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Information × Registration Number 0302U001182, 0101U004157 , R & D reports Title Elaboration and investigation of cold helical reduction of ShKh-15 steel tubes process popup.stage_title Розробка та дослідження процесу холодної безоправочної гвинтової прокатки труб зі сталі ШХ-15. Head Khanin M.I., Registration Date 04-02-2002 Organization National Metallurgical Academy of Ukraine popup.description2 Helical rolling velocity dependence on degree of tube diameter deformation and feed angle of work-rolls was experimentally obtained. Decrease of feed angle and rise of reduction lead to velocity decrease. In the cold helical rolling process degree of deformation and initial outside diameter to wall-thickness ratio influence on wall change was investigated. Analytical expression to calculate that wall change was elaborated on the experimental data base. Tube diameter and wall-thickness accuracy increases during cold helical rolling operation. Energy and force parameters of the cold reduction of tubes process increase when degree of deformation or initial tube diameter rises. Work hardening of the ШХ-15 steel depend on radial deformation of diameter, tangential circle deformation and heating during cold screw rolling of tubes process. Residual stresses in finished tubes could be diminished by several times in the cold helical rolling of tubes without mandrel. Product Description popup.authors popup.nrat_date 2020-04-02 Close