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Microstructure and mechanical properties of cast Ti-47Al-2Cr-2Nb alloy melted in various crucibles

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China Foundry 2012年第1期9卷 48-52页

作者： Wang Ligang Zheng Lijing cui renjie Yang Lili Zhang Hu School of Materials Science and Engineering Beihang UniversityBeijing 100191China

The main factors limiting the mass production of TiAI-based components are the high reactivity of TiAl- based alloys with the crucible or mould at high temperature. In this work, various crucibles （e.g. CaO, Y203 ceramic crucibles and water-cooled copper crucible） were used to fabricate the Ti-47Al-2Cr-2Nb alloy in a vacuum induction furnace. The effects of crucible materials and melting parameters on the microstructure and mechanical properties of the alloy were analyzed by means of microstructure observation, chemical analysis, tensile test and fracture surface observation. The possibilities of melting TiAI alloys in crucibles made of CaO and Y2O3 refractory materials were also discussed.

关键词： Ti-47Al-2Cr-2Nb alloy ceramic crucibles mechanical properties microstructure

Interaction mechanism between niobium-silicide-based alloy melt and Y_2O_3 refractory crucible in vacuum induction melting process

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China Foundry 2011年第2期8卷 190-196页

作者： Gao Ming Jia Lina Tang Xiaoxia Li Xiaojian cui renjie Zhang Hu School of Material Science and Engineering Beihang University Beijing 100191 China

The Y2O3 crucibles were introduced in the study as an alternative to the traditional ceramic ones in vacuum induction melting of multi-component Nb-16Si-22Ti-2AI-2Hf-17Cr （at.%） alloys, to reveal the possible interactions between the alloy melt and the refractory crucible. Multiple melting time lengths and two cooling schemes were designed and used for the experiments. The chemical composition and microstructure of the tested alloy and the melt-crucible interaction were investigated and evaluated. In the experiments,Y2O3 crucible displays good physical-chemical compatibility. The results indicate that the increment of O element in the as-cast ingot iS： 0.03at.%-0.04at.% （72-97 ppm） and the increment of Y element is very insignificant. The key features of the alloy melt interacting with Y2O3 ceramics are analyzed and concluded in the paper. As a result of the dissolution reactiofi xY2O3 （in molten alloy）＋（1-x）HfO2 （impurity） →,Hf1-xY2xO2-x, a continuous double-layer solid film consisted of HfO2 solid solution （-2 pm） and pure HfO2 （-5μm） is formed on the surface of the test ingot after cooled down in the crucible. The experimental results show that theY2O3 crucible is applicable to the vacuum induction melting of Nb＇ Si based alloys.

关键词： yttria crucible melt-crucible interaction vaccuum induction melting

Ablation of Zfhx4 results in early postnatal lethality by disrupting the respiratory center in mice

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Journal of Molecular Cell Biology 2021年第3期13卷 210-224页

作者： Meiqin Zhang Sichen Du Huayuan Ou renjie cui Nan Jiang Yifeng Lin Runsheng Ge Duan Ma Jin Zhang Key Laboratory of Metabolism and Molecular Medicine Ministry of EducationDepartment of Biochemistry and Molecular BiologySchool of Basic Medical Sciences&Institutes of Biomedical SciencesShanghai Medical CollegeFudan UniversityShanghai 200032China Children’s Hospital Fudan UniversityShanghai 201102China

Breathing is an integrated motor behavior that is driven and controlled by a network of brainstem ***4 is a zinc finger transcription factor and our results showed that it was specifically expressed in several regions of the mouse *** lacking Zfhx4 died shortly after birth from an apparent inability to initiate *** also found that the electrical rhythm of brainstem‒spinal cord preparations was significantly depressed in Zfhx4-null mice compared to wild-type *** staining revealed that Zfhx4 was coexpressed with Phox2b and Math1 in the brainstem and that Zfhx4 ablation greatly decreased the expression of these proteins,especially in the retrotrapezoid *** ChIP‒seq and mRNA expression microarray analysis identified Phox2b as the direct downstream target gene of Zfhx4,and this finding was validated by ChIP‒*** studies have reported that both Phox2b and Math1 play key roles in the development of the respiratory center,and Phox2b and Math1 knockout mice are neonatal lethal due to severe central *** top of this,our study revealed that Zfhx4 is a critical regulator of Phox2b expression and essential for perinatal breathing.

