Basalt fiber reinforced aluminum matrix composites with different contents (i.e. 0 wt%, 10 30 wt% and 50 wt%) were prepared by hot-press sintering. Microstructure analysis indicates that basalt fibers are uniformly distributed in 10% composite. The interfacial bonding between is good, there no interface reaction matrix. Quasi-static tensile, quasi-static compression dynamic properties of studied, the influences content on mechanical discussed. Meanwhile, failure mechanisms analyzed.

In the coal mine industry, instability failure of an extraction borehole is one main factors leading to decrease in gas rate. The study on strength and mode with different sizes can provide a theoretical basis for optimization selection borehole. this paper, biaxial loading tests are carried out similar specimens, prediction model proposed verified. At same time, numerical simulation specimens analyze process boreholes sizes. results show that hole size has great influence strength,...

According to the industry ecology theory, in simulating flowing way between substance and energy nature ecology, design industrial production systems can use less resource reasonably reduce emissions. As most important large iron & steel enterprise Inner Mongolia, applying theory of Baogang Group gains great achievement saving emission reduction recent years. Based on this paper mainly analyzes practice energy-saving ejection-decreasing BaoGang Group.

Abstract The design of the contact surface has a big impact on how well water jets penetrate coal rock. influence surfaces with various curvatures is studied using numerical modeling to elucidate flow field and seam damage characteristics. jet impingement region can be separated into three areas: velocity concentration, divergent flow, wall recirculation. As pressure rises, field's distribution features become more apparent. Water morphology properties are comparable. peak ratio axis falls...

Ammonium Phosphomolybdate with Dawson structure was prepared by hydrothermal synthesis and characted means of FT-IR, UV-Vis,XRD SEM. The adipic acid cyclohexanone 30 percent hydrogen peroxide under microwave irradiation carried out as a probe reaction to study the catalytic activity. Effects catalyst amount,30wt.% H 2 O amount,microwave power, time were investigated optimized orthogonal experiments simple fact experiments. results show that optimal condition, i.e. mole ratio C 6 10 O: :H 4...

The apparent kinetic model of the hydrogenation alkylation reactor effluent mixture for removal olefin impurities was studied. Hydrogenation experiments over Pd/Al2O3 catalyst were carried out. On basis phase structure, characteristic equation determined. conversion By thermodynamic analysis, mathematical models hydrogen solubility coefficient and determined through correlation with temperature molar mass liquid medium. established parameter estimation. order concentration in close to 1,...

The synthesis technology of linear alkylbenzenes (LABs) was studied through the preparation an Al‐SBA‐15 catalyst, optimization alkylation conditions, and regeneration deactivated catalyst. hydro‐refining over Pd/Al 2 O 3 catalyst carried out to remove unsaturated hydrocarbon impurities from LAB. results reactions in a liquid fixed bed reactor showed that olefin conversion remained above 98 % for time on stream 3000 h, LAB selectivity 93 under following conditions: temperature 260 °C;...

Abstract As the most important component of parts, thread has a great influence on mechanical properties and service performance parts. In order to ensure quality thread, inspection standard involves 11 main characteristics, which surface roughness is studied, research Radial Pitch Diameter Difference (RPDD) still blank. this paper, quasi-static model tapping process developed based roundness error mechanism hole, includes cutting force damping force. Due regenerative nature cutting, each...

Through the benzene alkylation experiments with long chain olefin over solid acid catalysts activated at different temperature in fixed-bed reactor, kinetics of reaction and deactivation catalyst were established. The results showed that activity stability decreased increasing activation catalysts. rate constant ( k ) d kinetic models also estimated through optimization method, respectively. acidity was characterized by ammonia (NH 3 )-temperature programmed desorption (TPD), NH obtained....

The benzene alkylation with long chain olefin over solid acid catalyst in the fixed-bed reactor was carried out under near critical conditions. kinetic model of correlated external diffusion and yield products were determined, parameters, such as, factor, conversion rate constant forming three products, estimated. statistical analysis showed had higher simulation precision. Compared 12~16 mesh (Cat-2), activity selectivity linear alkyl (LAB) 20~40 (Cat-1) higher.

With external diffusion resistance eliminated,alkylation experiments were carried out over a solid acid catalyst in fixed-bed reactor,the fluid density different conditions was calculated with four kinds of equations.An alkylation reaction kinetics model that related rate constant,catalyst deactivation constant and effective coefficient deducted.The kinetic parameters,such as constant,deactivation coefficient,reaction activation energy,deactivation energy energy,were determined through...

The inhomogeneity of microstructures and mechanical properties in an as-quenched thin specification NM450TP wear-resistant steel plate were quantitatively investigated. results show that the exhibit inhomogeneous distribution through thickness area percentage martensite ferrite grains varies regularly thickness, content on top surface is found to be two times at core location more than bottom surface. In addition, exhibits obvious anisotropy tensile properties, strength paralleling rolling...

The radial pitch diameter difference has a great influence on the quality of internal thread. However, it is difficult to accurately control thread in tapping. Therefore, various factors for tapping AISI H13 steel was studied this paper. Parameters with optimum were determined by Taguchi method, and experiment carried out according L18 orthogonal array. Based signal-to-noise ratio variance analysis, experimental results evaluated determine combination obtain smallest level each factor...