What's the difference between welded H - section steel and high frequency welded H - section steel and hot rolled H section steel?
Specification and material. When the hot-rolled H steel can fully replace welding of H steel, and the former than the latter to ensure quality. In general, in the structural design of high-rise buildings, should adopt the hot-rolled H steel, steel portal frame of light steel plant, selection of welding H steel with variable cross-section steel index is better, but the project cost can not save much, the reason is that the processing capacity of hot-rolled H steel is smaller, shorter duration, if the calculation of the comprehensive economic benefits (including the project put into use), play a decisive role in the period under the condition of optional hot-rolled H steel, but when the time limit for not strict or some image project, is in line with the principle of conservation of resources selection of welding H steel.
The shunt end piece (T profiles, H59 1 brass) two pieces with the resistance sheet (thickness of 1.5, 20 wide, 45 long, 5 pieces of copper manganese); in high frequency heating mode; copper phosphorus solder welding; brazing process requirements: less than or equal to 1min, focused on solving the problem: positioning and welding (before brazing the process of using gas welding method). The main technical and economic indicators: after welding product surface without oxidation, the welding quality is higher than that of gas welding; resistance welding end pieces and reliable, welding without melting and deformation resistance; ensure shunt; the production efficiency is increased by two times.
There are hot forming and welding composite forming the two modes of production of H steel. The welding of H steel is the appropriate thickness strip is cut into the appropriate width of welding machine will edge and waist are welded together in the continuous welding of H steel metal consumption, production and economic benefits is low, not easy to guarantee products the performance of the uniform. Therefore, the main difference between the H type steel production in rolling mode of.H type steel and ordinary I-beam in rolling on, the latter can be rolled in two roll rolling, the former need in the universal pass. The hot-rolled H steel near net shape continuous casting billet, through four roller universal rolling process the production of high quality, high efficiency, low consumption, low cost and other characteristics, in improving the steel quality and enhance the use of economic benefit has great superiority.
