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Application of silicocalcium in Mg-6Al-0.5Mn alloy

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China Foundry 2007年第4期4卷 284-287页

作者： WANG Li-guo ZHANG Bao-feng ZHU Shi-jie ZHANG Chun-xiang guan shao-kang School of Materials Science and Engineering Zhengzhou University Zhengzhou 450002 China Huanghe Science and Technology College Zhengzhou 450062 China

The mechanical properties of magnesium alloys at both ambient and elevated temperatures can be improved with the existence of Mg2Si phase in the ***,these properties can be deteriorated if the Mg2Si phase is of coarse Chinese script *** of the silicocalcium addition on the microstructure and properties of an Mg-6Al-0.5Mn alloy(AM60)were *** microstructure of the alloy with the addition of silicocalcium is featured with dispersedly distributed small polygonal type Mg2Si *** microhardness,tensile strength,percentage elongation and toughness of as-cast AM60+1.0Si-Ca alloy are 20%,13.3%,28.5% and 50% higher than these of AM60 alloy *** corrosion measurements showed that the silicocalcium-modified AM60 alloy increases the corrosion potential by 0.04V and decreases the lost weight corrosion rate by 45%.

关键词： silicocalcium magnesium alloy microstructure mechanical properties corrosion

Verification of Applying Mg-Alloy AM60B to Motorcycle Wheels with FEM

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Computer Aided Drafting,Design and Manufacturing 2009年第1期19卷 76-80页

作者： WU Li-hong LONG Si-yuan guan shao-kang School of Materials Science and Engineering Zhengzhou University Zhengzhou 450002 China College of Materials Science and Engineering Chongqing University Chongqing 400044 China

To promote the application of Mg alloy to motorcycle wheel to reduce weight, the fatigue analyses of wheels made of A356, AM60B and redesigned AM60B under the same service condition were carried out, revealing that the peak stress is reduced by 25.6% and stress distribution becomes more uniform in Mg-alloy wheel due to its lower elastic modulus in comparison with A1 alloys. The service stress level of redesigned Mg wheel is relaxed further because of its optimized structure by altering the spoke configuration and increasing the fillet between spoke and ring, satisfying the desired reliability with 30% weight saving.

关键词： AM60B motorcycle wheel finite element method structural optimization

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固体硼氮共渗技术在模具中的应用

模具工业 2005年第8期31卷 45-50页

作者：朱世杰石广新关绍康郑州大学郑州450002

详细介绍了固体硼氮共渗的渗剂、工艺参数、渗后的组织与性能、硼氮共渗的机理及其在模具上的应用。通过固体硼氮共渗使模具表面获得了可靠稳定的硼氮渗层,渗层由硼化物层和过渡层组成,具有高的硬度、耐磨性、良好的耐蚀性。硼氮共渗技... 详细信息

详细介绍了固体硼氮共渗的渗剂、工艺参数、渗后的组织与性能、硼氮共渗的机理及其在模具上的应用。通过固体硼氮共渗使模具表面获得了可靠稳定的硼氮渗层,渗层由硼化物层和过渡层组成,具有高的硬度、耐磨性、良好的耐蚀性。硼氮共渗技术应用在模具上可使模具的寿命大幅度提高。

关键词：硼氮共渗硼化物模具使用寿命

Effects of Al on Microstructure and High-Temperature Wear Properties of Austenitic Heat-Resistant Steel

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Journal of Iron and Steel Research International 2012年第3期19卷 62-66页

作者： ZHANG Yan1, SUN Yu-fu2, ZHAO Jing-yu2, guan shao-kang2 (1. School of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China 2. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, Henan, China) [a] School of Materials Engineering Nanjing Institute of Technology Nanjing 211167 Jiangsu China [b] School of Materials Science and Engineering Zhengzhou University Zhengzhou 450002 Henan China

