纯铁及40Cr钢在熔融LiCl-10%Li2O中的腐蚀行为

采用浸没法腐蚀实验研究了纯铁及40Cr在750℃下，熔融LiC1-10Li2O(％，质量分数)中的腐蚀行为。实验结果表明，纯铁和40Cr在750℃熔融LiC1-10％Li2O中的腐蚀产物均为LiFeO2，腐蚀减重均随时间的延长而增大，并且40Cr的腐蚀减重略低于纯铁。在本实验条件下，奥氏体的耐蚀性能优于铁素体。     

NiAl-28Cr-5.8Mo-0.2Hf合金在LiCl-10%Li2O熔盐中的腐蚀行为

利用浸没法腐蚀实验研究了NiAl—28Cr—5．8Mo-0.2Hf(原子分数，％)合金在750℃下，LiCl—10(质量分数，％)Li2O熔盐中的腐蚀行为。该合金是由：NiAl(β)相、Cr(Mo)相和少量的Hf的固溶体相组成。实验结果表明：Cr(Mo)相的腐蚀优先于NiAl相的腐蚀，腐蚀产物为LiCrO2、LiAlO2，反应所形成的腐蚀层是非保护性的，因此腐蚀动力学曲线呈直线。     

Ni和Ni-Dy合金在熔融LiCl-Li_2O中的腐蚀行为

采用浸没腐蚀实验研究了纯Ni和Ni-Dy合金在937 K熔融LiCl-5%(质量分数)Li_2O中的腐蚀行为。结果表明,Ni和Ni-Dy合金主要发生氧化反应。纯Ni表面腐蚀产物为NiO,Li_2Ni_8O_(10)和LiNiO_2。Ni-Dy合金除形成上述富Ni氧化物外,还形成Dy_2O_3。Ni-Dy合金的腐蚀速率随Dy含量的增高而增大。其中Ni-1Dy和Ni-3Dy合金的腐蚀速率小于纯Ni,而Ni-5Dy和Ni-10Dy合金的腐蚀速率大于纯Ni。因此,加入适量Dy可提高Ni在熔融LiCl-Li_2O中的抗腐蚀能力。     

三种不锈钢在700℃熔融LiCl-Li2O中的腐蚀行为研究

采用失重法,并结合物相分析技术研究了B2205、B409及B439不锈钢在700℃熔融LiCl-5 mass%Li₂O中的腐蚀行为.结果表明,三种不锈钢均遭受严重腐蚀,且其腐蚀失重近似遵循线性规律.不锈钢的腐蚀速率随其Cr含量的增加而减小.不锈钢的快速腐蚀与循环的氯化-氧化反应有关.同时,Li也能快速内扩散形成相应的含锂化物.     

Fe—Cr合金在450℃的KCl及KCl—ZnCl2盐膜中的腐蚀

研究了Fe-10Cr,Fe-25Cr两种合金在450℃于K，Zn氯化物中的腐蚀。结果表明，与在KCl-ZnCl2熔盐中的腐蚀不同，合金无论在固态KCl还是熔融态的KCl-ZnCl2盐膜下均发生了加速腐蚀，且在混合盐膜下的腐蚀更为严重，合金的耐蚀性不随Cr含量的增加而得到改善；Fe-Cr合金在上述两种腐蚀条件下的耐蚀性差异与氧的供应量有关，并导致保护性的氧化膜具有不同的热力学稳定性。     

不同Cr含量的奥氏体不锈钢在700℃煤灰/高硫烟气环境中的腐蚀行为

研究了3种不同Cr含量(质量分数)的奥氏体不锈钢在700℃下煤灰/高硫烟气环境中的腐蚀行为.结果 表明,低Cr合金(19.13％)腐蚀最为严重,氧化膜由外层Fe2O3、内层Cr2O3及CrS组成,外层氧化膜剥落严重;中Cr合金(22.78％)氧化膜结构与低Cr合金类似,但腐蚀程度更轻;高Cr合金(24.00％)表面形成...     

Fe-Cr合金在450℃的KCl及KCCI-ZnCl2盐膜中的腐蚀

研究了Fe-10Cr,Fe-25Cr两种合金在450℃于K,Zn氯化物中的腐蚀.结果表明,与在KCI-ZnCl2熔盐中的腐蚀不同,合金无论在固态的KCl还是熔融态的KCI-ZnCl2盐膜下均发生了加速腐蚀,且在混合盐膜下的腐蚀更为严重,合金的耐蚀性不随Cr含量的增加而得到改善;Fe-Cr合金在上述两种腐蚀条件下的耐蚀性差异与氧的供应量有关,并导致保护性的氧化膜具有不同的热力学稳定性.     

