacuum refining, heating, heat treatment procedure, specific process step are as described below:
(1) burden process is smelted: using the fine fodder that must not be incorporated briquetting, slag steel, packet bottom, useless ingot mould, Xin Bao, big fettling and the working of a furnace When abnormal, this steel grade must not be smelted；Ladle baking is good, and 950 DEG C of baking temperature；Tapping cannot be shown in slag, tapping temperature 1660 DEG C, C:0.07% in molten steel；
(2) LF furnace refining procedure: whole process guarantees that Argon is good, refines the total refining time 60min of white slag retention time 36min, LF, Aluminum steel dosage 2.4kg/t steel, lime consumption 20kg/t steel, ferrosilicon deoxidier dosage 2.8kg/t steel, process aluminium content 0.022%, It skims aluminium 0.028%, refining terminates S:0.004%；
(3) VD vacuum refining process: Ca-Si block 1.50kg/t steel is added before vacuum by vacuum degree 62Pa, retention time 30min, takes out Argon soft blow time 8min when vacuum is not mended after vacuum and is fed Al line；
(4) heating process: 1250 DEG C of maximum heating temperature, 1225 DEG C of soaking section temperature, soaking zone soaking time 70min, heating Time coefficient 11min/mm；
(5) heat treatment procedure: 885 DEG C of hardening heat, the cool time: 42min；630 DEG C of tempering temperature, cool time 55min.
The present embodiment Q690 intensity rank low yield strength ratio quenched thin plate yield strength 749MPa, tensile strength 803MPa are bent Strong ratio 0.93, elongation percentage 19%；- 40 DEG C of impact of collision function 148,187,111J.
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 (10)

1. a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio, which is characterized in that thin plate chemical component composition and Its mass percentage are as follows: C:0.16~0.18%, Si:0.20~0.40%, Mn:1.15~1.25%, P≤0.015%, S≤ 0.005%, Cr:0.20~0.30%, Mo:0.15~0.25%, V:0.035~0.045%, Ti:0.010~0.015%, B: 0.0008~0.0018%, surplus is Fe and inevitable impurity.
2. a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 1, which is characterized in that institute State thin plate Ceq:0.43~0.50%.
3. a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 1, which is characterized in that institute Stating lamella thickness specification is 8mm.
4. a kind of quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 1, which is characterized in that institute State thin plate yield tensile ratio≤0.95.
5. a kind of life of the quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to any one of claims 1-4 Production method, which is characterized in that the production method includes smelting ingredient, the refining of LF furnace, VD vacuum refining, heating, heat treatment work Sequence；The heat treatment procedure, using medium temperature quenching+tempering technique, 875~885 DEG C of hardening heat.
6. a kind of production method of the quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 5, special Sign is, the heat treatment procedure, 875~885 DEG C of hardening heat, the cool time: 40~42min；Tempering temperature 620~630 DEG C, 50~55min of tempering time.
7. a kind of production method of the quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 5, special Sign is, the smelting burden process, baking temperature of steel ladle >=900 DEG C；Slag cannot be seen by tapping, 1600 DEG C of tapping temperature >, steel C≤0.10% in water.
8. the life of the quenched thin plate of a kind of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 5-7 any one Production method, which is characterized in that the LF furnace refining procedure, whole process guarantee that Argon is good, refining white slag retention time >=30min, Total refining time >=the 55min of LF, aluminum steel dosage >=1.8kg/t steel, lime consumption >=17kg/t steel, ferrosilicon deoxidier dosage >= 2kg/t steel, process aluminium content >=0.015%, aluminium >=0.020% of skimming, refining terminate S≤0.005%.
9. the life of the quenched thin plate of a kind of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 5-7 any one Production method, which is characterized in that the vacuum refining process, 55~62Pa of vacuum degree, retention time >=20min are added before vacuum Ca-Si block >=1.5kg/t steel, argon gas soft blow time >=5min when vacuumizing are turned over so that the top of the slag is micro-, subject to molten steel is not exposed, vacuum Do not allow to mend afterwards and feeds Al line.
10. the life of the quenched thin plate of a kind of 8mm thickness Q690 intensity rank low yield strength ratio according to claim 5-7 any one Production method, which is characterized in that the heating process, 1250 DEG C of maximum heating temperature, 1220~1240 DEG C of soaking section temperature, soaking Section soaking time >=60min, heating time coefficient >=10min/mm.
CN201810866697.9A 2018-08-01 2018-08-01 The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method Pending CN109136747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810866697.9A CN109136747A (en) 2018-08-01 2018-08-01 The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810866697.9A CN109136747A (en) 2018-08-01 2018-08-01 The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method

Publications (1)

Publication Number Publication Date
CN109136747A true CN109136747A (en) 2019-01-04

Family

ID=64799580

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810866697.9A Pending CN109136747A (en) 2018-08-01 2018-08-01 The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method