关键词： parafacial respiratory group Phox2b respiratory center Zfhx4

骨盆骨折尿道损伤后狭窄患者阴茎勃起功能障碍相关性因素的临床研究

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中国男科学杂志 2011年第10期25卷 23-27,34页

作者：崔仁杰傅强上海交通大学附属第六人民医院泌尿外科上海200233

目的研究男性骨盆骨折尿道损伤导致的尿道狭窄与阴茎勃起功能障碍（ED）的相关因素。方法对41例骨盆骨折尿道损伤导致尿道狭窄患者进行IIEF．5量表调查，所有患者接受血管活性药物注射下阴茎血流彩超（PPUD）等检测，并进行统计学分析... 详细信息

目的研究男性骨盆骨折尿道损伤导致的尿道狭窄与阴茎勃起功能障碍（ED）的相关因素。方法对41例骨盆骨折尿道损伤导致尿道狭窄患者进行IIEF．5量表调查，所有患者接受血管活性药物注射下阴茎血流彩超（PPUD）等检测，并进行统计学分析。结果所有41例患者在受伤后均发生了ED，所有患者受伤前后的IIEF-5评分差异有统计学意义，P〈0．001。不同年龄段患者受伤前后IIEF．5评分比较，P≤0．001；而不同年龄段患者受伤后IIEF-5评分组问比较，P〉0．05。不同部位损伤患者受伤前后IIEF-5评分比较，P〈0．001；而不同部位损伤患者受伤后的IIEF-5评分组间比较，P〉0．05。尿道狭窄段长度不同的患者组间比较，差异具有统计学意义；狭窄段较长的患者比狭窄段较短的患者，发生ED概率更高。根据患者PPUD检查结果，约-半患者的ED属于动脉性，部分患者属于静脉性，其他的可能原因为神经性，心理性，混合性或者原因不明。结论骨盆骨折尿道损伤导致尿道狭窄可使患者勃起功能明显受损，其勃起功能与尿道狭窄长度密切相关，与年龄，尿道狭窄部位等相关性不强。

关键词：尿道狭窄勃起功能障碍骨折

辛置煤矿综采工作面供电系统无功补偿技术应用

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山西焦煤科技 2021年第1期45卷 14-16,27页

作者：崔仁杰霍州煤电集团有限责任公司辛置煤矿山西霍州031400

为了解决煤矿井下线路架设过长而导致综采工作面供电线路无功因数较低,出现大量电能损耗与线路老化的问题,辛置煤矿将SVG静止无功发生器作为线路的补偿装置并入线路中,通过专用的高压配电开关与移变的二级配电电路并联,实现对工作面无... 详细信息

为了解决煤矿井下线路架设过长而导致综采工作面供电线路无功因数较低,出现大量电能损耗与线路老化的问题,辛置煤矿将SVG静止无功发生器作为线路的补偿装置并入线路中,通过专用的高压配电开关与移变的二级配电电路并联,实现对工作面无功功率的补偿,功率因数提高至0.98以上。

关键词：无功功率补偿供电系统静止无功发生器

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变频器在煤矿通风机节能监控系统中应用研究

煤炭与化工 2017年第12期40卷 86-89,93页

作者：崔仁杰霍州煤电集团有限责任公司团柏煤矿山西霍州031499

通风机作为煤矿井下的主要设备,担负着为井下输送新鲜空气和排出浑浊空气、煤尘、粉尘、瓦斯等污染气体的主要任务。但同时矿用通风机也是矿用设备中主要耗能设备,因此以矿井通风监控系统为研究对象,结合当前矿井布置、通风要求以及耗... 详细信息

通风机作为煤矿井下的主要设备,担负着为井下输送新鲜空气和排出浑浊空气、煤尘、粉尘、瓦斯等污染气体的主要任务。但同时矿用通风机也是矿用设备中主要耗能设备,因此以矿井通风监控系统为研究对象,结合当前矿井布置、通风要求以及耗能指标,对通风系统进行研究设计,分别对通风监控系统软、硬件部分进行详细设计,并将变频器应用到通风机的控制上。通过对实际应用效果的分析,表明该系统具有操作简单、可靠性高、降低能耗等优点,经济效益明显。

