CN107502824A - Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness - Google Patents

Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness Download PDF

Info

Publication number
CN107502824A
CN107502824A CN201710934278.XA CN201710934278A CN107502824A CN 107502824 A CN107502824 A CN 107502824A CN 201710934278 A CN201710934278 A CN 201710934278A CN 107502824 A CN107502824 A CN 107502824A
Authority
CN
China
Prior art keywords
hot forming
heat treatment
forming steel
temperature
1500mpa
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
CN201710934278.XA
Other languages
Chinese (zh)
Inventor
陈勇
胡宽辉
魏星
周少云
余力
祝洪川
陈明
陈寅
刘渊媛
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.)
Wuhan Iron and Steel Co Ltd
Original Assignee
Wuhan 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 Wuhan Iron and Steel Co Ltd filed Critical Wuhan Iron and Steel Co Ltd
Priority to CN201710934278.XA priority Critical patent/CN107502824A/en
Publication of CN107502824A publication Critical patent/CN107502824A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • 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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of heat treatment method of reduction 1500MPa levels hot forming steel hydrogen-induced delayed fracture sensitiveness, 1500MPa level hot forming steel is placed in the heating furnace with nitrogen protection atmosphere when being heated to 900~950 DEG C and is incubated 180~300s progress austenitizings；It is subsequently placed in the mould with temperature regulating device and carries out punching press heat treatment shaping, quenching cooling velocity is 20~40 DEG C/s and controls mold temperature to be incubated 30~300 seconds at a temperature of making steel plate quenching temperature between 280~320 DEG C, then water quenching to room temperature.Pass through special Technology for Heating Processing in heat forming processes, so that the tissue finally obtained is not single martensite but martensite and a certain amount of retained austenite, austenite content is 2~5%, neither reduce the tensile strength of material, the extensibility of material is drastically increased again, possess higher strength and ductility product, and also have the performance of preferably anti-hydrogen-induced delayed fracture.

