非晶态Fe—W镀层铬酸盐钝化膜耐蚀机理探讨

Ｆｅ－Ｗ非晶镀层经铬酸盐钝化处理，可获得有装饰的含Ｃｒ钝化膜，经测定，孔蚀电位较钝化前正移１．６８Ｖ，明显改善了抗Ｃｌ＾－腐蚀的能力，ＡＥＳ与ＸＰＳ的分析结果表明，钝化膜由内外两层构成，外层为Ｆｅ（ＣｒＯ４）３．Ｃｒ２（ＣｒＯ４）３／Ｃｒ２（Ｃｒ２Ｏ７）３．Ｆｅ（ＯＨ）３／ＦｅＯＯＨ．ＷＯ３．ｎＨ２Ｏ等化合物，内层由Ｃｒ２Ｏ３，ＣｒＯ３，ＣｒＯＯＨ，ＦｅＯ，Ｆｅ２Ｏ３及ＷＯ３组成。钝化膜厚度约为６     

非晶态Fe－W镀层铬酸盐钝化膜耐蚀机理探讨

Ｆｅ－Ｗ非晶镀层经铬酸盐钝化处理，可获得具有装饰效果的含Ｃｒ钝化膜。经测定，孔蚀电位较钝化前正移１．６８Ｖ，明显改善了抗ＣＩ－腐蚀的能力。ＡＥＳ与ＸＰＳ的分析结果表明：钝化膜由内外两层构成，外层为Ｆｅ（ＣｒＯ４）３·Ｃｒ２（ＣｒＯ４）３／Ｃｒ２（Ｃｒ２Ｏ７）３·Ｆｅ（ＯＨ）３／ＦｅＯＯＨ·ＷＯ３·ｎＨ２Ｏ等化合物，内层由Ｃｒ２Ｏ３，ＣｒＯ３，ＣｒＯＯＨ，ＦｅＯ，Ｆｅ２Ｏ３及ＷＯ３组成。钝化膜厚度约为６０ｎｍ。该双层饨化膜有效地阻止了Ｃｌ－对基体金属的腐蚀。     

MICROSTRUCTURE AND DECOMPOSITION OF RS Al-Fe-Cr-Zr ALLOY

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＤＥＣＯＭＰＯＳＩＴＩＯＮＯＦＲＳＡｌ－Ｆｅ－Ｃｒ－ＺｒＡＬＬＯＹ￥ＸｉａｏＹｕｄｅ；ＬｉＳｈｏｎｇｒｕｉ；ＸｉｅＹｏｎｇａｎ；ＸｕＹｉｈｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉ...     

电镀防护性锌基合金镀层钝化膜的耐蚀性

防护性锌基合金镀层钝化膜的耐蚀性比锌镀层钝化膜提高２－４倍。ＸＰＳ及ＡＥＳ分析表明,合金镀层钝化膜与锌镀层钝化膜均由ＣｒＯ３、Ｃｒ２Ｏ３、Ｚｎ（ＯＨ）２、ＺｎＯ及Ｈ２Ｏ等组成,并且ＣｒＯ３／Ｃｒ２Ｏ３的相对含量和Ｚｎ（ＯＨ）２／ＺｎＯ相对含量也基本相同,它们的区别在于,合金镀层钝化膜中总铬量较高,膜层完整、致密,镀层／钝化膜界面存在铁系金属的富集层,这是锌基合金镀层钝化膜具有高耐蚀性的主要原因。     

304不锈钢氧离子溅射的同步辐射光电子能谱原位研究：Ⅰ …

利用同步辐射光电子能谱（ＳＲ－ＸＰＳ）原位研究了经３ｋｅＶＯ２＾＋溅射的ＳＵＳ３０４不锈钢中Ｆｅ、Ｎｉ、Ｃｒ合金元素与氧离子的化学反应活性差异及三种金属元素间的相互作用规律,经低能氧离子溅射后,不锈钢表面形成了一薄层氧化物膜,元素Ｃｒ和Ｎ分别以Ｃｒ２Ｏ３和ＮｉＯ形式存在;铁元素的氧化产物随氧离子溅射量的增加分别以ＦｅＯ、ＦｅＯ和Ｆｅ２Ｏ３共存、全部生成Ｆｅ２Ｏ３的形式存在,在ＳＵＳ３０４不锈钢钢中     

NON-POLLUTION PROCESS FOR COMPLEX REFRACTORY SILVER-GOLD ORES

ＮＯＮ－ＰＯＬＬＵＴＩＯＮＰＲＯＣＥＳＳＦＯＲＣＯＭＰＬＥＸＲＥＦＲＡＣＴＯＲＹＳＩＬＶＥＲ－ＧＯＬＤＯＲＥＳＸｕＳｈｅｎｇｍｉｎｇ；ＺｈａｎｇＣｈｕａｎｆｕ；ＬｉＺｕｏｇａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，Ｃｅ...     

