检索结果-南通市图书馆

Effect of tmcp Parameters on the Microstructure and Properties of Q460qNH Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2009年第6期24卷 917-921页

作者：王磊高彩茹 State Key Laboratory of Rolling and Automation Northeastern University

The effects of tmcp parameters, consisting of finish cooling temperature and start rolling temperature in non-recrystallization region, on the final microstructure and mechanical properties of Q460 qNH steel were studied by tensile, Charpy impact tests and optical microscopy. The tmcp parameters for Q460 qNH steel were optimized by laboratory experiments. The results show that the yield strength and tensile strength increase with the finish cooling temperature, and the microstructure of Q460 qNH steel consists of ferrite and granular bainite.

关键词： tmcp mechanical properties M/A constituent Q460 qNH steel

在线全文

学校读者我要写书评

暂无评论

高止裂韧度特厚板工业化生产技术开发及应用

钢铁 2023年第9期58卷 185-193,208页

作者：田勇王红涛徐晓宁邱保文李恒坤东北大学轧制技术及连轧自动化国家重点实验室辽宁沈阳110819 南京钢铁股份有限公司南钢研究院江苏南京210035

随着集装箱船舶向超大型化发展,为保证船舶的安全航行,船体中部、顶部的舱口围顶板及上甲板边板等关键部位迫切需求最大100 mm厚度的高止裂韧性钢板。为此,基于NEU-Rolling轧制工艺开发出全厚度为均匀铁素体/贝氏体显微组织和止裂性能... 详细信息

随着集装箱船舶向超大型化发展,为保证船舶的安全航行,船体中部、顶部的舱口围顶板及上甲板边板等关键部位迫切需求最大100 mm厚度的高止裂韧性钢板。为此,基于NEU-Rolling轧制工艺开发出全厚度为均匀铁素体/贝氏体显微组织和止裂性能优异的100 mm规格EH47特厚止裂钢板。在低压缩比条件限制下,NEU-Rolling轧制工艺基于钢板“心-表”温差和负荷分配控制,通过提高厚向变形渗透性以细化心部奥氏体晶粒;通过反复相变耦合形变细化表层奥氏体晶粒,最终达到钢板全厚度奥氏体晶粒的细化、均匀化和近似相同的畸变状态,而细化、均匀的奥氏体晶粒是抑制钢板心部粗化贝氏体组织生成的关键。此外,钢板心部/近心部微观组织中{110}滑移面的含量相较于钢板表层提升而{001}解理面的含量下降,钢板心部韧性组织和有利织构因素所形成的优异的低温韧性,使心部和1/4厚度的显微组织在钢板全尺寸断裂时具有相近的阻滞脆性裂纹传播的能力,形成“多峰”分布的宏观断口。“多峰”分布的断口对脆性裂纹表现出明显的“钉扎”效果,减小裂纹尖端的应力扩大系数并提高了钢板全厚度断裂时的止裂韧性。宽板拉伸试验表明,开发的100 mm特厚EH47止裂钢板-10℃止裂韧性达到9041 N/mm^(3/2),远超国际船级社相关标准,且实现全球唯一应用。

关键词： 100 mm厚止裂钢高止裂韧性全厚度显微组织织构 tmcp

Effect of Thermomechanical Controlled Processing Parameters on Microstructure and Properties of Q460q Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2010年第1期17卷 38-43页

作者： WANG Lei GAO Cai-ru WANG Yan-feng JIN Wen-zhong ZHAO De-wen LIU Xiang-hua State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China Shougang Research Institute of Technology Beijing 100041 China Shanghai Shenhua AcousticsEquipment Co Ltd Shanghai 201709 China

With tensile test, impact test, and optical microscopy, the effect of thermomechanical controlled processing （tmcp） parameters on the microstructure and properties of Q460 steel was studied and analyzed. The tmcp parameters for Q460q steel were optimized by laboratory experiments, and then, industrial trial was carried out. The result indicated that the microstructure and properties of the Q460q steel in industrial trial were in agreement with the results obtained in laboratory experiments and could meet the national standard of Q460q steel.

