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Engineering Research Center of the Ministry of Education on Material Compound and Functionalization

Material Compound and Functionalization Engineering Research Center of the Ministry of Education based on School of Materials Science and Engineering of Tianjin University is a multilevel scientific research system from fundamental research and high-tech development to the transformation and application of scientific achievements through integrating the research direction, optimizing the allocation of resources, rallying talents and merging interdisciplines. The center has made prominent achievements in solving key technology of major national projects and in constructing national economy, part of which has realized industrialization with remarkable effects. The Engineering Research Center has become an important base to cultivate high-tech talents in concerned fields of engineering materials.

 

In the field of modern connection technology, the Engineering Research Center carried out work mainly focusing on new connection materials, integrity evaluation of welding engineering structure and extending life technology. For efficient, clean and super-critical key high temperature equipment for thermal power unit, the center found out the early failure mechanism of key high temperature pipe welding joint and put forward the corresponding life-extending technology. It established residual life evaluation technology based on creep damage accumulation, revealed the mechanism of the residual stress and constraint level’s effect on creep crack growth and built a life prediction model quantitatively considering the mentioned two’s effect on high temperature defect. The project’s main work won the first prize of Tianjin Prize for Progress in Science and Technology in 2012.

 

What’s more, the Engineering Research Center, combining with major national demands in recent years, carried out the study of key technology in ocean engineering welding and made a great breakthrough in underwater welding field of offshore engineering structure, such as submerged arc welding process and technology including wet and partly dry welding technology, underwater solid friction stitch welding technology and automatic equipment, which has reached the leading domestic level.

 

In terms of special functional composite materials and its complete sets of production technology, the center focus on metal material phase transition behavior and organization control. It clarified the massive transformation mechanism of solid iron-based alloy, confirmed the critical conditions of the massive transformation, illustrated the mechanism of micro-stress deformation’s influence on massive dynamics phase transition, developed new methods to get acicular ferrite through structure refinement of micro deformation of steel and iron material and mesotherm and isotherm maintaining, and put into production. It also developed high Cr ferritic heat resistant steel, when 650 degrees, whose yield strength and endurance strength is much higher than the international materials of same kind. The project High Pressure Boiler of P91 Steel key Technology Development and Industrialization won the first prize of Tianjin Prize for Progress in Science and Technology in 2013.

 

As to electronic power devices’ high temperature encapsulating material and its preparative technology, it has conducted in-depth research from high-density packaging technology and key encapsulating materials to packaging integrated manufacturing and application, all levels reliability of scientific and engineering application. Nano-silver soldering paste preparation and low temperature sintering connection technology can thoroughly remove the previous pressure of using auxiliary machine required by low temperature sintering and realize pressureless sintering at low temperature to complete the reliable interconnection of chip and baseplate. High-power electronic devices (IGBT and FRED) high temperature encapsulation integration technology has been successfully applied to new encapsulation technology of integrated power electronic module.

 

Contact: Wang Dongpo