20碳钢在三元复合驱溶液中的腐蚀行为

采用电化学测试技术与ＸＰＳ技术,研究了２０碳钢在三元复合驱溶液中的的电化学行为及钝化膜的组成与结构,结果表明,２０碳钢在三元复合驱溶液中发生钝化,形成的钝化膜组成为：Ｆｅ３Ｏ４,ＦｅＯＯＨ,Ｆｅ２Ｏ３和Ｆｅ（ＯＨ）２,其厚度约为７ｎｍ铁元素价态沿钝化膜深度变化,由表面＋３价到近基体表面＋３价与＋２价并存。     

ELECTROLYTIC SEPARATION FOR Ce－CARBIDE AND Fe－Ce－CARBIDE IN STEEL

ＥＬＥＣＴＲＯＬＹＴＩＣＳＥＰＡＲＡＴＩＯＮＦＯＲＣｅ－ＣＡＲＢＩＤＥＡＮＤＦｅ－Ｃｅ－ＣＡＲＢＩＤＥＩＮＳＴＥＥＬＸｉａｏ；ＱｉａｎｇＨａｎ；Ｑｉｙｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃａｌＣｈｅｍｉｓｔｒｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅ...     

TiC－PHASE DIFFUSION LAYER FORMATION IN TITANIUM CLAD STEEL COMPOSITE HAVING AN INTERMEDIATE LAYER OF α－Fe

ＴｉＣ－ＰＨＡＳＥＤＩＦＦＵＳＩＯＮＬＡＹＥＲＦＯＲＭＡＴＩＯＮＩＮＴＩＴＡＮＩＵＭＣＬＡＤＳＴＥＥＬＣＯＭＰＯＳＩＴＥＨＡＶＩＮＧＡＮＩＮＴＥＲＭＥＤＩＡＴＥＬＡＹＥＲＯＦα－ＦｅＸｉａＣｈａｎｇｑｉｎｇ；ＪｉｎＺｈａｎｐｅｎｇ（Ｄｅｐａｒｔｍｅｎ...     

HARDENING OF RAPID SOLIDIFICATION Al－Fe－V－Si ALLOY EXPOSED AT ELEVATED TEMPERATURE

ＨＡＲＤＥＮＩＮＧＯＦＲＡＰＩＤＳＯＬＩＤＩＦＩＣＡＴＩＯＮＡｌ－Ｆｅ－Ｖ－ＳｉＡＬＬＯＹＥＸＰＯＳＥＤＡＴＥＬＥＶＡＴＥＤＴＥＭＰＥＲＡＴＵＲＥ￥ＸｕＹｉｈｅｎｇ；ＬｏｎｇＣｈｕｎｇｕａｎｇ；ＬｉＳｏｎｇｒｕｉ；ＬｉＷｅｎｘｉａｎ；ＹａｎｇＳｈｉｂ...     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

The Mirror with Patterns of Auspicious Animals and Grapes——Exquisite cast mirror and the technology of surface tin-enrichment by rubbing-in and infiltration of tin-rich powder

<正>Bronze mirrors were used by the Chinese people before the introduction of the glass mirror.Only after it was replaced by the glass mirror did the bronze mirror gradually retreat from people's lives.Different styles of bronze mirrors were made in different historical periods,particularly in the Warring States Period,the Han and Tang Dynasties,which were the three peaks of the development of bronze mirror arts in ancient China.The casting techniques were exquisite.The surface of the bronze mirror was smooth and bright enough to reflect one's image,and there were scarcely any casting defects on the mirror surface.On the back of the bronze mirror,there were rich depictions of Arts and Humanities,and the ornamentations were also     

The 9th China International Diecasting Congress & Exhibition

The 9th China International Diecasting Congress ＆ Exhibition was held on July 22-24, 2014 at Shanghai New International Expc Centre. This exhibition was the most successful over the years, with over 6890 visitors and 155 exhibitors, and the exhibition area increased by 30% from 9,500 square meters in 2012 to 12340 square meters. Die casting enterprises from a total of 24 countries and regions, including China mainland, Chinese Taiwan and Hong Kong, South Korea, Japan, Germany, India, Thailand, Malaysia, the United States, Russia, Australia, Iran, Ukraine, Brazil, Colombia, Singapore, Austria, Canada, Croatia, France, Turkey, United Kingdom, Vietnam, attended the congress and exhibition.     

Introduction of the Fluid Control Engineering Institute of Kunming University of Science and Technology

正The Fluid Control Engineering Institute of Kunming University of Science and Technology was set up in 1996.The researches of institute concentrate on electro-hydraulic(pneumatic)servo/proportional control and hydromechatronics.The Institute is committed to research and development of electro-hydraulic control of high-end technical equipment in ferrous metallurgy refining produc-     

RARE METALS Volume Contents

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Antimony Induced Crystallization of Amorphous Silicon

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.     

A CUMULATIVE FATIGUE DAMAGE RULE UNDER THE ALTERNATIVE OF CORROSION OR CYCLIC LOADING

Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.