Ti3Al基合金表面两种Cr1-xAlxN(x=0.18,0.47)涂层的热腐蚀性能

利用磁控反应溅射的方法在Ti3Al基合金表面制备了两种不同铝含量的Cr0.82Al0.18N与Cr0.53Al0.47N涂层,测试了这两种涂层在800℃(NR2SO4+25 mass%K2SO4)熔融盐膜百的热腐蚀动力学,并采用X射线衍射仪和带能谱的扫描电镜分析腐蚀产物相组成以及微观结构.结果表明,两种涂层均可降低Ti3Al基合金的热腐蚀速率;涂层热腐蚀产物主要为具有保护性的Cr2O3和θ-Al2O3混合氧化膜,θ-Al2O3的含量随着涂层中Al含量上升递增;和θAl2O3相比,Cr2O3在熔融硫酸盐中的稳定性更好,Cr0.82Al0.18N涂层抗热腐蚀性能优于Cr0.53Al0.47N涂层.     

不同Cr含量对镍基高温合金抗热腐蚀性能的影响

采用涂盐方法研究了不同Cr含量镍基高温合金的热腐蚀过程,利用XRD确定腐蚀产物相结构和采用电子探针观察腐蚀层前沿元素分布情况。结果表明,在900℃涂盐条件下,随着Cr含量增加,合金的热腐蚀抗力逐渐增强。合金中加入Cr后,能促使合金表层形成致密、连续的Cr2O3层,并且随着Cr含量增加,Cr2O3层厚度增加,Al2O3层逐渐向外腐蚀层迁移,从而提高了合金的热腐蚀抗力。     

Co基合金在Na2SO4盐膜下的热腐蚀行为

研究了Co-10Cr、Co-25Cr和Co-10Cr-5Al合金涂敷Na2SO4盐膜后在900℃空气中的热腐蚀行为.结果显示,Co-10Cr合金的腐蚀增重最大,Co-10Cr-5Al的腐蚀增重其次,Co-25Cr合金腐蚀增重最少,抗热腐蚀性能最好.Co-10Cr合金腐蚀膜可分为3层,外层是CoO,中间层是Cr2O3,内层有少量的Cr2S3.Co-10Cr-5Al合金腐蚀膜可分为3层,外层是CoO,中间层是Cr2O3和Al2O3,内腐蚀区有Cr和Al的硫化物.Co-25Cr合金外层是CoO和Cr2O3,内层是单一的Cr2O3,无明显的内硫化现象.     

PHASE DIAGRAM OF SYSTEM NdCl_3-LiCl-KCl

The phase diagram of system NdCl_3-LiCl-KCl has been investigated by DTA.Six surfacescorresponding to the prhnary crystallization of NdCl_3,LiCl,KCl,γ-KCl·NdCl_3,β-3KCl·NdCl_3 and 2KCl·NdCl_3 respectively,eleven univariant lines related to the sec-ondary crystallization,two ternary eutectics E_1(70.5wt-% NdCl_3+8.0wt-% KCl,360℃)and E,(5.0wt-% NdCl_3+ 53.0wt-% KCl,355℃)and one ternary peritectic P(67.0wt-% NdCl_3+10.0wt-% KCl,375℃)were found.It is also chtrified that this studyon the system NdCl_3- KCl differs from previous work in the two transition temperatures:e_1(77.0 wt-% NdCl_3,484℃),e_2(40.0wt-% NdCl_3,620℃),p(70.0wt-%NdCl_3,610℃),3KCl·NdCl_3(690℃)and two reactions:α-3KGl·NdCl_3β-3KGl·NdCl_3 (355℃)β-SKGl·NdCl_3γ-3KCl·NdCl_3 (450℃)The eutectic point e_5(31.0wt-%LiCl,460C)is determined for the pseudobinary system3KCl·NdCl_3—LiCl.     

KF-LiCl-BaCl_2及LiF-LiCl-BaCl_2相图的测定SCIEI

本文测定了KF-LiCl-BaCl_2及LiF-LiCl-BaCl_2的伪三元相图。并就改变一价氟化物阳离子半径的变化和相图中初晶区面积的关系进行了讨论。     

PHASE DIAGRAMS OF KF-LiCI-BaCl_2 AND LiF-LiCI-BaCl_2 SYSTEMS

The phase diagrams of molten salt systems KF-LiCI-BaCl_2 and LiCI-LiF-BaCl_2 havebeen determined by visual polythermal method.The relationship between the change of cationradius of monovalent fluoride and the areas of primary crystal region in the phase diagrams isdiscussed.     

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.