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Information × Registration Number 0213U000041, 0112U004257 , R & D reports Title Investigation of the laws formation of the structure and properties of the laser effects in hybrid processes, a laser welding and cladding popup.stage_title Head Shelyagin Vladimir Dmitrievich, Кандидат технічних наук Registration Date 14-01-2013 Organization E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine popup.description2 During the work found that the overall picture of residual stresses in welded hybrid method sample size affect the absolute values ??of stresses in the seam and general relativity, with approximately (0.3 ... 0.5)Dp/2 from the center line of the center of the integrated Spot Dp laser-arc heating dominated compressive stress, and in the peripheral zone of the weld cross section is dominated by tensile stresses. In the cast weld metal occur plastic deformation, which can lead to cracking. Determination of stress state on the corner bend welded sample showed that the bend angles for samples of steel 13G1S and 10G2FB lie within 160...180 degrees, indicating that the minimum level of residual stresses, for samples of steel 60 bend angle was about 60 degrees, which indicates the presence of significant residual stresses. When measuring residual stresses in the areas of cross-section welds, equal sized X-ray diffractometer DRON-3, available integrated picture of the stress state. A relaxation of residual stresses on microcracks error measurement is 50...100% of the average of the absolute value. Sign measured integral value corresponds to the sign of the residual stresses that prevail, and the value of the measurement error indicates the presence or absence of voltages of opposite sign. To improve the accuracy of measurement of residual stresses should use a relative measure of the stress state, which is the ratio of the measured integral values to tensile strength the base metal. To improve the accuracy of measurement of residual stresses on a DRON-3 for each of the samples did capture three: one - at 90, the other two - at angles 30 (deviations in both directions from the middle position). Thus the most watched one clear line owned one of the characteristic X-ray phase. By blurring the line with deviations from the mean position determined by the absolute value of internal stresses on the surface of the sample within the error of the experiment. Measurements of the stress of the first kind have shown that hybrid method samples welded with steel 13G1S and 10G2FB stress state and the minimum is at less than the error level of the device, in cast metal joints in steel samples 60 were found compressive residual stress about 300 MPa. Product Description popup.authors Бондарєва Валентина Іванівна Хаскін Владислав Юрійович popup.nrat_date 2020-04-02 Close