Country Status (1)

Country Link
CN (1) CN109136747A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109881092A (en) * 2019-02-26 2019-06-14 舞阳钢铁有限责任公司 A kind of big thickness rack steel plate and its production method
CN111020399A (en) * 2019-12-12 2020-04-17 舞阳钢铁有限责任公司 Normalized air-cooled steel plate with long-time die welding performance and production method thereof
CN111020351A (en) * 2019-12-12 2020-04-17 舞阳钢铁有限责任公司 Low-carbon steel plate with excellent low-temperature impact toughness and welding performance and production method thereof
CN111088467A (en) * 2020-01-15 2020-05-01 邯郸钢铁集团有限责任公司 Low-compression-ratio super-thick Q690D quenched and tempered high-strength steel plate and production method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104195429A (en) * 2014-05-30 2014-12-10 秦皇岛首秦金属材料有限公司 Low-yield-ratio low-cracking-sensitivity Q550CF quenched and tempered steel and producing method
CN106399840A (en) * 2016-09-18 2017-02-15 舞阳钢铁有限责任公司 Low-cost and low-yield-ratio hardening and tempering type Q690E steel plate and production method
CN108251748A (en) * 2018-03-28 2018-07-06 舞阳钢铁有限责任公司 A kind of low-carbon-equivalent Nuclear containment steel plate and its production method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104195429A (en) * 2014-05-30 2014-12-10 秦皇岛首秦金属材料有限公司 Low-yield-ratio low-cracking-sensitivity Q550CF quenched and tempered steel and producing method
CN106399840A (en) * 2016-09-18 2017-02-15 舞阳钢铁有限责任公司 Low-cost and low-yield-ratio hardening and tempering type Q690E steel plate and production method
CN108251748A (en) * 2018-03-28 2018-07-06 舞阳钢铁有限责任公司 A kind of low-carbon-equivalent Nuclear containment steel plate and its production method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109881092A (en) * 2019-02-26 2019-06-14 舞阳钢铁有限责任公司 A kind of big thickness rack steel plate and its production method
CN111020399A (en) * 2019-12-12 2020-04-17 舞阳钢铁有限责任公司 Normalized air-cooled steel plate with long-time die welding performance and production method thereof
CN111020351A (en) * 2019-12-12 2020-04-17 舞阳钢铁有限责任公司 Low-carbon steel plate with excellent low-temperature impact toughness and welding performance and production method thereof
CN111088467A (en) * 2020-01-15 2020-05-01 邯郸钢铁集团有限责任公司 Low-compression-ratio super-thick Q690D quenched and tempered high-strength steel plate and production method thereof

Similar Documents

Publication Publication Date Title
CN109136747A (en) The quenched thin plate of 8mm thickness Q690 intensity rank low yield strength ratio and production method
CN106834960B (en) A kind of automobile using boracic top grade gear steel and its production technology
CN101717893B (en) 55Si2MnVNbN spring steel and production process thereof
CN102758144B (en) Production method for steel ingot of large-sized high-nitrogen retaining ring steel
CN106191652B (en) A kind of smelting process reducing spring steel clip sundries
CN105018669B (en) A kind of production method of nuclear power ingot iron
CN108866444B (en) Corrosion-resistant mirror surface die steel and preparation method thereof
CN103627973B (en) A kind of production method of low-carbon high-chromium steel
CN104451385B (en) A kind of low-carbon (LC), low nitrogen, hyperoxia ingot iron and its production method
CN105349750B (en) High annealing drop-bottom and its manufacture method
CN108165888B (en) 4140 plastic die steel plate delivered in annealed state and production method thereof
CN1850377A (en) Process for producing hot-rolled sheet for cold-rolling and punching
CN113584410A (en) Production method of novel high-strength extra-thick FH500 steel plate for ocean engineering
CN105132616B (en) Method for preventing surface of flange steel from cracking
CN107034421B (en) Highly corrosion resistant high tensile reinforcement and its converter manufacturing method
CN104498830B (en) A kind of structural alloy steel and its production method
CN104561442B (en) A kind of nuclear power preparation method of 347 austenitic stainless steels
CN106521329A (en) Production method for non-quenched and tempered free-cutting steel
CN103540856A (en) 3Cr17NiMoV stainless steel strip and preparation method
CN103498099A (en) Thick-gauge steel plate with excellent low-temperature aging performance, and manufacturing method thereof
CN103643115A (en) Boron-containing steel with low yield ratio and preparation method therefor
CN103194593B (en) Residual quenching heat control process in hardening and tempering of high-strength steel
CN114032355A (en) Ultra-low phosphorus continuous casting billet and production method and application thereof
CN105714023B (en) A kind of low silicon aluminium killed steel purifier and method
CN112647017A (en) Method for controlling inclusions in gear steel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190104

RJ01 Rejection of invention patent application after publication