Description

Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness
Technical field
The invention belongs to hot forming high-strength steel production technical field, and in particular to one kind reduces 1500MPa level hot forming steel The heat treatment method of hydrogen-induced delayed fracture sensitiveness.
Background technology
With the fast development of automobile industry, lightweight and security turn into the Main way of development of automobile industry.Use Hot forming steel is currently to improve the maximally efficient measure of Crash Safety Design of Vehicles, and light-weighted important channel.Application at present Most is low-carbon Mn-B systems steel plate, and the corresponding European trade mark is 22MnB5, and its tissue is changed into uniform martensite after quenching, by force Degree reaches 1470MPa levels, applies at positions such as A posts, B posts, front and rear bumper bar, hinge stiffening plate, door anti-collision joist, middle passages, Global hot formed member yield reaches 4.5 hundred million within 2013.
However, as intensity improves, the Delayed Cracking problem of steel also occurs therewith, turn into restrict super-high strength steel apply and hair One significant problem of exhibition.Delayed Cracking be material in the presence of static stress, after certain time suddenly occur fragility A kind of phenomenon destroyed, it is the result of the interphase interaction of material-environment-stress.Numerous studies have demonstrated that steel is stagnant It is a kind of form that hydrogen causes Material degradation caused by cracking is the hydrogen in material and material military service environment afterwards, it is especially big to intensity It is more notable in 1000MPa super-high strength steel, its hydrogen-induced delayed fracture sensitiveness.Delayed Cracking is usually born outer in material Add stress level to occur suddenly when being substantially less than its yield strength, there is unpredictability, often lead to more serious destruction And consequence, therefore super-high strength steel Delayed Cracking has become automotive light weight technology and must solved the problems, such as.
The content of the invention
Present invention aim to provide a kind of heat of reduction 1500MPa levels hot forming steel hydrogen-induced delayed fracture sensitiveness Processing method, conventional cold rolling hot forming steel was both can apply to, and be also applied for the hot forming steel that CSP producing lines are produced.
To achieve the above object, the technical solution adopted by the present invention is：Reducing 1500MPa level hot forming steel hydrogen causes hysteresis to open The heat treatment method of sensitiveness is split, the chemical element component and its percentage by weight of 1500MPa level hot forming steel are：Carbon (C) 0.21~0.25%, silicon (Si) 0.26~0.30%, manganese (Mn) 1.0~1.3%, phosphorus (P)≤0.010%, sulphur (S)≤ 0.005%th, dissolved aluminum (Als) 0.015~0.060%, chromium (Cr) 0.25~0.30%, titanium (Ti) 0.026~0.030%, boron (B) 0.003~0.004%, niobium (Nb) 0.026~0.030%, vanadium (V) 0.26~0.030%, nitrogen (N)≤0.005%, surplus For iron and inevitable impurity；
The heat treatment mode is：1500MPa level hot forming steel is placed in the heating furnace with nitrogen protection atmosphere It is heated to be incubated 180~300s progress austenitizings at 900~950 DEG C；It is then quickly placed in the mould with temperature regulating device Punching press heat treatment shaping is carried out, when punching press heat treatment shapes：Quenching cooling velocity is 20~40 DEG C/s and controls mold temperature to make Steel plate quenching temperature between 280~320 DEG C at a temperature of be incubated 30~300 seconds, then water quenching to room temperature, obtain resistant to hydrogen and cause hysteresis The hot forming steel of cracking.
Further, the thickness of the 1500MPa levels hot forming steel is 0.8~3.0mm.
Further, the chemical element component of 1500MPa levels hot forming steel and its percentage by weight are：Carbon 0.24%, silicon 0.27%th, manganese 1.02%, phosphorus≤0.005%, sulphur≤0.005%, dissolved aluminum 0.024%, chromium 0.26%, titanium 0.030%, boron 0.0032%th, niobium 0.026%, vanadium 0.26%, nitrogen 0.003%%, surplus are iron and inevitable impurity；
The heat treatment mode is：1500MPa level hot forming steel is placed in the heating furnace with nitrogen protection atmosphere It is heated to be incubated 300s progress austenitizings at 930 DEG C；It is then quickly placed in the mould with temperature regulating device and carries out punching press heat Processing shaping, when punching press heat treatment shapes：Quenching cooling velocity is 30 DEG C/s and controls mold temperature steel plate quenching temperature is existed 60~300 seconds are incubated at a temperature of between 300~320 DEG C, then water quenching to room temperature, obtains the hot forming of anti-hydrogen-induced delayed fracture Steel.
It is 2~5% to measure residual austenite content using XRD diffractometers, the hot forming steel tool that the heat treatment method obtains There is excellent mechanical property, tensile strength reaches 1470~1550MPa, yield strength is 800~1000MPa, elongation percentage reaches 8 ~12%.
The impact style of ordinary hot forming steel is heated to 900 for steel is placed in the heating furnace with nitrogen protection atmosphere ~950 DEG C of 180~300s of insulation carry out austenitizing, are then quickly placed in the mould with cooling device and are struck out Shape, quenching cooling velocity are 20~40 DEG C/s, until room temperature, finally obtains martensitic structure.And the tensile strength of material is 1470~1580MPa, yield strength are 1000~1200MPa, elongation percentage is 6~8%.
The hot forming steel that heat treatment method of the present invention is produced and the hot forming steel of commonsense method production carry out hydrogen and cause to lag Cracking performance is contrasted, and the slow tension tests of SSRT, tensile strain rate 1.0 × 10 are carried out in 0.1mol/L HCl-5/ s passes through meter Calculate elongation percentage loss (hydrogen embrittlement index I)To evaluate anti-hydrogen-induced delayed fracture performance, IεBe worth it is smaller represent resistant to hydrogen cause it is stagnant Cracking performance is better afterwards.Wherein：εAElongation percentage, ε when being stretched in-sample airEElongation percentage when being stretched in-sample acid medium.
The hot forming steel of commonsense method production and the anti-hydrogen-induced delayed fracture of hot forming steel of heat treatment method of the present invention production Performance comparison is shown in Table 1
Contrast material Iε
Ordinary hot forming steel 75%
Hot forming steel of the present invention 25~32%
Compared with prior art, the present invention has advantages below：The present invention by special heat in heat forming processes at Science and engineering skill so that the tissue finally obtained is not single martensite but martensite and a certain amount of retained austenite, Ovshinsky Body content neither reduces the tensile strength of material 2~5%, drastically increases the extensibility of material again, possesses higher strong Modeling product, and also have the performance of preferably anti-hydrogen-induced delayed fracture, the present invention is not only suitable for doing using common cold rolling hot forming steel Raw material, be also applied for CSP producing lines production hot forming steel do raw material, compared to ordinary hot forming steel to have more preferable application prospect and Economic benefit.
Embodiment
With reference to embodiment, the present invention is described in further detail, is easy to more clearly understand the present invention, but it Not to the present invention form limit.
The change of 1500MPa level hot forming steel in all examples below (including four embodiments and a comparative example) Learn elemental composition and its percentage by weight is：Carbon (C) 0.24%, silicon (Si) 0.27%, manganese (Mn) 1.02%, phosphorus (P)≤ 0.005%th, sulphur (S)≤0.005%, dissolved aluminum (Als) 0.024%, chromium (Cr) 0.26%, titanium (Ti) 0.030%, boron (B) 0.0032%th, niobium (Nb) 0.026%, vanadium (V) 0.26%, nitrogen (N) 0.003%%, surplus are iron and inevitable impurity, heat The thickness of forming steel is 1.5mm.
Hot forming steel punching press Technology for Heating Processing see the table below 2
Performance corresponding to four embodiments and comparative example is shown in Table 3
Hydrogen-induced delayed fracture sensitiveness corresponding to four embodiments and comparative example is shown in Table 4

