Release date:2014-07-23 stem:http://www.broswright.com/
Load of the roll forming machine is not large enough in the skin formation as well as solidification type at semisolid thanks to roof panel roll forming machine technology. Therefore, the roll forming machine heat transfer between the roll and metal is effective even though in some cases, roll forming products cannot be cooled enough so as to solidify the mushy solidification type.
The surface of the roll forming machine products has no crack at the edge even when there are small grooves in the casting direction and are formed at the point where the nozzle can be contacted to the roll forming machine roll. The shrinkage of roll forming machine might be affected by surface defects and could be improved by the cold rolling thanks to roof panel roll forming machine technology. The roll forming machine micro structure in the cross section can be very fine by the effect of the high cooling rate as well as the insulator mold casting. The micro structure of roll forming machine is not uniform at the thickness direction since the center area can be different from other areas in terms of spherical structure. Some roll forming machine may enable low superheat or low solidification rate even in the duplex structure as well as dendrite structure.
The globular crystal that is produced in the roll forming machines can be displayed as the dendrite structure on the cooling slope thanks to roof panel roll forming machine technology. This roll forming machine duplex structure has typical micro structure of the low solidification rate in terms of semisolid casting. The roll forming machine micro structure may also be columnar since there is no interface at center between the upper and lower roll forming machine solidification layers.
This is the characteristic of roll forming machine before and after cold rolling and heat treatment so that the grain size of near surface can be smaller than middle area of thickness direction. Mechanical properties of roll forming machine can be investigated by the tension test and bending test, which are almost as same as the result of roll forming products made from roll forming machine cast slab. The roll forming machine hemming process is operated at the end of the plate in the manufacturing of the automobile and is suitable for many metal working processes. Thickness of the roll forming machine products may be influenced by cracks at the outer surface at speed of 60 m/min. Productivity of roll forming machine is more than five times greater than that of the conventional twin roll caster for metals and the alloys thanks to the possibility of the production of roll forming machine sheet.
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