Search results

Gagarin», Voronezh, Russia azach@list.ru, bmyth_np_nikit@mail.ru, czach@list.ru Keywords: 3D-model, machining, CAD-data, AM-technology, high-resource parts.
In our case, we studied samples that underwent reduction using the AM technology with a coating thickness of 40 – 600 μm.
Creation of complex parts, using Material Jetting technology The studies were conducted by the method of regression analysis, for which, on the basis of experimental data, a planning matrix was constructed containing dependent and independent variables.

Employing the designed parameters, the slabs were hot rolled to 5 mm x 1135 mm x 4600 mm plates, which were subsequently hardened and tempered to obtain hardness levels >460 BHN, YS >1300 MPa, UTS >1500 MPa, elongation >8% and reduction in area >25% in the material.
With the help of the aquired data, critical transformation temperatures such as AC3, AC1, transformation start (Ms) and transformation finish (Mf) were determined in each case for further use in deciding process parameters to be employed during rolling as well in the heat treatment processes. 2.4 Calculated Critical Transformation Temperatures.
Hardening Tempering Temp (°C) Time (mins) Hardness (BHN) Temp (°C) Time (mins) Hardness (BHN) YS (MPa) UTS (MPa) El (%) RA (%) A 930 25 441-468 240 90 469-488 1500 1671 8.5 30 B 910 25 452-478 240 90 472-483 1338 1507 8.3 25 C 880 25 438-474 240 90 467-482 1310 1479 8.3 22 D 895 25 441-468 240 90 472-476 1366 1521 9.4 27 E 910 25 - 240 60 462-480 1297 1459 7.1 28 F 910 25 - 230 90 466-480 1449 1609 8.5 25 It is observed from Table-5 that after tempering, hardness varied in the range of 462-488 BHN, YS 1297-1500 MPa, UTS 1479-1671 MPa, elongation 7.1- 9.4% and reduction in area 22-30%.
Oil quenching from a temperature range of 910-930°C and tempering within 230-240°C for 90 minutes helped in achieving an average hardness of 470 BHN, yield strength >1300 MPa, tensile strength >1500 MPa, elongation >8.0% and reduction in area >25% in the steel. 5.

To achieve carbon concentration reduction, it is necessary to reduce carbon monoxide (CO) contamination from the CZ furnace graphite components and to remove the carbon impurities originating from the starting material.
Therefore, carbon contamination reduction during the CZ growth process is important in order to grow CZ silicon with a carbon concentration lower than that of FZ silicon.
Summary of results from data fit to measured carbon concentrations using Eq. 9.
From the carbon concentration reduction rate measured after the increase in the Ar flow rate, the CO evaporation rate from the silicon melt was calculated to be 2.9 × 10-5 μg/cm2∙s (8.2 × 10-3 μg/s).

Solute Mn atom of Cu-Mn with high atomic size misfit and may suppress the dynamic recovery which transforms cell walls to grain boundaries, and allow accumulation of higher dislocations and reduction of cell size to smaller scales.
Dislocation density was calculated from data acquired from X-ray diffraction (XRD, Smart Lab).
High atomic size misfit by Mn solute atoms may suppress the dynamic recovery that transforms cell walls to grain boundaries, and allow accumulation of dislocations to higher density and reduction cell size. 3.
The effect of increasing SFE and low atomic size misfit by Ni solute atoms may offset grain size reduction.

These factors can contribute to a reduction in product strength.
This reduction in hardness in the welded samples is attributed to variations in the temperature of the heat treatment solution.
During the solution heat treatment process, large particle deposits form and spread over rare distances, facilitating dislocation movement and leading to a notable reduction in material strength.
The test data indicate that the highest hardness index is observed in the ST 475 °C sample, specifically measuring 80 HRE in the weld metal area.

Adsorption mechanism of modified peanut shells for Cr(VI) was both physical adsorption and chemical adsorption of adsorbent "adsorption-oxidation and reduction processes".
The data were fitted to the Langmuir isotherm equation ρe /q=1/KbAs+ρe/As (where Kb is the binding constant, As is the saturated adsorption amount) and the Freundlich isotherm equation lgq =lgK+1/nlgρe (where K and n are Freundlich constants) respectively, as shown in Figure1.
The data were fitted to the equation -ln(1-F) = kt, where F = Qt / Q∞, t is time, Qt and Q∞ are the adsorption amount at reaction time t and at equilibrium respectively, and k is the rate constant of the adsorption.
Enhanced abiotic reduction of Cr (VI) in a soil slurry system by natural biomaterial addition.Journal of Hazardous Materials 2008, 160, 422-427.

In view of the dynamic development of electrical and electronic equipment and the reduction of its lifetime, the share of electronic equipment that has become waste has risen.
Given the bulk of this waste and the future reduction of landfill, we therefore consider the recycling of plastics from electrical waste as a subject that needs to be constantly addressed. [6,7] Our main objective was to characterize the currently inexhaustible plastic component of the waste treatment process, to determine its composition and subsequently to propose an environmentally acceptable solution for the processing and utilization of plastic pulp.
Based on the data available so far, we have decided to develop a proposal for the use of plastic pulp as a possible rainwater reservoir.
Based on the above data, the project was successfully implemented, with a longer-term control of the quality of retained water.

The discovered figures show that the performance of the neural computed torque controller is better than a conventional computed torque controller in trajectory tracking and reduction of setting time.
Next inputs from the test data set are ready to the trained backpropagation network.
The reply of the network, the Kp and Kn parameters, are measured with the object in the test data.
There is a significant reduction in setting time which system reaches the desired reference joint angles.

Introduction The current tendency in electronics is the reduction of size while continuously increasing the power consumption due to new functionalities and applications.
In the case of nanocomposites, top surface evolution was recorded with the camera and temperature data was obtained with the software tool FLIR Tools+.
Thus, the reduction of air gaps is the best way to improve heat transfer efficiency.
J Phys Chem Ref Data. 14 (1985) 227-234

., social and economic development, resource reduction input, resource recycling and ecological environment, as well as 16 indexes.
Evaluation and analysis All the statistical data were from "China Statistical Yearbook (1992-2013)", "China Rural Statistical Yearbook (1992-2013)", "China agricultural Statistical Yearbook (1992-2013)", "New China sixty years statistical data collection" and the statistical yearbooks of various provinces of China.
Land output level and per capita net income index of peasant contributed a lot to the economic and social development from a single index, which mainly benefit from adjustment of planting structure, investment on agricultural infrastructure in China, effective implementation of state reduction or exemption of agricultural tax and other benefit farming policy from 2004, which greatly stimulated the enthusiasm of farmers.