Claims (3)

  1. A kind of 1. heat treatment method of reduction 1500MPa levels hot forming steel hydrogen-induced delayed fracture sensitiveness, it is characterised in that：
    The chemical element component and its percentage by weight of 1500MPa level hot forming steel be：Carbon 0.21~0.25%, silicon 0.26~ 0.30%th, manganese 1.0~1.3%, phosphorus≤0.010%, sulphur≤0.005%, dissolved aluminum 0.015~0.060%, chromium 0.25~ 0.30%th, titanium 0.026~0.030%, boron 0.003~0.004%, niobium 0.026~0.030%, vanadium 0.26~0.030%, nitrogen ≤ 0.005%, surplus is iron and inevitable impurity；
    The heat treatment mode is：1500MPa level hot forming steel is placed in the heating furnace with nitrogen protection atmosphere and heated Austenitizing is carried out to 180~300s is incubated at 900~950 DEG C；It is subsequently placed in the mould with temperature regulating device and carries out punching press Heat treatment shaping, when punching press heat treatment shapes：Quenching cooling velocity is 20~40 DEG C/s and controls mold temperature to make steel plate quenching Temperature between 280~320 DEG C at a temperature of be incubated 30~300 seconds, then water quenching to room temperature, obtain the heat of anti-hydrogen-induced delayed fracture Forming steel.
  2. 2. the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness is reduced according to claim 1, its It is characterised by：The thickness of the 1500MPa levels hot forming steel is 0.8~3.0mm.
  3. 3. the heat treatment side of reduction 1500MPa levels hot forming steel hydrogen-induced delayed fracture sensitiveness according to claim 1 or claim 2 Method, it is characterised in that：The chemical element component and its percentage by weight of 1500MPa level hot forming steel be：Carbon 0.24%, silicon 0.27%th, manganese 1.02%, phosphorus≤0.005%, sulphur≤0.005%, dissolved aluminum 0.024%, chromium 0.26%, titanium 0.030%, boron 0.0032%th, niobium 0.026%, vanadium 0.26%, nitrogen 0.003%%, surplus are iron and inevitable impurity；
    The heat treatment mode is：1500MPa level hot forming steel is placed in the heating furnace with nitrogen protection atmosphere and heated Austenitizing is carried out to 300s is incubated at 930 DEG C；It is subsequently placed in the mould with temperature regulating device and carries out punching press heat treatment shaping, During punching press heat treatment shaping：Quenching cooling velocity is 30 DEG C/s and controls mold temperature to make steel plate quenching temperature 300~320 60~300 seconds are incubated at a temperature of between DEG C, then water quenching to room temperature, obtains the hot forming steel of anti-hydrogen-induced delayed fracture.
CN201710934278.XA 2017-10-10 2017-10-10 Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness Pending CN107502824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710934278.XA CN107502824A (en) 2017-10-10 2017-10-10 Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710934278.XA CN107502824A (en) 2017-10-10 2017-10-10 Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness

Publications (1)

Publication Number Publication Date
CN107502824A true CN107502824A (en) 2017-12-22

Family

ID=60700794

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710934278.XA Pending CN107502824A (en) 2017-10-10 2017-10-10 Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness

Country Status (1)

Country Link
CN (1) CN107502824A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108456765A (en) * 2018-04-28 2018-08-28 隆昌山川精密焊管有限责任公司 A kind of preparation method and application of the welded tube of hot forming steel production
CN108754099A (en) * 2018-06-27 2018-11-06 武汉钢铁有限公司 Reduce the heat treatment method of 1700MPa grades of hot forming steel hydrogen-induced delayed fracture sensibility
CN108796374A (en) * 2018-06-27 2018-11-13 武汉钢铁有限公司 Reduce the heat treatment method of 1300MPa grades of hot forming steel hydrogen-induced delayed fracture sensibility

