"N\u00E1prstkov\u00E1, Nata\u0161a" . "Analysis of hardening in the production of stainless steel pipes"@en . . . "2012-01-23+01:00"^^ . "RIV/44555601:13420/12:43884371" . . "P(GA101/09/0504)" . "Anal\u00FDza vznikaj\u00EDc\u00EDch zpevn\u011Bn\u00ED p\u0159i v\u00FDrob\u011B \u0161vov\u00FDch nerezov\u00FDch trubek" . "Anal\u00FDza vznikaj\u00EDc\u00EDch zpevn\u011Bn\u00ED p\u0159i v\u00FDrob\u011B \u0161vov\u00FDch nerezov\u00FDch trubek" . "ICTKI 2012" . "\u00DAst\u00ED nad Labem" . "Anal\u00FDza vznikaj\u00EDc\u00EDch zpevn\u011Bn\u00ED p\u0159i v\u00FDrob\u011B \u0161vov\u00FDch nerezov\u00FDch trubek"@cs . "\u00DAst\u00ED nad Labem" . "1"^^ . "V oblasti v\u00FDroby \u0161vov\u00FDch nerezov\u00FDch trubek za studena, kter\u00E9 jsou ur\u010Deny pro v\u00FDfuky, je, jako v ka\u017Ed\u00E9 v\u00FDrob\u011B, nutno db\u00E1t na kvalitu v\u00FDsledn\u00E9ho produktu. V p\u0159\u00EDpad\u011B t\u011Bchto trubek je vyroben\u00E1 trubka pro z\u00E1kazn\u00EDka pouze polotovarem, kter\u00FD je obvykle d\u00E1le formov\u00E1n. Proto je t\u0159eba dodr\u017Eet nejenom z\u00E1kladn\u00ED po\u017Eadavky na trubku, jako jsou pr\u016Fm\u011Br, tlou\u0161\u0165ka st\u011Bny a materi\u00E1l, ale tak\u00E9 minimalizovat zpevn\u011Bn\u00ED vzni-kaj\u00EDc\u00ED p\u0159i jejich v\u00FDrob\u011B a to tak, aby z\u00E1kazn\u00EDkovi z\u016Fstala co nejv\u011Bt\u0161\u00ED mo\u017Enost n\u00E1sledn\u00E9ho formov\u00E1n\u00ED. \u010Cl\u00E1-nek se zab\u00FDv\u00E1 anal\u00FDzou vlivu jednotliv\u00FDch \u010D\u00E1st\u00ED v\u00FDroby trubky na jej\u00ED v\u00FDsledn\u00E9 zpevn\u011Bn\u00ED. Toto zji\u0161t\u011Bn\u00ED by mohlo b\u00FDt u\u017Eite\u010Dn\u00E9 pro zlep\u0161en\u00ED mechanick\u00FDch vlastnost\u00ED hotov\u00FDch trubek a to z hlediska mo\u017Enosti zv\u00FD\u0161en\u00ED schopnosti t\u011Bchto trubek podrobit se dal\u0161\u00EDmu zpracov\u00E1n\u00ED (t\u00FDk\u00E1 se to zejm\u00E9na pro oh\u00FDb\u00E1n\u00ED, hydro-tv\u00E1\u0159en\u00ED atp.)" . . "[833256C681FC]" . . "2"^^ . "8"^^ . . . "Univerzita Jana Evangelisty Purkyn\u011B v \u00DAst\u00ED nad Labem. Fakulta v\u00FDrobn\u00EDch technologi\u00ED a managementu" . . "V oblasti v\u00FDroby \u0161vov\u00FDch nerezov\u00FDch trubek za studena, kter\u00E9 jsou ur\u010Deny pro v\u00FDfuky, je, jako v ka\u017Ed\u00E9 v\u00FDrob\u011B, nutno db\u00E1t na kvalitu v\u00FDsledn\u00E9ho produktu. V p\u0159\u00EDpad\u011B t\u011Bchto trubek je vyroben\u00E1 trubka pro z\u00E1kazn\u00EDka pouze polotovarem, kter\u00FD je obvykle d\u00E1le formov\u00E1n. Proto je t\u0159eba dodr\u017Eet nejenom z\u00E1kladn\u00ED po\u017Eadavky na trubku, jako jsou pr\u016Fm\u011Br, tlou\u0161\u0165ka st\u011Bny a materi\u00E1l, ale tak\u00E9 minimalizovat zpevn\u011Bn\u00ED vzni-kaj\u00EDc\u00ED p\u0159i jejich v\u00FDrob\u011B a to tak, aby z\u00E1kazn\u00EDkovi z\u016Fstala co nejv\u011Bt\u0161\u00ED mo\u017Enost n\u00E1sledn\u00E9ho formov\u00E1n\u00ED. \u010Cl\u00E1-nek se zab\u00FDv\u00E1 anal\u00FDzou vlivu jednotliv\u00FDch \u010D\u00E1st\u00ED v\u00FDroby trubky na jej\u00ED v\u00FDsledn\u00E9 zpevn\u011Bn\u00ED. Toto zji\u0161t\u011Bn\u00ED by mohlo b\u00FDt u\u017Eite\u010Dn\u00E9 pro zlep\u0161en\u00ED mechanick\u00FDch vlastnost\u00ED hotov\u00FDch trubek a to z hlediska mo\u017Enosti zv\u00FD\u0161en\u00ED schopnosti t\u011Bchto trubek podrobit se dal\u0161\u00EDmu zpracov\u00E1n\u00ED (t\u00FDk\u00E1 se to zejm\u00E9na pro oh\u00FDb\u00E1n\u00ED, hydro-tv\u00E1\u0159en\u00ED atp.)"@cs . "122679" . . . . "The aim of this article was to analyze the influence of individual parts of the forming line for the production of stainless steel seam tubes on the hardening of final pipes and propose measures to eliminate this hardening. It was processed for rolling tubes of ferritic stainless steel 1.4509 (EN 10296-2). As previously mentioned, the degree of hardening was evaluated by tensile tests in three ways: from the con-tractual relationship of yield strength and tensile strength, elongation, and the total strain gauge extension meas-ured by extensometer at maximum load of the test sample. Samples, from which were carved out of the test segments for tensile test were taken before and behind each roll. The rate of hardening was then evaluated for the entire circumference of pipe, which was found in the de-gree of hardening of line parts, and for specific segments of pipe, from which was found in which pipe segment is the greatest hardening. Based on the evaluation of the measured and calculated values was created conclusion that the greatest hardening occurs at the finishing rolls in forming a coil, which is caused by use of inappropriate rolls, primarily designed and dimensioned for manufacturing tubes of the same diameter, but larger wall thick-ness. Furthermore, it was found that the greatest hardening occurs in the pipe segment 180 \u00B0. Based on this it was recommended due to the reduction of hardening change the formation to the so-called Bottom line, which would consist in setting the forming rolls, so that in all line steps the coil bottom was positioned horizontally (at the same height) and was therefore only the transverse edges forming and not the cupping as in the current state. These recommendations may help to increase the capacity of the subsequent processes at the customer and thus to reduce the number of customer complaints."@en . "Analysis of hardening in the production of stainless steel pipes"@en . . . . "978-80-7414-433-2" . "Anal\u00FDza vznikaj\u00EDc\u00EDch zpevn\u011Bn\u00ED p\u0159i v\u00FDrob\u011B \u0161vov\u00FDch nerezov\u00FDch trubek"@cs . . "pipe, hardening, forming, roll"@en . . "13420" . "RIV/44555601:13420/12:43884371!RIV13-GA0-13420___" . . . "Richter, Zden\u011Bk" .