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Comparison of Grain Size in Plain Carbon Hot-Rolled Sheets Manufactured by CSP and Conventional Rolling Processing

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Journal of Iron and Steel Research International 2012年第1期19卷 17-22页

作者： ZHU Xue-song ZHU Guo-hui mao wei-min School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering Anhui University of Technology Ma＇anshan 243002 Anhui China

Average grain size and grain size distribution in as hot-rolled SPHC, SPHD, and SPHE sheets manufac- tured by compact strip production （CSP） processing and traditional continuous casting and rolling （CCR） processing respectively were investigated by quantitative metallographic method. The results show that the average grain size and distribution width of grain size in sheets manufactured by CSP processing was obviously larger than that by CCR processing. It was analyzed that multi-phase transformation and high reduction ratio in CCR processing resulted in refining grain size, which would be dominant reason for controlling grain size. In plain carbon steels such as SPHC, SPHD and SPHE, the effect of fine precipitation in CSP on behavior of deformation and recrystallization of austenite during roiling, and consequent refinement of grain size seem not to be as important as the effect of reheating and roughing in CCR processing. Homogenizing in reheating and refining grain size in roughing in CCR processing would refine final grain size and also make grain size homogenized, Very coarse grain size would result in mixed grain size, large distribution width of grain size due to interaction of static and dynamic recrystallization in CSP processing

关键词： CSP CCR hot-rolled plate grain size

Semisolid Slurry Preparation of Die Steel with High Chromium Content

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Journal of Iron and Steel Research International 2004年第5期11卷 8-12页

作者： mao wei-min ZHAO Ai-min ZHANG Li-juan ZHONG Xue-you University of Science and Technology Beijing

The control model of laminar cooling system for hot strip, including air-cooling model, water-cooling model, temperature distribution model along thickness direction, feedforward control model, feedback control model and self-learning model, was introduced. PID arithmetic and Smith predictor controller were applied to feedback control. The sample of model parameter classification was given. The calculation process was shown by flow chart. The model has been proved to be simple, effective and of high precision.

关键词： hot strip laminar cooling control model Smith predictor

Texture Evolution of Columnar Grains in Electrical Steel During Hot Rolling

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Journal of Iron and Steel Research International 2013年第10期20卷 99-106页

作者： SHAO Yuan-yuan YANG Ping FU Yong-jun mao wei-min School of Materials Science and Engineering University of Science and Technology Beijing Cold Rolling Silicon Steel Division Angang Steel Company Limited

Columnar grains in cast slabs of electrical steel show strong anisotropy in grain orientation and morphology and thus influence the subsequent microstructure and texture after hot rolling significantly. The texture evolution of hot rolled sheets containing initial columnar grains with their 〈100〉 directions approximately parallel to the rolling direction （RD）, transverse direction （TD） and normal direction （ND） of the hot rolled sheets was investigated by using EBSD technique. The results indicated that, whatever the initial texture of the columnar grains was, typical Goss, brass-type and copper-type shear texture component could develop in shear-deformed surface region. The copper-type texture formed under the maximum shearing force with the fine, sheared or dynamically recrystallized grains, and Goss grains were mainly elongated and deformed grains, while brass grains behaved between them. Ad- ditionally, the rotating relationship of the three types of shear textures was different due to the restriction of grain boundaries. In homogenously deformed center region, the RD sample contained more {112}〈110^-〉 grains, and TD sample was covered by {100} textures such as {100}〈011〉 and {100}〈021〉 with coarse grains, while the ND sample developed many {100}〈001〉 grains which were attributed to more {100} grains in the initial sample. Re- markable texture transition occurred on both sides of grain boundaries when {110} grains were adjacent to mfiber texture grains. It was found that significant texture gradient and preferred distribution of rotating axis existed in the soft orientation grains on the α- fiber when the grains neighbored hard grains on γ-fiber.

关键词： electrical steel columnar grain hot rolling texture orientation

Preparation of Semisolid Slurry for Stainless Steel 1Cr18Ni9Ti

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Journal of Iron and Steel Research International 2004年第3期11卷 11-14页

作者： mao wei-min ZHAO Ai-min YUN Dong ZHANG Le-ping ZHONG Xue-you University of Science and Technology Beijing

The controlled runout table cooling is essential in determining the final mechanical properties and flatness of steel strip. The heat of a hot steel strip is mainly extracted by cooling water during runout. In order to study the heat transfer by water jet impingement boiling during runout,a pilot facility was constructed at the University of British Columbia. On this pilot facility,the water jet impingement tests were carried out under various cooling conditions to investigate the effect of processing parameters,such as cooling water temperature,water jet impingement velocity,initial strip temperature,water flow rate,water nozzle diameter and array of water nozzles,on the heat transfer of heated strip. The results obtained contribute to the optimization of cooling water during runout.

关键词： cooling water controlled runout table hot strip mill

未来已至——少见基因改变的术后辅助靶向时代或已到来

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循证医学 2024年第2期24卷 70-72页

作者：王文静徐晓玲毛伟敏(指导) 浙江省肿瘤医院中国科学院杭州医学研究所杭州310022 温州医科大学研究生培养基地浙江温州325035 上海肺科医院同济大学医学院上海200433 中国科学院肿瘤与基础医学研究所杭州310022

ALINA研究[1]是首个成功将间变性淋巴瘤激酶(anaplastic lymphoma kinase,ALK)抑制剂应用于非小细胞肺癌(non-small cell lung cancer,NSCLC)患者辅助治疗的Ⅲ期临床研究,首次公布在2023年欧洲肿瘤内科学会(European Society for Medical Oncology,ESMO)大会。近期,the New England Journal of Medicine正式发表了这项全球性、Ⅲ期、开放、随机试验ALINA研究的中期分析结果[2].