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270449A (en) * 2008-05-21 2008-09-24 钢铁研究总院 High-strength thermal forming martensitic steel
CN101270453A (en) * 2008-05-21 2008-09-24 钢铁研究总院 Ultrahigh-strength thermal forming martensitic steel
CN101275200A (en) * 2008-05-21 2008-10-01 钢铁研究总院 Hotforming martensitic steel
CN106086655A (en) * 2016-08-17 2016-11-09 南京工程学院 A kind of anti-collision hot forming martensite steel being conducive to optimizing retained austenite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270449A (en) * 2008-05-21 2008-09-24 钢铁研究总院 High-strength thermal forming martensitic steel
CN101270453A (en) * 2008-05-21 2008-09-24 钢铁研究总院 Ultrahigh-strength thermal forming martensitic steel
CN101275200A (en) * 2008-05-21 2008-10-01 钢铁研究总院 Hotforming martensitic steel
CN106086655A (en) * 2016-08-17 2016-11-09 南京工程学院 A kind of anti-collision hot forming martensite steel being conducive to optimizing retained austenite

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HEPING LIU等: "Enhanced mechanical properties of a hot stamped advanced high-strength steel treated by quenching and partitioning process", 《SCRIPTA MATERIALIA》 *
徐方毅等: "热成形钢２２ＭｎＢ５的Ｑ＆Ｐ工艺", 《材 料 科 学 与 工 程 学 报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108456765A (en) * 2018-04-28 2018-08-28 隆昌山川精密焊管有限责任公司 A kind of preparation method and application of the welded tube of hot forming steel production
CN108754099A (en) * 2018-06-27 2018-11-06 武汉钢铁有限公司 Reduce the heat treatment method of 1700MPa grades of hot forming steel hydrogen-induced delayed fracture sensibility
CN108796374A (en) * 2018-06-27 2018-11-13 武汉钢铁有限公司 Reduce the heat treatment method of 1300MPa grades of hot forming steel hydrogen-induced delayed fracture sensibility

Similar Documents

Publication Publication Date Title
CN103789686B (en) A kind of thermal treatment process eliminating hydrogenator steel reinforced concrete crystalline substance, open grain structure
CN109252107B (en) Production method of high-flatness ultrahigh-strength steel
CN108018503A (en) A kind of stratiform Ultra-fine Grained dual phase ferritic/martensite steel and preparation method thereof
CN107619993A (en) Yield strength 750MPa level cold rolling martensite steel plates and its manufacture method
CN107012398B (en) A kind of Nb-microalloying TRIP steel and preparation method thereof
EP3354756A1 (en) Online-controlled seamless steel tube cooling process and seamless steel tube manufacturing method with effective grain refinement
KR102143075B1 (en) Non-quenched and tempered wire rod having excellent drawability and impact toughness and method of manufacturing the same
CN102876999A (en) Steel plate for hardening and tempering type low temperature pressure vessel and method for producing steel plate
US20180147614A1 (en) Press hardened steel with increased toughness and method for production
CN107502824A (en) Reduce the heat treatment method of 1500MPa level hot forming steel hydrogen-induced delayed fracture sensitiveness
KR20170026490A (en) Martensitic steels with 1700-2200 mpa tensile strength
CN106929755A (en) A kind of steel plate and its manufacture method and purposes for producing low temperature drop stamping auto parts and components
CN113846266A (en) Production method of high-ductility and toughness quenched and tempered steel plate with yield strength of 1300MPa
CN110079743A (en) A kind of 1500MPa grades of low hydrogen-induced delayed cracking sensibility hot forming steel and production method
AU2017418679B2 (en) Low yield strength ratio, high strength and ductility thick gauge steel plate and manufacturing method therefor
CN112981277A (en) Preparation method of ultrahigh-strength medium-carbon nano bainite steel
CN107699804A (en) The method for reducing 1500MPa thin plate hot forming steel hydrogen-induced delayed fractures
CN104195429A (en) Low-yield-ratio low-cracking-sensitivity Q550CF quenched and tempered steel and producing method
CN106498297A (en) Precision stamping automotive seat actuator fluted disc cold-rolled steel sheet and its manufacture method
CN114214563A (en) High-toughness hot stamping steel rolled by sheet billet with Rm more than or equal to 1500MPa and production method
Tisza Hot forming of boron alloyed Manganese steels
CN117488201A (en) High fracture strain hot stamping forming member, steel plate for hot stamping and hot stamping process
US4295902A (en) Method of manufacturing rolled steel products with high elastic limit
CN104212961A (en) Tempering heat treatment method of Mn-series high-strength finish rolling thread reinforcing steel bars
CN106811692B (en) A kind of quenching high-strength easily molded cold-rolled steel sheet and its manufacturing method

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: 20171222

RJ01 Rejection of invention patent application after publication