关键词：矿用通风机变频器软硬件设计效果分析

基于MCGS组态软件的煤矿电网能耗监控系统

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山西焦煤科技 2020年第12期44卷 45-49页

作者：崔仁杰霍州煤电集团有限责任公司辛置煤矿山西霍州031400

为了响应国家节能号召,辛置煤矿从节约用电成本入手,设计了一款以MCGS组态软件为基础的煤矿电网能耗监控系统,系统将设备用电量以及节能装置参数集中显示,同时分析采集数据,对异常数据实时预警,实现设备的精准化维护。经试运行,该系统... 详细信息

为了响应国家节能号召,辛置煤矿从节约用电成本入手,设计了一款以MCGS组态软件为基础的煤矿电网能耗监控系统,系统将设备用电量以及节能装置参数集中显示,同时分析采集数据,对异常数据实时预警,实现设备的精准化维护。经试运行,该系统可以节约煤矿月耗电量的5%~8%,实现了对煤矿电网能耗的监测与控制。

关键词： MCGS软件上位机监测系统通信基站电表通信协议驱动设计

Effect of Y on Oxidation Behavior of Directionally Solidified i-Based Single-Crystal Superalloy

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Chinese Journal of Mechanical Engineering 2024年第5期 529-541页

作者： Zihan Zhao Kai Guan renjie cui Jianchao Qin Zhaohui Huang Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials

The effect of yttrium（Y） addition on the oxidation behavior of a Ni-based directionally solidified single-crystal superalloy is investigated in this study. Isothermal oxidation tests for samples with different levels of Y addition are conducted at 1100 °C in air. The Y content of the samples is determined by the actual pickup amount obtained from an Inductively Coupled Plasma-Atomic Emission Spectrometry test. It is discovered that the addition of Y increases the oxide resistance by the scale of an adhesive double-layer oxide, which is composed of Al2O3and spinel Ni（Cr,Al）2O4. With 70 ppm of Y addition, the oxidation mass gain decreases from 12.6 g/m2for the alloy without Y addition to 5.3 g/m2, and the oxidation rate decreases significantly. In addition, the internal nitride disappears after Y doping because of an increase in oxidation scale adherence and a decrease in oxidation products. In this study,the alloy with 660 ppm Y addition demonstrates the best oxidation resistance.

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辊型参数对316L极板连续流道辊压成形的影响

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锻压技术 2021年第11期46卷 91-101页

作者：赵富强杨森赵小军王栋崔仁杰太原科技大学重型机械教育部工程研究中心山西太原030024 潍柴动力股份有限公司山东潍坊261061

设计了辊压成形工艺制备氢燃料电池金属极板流道的辊型,并对316L不锈钢极板流道进行辊压成形过程的数值模拟,将最大减薄率、最大深度偏差率作为评价指标,分析凸模高度、宽度、拔模角及圆角半径等辊型参数对极板流道成形的深度和厚度的... 详细信息

设计了辊压成形工艺制备氢燃料电池金属极板流道的辊型,并对316L不锈钢极板流道进行辊压成形过程的数值模拟,将最大减薄率、最大深度偏差率作为评价指标,分析凸模高度、宽度、拔模角及圆角半径等辊型参数对极板流道成形的深度和厚度的影响规律。结果表明:凸模高度由0.30 mm增加至0.40 mm时,金属极板流道的最大等效应力增大,最大减薄率增大,最大深度偏差率减小;凸模宽度由1.6 mm增加至1.8 mm时,金属极板流道的最大等效应力减小,最大减薄率减小,最大深度偏差率增大;凸模圆角半径由0.15 mm增加至0.25 mm时,金属极板流道各评价指标均减小;凸模拔模角由15°增大至25°时,金属极板流道各评价指标均减小。采用极差分析法发现凸模圆角半径是影响极板流道辊压成形的主要因素,并对不同凸模圆角半径的流道进行了实验验证。

关键词：金属极板流道 316L不锈钢辊压成形辊型参数