Microstructure and high-temperature dry sliding wear at 600 ~C in ambient air of austenitic heat-resistant steel ZG40Cr25Ni20 with different contents （mass percent） of AI （0 to 7.10~） have been investigated. The results show that microstructures of 4.68% and 7.10% A1 addition content consist of the matrix and reinforcement of inter- metallic compound y＇ and carbide, while microstructures of ZG40Cr25Ni20 without A1 and with A1 of 1.68% are ab- sent of y＇. Higher wear resistance than the original ZG40Cr25Ni20 alloy is achieved in alloys with higher content of A1 under the same high-temperature wear test condition. The wear rates of Fe-25Cr-20Ni-7.10A1 and Fe-25Cr-20Ni- 4.68A1 are only 20.83% and 45.83% of that of Fe-25Cr-20Ni, respectively. Heat-resistant steels with higher con- tents of AI （4.72% and 7.10%） have higher hardness than those with lower contents of AI （1.68% and 0）. Wear mechanisms of ZG40Cr25Ni20 are considered as severe plough plastic deformation and slight adhesive. However, wear mechanisms of Fe-25Cr-20Ni 4.68A1 are light micro-cutting and oxidation-wear, while that of Fe-25Cr-20Ni- 7. 10A1 are severe adhesive transfer and oxidation-wear_

关键词： austenitic heat resistant steel Al microstructure high-temperature sliding wear mechanism

Effect of silicon on phase selection of ternary compounds during solidification of ZA84 magnesium alloy

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Transactions of Nonferrous Metals Society of China 2011年第1期21卷 52-57页

作者：张春香关绍康刘涛李少华刘忠侠郑州大学物理学博士后流动站郑州450001 郑州大学材料科学与工程学院郑州450001 郑州大学研究生院郑州450001

Effect of silicon on the phase selection between τ phase（Mg32（Al,Zn）49） and φ phase（Al2Mg5Zn2） in ZA84（Mg-8Zn-4Al-0.3Mn） magnesium alloy produced by steel mold cast was studied using X-ray diffractometer,scanning electron microscope and differential scanning *** results show that with increasing Si addition in ZA84 alloy,the liquidus temperatures of the alloys and the solidification temperature ranges *** ternary compound in ZA84 alloy is mainly τ phase and a little φ *** adding Si to ZA84 alloy,the preferential precipitation sequence of the ternary compounds changes,φ phase preferentially forms,whereas τ phase is *** solidification kinetics study of phase selection indicates that there is a critical degree of undercooling of the *** the undercooling exceeds the critical degree,τ phase preferentially forms while φ phase is suppressed;otherwise,φ phase preferentially forms while τ phase is suppressed.

关键词： ZA84 alloy silicon phase selection solidification kinetics

热处理对含γ′相抗磨耐热钢组织和硬度的影响

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材料热处理学报 2008年第4期29卷 114-117页

作者：张炎孙玉福闫兴义关绍康郑州大学材料科学与工程学院河南郑州450002

研究了时效和退火处理对添加Al形成Ni3Al(γ′)相的抗磨耐热钢组织和硬度的影响。结果表明,时效处理后,金属间化合物Ni3Al相由颗粒状变为圆球状,800℃保温15h时效后硬度比铸态时提高了22.0%;退火处理后颗粒状Ni3Al相变为圆球状的同时尺... 详细信息

研究了时效和退火处理对添加Al形成Ni3Al(γ′)相的抗磨耐热钢组织和硬度的影响。结果表明,时效处理后,金属间化合物Ni3Al相由颗粒状变为圆球状,800℃保温15h时效后硬度比铸态时提高了22.0%;退火处理后颗粒状Ni3Al相变为圆球状的同时尺寸大幅减小,1200℃保温4h油冷退火后硬度比铸态时提高了35.9%,而保温5h后的组织更为均匀,硬度值稍低于保温4h后的。综合组织和性能的分析,选择最佳的热处理工艺为1200℃保温5h油冷。

关键词：抗磨耐热钢铸态时效退火组织硬度

Effects of RE and Sb on Microstructure of Mg3Al Based Magnesium Alloy

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Effects of RE and Sb on Microstructure of Mg3Al Based Magnes...

