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Problem utleniania ciekłego stopu cynku z miedzią i tytanem podczas odlewania taśmy metodą ciągłą.

100%

Wesołowski J. , Ciura L. , Kazana W.

tom R. 46, nr 1

3-6

Przedstawiono wyniki przeprowadzonych badań dotyczących zjawiska okresowego występowania dużej intensywności utleniania stopu cynk-miedź-tytan w warunkach odlewania z tego stopu taśmy metodą ciągłą. Ustalono skład chemiczny fazy niemetalicznej dobrze zwilżonej przez fazę metaliczną stopu. Określono prawdopodobne przyczyny nasilonego utleniania ciekłego stopu na drodze jego transportu do maszyny odlewniczej.

Investigation results of the phenomenon of periodical, great oxidation intensity of the zinc-copper-titanium alloy, at continuous strip casting of that alloy, are presented. The chemical composition of the non-metallic phase of the alloy was determined. The probable cause of the intensified oxidation of the molten alloy, during its transport to the casting machine, has been defined.

High speed twin roll casting of 6016 strip

100%

Haga T. , Ikawa M. , Watari H. , Kumai S.

tom Vol. 18, nr 1-2

371--374

Purpose: of this paper is to clear the possibility of high speed roll casting of thin aluminum alloy strip. 6016 aluminum alloy is used for sheet metal of the automobile. Therefore, casting of 6016 was tried in this study. Castability and characteristics of roll cast 6016 strip were investigated. Design/methodology/approach: was a high speed twin roll caster. The high speed twin roll caster was designed to overcome the low castability of the twin roll caster. Findings: are as below. The 6016 could be cast at speed of 60 m/min. The thickness of the 6016 was 3 mm. The microstructure at as-cast and after T6 heat treatment was shown. The microstructure was very fine by the effect of the rapid solidification. The mechanical properties were investigated by the tension test and 180 degrees bending test. The as-cast strip could be cold rolled down to 1 mm without homogenization. The result of tension test (gage length 50mm) of T4 strip was as below, tensile stress was 242 MPa, proof stress was 123 MPa and elongation was 26%. There was no crack at the outer surface of 180-degree-bent strip until contact. This shows the strip endure the hem forming. Research limitations/implications: is the width of the strip was 100 mm. The test using a large scale twin roll caster must be operated. Practical implications: are as below. The mechanical properties of the roll-cast 6016 were enough for the sheet metal for the automobile. The low productivity of the twin roll caster could be improved, and economy 6016 strip was able to produce. Originality/value: is that 6016 strip could be cast at speed 60 m/min and this strip had good mechanical properties.