关键词： tmcp mechanical property M/A constituent Q460q steel

Effect of Thermomechanical Controlled Processing on Mechanical Properties of 490 MPa Grade Low Carbon Cold Heading Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2009年第3期16卷 43-48页

作者： LI Zhuang School of Materials Science and Engineering Shenyang Institute of Aeronautical EngineeringShenyang 110034 Liaoning China

Thermomechanical controlled processing （tmcp） of low carbon cold heading steel in different austenite conditions were conducted by a laboratory hot rolling mill. Effect of various processing parameters on the mechanical properties of the steel was investigated. The results showed that the mechanical properties of the low carbon cold heading steel could be significantly improved by tmcp without heat treatment. The improvement of mechanical properties can be attributed mainly to the ferrite grain refinement due to low temperature rolling. In the experiments the better ultimate tensile strength and ductility are obtained by lowering finishing cooling temperature within the temperature range from 650 ℃ to 550 ℃ since the interlamellar space in pearlite colonies become smaller. Good mechanical properties can be obtained in a proper austenite condition and thermomechanical processing parameter. The ferrite morphology has a more pronounced effect on the mechanical behavior than refinement of the microstructure. It is possible to realize the replacement of medium-carbon by low-carbon for 490 MPa grade cold heading steel with tmcp.

关键词： thermomechanical controlled processing tmcp low carbon cold heading steel low temperature rolling finishing cooling temperature

Effect of Austenite Recrystallization on Microstructure and Properties of Q345 Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2005年第5期12卷 39-46页

作者： ZHU Fu-xian LI Yan-mei LIU Yan-chun WANG Guo-dong Northeastern University Shenyang 110004 China

The Q345 plate steel austenite recrystallization behavior and strain accumulation during rolling were investigated through thermal simulation and rolling. The effect of the recrystallization behavior on the microstructure and properties of the steel was discussed and analyzed. The control principles of the pass reduction in the austenite recrystallization region and partial recrystallization region were established. It is found that to increase the thickness of intermediate billet in the finish temperature interval of 880-820℃ is favorable to grain refinement. The result has been applied to the industrial production of the 3 500 mm plate mill of Shougang Group. The average grain size of the steel plate conforms to ASTM No. 10-12, and the grade of band structure has been reduced to below 1.5.

关键词： Q345 steel plate steel austenite recrystallization strain accumulation effect tmcp grain refinement

tmcp工艺生产的100mm厚EH36钢板焊接接头的组织和性能

在线全文

学校读者我要写书评

暂无评论

热加工工艺 2022年

作者：马国金何元春王根矶许藏文魏运飞首钢京唐钢铁联合有限责任公司

介绍了tmcp工艺生产的100 mm厚EH36海洋工程用结构钢的生产方法，采用埋弧焊技术分别在15、50kJ/cm线能量下对钢板进行多道次对接焊接，分析检测了母材及焊接接头的显微组织、常规力学性能和焊接接头-10℃的裂纹尖端张开位移（CTOD）。... 详细信息

介绍了tmcp工艺生产的100 mm厚EH36海洋工程用结构钢的生产方法，采用埋弧焊技术分别在15、50kJ/cm线能量下对钢板进行多道次对接焊接，分析检测了母材及焊接接头的显微组织、常规力学性能和焊接接头-10℃的裂纹尖端张开位移（CTOD）。结果表明，采用超低碳多元微合金化成分设计，tmcp工艺试制的100 mm厚EH36钢板具有良好的力学性能，母材及不同热输入的焊接接头具有优良的低温抗开裂性能。