2011 First International Conference on High Performance Structures and Materials Engineering (ICHPSM 2011)

作者： SUN Hua-wei LIU Sheng-xin DENG Jing MIAO Jin-Qi guan shao-kang CHEN Yong School of Materials Science and Engineering Zhengzhou University

The influences of Ce, La, Nd, Y, Sb, Zn and Mn on microstructures of Mg3 Al alloys were investigated. The formation of needle-like Al-RE compounds in Mg3 Al alloys added 1%RE have close relations with the type of RE element. La and Ce help the acicular phase formation in Mg3 Al alloy, which mainly are Al4 RE, while, granular Al2 RE phases were observed in the Mg3 Al alloys with 1%Nd and 1%Y. However, spherical Ce Sb instead of needle-like Al4 RE were found in Mg3 Al alloy with 1%Ce and 1%Sb addition. There were not essential differences between the microstructure of Mg3Al-1%Ce-1%Sb and AZ31-1%Ce-1%Sb alloys.

关键词： magnesium alloy Rare Earth microstructure needle-like phase

来源： cnki会议评论

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Cu包裹SiC复合粉体热物理化学性能研究

无机材料学报 2005年第2期20卷 494-498页

作者：张锐王海龙高濂关绍康郭景坤郑州大学材料工程学院郑州450002 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050

采用直接还原一旋转沉淀颗粒包裹工艺制备具有"核-壳"结构的25SiC／75Cu(vol％) 包裹复合粉体,利用DSC-TG-MS联用技术分析了包裹复合粉体的热物理化学变化行为.结果表明,在846℃附近发生氧化物分解反应,释放出O2气体;896℃左右出现低... 详细信息

采用直接还原一旋转沉淀颗粒包裹工艺制备具有"核-壳"结构的25SiC／75Cu(vol％) 包裹复合粉体,利用DSC-TG-MS联用技术分析了包裹复合粉体的热物理化学变化行为.结果表明,在846℃附近发生氧化物分解反应,释放出O2气体;896℃左右出现低共熔混合物的熔融;950℃以上,SiC与Cu发生反应,释放出CO2气体.

关键词：包裹 SiC/Cu 物理化学变化

骨植入镁合金表面缓蚀剂覆载的微弧氧化/PLGA 复合涂层的制备与表征

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表面技术 2021年第2期50卷 30-38页

作者：石梦佳李伟杰马小爽朱世杰关绍康郑州大学材料科学与工程学院郑州450001 河南省先进镁合金重点实验室郑州450002

目的在可降解镁合金表面制备缓蚀剂覆载的微弧氧化/聚乳酸-羟基乙酸(PLGA)复合涂层,提高其耐蚀性。方法首先利用微弧氧化技术在镁合金表面制备出适合复合缓蚀剂涂层的微弧氧化(Micro-Arc Oxidation,MAO)涂层,之后在微弧氧化多孔涂层上浸... 详细信息

目的在可降解镁合金表面制备缓蚀剂覆载的微弧氧化/聚乳酸-羟基乙酸(PLGA)复合涂层,提高其耐蚀性。方法首先利用微弧氧化技术在镁合金表面制备出适合复合缓蚀剂涂层的微弧氧化(Micro-Arc Oxidation,MAO)涂层,之后在微弧氧化多孔涂层上浸涂PLGA-缓蚀剂涂层,得到复合涂层,缓蚀剂选择天然植物提取物姜黄素(Curcumin,Cur)。利用SEM&EDS、FTIR和AFM等实验对涂层形貌、成分及结构进行分析,通过电化学测试、体外浸泡实验评价涂层的耐蚀性能。结果FTIR结果表明Cur可成功覆载在涂层中,且不与PLGA发生反应。电化学测试和体外浸泡实验表明MAO/PLGA-Cur涂层能有效提高镁合金的耐蚀性。动电位极化曲线显示MAO/PLGA-Cur涂覆样品的腐蚀电流密度比基体下降了3个数量级,浸泡14 d的质量损失比基体下降62.04%,比未覆载的样品减少26.63%。结论MAO时间为10 min为最合适复合缓蚀剂涂层的参数。Cur作为缓蚀剂的最佳添加量为0.12%,PLGA的最佳添加量为12%,最佳浸涂角度为0°。

关键词：可降解镁合金骨植入微弧氧化缓蚀剂 PLGA 姜黄素耐蚀性复合涂层