关键词：晚期肺癌 ALK 靶向治疗临床研究

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冲压钢板塑性应变比r值的在线检测技术

钢铁 2006年第11期41卷 37-41页

作者：毛卫民北京科技大学材料学系新金属材料国家重点实验室北京100083

根据冲压钢板极图的对称性可以大幅度地减少极图数据检测量,利用X射线面探测可以一次性记录到所需的关键极图数据,进而计算出正态分布的各织构组分的体积量。利用反应应力模型可以根据各织构组分体积量快速而准确地计算出钢板的r值。相... 详细信息

根据冲压钢板极图的对称性可以大幅度地减少极图数据检测量,利用X射线面探测可以一次性记录到所需的关键极图数据,进而计算出正态分布的各织构组分的体积量。利用反应应力模型可以根据各织构组分体积量快速而准确地计算出钢板的r值。相关计算也可以兼顾到一些非织构因素的影响。该技术快速、准确,可用于冲压钢板的r值在线检测。

关键词：冲压钢板织构 r值在线检测

Is the Cape Stone Forest in Shantou City formed by wave erosion? A comparison of the pedestal rocks on the coasts and the mountains of Queshi in eastern Guangdong, China

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Journal of Mountain Science 2024年第5期21卷 1447-1463页

作者： CHEN min WANG wei School of Geography South China Normal UniversityGuangzhou 510631China

Cape Stone Forest is a group of granite rock pillars(pedestal rocks) towering over Shilin Lake, on the southern shore of Shantou Bay in eastern Guangdong, China. The rock pillars were previously identified as sea stacks because they have marine notch-like concave sidewalls at their base, and more importantly, the lake is immediately adjacent to the bay, which is exposed to the open sea. However, rock pillars similar in shape and size can also be found at the top of Queshi Mountain, which is only about 300 meters northwest of the lake and about 85 meters above sea level. Therefore, the marine origin of Cape Stone Forest is seriously questioned. In this study, 3D imagery and drone technology were used to collect data in the investigations without direct manual measurements in the water or on the mountain. It shows that the concave sidewalls of the rock pillars in the lake and on the mountains occur at different heights and are exposed to different directions, while a natural sea stack on Mayu Island at the mouth of Shantou Bay has a horizontal notch parallel to the sea level, although the granite rock of the sea stack is the same as that of the lake and the mountains. The eastern side of the island, where the sea stack is located, is exposed to the open sea but blocks large waves for the rock pillars in the lake. Therefore, the origin of Cape Stone Forest cannot be explained by wave-based mechanisms. The only satisfactory explanation that takes into account all the field evidence is that the narrow rock pillars of the lake and mountain were formed by chemical weathering that penetrated closely the spaced joints of the granite rock, and the notch-like concave sidewalls were formed by more effective chemical weathering at the base of the pillars.

关键词： Pedestal rock Granite Closely spaced joints Wave erosion Chemical weathering

Metabolic cell death in cancer:ferroptosis,cuproptosis,disulfidptosis,and beyond

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Protein & Cell 2024年第9期15卷 642-660页

作者： Chao mao min Wang Li Zhuang Boyi Gan Department of Experimental Radiation Oncology The University of Texas MD Anderson Cancer CenterHoustonTX 77030USA Department of Molecular and Cellular Biology Baylor College of MedicineHoustonTX 77030USA The University of Texas MD Anderson UTHealth Graduate School of Biomedical Sciences HoustonTX 77030USA

Cell death resistance represents a hallmark of *** studies have identified metabolic cell death as unique forms of regulated cell death resulting from an imbalance in the cellular *** review discusses the mechanisms of metabolic cell death—ferroptosis,cuproptosis,disulfidptosis,lysozincrosis,and alkaliptosis—and explores their potential in cancer *** review underscores the complexity of the metabolic cell death pathways and offers insights into innovative therapeutic avenues for cancer treatment.

关键词： cell death cancer treatment ferroptosis cuproptosis disulfidptosis

维普期刊数据库评论

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维普期刊数据库

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晶面指数对高纯铝表面腐蚀发孔的影响

中国有色金属学报 2008年第10期18卷 1802-1806页

作者：李东毛卫民北京科技大学材料科学与工程学院北京100083 北京科技大学新金属材料国家重点实验室北京100083

采用含有盐酸、硝酸、氢氟酸的混合溶液腐蚀了从高纯铝锭上切割出的单晶{100}和{124}表面。定量统计两表面腐蚀孔密度随腐蚀时间的变化,并对变化规律进行了非线性拟合。研究表明,试样表面发生点蚀的位置为表面位错露头,其腐蚀发孔的难... 详细信息

采用含有盐酸、硝酸、氢氟酸的混合溶液腐蚀了从高纯铝锭上切割出的单晶{100}和{124}表面。定量统计两表面腐蚀孔密度随腐蚀时间的变化,并对变化规律进行了非线性拟合。研究表明,试样表面发生点蚀的位置为表面位错露头,其腐蚀发孔的难易程度与相应的位错应变能有关。研究表明,{100}面潜在发孔位置密度高于{124}面,而初始发孔率低于{124}面。{124}面较高的表面能使腐蚀孔生长较快,造成腐蚀后期其孔密度明显低于{100}面。

关键词：高纯铝晶面指数位错腐蚀发孔表面