Search results

We can admit that the resulting transfer reaction is achieved in two intermediate stages, one of dissociation and adsorption and the other of steel dissolving [2]: {N2}↔2Nad (1) 2Nad↔2[N] (2) {N2}↔2[N]; (3) In evacuation and casting, the steel oxidizes at its surface – the content of [O] increases – so the number of free spaces n is lowered and thus the absorption of nitrogen is slowed down, yet the content of [N] increases.
The negative influence of nitrogen in steel is manifested in the following reasons: reduces the plasticity and toughness of the steel, in combination with hydrogen contributes to the emergence of air holes in cast steel, it causes steel aging through deposition of nitrides at the boundaries of the structural grains [2].
Conclusions The investigations carried out on the nitrogen removal efficiency in the steel bath and their analysis lead to a number of conclusions, namely: 1) By the same MATLAB program processing data on the bubbling (Db, Tb, Pb) that were processed in Excel, graphical presentation of twin correlations resulting from triple correlation, it has a maximum point and allows choosing subdomains for the processing parameters to obtain values ​​for nitrogen removal efficiency as close to the maximum value, the correlation coefficient R=0.8952 and the deviation from the regression surface: S=3.7127% confirm the validity of this correlation; the effect of the combined influence of bubbling parameters on nitrogen removal efficiency lead to higher values ​​for this parameter (ηN=37.6433% - triple correlation, ηN=38.4517% - double correlation for T=Tmed, ηN=38.2685% - double correlation for P=Pmed, ηN=39.3412% - double correlation D=Dmed) compared with those obtained from simple correlations. 2

The grain outline of MHSS was clear, and the matrix structure was some martensite lath beams.
The number and size of pitting pits increased with the increase of Cl- concentration, which indicated that the pitting corrosion resistance of the MHSS decreased with the increase of ion concentration.
The size of the pitting pit was randomly, therefore, it was mainly based on the number of pitting pits to judge the pitting corrosion resistance of alloys under different Cl- concentrations.

There is no cementation in marl grain.
When the inclined lower yard construction enter the place 2m far from coal conveying channel , it caused roof collapse in the left side of working face with a large number of mud gushing, leading it unable to continue construction.
Grouting holes arrange around the tunnel face, the number 12.An inspection hole is arranged in the middle of the work surface.

Introduction With the rapid development of the electronics industry, the number of passive components in electronic products gradually increased and the miniaturization of electronic devices is still one of the development trends.
And the large number of defects inside the material and at the interface cause the change of charge distribution so as to promote the charge polarization.
Trolier-McKinstry, Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics, Journal of Applied Physics, 107 (2010) 104116

The fine aggregate used was a mixture of tiny grains of rock and granular materials, mainly defined by size, more refined than gravel and coarser than silt.
The vertical axis shows the compressive strength in MPa, while the horizontal axis represents the sample numbers.
Acknowledgements The author would like to acknowledge the support from the Fundamental Research Grant Scheme (FRGS) under a grant number FRGS/1/2019/TK06/UNIMAP/02/6 from the Ministry of Higher Education Malaysia.

The color of the grains ranges from light gray to dark gray depending on the content of impurity components (e.g., iron compounds, unburned particles) [7].
As the analysis shows in comparison with quartz sand, fly-ash as the siliceous component of aerated concrete has a number of advantages.
As known that the addition of gypsum intensify the interaction of Ca(OH)2 and silica, resulting in an increasing number of low-basic calcium hydrosilicates and increases the strength of cement stone [8].

The numerical modelling is tested by experimental work on a number of compositional variants of the newly-developed SCA425+ superalloy, which contains appreciable quantities of Cr.
In order to confirm whether the cast bar contains any grain defect, the bars were macro etched using HCl + 5~10 vol.% H2O2 solution.
US Department of Energy, Morgantown Energy Technology Center, Contract Number DE-FE21-92MC29061, (2002) [13] K.

Floc fractal dimension changes to better reflect the flocculation level and treatment effect for the establishment of floc fractal dimension number of changes in the coagulation control is provided for reference.
Its not only to the source water turbidity, organism has good removal efficiency, but also its elixir dosing quantity and produces a small amount of sludge, forming the flocculant body close-grained, settlement, speed, giving full play to the inorganic flocculant with organic flocculants respective advantages, it has a good application prospect.

In addition, a number of key technologies were advanced that can be realized by the device, including recycling technologies, polymer ultra-fine filter technology, equipment and structural design, workflow design, etc.
Once, filter and washing equipment were vacuum suction filter cartridge, suction filter tank, etc. and because when filter cloth was as filter media, that penetrating filtering of fine powder was very serious, which led to loss of rare metals in large number; moreover, washing product had dead ends and effects was poor.
Currently, this technology won a number of national patents, at the same time has a project plan approval of SME Technology Innovation Fund of Ministry of Science and Technology with research fund of 0.6 million.
[6] Wenzhou Dong’ou Micropore Filtration Co., Ltd., Technology for fine-grain powder of preparation metal or non-metal’s filtration and washing: China, 200510056166.6 [P]. 2007-02-08

(1) Here, ε& denotes the applied strain rate, A is a constant (~10), D is a diffusivity pertinent to the dynamic process which limits the rate at which strain concentrations due to grainboundary/interface sliding are relaxed, G = the shear modulus, k = Boltzmann's constant, b = length of the Burgers vector, T = test temperature, d = the grain diameter, n (=1/m) is the stress exponent of the strain rate, and p is the grain-size exponent of the strain rate.
In making this graph, the grain size exponent p was taken to be 2 (per previous work [9]), and n was assumed to be 1.67 (i.e., m = 0.6).
Flow-localization-model predictions showing the effect of (a) number of specimen slices and (b) values of m and fo on stress-strain behavior.