Papers by Keyword: Research Status

Abstract: Petroleum and natural gas exploration and development are deepening, and the environment and stratum conditions encountered are becoming more and more complex. There are many high-temperature, high-pressure, high-corrosion wells, and the number of ultra-short horizontal directional wells, ultra-deep wells, and extended reach wells are also increasing. The steel drill pipe has not been able to meet and adapt to these requirements. Titanium alloy drill pipe has a series of advantages such as low density, high specific strength, excellent corrosion resistance, high temperature resistance, fatigue resistance, non-magnetic and good flexibility. It is suitable for the development of modern petroleum industry. This article discusses the use of titanium alloy drill pipe in domestic and foreign drilling in horizontal wells with short radius, the design of alloy components in titanium alloy drill pipes, body pipe processing, joint connection and corrosion resistance. Combining the practical application of titanium alloy drill pipe points out the current problems. Finally, from the aspect of drilling cycle, production safety and cost saving, the development and application of titanium alloy drill pipes in deep wells, ultra-deep wells and deep-sea drilling operations are prospected.

Abstract: Surface treated copper foil and its preparation is very important and widely used. The science research and enterprise competition always focus on the surface treated methods in the copper foil field. This paper summarized the typical surface treated processes of copper foil, and emphasized on research progress and problems of copper foil surface treated processes. The brush plating-dealloying treated process of copper foil was proposed based on the problems. The principle and research status of new process was introduced. At last, the future development of surface treated process and application prospect were forecast.

Abstract: The application of Ni-based powder metallurgy superalloys materials was limited for its' difficult-to-machine, such as excessive tool wear, frequent tool change, short tool life, low productivity, and large amount of power consumption etc. So the studying of Ni-based powder metallurgy superalloys drilling process becomes extremely important. This paper mainly introduces the research status of drilling of Ni-based powder metallurgy superalloys materials and through synthesize considering cutting force and cost effective, we determined the optimal of cutting tool materials is carbide YG8 twist drill. The optimal parameters of drilling of Ni-based powder metallurgy superalloys: cutting speed of 15m/min, feed per tooth of 0.02mm/r. When the superalloys material is machined by standard twist drill, it is always appearing the failure modes of drilling.

Abstract: The concept of giant magnetostrictive material, characteristics and main effects were introduced briefly. The actuators based on GMM’s magnetostrictive effect, sensors based on inverse-magnetostrictive effect and self-sensing actuators based on the coupled effects were reviewed. It proposed that self-sensing actuators and sensor actuators on the basis of coupling relationship of magnetostrictive effect, inverse-magnetostrictive effect and other effects were GMM’s new research direction.

Abstract: Giant Magnetostrictive material is a new type of rare earth functional material which is after the rare earth permanent magnets, rare earth luminescent material and rare earth high temperature superconducting material. At present, giant magnetostrictive material has become a domestic research hot spot, and made great achievements. In this paper, research and application status on giant magnetostrictive material has been summarized. It mainly includes two aspects: giant magnetostrictive sensors and self-sensing actuator.

Abstract: This paper introduced the significance of hot stamping on developing lightweight technology and safety property enhancement in China Automotive industry, as well as the research status and progress and market prospect of hot stamping process, Materials and equipments. Key technology and focus of hot stamping are analyzed, direction of hot stamping further development were proposed. Hot stamping process, technology and equipments with completely independent intellectual property rights were developed surrounding energy saving, process stability, quality consistency, flexible distribution of components’ strength , high cost-effective production and so on, which is of important for development of hot stamping in China.

Abstract: In recent years, the photocatalytic properties of nano TiO₂ (nanotitanium dioxide) is one of today’s hottest issues of environmentally friendly materials, medical materials and building materials fields. In this paper, we present the latest research on nanotitanium dioxide to be used in the field of building materials. Based on the history of the photocatalytic properties of nanotitanium dioxide, the application of nanotitanium dioxide in photocatalytic concrete, photocatalytic ceramics, functional coatings and materials in the field of self-cleaning glass has been analyzed. Finally, further research will focus on nanotitanium dioxide used in the field of building materials.

Abstract: As the most widely used fourth energy, compressed air system has high operating costs. The research about energy consumption and energy optimization measures of compressed air system has become the new field to achieve energy saving among countries all over the world. In recent years, air compressor system researches in energy consumption, influence factors, energy saving technologies and energy efficiency evaluation have been carried out at home and abroad, and some achievements have been achieved. This paper summarizes energy consumption research status of air compressor system at home and abroad, and energy-saving technologies of compressed air in generation link, treatment link and gas link, and energy efficiency evaluation methods for of air compressor systems. Potentials and drawbacks of current researches are analyzed simultaneously. In the end energy-saving development directions of air compressor system are predicted.

Abstract: The research status of anti-slide pile with prestressed anchor cable is summarized from the aspects of test, calculation and optimization design. The main problems in the design and application are elaborated, especially the interaction and deformation coordination among prestressed anchor cable, anti-slide pile and soil, as well as the existing shortcomings of soil arch effect, anti-slide pile internal force calculation, landslide thrust calculation and finite element numerical simulation. Anti-slide pile with prestressed anchor cable is analyzed on the research trends of development. Interaction mechanism, time effect, three-dimensional numerical simulation and further optimization design will be the key research direction.

Abstract: Based on the summary of research methods and research results of durability of corroded steel bar and its structure, the factors that affect durability of corroded steel bar were summarized and the corrosion morphology and regularity of steel bar was analyzed as well as the impact on the mechanical properties and fatigue life of steel bar. The weakening of fatigue life of steel bar because of corrosion was illustrated through the typical corroded steel bar fatigue S-N curve. Finally, the study direction on durability of corroded steel bar under fatigue load was proposed according to the research progress and the insufficiency at present.