关键词：厚板 tmcp EH36钢板埋弧焊裂纹尖端张开位移

tmcp工艺生产的100 mm大壁厚EH36钢板焊接接头的组织和性能

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

热加工工艺 2023年第11期52卷 39-42,48页

作者：马国金何元春王根矶许藏文魏运飞首钢京唐钢铁联合有限责任公司河北唐山063200

介绍了tmcp工艺生产的100 mm厚EH36海洋工程用结构钢的生产方法,采用埋弧焊技术分别在15、50kJ/cm线能量下对钢板进行多道次对接焊接,分析检测了母材及焊接接头的显微组织、常规力学性能和焊接接头-10℃的裂纹尖端张开位移(CTOD)。结果... 详细信息

介绍了tmcp工艺生产的100 mm厚EH36海洋工程用结构钢的生产方法,采用埋弧焊技术分别在15、50kJ/cm线能量下对钢板进行多道次对接焊接,分析检测了母材及焊接接头的显微组织、常规力学性能和焊接接头-10℃的裂纹尖端张开位移(CTOD)。结果表明,采用超低碳多元微合金化成分设计,tmcp工艺试制的100 mm厚EH36钢板具有良好的力学性能,母材及不同热输入的焊接接头具有优良的低温抗开裂性能。

关键词：厚板 tmcp EH36钢板埋弧焊裂纹尖端张开位移

Development of A Series NV-F Grade Extra High Strength Plate Steels for Offshore Structure and Shipbuilding

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2011年第S1期18卷 971-977页

作者： LIU Dong-sheng,CHENG Bing-gui [Institute of Research of Iron and Steel (IRIS),Shasteel Jinfeng Town,Zhangjiagang 215625,Jiangsu,China ] IRIS Zhangjiagang 215625 Jiangsu Peoples R China

Systematic research on developing a series of extra high strength steel plates for shipbuilding via thermomechanical control process (tmcp) is introduced.A microalloyed low carbon-equivalent SiMnCrNiCu steel was used to develop F460 steel.Ultra low carbon Cu-Ni containing steels were used to develop NV-F550,NV-F620 and NV-F690 steel plates.The effect of tmcp parameters on microstructure and properties was investigated by test-scale plant trials.Industrial production trials were conducted to verify the validity of the laboratory studies on the F460 steel.Heavy plates in 45-60 mm thickness met Det Norske Veritas NV-F460 specification.The effect of heat-input on the mechanical properties of the coarse-grained-heat-affect-zone (CGHAZ) of the advanced heavy plates was studied.

关键词： tmcp heavy plate steels high strength-toughness

Surface Ferrite Grain Refinement and Mechanical Properties of Low Carbon Steel Plates

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2006年第4期13卷 35-39页

作者： FAN Jian-wen DAI Xiao-li XIE Rui-ping ZHANG Wei-xu WANG Zu-bin Shougang Research Institute of Technology Shougang Group Corporation Beijing 100041 China Chinese Society for Metals Beijing 100011 China

Considering the specialities of the steel plate production, the tmcp study has been carried out with Gleeble 2000 tester to explore the possibility of fine grained ferrite in the low carbon steel plates with the chemical composition of C 0.13--0.18, Si 0.12-0.18, Mn 0.50-0. 65, P 0. 010-0. 025, and S 0. 005-0. 028. The plates with thickness of 8. 7 mm in which the ferrite grain size is smaller than 8μm have been produced by special de- formation process in the laboratory. Furthermore, the trial production of special plain carbon steel plates of 16-25 mm in thickness and 2 000- 2 800 mm in width with fine grained ferrite has been successfully carried out in the Shougang Steel Plate Rolling Plant. The ferrite grain size is 5.5-7μm in the surface layers and 9.5-15μm in the central layer respectively. The yield strength is 320- 360 MPa, tensile strength is 440-520 MPa and the elongation is 25%- 34 %. It is very important for the rolling plants to improve the low carbon steel plates＇ mechanical properties. The results show that the ferrite grains in the surface layer can be refined effectively by the appropriate rolling process, and the strength can be also increased.

关键词： tmcp fine grained ferrite plain low carbon steel plate mechanical property